YOKOGAWA CX1006, CX1206 Guide

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Model CX1006/CX1206

DAQSTATION CX1000

IM 04L31A01-03E

1st Edition

Notes

Trademarks

Revisions

Thank you for purchasing the CX1000. This manual describes the functions (excluding the communications functions), installation and wiring procedures, operating procedures, and handling precautions of the CX1000. To ensure correct use, please read this manual thoroughly before beginning operation. The following four manuals are also provided in addition to this manual. Read them along with this manual.

Electronic Manuals Provided on the Accompanying CD-ROM

Manual Title Manual No. Description

CX1000/CX2000 IM 04L31A01-17E Describes the communications functions of the Communications Interface CX1000/CX2000 using the Ethernet/serial interface. User’s Manual

DAQSTANDARD for CX IM 04L31A01-61E Describes the functions and operating User’s Manual procedure of the software “DAQSTANDARD

for CX” that comes with the package.

Paper Manuals

Manual Title Manual No. Description

CX1000 Installation and IM 04L31A01-73E Describes concisely the installation Connection Guide procedures and wiring procedures of the

CX1000.

Precautions on the Use of IM 04L31A01-72E Precautions regarding the use of the CX1000/ the CX1000/CX2000 CX2000. The same information is written on

pages ii and iii of this user’s manual.

• This manual describes the CX1000, style number “S1.”

• The contents of this manual are subject to change without prior notice as a result of continuing improvements to the instrument’s performance and functions. Note that

the program control operation described in this manual is not supported by this version of the CX1000. Therefore, the information regarding the program control operation may not be correct.

• Every effort has been made in the preparation of this manual to ensure the accuracy of its contents. However, should you have any questions or find any errors, please contact your nearest YOKOGAWA dealer as listed on the back cover of this manual.

• Copying or reproducing all or any part of the contents of this manual without the permission of Yokogawa Electric Corporation is strictly prohibited.

• The TCP/IP software of this product and the document concerning the TCP/IP software have been developed/created by YOKOGAWA based on the BSD Networking Software, Release 1 that has been licensed from the Regents of the University of California.

• Microsoft, MS-DOS, Windows, and Windows NT are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.

• Zip is either a registered trademark or trademark of Iomega Corporation in the United States and/or other countries.

• Adobe and Acrobat are trademarks of Adobe Systems incorporated.

• Company and product names that appear in this manual are trademarks or registered trademarks of their respective holders.

1st Edition March, 2002

IM 04L31A01-01E

Safety Precautions

About This Manual

• This manual should be read by the end user.

• Read this manual thoroughly and have a clear understanding of the product before operation.

• This manual explains the functions of the product. YOKOGAWA does not guarantee that the product will suit a particular purpose of the user.

• Under absolutely no circumstances may the contents of this manual be transcribed or copied, in part or in whole, without permission.

• The contents of this manual are subject to change without prior notice.

• Every effort has been made in the preparation of this manual to ensure the accuracy of its contents. However, should you have any questions or find any errors or omissions, please contact your nearest YOKOGAWA dealer.

Precautions Related to the Protection, Safety, and Alteration of the Product

• The following safety symbols are used on the product and in this manual.

“Handle with care.” (To avoid injury, death of personnel or damage to the instrument, the operator must refer to the explanation in the manual.)

Functional ground terminal. (Do not use this terminal as a protective ground terminal.)

Protective grounding terminal

Alternating current

• For the protection and safe use of the product and the system controlled by it, be sure to follow the instructions and precautions on safety that are stated in this manual whenever you handle the product. Take special note that if you handle the product in a manner that violate these instructions, the protection functionality of the product may be damaged or impaired. In such cases, YOKOGAWA does not guarantee the quality, performance, function, and safety of the product.

• When installing protection and/or safety circuits such as lightning protection devices and equipment for the product and control system or designing or installing separate protection and/or safety circuits for fool-proof design and fail-safe design of the processes and lines that use the product and the control system, the user should implement these using additional devices and equipment.

• If you are replacing parts or consumable items of the product, make sure to use parts specified by YOKOGAWA.

• This product is not designed or manufactured to be used in critical applications that directly affect or threaten human lives. Such applications include nuclear power equipment, devices using radioactivity, railway facilities, aviation equipment, air navigation facilities, aviation facilities, and medical equipment. If so used, it is the user’s responsibility to include in the system additional equipment and devices that ensure personnel safety.

• Do not modify this product.

ii IM 04L31A01-03E

Safety Precautions

WARNING

Power Supply

Ensure that the source voltage matches the voltage of the power supply before turning ON the power.

Protective Grounding

Make sure to connect the protective grounding to prevent electric shock before turning ON the power.

Necessity of Protective Grounding

Never cut off the internal or external protective earth wire or disconnect the wiring of the protective earth terminal. Doing so invalidates the protective functions of the instrument and poses a potential shock hazard.

Defect of Protective Grounding

Do not operate the instrument if the protective earth or fuse might be defective. Make sure to check them before operation.

Do Not Operate in an Explosive Atmosphere

Do not operate the instrument in the presence of flammable liquids or vapors. Operation in such environments constitutes a safety hazard.

Do Not Remove Covers

The cover should be removed by YOKOGAWA’s qualified personnel only. Opening the cover is dangerous, because some areas inside the instrument have high voltages.

External Connection

Connect the protective grounding before connecting to the item under measurement or to an external control unit.

Damage to the Protective Structure

Operating the CX1000 in a manner not described in this manual may damage its protective structure.

Exemption from Responsibility

• YOKOGAWA makes no warranties regarding the product except those stated in the WARRANTY that is provided separately.

• YOKOGAWA assumes no liability to any party for any loss or damage, direct or indirect, caused by the user or any unpredictable defect of the product.

Handling Precautions of the Software

• YOKOGAWA makes no warranties regarding the software accompanying this product except those stated in the WARRANTY that is provided separately.

• Use the software on a single PC.

• You must purchase another copy of the software, if you are to use the software on another PC.

• Copying the software for any purposes other than backup is strictly prohibited.

• Please store the original media containing the software in a safe place.

• Reverse engineering, such as decompiling of the software, is strictly prohibited.

• No portion of the software supplied by YOKOGAWA may be transferred, exchanged, sublet, or leased for use by any third party without prior permission by YOKOGAWA.

IM 04L31A01-01E

iii

Checking the Contents of the Package

Unpack the box and check the contents before operating the instrument. If some of the contents are not correct or missing or if there is physical damage, contact the dealer from which you purchased them.

CX1000

When you open the operation cover on the front panel, a name plate is located on the back side of the cover. Check that the model name and suffix code given on the name plate on the rear panel match those on the order.

Open the operation cover

STYLE

MODEL SUFFIX

STYLE

MODEL and SUFFIX

Model CX1006 CX1206 External storage medium

Communication interface

Displayed language

Options

Suffix Code –2 (Ethernet + RS-422A/485 serial interface port) must be selected for the communication interface and

/CM1 (Green series communications) must be selected for the Optional Code.

Includes the Modbus master/slave function. However, to use the Modbus master function, /M1 must be selected for the

Optional Code.

Only one of the options can be specified on the CX1006. Cannot be specified on the CX1206.

Suffix Code –1 (with RS-232 serial interface port) or –2 (with RS422/485 interface port) must be selected for the

communication interface. Either one can be specified on the CX1206. Ladder communication (/CM2) cannot be specified on the CX1006.

Either one can be specified on the CX1206.

Suffix Code Optional Code Description

Number of internal control loops: 0, number of inputs for measurement: 6 ch

Number of internal control loops: 2, number of inputs for measurement: 6 ch –1 –2 –3

–0 –1 –2

–1 –2

/A6 /A6R /A4F /A4FR

Floppy disk

Zip disk

ATA flash memory card

Only Ethernet

Ethernet + RS-232 serial interface port

Ethernet + RS-422A/485 serial interface port

Japanese

English

6 measurement alarm outputs

6 measurement alarm output, 8 remote inputs

4 measurement alarm outputs, 1 FAIL output, 1 memory end output

4 measurement alarm outputs, 1 FAIL output, 1 memory end output,

8 remote inputs

/M1 /N2 /P1 /CM1 /CM2 /PG1 /PG2

Computation function

Three-wire isolated RTD (input for measurement)

24-VDC/AC power supply driven

Green series communications

Ladder communications

Program control (number of program patterns: 4)

Program control (number of program patterns: 30)

NO. (Instrument Number)

When contacting the dealer from which you purchased the instrument, please give them the instrument number.

iv IM 04L31A01-03E

Standard Accessories

The standard accessories below are supplied with the instrument. Check that all contents are present and that they are undamaged.

Checking the Contents of the Package

No. Name Part Number/Model Q’ty Note

1 Terminal screws 5 M4 2 Mounting bracket B9900BX 2 For panel mounting 3 DAQSTANDARD CXA100-01 1 Software for setting the CX and

4 CX1000/CX2000 B8700MA 1 CD-ROM containing the PDF files of this

5 CX1000 Installation and IM 04L31A01-73E 1 Abridged paper manual

6 Precautions on the Use IM 04L31A01-72E 1 Paper stating the precautions.

7 External storage medium A1053MP 1 Zip disk (provided only when the external

for CX displaying data CD-ROM used to install

electronic manual manual, the CX1000/CX2000

Connection Guide

of the CX1000/CX2000

Optional Accessories (Sold Separately)

The following optional accessories are available for purchase separately. When you receive the order, check that all contents are present and that they are undamaged. For information and ordering, contact your nearest YOKOGAWA dealer.

Part Name Part Number/Model Q’ty Note

3.5" floppy disk 7059 00 10 2HD Zip disk A1053MP 1 100 MB ATA flash memory card B9968PK 1 24 MB (The size and model may

Shunt resistance 4159 20 1 250 Ω±0.1% (for the screw terminal) 4159 21 1 100 Ω±0.1%

Mounting bracket B9900BX 2

B9968PK 1 ATA flash memory card, provided only

4159 22 1 10 Ω±0.1%

“DAQSTANDARD for CX”

Communication Interface User’s Manual, DAQSTANDARD for CX User’s Manual, and other files.

storage medium suffix code is “-2”)

when the external storage medium suffix code is “-3” (the size and model may change in the future)

change in the future. Check with your YOKOGAWA dealer when ordering.)

IM 04L31A01-01E

How to Use This Manual

Structure of the Manual

This user’s manual consists of the following sections. For details on the communications functions and the software “DAQSTANDARD for CX” provided with the package, see the respective manuals (IM 04L31A01-17E and IM 04L31A01-61E).

Chapter Title and Description

1 Explanation of Functions

Describes in detail the functions of the instrument. The chapters that explain the operation of the CX1000 only describe the operating procedures. For more detailed information about the functions, see this chapter.

2 Installation and Wiring

3 Names of Parts, Display Modes, and Common Operations

4 Control Function Related Setup Operations

5 Program Control Related Setup Operations (Only on Models with the Program

6 Operations during Control Operation

7 Measurement Function Related Setup Operations

8 Operations for Changing the Displayed Contents

9 Data Save/Load Operations

10 Computation and Report Function Related Operations (Only on Models with the

11 Operations of Other Functions

12 Troubleshooting

13 Maintenance

14 Specifications

Appendix Describes the acquisition function of measured data to the internal memory, additional

Index

Describes the installation and wiring procedures of the CX1000.

Describes the names of the parts of the CX1000, the basic key operations, the basic operations carried out initially, and how to use the external storage medium drive.

Describes setup operations related to the control function that are carried out before starting control operations.

Control Option) Describes the setup operations related to program control that are carried out before starting control operations on models with the program control option.

Describes how to switch operation mode during control operation, how to change the setpoints of setting mode, how to tune the control parameters, and the operations on the program control screen (operations only on models with the option).

Describes how to set the PV input of the measurement function and alarms (measurement alarms).

Describes how to change the operating display of both the control function and the measurement function and the display format.

Describes how to write various data to the internal memory, how to save and load from the external storage medium, and the file operations on the external storage medium.

Computation Function Option) Describes how to set and execute operations related to the computation function and report function of the computation function option.

Describes the USER key, key lock, login/logout of key operation, log display, and remote input setting.

Describes the error messages and the troubleshooting measures of the CX1000.

Describes periodic inspection, calibration, and recommended replacement period for worn parts.

Describes the specifications of the CX1000.

information on the computation and report functions, the ASCII file format, and initial settings.

Note

• This user’s manual covers information regarding CX1000s that have a suffix code for language “-2” (English).

• For details on setting the displayed language, see

vi IM 04L31A01-03E

section 3.6

Conventions Used in This Manual

Unit

K........ Denotes “1024.” Example: 768 KB (file size)

k........ Denotes “1000.”

Safety Markings

The following markings are used in this manual.

How to Use This Manual

Danger. Refer to corresponding location on the instrument.

This symbol appears on dangerous locations on the instrument which require special instructions for proper handling or use. The same symbol appears in the corresponding place in the manual to identify those instructions.

WARNING

CAUTION

Note

Symbols Used on Pages Describing Operating Procedures

On pages that describe the operating procedures in Chapter 3 through 11, the following symbols are used to distinguish the procedures from their explanations.

[ ] ................ Indicates character strings that appear on the screen.

Procedure

Calls attention to actions or conditions that could cause serious injury or death to the user, and precautions that can be taken to prevent such occurences.

Calls attentions to actions or conditions that could cause damage to the instrument or user’s data, and precautions that can be taken to prevent such occurrences.

Calls attention to information that is important for proper operation of th instrument.

Example: [Space] soft key, [Volt]

This subsection contains the operating procedure used to carry out the function described in the current section. All procedures are written with inexperienced users in mind; experienced users may not need to carry out all the steps.

IM 04L31A01-01E

Setup Items

Describes the details of the settings and the restrictions that exist with the operating procedure. It does not give a detailed explanation of the function. For details on the function, see chapter 1.

vii

Safety Precautions ..........................................................................................................................ii

Checking the Contents of the Package ..........................................................................................iv

How to Use This Manual ................................................................................................................vi

Chapter 1 Explanation of Functions

1.1 CX1000 Overview ............................................................................................................ 1-1

1.2 Control Function Overview............................................................................................... 1-2

1.3 Basic Settings of Control................................................................................................ 1-13

1.4 PV Input Related Settings .............................................................................................. 1-18

1.5 Contact Input/Output Related Settings .......................................................................... 1-22

1.6 Target Setpoint Related Settings ................................................................................... 1-25

1.7 PID Parameter Settings ................................................................................................. 1-27

1.8 Control Output Suppression Settings............................................................................. 1-31

1.9 Settings for ON/OFF Control.......................................................................................... 1-33

1.10 Control Alarm Related Settings ...................................................................................... 1-34

1.11 Program Control Related Settings ................................................................................. 1-36

1.12 Tuning ............................................................................................................................ 1-50

1.13 Measurement Function Overview .................................................................................. 1-52

1.14 Measurement Function > Measurement Input Related Settings .................................... 1-54

1.15 Measurement Function > Measurement Alarm Related Settings .................................. 1-57

1.16 Display Function............................................................................................................. 1-62

1.17 Data Storage Function ................................................................................................... 1-81

1.18 Computation and Report Functions (Option) ................................................................. 1-86

1.19 Other Functions ............................................................................................................. 1-90

Chapter 2 Installation and Wiring

2.1 Handling Precautions ....................................................................................................... 2-1

2.2 Installation ........................................................................................................................ 2-2

2.3 Wiring ............................................................................................................................... 2-5

2.4 Connecting the Power Supply ........................................................................................ 2-13

Chapter 3 Names of Parts, Display Modes, and Common Operations

3.1 Names and Functions of Sections ................................................................................... 3-1

3.2 Basic Key Operations ....................................................................................................... 3-4

3.3 Setting the Date and Time ............................................................................................. 3-11

3.4 Setting the Brightness of the Display and the Backlight Saver Function........................ 3-13

3.5 Initializing the Setup Data and Clearing the Internal Memory ........................................ 3-14

3.6 Changing the Displayed Language ................................................................................ 3-15

3.7 Changing the Time Zone................................................................................................ 3-16

3.8 Inserting and Ejecting the External Storage Medium ..................................................... 3-17

Chapter 4 Control Function Related Setup Operations

4.1 Control > Control action ................................................................................................... 4-1

4.2 Control > Input setting (Burnout and RJC) ....................................................................... 4-4

4.3 Control > Contact input-registration ................................................................................. 4-6

4.4 Control > AUX (Remote setting, Alarm mode, SP No. selection source) ....................... 4-11

4.5 Control > Output processing .......................................................................................... 4-13

4.6 Control > Relay .............................................................................................................. 4-15

4.7 Control > Tuning setting ................................................................................................. 4-17

viii IM 04L31A01-03E

Contents

4.8 Control input range ........................................................................................................ 4-19

4.9 Control alarm ................................................................................................................. 4-23

4.10 Operation-related parameters/Zone PID........................................................................ 4-25

4.11 PID parameters .............................................................................................................. 4-27

4.12 Control group setting ...................................................................................................... 4-29

4.13 Ten-segment linearizer I/O ............................................................................................. 4-31

4.14 Detailed setting (Control function/Hysteresis) ................................................................ 4-33

Chapter 5 Program Control Related Setup Operations

5.1 Program Pattern Setup Procedure................................................................................... 5-1

5.2 Program parameter setting > Pattern initial setting .......................................................... 5-2

5.3 Program parameter setting > Wait action setting ............................................................. 5-4

5.4 Program parameter setting > Program start setting ......................................................... 5-5

5.5 Program parameter setting > Program pattern setting..................................................... 5-6

5.6 Program parameter setting > Event setting...................................................................... 5-8

5.7 Program parameter setting > Repeat action setting ...................................................... 5-10

5.8 Event output setting ....................................................................................................... 5-11

5.9 AUX (Auto message, Display position) .......................................................................... 5-12

Chapter 6 Operations during Control Operation

6.1 Operations on the Control Group Display (Switching Displayed Information and

Control Operation Modes) ................................................................................................ 6-1

6.2 Switching Displays on the Overview Display.................................................................... 6-6

6.3 Tuning Operation .............................................................................................................. 6-7

6.4 Operations on the Program Control Display (Only on Models with the Program

Control Option)............................................................................................................... 6-10

Chapter 7 Measurement Function Related Setup Operations

7.1 Settings Related to Measurement Inputs ......................................................................... 7-1

7.2 Settings Related to Measurement Alarms ....................................................................... 7-6

7.3 Setting the Temperature Unit ......................................................................................... 7-11

Chapter 8 Operations for Changing the Displayed Contents

8.1 Using the Information Display (Alarm Summary, Message Summary, Memory

Summary, and Control Summary) .................................................................................... 8-1

8.2 Measurement Function > Measurement Group Setup Operation .................................... 8-2

8.3 Measurement Function > Settings Related to Tag Display for Channels ......................... 8-4

8.4 Measurement Function > Operations When Displaying Trend, Digital, and Bar

Graph Displays................................................................................................................. 8-6

8.5 Measurement Function > Operations When Displaying the Overview ............................. 8-8

8.6 Measurement Function > Operations When Displaying the Historical Trend ................... 8-9

8.7 Measurement Function > Changing the Display Update Rate of the Trend Display ...... 8-10

8.8 Measurement Function > Settings Related to Messages Displayed on the

Trend Display and Write Operation ................................................................................ 8-11

8.9 Measurement Function > Changing the Trip Line of the Trend Display .......................... 8-13

8.10 Measurement Function > Changing the Channel Display Color .................................... 8-14

8.11 Measurement Function > Changing the Zone Display of the Trend Display .................. 8-16

8.12 Measurement Function > Setting the Scale Division, Bar Graph Base Position,

Scale Position of Trend Displays .................................................................................... 8-17

8.13 Measurement Function > Setting the Partial Expanded Display on the Trend Display .. 8-21

8.14 Measurement Function > Setting the Display Direction, Background Color,

Waveform Line Width, Trip Line Width, Grid, and Scroll Time ........................................ 8-23

App

IM 04L31A01-01E

Index

Contents

Chapter 9 Data Save/Load Operations

9.1 Acquiring Measurement Data to the Internal Memory and Saving Data to

the External Storage Medium .......................................................................................... 9-1

9.2 Saving Measured/Computed Data at Arbitrary Times (Manual Sample) ......................... 9-7

9.3 Saving and Loading Setup Data ...................................................................................... 9-8

9.4 Loading the Stored Display/Event Data (Historical Trend) ............................................. 9-10

9.5 Managing Files and Checking the Free Space on the External Storage Medium.......... 9-11

9.6 Saving the Screen Image Data ...................................................................................... 9-13

9.7 Clearing the Data in the Internal Memory ...................................................................... 9-14

Chapter 10 Computation and Report Function Related Operations

(Only on Models with the Computation Function Option)

10.1 Assigning Computation Channels and Setting Computing Equations,

Constants and Tags ....................................................................................................... 10-1

10.2 Starting, Stopping, and Resetting the Computation ....................................................... 10-4

10.3 Setting Computation Channel Alarms ............................................................................ 10-5

10.4 Setting TLOG Computations .......................................................................................... 10-8

10.5 Setting the Rolling Average .......................................................................................... 10-11

10.6 Creating Reports .......................................................................................................... 10-12

10.7 Starting/Stopping the Report Function......................................................................... 10-14

Chapter 11 Operations of Other Functions

11.1 USER Key Assignment and Operation .......................................................................... 11-1

11.2 Key Lock......................................................................................................................... 11-3

11.3 Key Operation Login/Logout .......................................................................................... 11-5

11.4 Displaying Logs (Checking Operations) and System Information Display

(Checking the System Specifications)............................................................................ 11-8

11.5 Setting the Measurement Remote Input (/A6R option or /A4FR option) ...................... 11-11

Chapter 12 Troubleshooting

12.1 Messages ....................................................................................................................... 12-1

12.2 Troubleshooting Flow Chart ......................................................................................... 12-11

Chapter 13 Maintenance

13.1 Periodic Inspection ......................................................................................................... 13-1

13.2 Calibration ...................................................................................................................... 13-2

13.3 Replacement of Parts .................................................................................................... 13-4

Chapter 14 Specifications

14.1 Input Section Specifications ........................................................................................... 14-1

14.2 Control Function ............................................................................................................. 14-3

14.3 Alarm Function ............................................................................................................... 14-4

14.4 Display Function............................................................................................................. 14-5

14.5 Storage Function............................................................................................................ 14-7

14.6 Communication Functions ........................................................................................... 14-10

14.7 Options ......................................................................................................................... 14-11

14.8 General Specifications ................................................................................................. 14-14

14.9 Dimensional Drawings ................................................................................................. 14-18

x IM 04L31A01-03E

Contents

Appendix

Index

Appendix 1 Supplementary Explanation of the Acquisition of Display Data/Event Data

to the Internal Memory .......................................................................................App-1

Appendix 2 Supplementary Explanation of the Computation Function ................................App-6

Appendix 3 Meaning and Syntax of Equations ..................................................................... App-9

Appendix 4 Additional Explanation of the Report Function ................................................App-13

Appendix 5 Data Format of ASCII Files ..............................................................................App-16

Appendix 6 Initial Values ..................................................................................................... App-20

Appendix 7 Control Function Block Diagram ...................................................................... App-33

Appendix 8 Explanation of Engineering Units (EU and EUS)............................................. App-39

IM 04L31A01-01E

App

Index

Chapter 1 Explanation of Functions

1.1 CX1000 Overview

The CX1000 consists of a control function and a measurement function. The control function executes control through PID control and ON/OFF control. The measurement function displays and acquires measured data and control-output data.

Control Function

The CX1000 supports thee control modes: single-loop control, cascade control, and loop control with PV switching. It can handle up to two loops of PID control. In addition, the UT Series controllers made by Yokogawa M&C Corporation can be connected and controlled simultaneously as external loops (four loops max.). You can check the control status on the controller style and faceplate style displays and the hybrid style display that is a mixture of the two styles. Furthermore, the overview display allows monitoring of all control loops including external loops. In addition, the CX1000 provides auto-tuning of PID constants as well as manual tuning, which enables you to adjust the control parameters such as PID constants while checking the control status.

Measurement Function

In addition to the measured data for the control function, the CX1000 can acquire up to six channels of measured data. The data can be displayed as waveforms, numeric values, and bar graphs. The measured data along with the control data can be stored to a floppy disk, Zip disk, or ATA flash memory card using the built-in drive.

Conceptual Input/Output Diagram

Explanation of Functions

• Universal control output: for 2 loops Select current, voltage pulse, or relay output.

• Control contact input: 6 inputs

• Control contact input

Relay output: 2 outputs Transistor output: 4 outputs

Magnet

switch

5 universal measurement inputs 6 universal measurement inputs

SSR

Contact input 6 inputs

Contact output 6 outputs

LAN (Ethernet)

CX1000

Ethernet

the control output terminal block)

Control loop

(select 0 or 2 loops)

Serial interface

port

RS-422/485/232

Control output terminal block (Loops 1 and 2)

Option terminal block

(Can be installed in place of

section

Control/measurement input

Control input

terminals

Measurement input

terminal block

Measurement input

Supply

section

terminals

CH1 to CH6

Power

Controllers (up to 4 loops)

100 VAC to 240 VAC 24 VDC/AC (/P1 option)

Select one from the following option terminal blocks.

Measurement alarm output

(/A6 option)

Measurement alarm output +

FAIL/memory end output

(/A4F option)

PLC (such as the FA-M3 by YOKOGAWA)

Measurement alarm

output + remote input/

output

(/A6R option)

Measurement alarm

output + FAIL/memory

end output + remote

input/output

(/A4FR option)

IM 04L31A01-03E

1-1

1.2 Control Function Overview

Control Signal Input/Output

As shown in the following figure, the CX1000 can control up to two loops.

Control PV input

Control output

• Relay

• Voltage pulse

DISP/

ENTER

• Current

The UT Series controllers made by Yokogawa M&C Corporation can be connected via the serial interface and controlled simultaneously as external loops (four loops max.) (see the

CX1000/CX2000 Communication Interface User’s Manual

Analog Input for Loop Control

PV input and remote setpoint input (RSP) are available as control signal inputs. You can select thermocouple, resistance temperature detector, standard signal, or DC voltage for both PV input and RSP input. The RSP input is used as a terget setpoint (SP). There are five input terminals on the control/measurement input terminal block. The figure below shows their assignments according to the number of loops used and the control mode (see the

[Control mode setting] During single-loop control During cascade control During loop control with

PV switching

You can apply scale conversion, bias, input filter, ten-segment linearizer bias, tensegment linearizer approximation, and square-root computation on the control signal input. For thermocouple inputs, you can set reference junction compensation. In addition, ratio setting can be specified against RSP inputs.

(number of analog inputs: 5)

[Up to 2 loops]

Controls

and

switches

··· ···

• SSR

• Magnet switch

etc.

LOOP2

21321

PV, PV1, PV2: PV input, (RSP): RSP input (not used during program control), : unused terminal

Object of

control

(RSP)

LOOP1

(RSP)(RSP)

(RSP)

• TC

• RTD

etc.

Measurement input terminals

PVPV

PV1PV1 PV2PV2

Control Signal Output

The terminal provides universal output. Two loops can be controlled (except cascade control which uses two loops for one control). The following types of control output can be selected.

• PID control output

• Time proportional PID Outputs ON/OFF signals with a pulse width that is proportional relay contact output: to the time as relay contact signals according to the computed

PID value.

• Time proportional PID Outputs ON/OFF signals with a pulse width that is proportional to voltage pulse output: the time as voltages according to the computed PID value.

• Current output (continuous Continuously outputs a current (analog signal) that is PID control output): proportional to the computed PID value.

• On/off control relay Outputs on/off control relay contact signals according to the contact output: polarity (positive/negative) of the deviation between the SP

and the PV.

1-2 IM 04L31A01-03E

OUT

PV derivative type PID (with output bump)

Deviation derivative type PID (with output bump)

1.2 Control Function Overview

Control Methods

PID control and ON/OFF control are available. The following control modes can be selected for both PID control and ON/OFF control.

Control Mode

In PID control, the following three control modes are available in relation to the PV input selection.

• Single-loop control

Basic control consisting of a single system of controller CPU.

PIDSP

OUT

• Cascade control

Control consisting of two systems of controller CPUs that use the primary control output as the secondary control SP.

PV1

PIDSP

PV2

PID

OUT

• Loop control with PV switching

Single-loop control that is switched between two PV inputs (PV1 and PV2) according to a specified condition.

PV1

PV2

Explanation of Functions

IM 04L31A01-03E

PIDSP

OUT

In PID control, you can also select the PID control mode.

PID Control Mode

Depending on the desired operation at the time the SP is changed, you can select the PID control mode from below. The selections between the PV derivative type and deviation derivative type as well as the presence or absence of the control output bumps are automatically made according to the PID control mode and operation mode (fixedpoint control or program control).

• Standard PID control

Controlled so that the control output reaches the new SP quickly after the SP is changed.

• Fixed-point control

Select this mode if you wish to avoid the control OUT from reacting sensitively to the SP change causing a disturbance in the control such as in the case with a continuous fixed-point control.

PV derivative type PID (without output bump) PV derivative type PID (with output bump)

PV OUT

OUT

1-3

1.2 Control Function Overview

Control Parameters

The following control parameters are available. For each group, you can enter up to eight sets of SPs and PID parameters as underlined below. SP, value, relay hysteresis, control action direction, preset output, SP tracking, PV tracking, setpoint limiter, output velocity limiter, auto/manual switching of the over-integration prevention function (anti-reset windup), ON/OFF of the control output suppression function, and SP ramp-rate.

PID Selection Method

The following two methods are available.

• Target setpoint selection method

Rise according to the

setpoint ramp-up

SP1

(No.1 PID)

Switch from SP1 to SP3 Switch from SP3 to SP1 Switch from SP1 to SP2

• Zone PID method

Maximum value of

measurement span

Reference point 6

Reference point 5

Reference point 4

Reference point 3 Reference point 2

Reference point 1

Minimum value of

measurement span

Note

PID constant, control output limiter, ON/OFF of the shutdown function, manual reset

A group (up to 8 groups) consisting of a SP and PID parameters is registered to a PID number (SP number). By specifying the SP number using keys on the front panel, external contact input, or via communications, the SP and PID parameters are switched.

SP3

(No.3 PID)

setting

Fall according to the setpoint ramp-down setting

SP1

(No.1 PID)

SPn: Target setpoint number

SP2

(No.2 PID)

Rise according to the setpoint ramp-up setting

Time

The measurement span is divided into a maximum of seven zones using reference points. The optimum PID constant is preassigned to each zone, and the PID constant (in actuality, other control parameters that are registered using the PID number are included) is automatically switched according to the PV. This method is suited for controlling equipment such as reactors in which the chemical reaction gain varies depending on the temperature.

If the current PV is here, PID constant of PID No. 5 is used for control.

Change in the PV.

• When performing program control operation on models with the program control option, you will select between segment PID method (zone PID selection OFF) and zone PID method.

• For a description on auto tuning, which automatically sets the optimum PID constant, see

section 1.12, “Tuning.”

No.7 PID

No.6 PID

No.5 PID

No.4 PID

No.3 PID

No.2 PID

No.1 PID

1-4 IM 04L31A01-03E

1.2 Control Function Overview

Alarm Output

When the control action status matches the preset status (up to 4 points per loop), the CX1000 can output a relay contact signal from the control output terminal block or the DIO expansion terminal block or display the alarm occurrence status on the screen. In relay contact output, you can select and assign the type of alarm you wish to output at each output terminal of the control output terminal block or the control DIO extension terminal block.

Alarm Type

You can select the alarm type from below. For a detailed explanation on each alarm output, see

section 1.10, “Control Alarm Related Settings.”

PV high-limit alarm, PV low-limit alarm, deviation high-limit alarm, deviation low-limit alarm, deviation high & low limit alarm, deviation within high & low limits alarm, SP highlimit alarm, SP low-limit alarm, output high-limit alarm, and output low-limit alarm.

Alarm Hysteresis

You can set a hysteresis to the setpoints used in the activation and releasing of the alarm.

Example of PV high limit alarm

OFF

Time

Alarm setpoint

Hysteresis

Alarm ON

OFF

Explanation of Functions

Alarm Standby

You can put the alarm output on standby at the initial stage of control operation until the PV input reaches the SP.

Power up

Normal

handling

Alarm Mode

You can set the condition for disabling the alarm output (such as when the operation is stopped).

FAIL Output/Self Diagnosis Output

In addition to the alarm output described above, the following relay contact signal for failure detection can be output from the control output terminal block.

• FAIL output

Output when a failure is detected in the CX1000 CPU. When a failure is detected, the CX1000 is put in the following condition. Control: Stopped (preset output if in the middle of operation, control output is off or 0% when power is turned ON)

• Self diagnosis output

Output when an input burnout, A/D converter failure, or RJC failure occurs. If an input burnout or A/D converter failure is detected, the control output is set to the preset output value. For RJC, PID control continues as though RJC is 0 °C.

Normal

Alarm is not output during this period even if the PV is below the alarm low limit.

Failure

Alarm output ON

Hysteresis

Alarm low limit value

Time

IM 04L31A01-03E

1-5

1.2 Control Function Overview

Control Operation Mode

The following control operation switching is available. The control operation can be switched using keys on the CX1000 control group display (see inputs, or via communications. For a description of the control operation modes on models with the program control option, see “ control function block diagram in the explanation below is a simplified one. For a detailed control function block diagram for each control mode, see appendix 7.

Switching between Remote (REM) and Local (LOC)

Select whether control is executed using the SPs set on the CX1000 or using the external analog signal (RSP) as the SP.

PV input RSP input

Local (LOC)

Controller CPU

RSP

Remote

(REM)

(Analog signal)

Program Control

page 1-12

), using contact

” in the next section. The

Control output

OUT

Switching between Auto (AUT), Manual (MAN), and Cascade (CAS)

When set to auto, the control output value (OUT) is computed from the deviation between the PV input and the SP. When set to manual, the control output value (OUT) that is set manually is used rather than the computed control output value (OUT). Switching to “cascade (CAS)” is possible only when the control mode is set to “cascade control.” In cascade control, the primary PID control output is used as the SP of the secondary PID control.

Switching between Run (RUN) and Stop (STP)

When the operation is stopped, the control output value (OUT) is set to the preset value.

Single-loop control

Manual operation

Manual (MAN)

Preset output

Stop (STP)

PV input

Controller CPU

Output limiter

Run (RUN)

Control output

Auto (AUT)

OUT

Cascade control

PV input 1

(Cascade primary)

PV1 PV2

Controller CPU 1

Cascade

Manual (MAN)

SP1

PV input 2

(Cascade secondary)

SP2

Auto/ Manual

Controller CPU 2 Manual operation

Cascade/ Auto (CAS/AUT)

Output limiter Preset output

Run (RUN)Stop (STP)

Control output

OUT

Enabling/Disabling Auto-Tuning

In PID control, the optimum PID constant is set automatically when auto-tuning (see

page 1-52

) is performed. Auto-tuning is possible only during auto operation.

Contact Input

Contact input can be used to carry out operations such as running/stopping operation, switching operation modes, changing SPs, switching PV inputs (during loop control with PV switching). For a description on the possible operations, see “Contact Input Information Registration” on

1-6 IM 04L31A01-03E

page 1-23

1.2 Control Function Overview

Program Control (Optional Function)

This function is used to ramp-up or ramp-down the SP according to a program pattern. You can set multiple program patterns (up to 30) and switch among them according to the operating condition. A program pattern consists of multiple program segments. There are two methods in selecting the PID constant in program control. One is the “segment PID method” in which the PID constant is switched every segment according to the program pattern setting; the other is the “zone PID method” in which the PID

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

constant is automatically switched according to the PV. The “segment PID method” is used when a different PID constant is required in the same PV region when the temperature is rising and when the temperature is falling.

Segment PID method

1000.0

500.0

0.0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7

No.2 PID

Setting the Operation for Program Control

Settings include the number of repetitions of the program pattern (repeat function), delay function (wait function) for the case when the PV cannot follow up the SP, and alarm output/event output assignments (contact output assignments) according to the program progression.

Operation Mode during Program Control

The following 4 types of operation modes are available.

• Program operation mode Condition in which control is carried out according to the program pattern.

• Hold operation mode Condition in which program operation is paused.

• Reset mode Condition in which program operation is stopped. All event outputs are cleared (off).

• Local operation mode Mode in which fixed-point control is performed independently from the program operation condition.

No.1 PID No.3 PID

The PID constant of PID No. 1 is used in the 5th segment (SEG5).

Explanation of Functions

IM 04L31A01-03E

RESET

Reset mode

RESET

Program operation mode Hold operation mode

Since the remote input cannot be used for the SP during program control, there is no remote/local switching operation.

RUN

RUN per

loop

Release HOLD

HOLD

Program operation

Local operation mode

LOC

1-7

1.2 Control Function Overview

Flow of Setup Procedure

Below is a standard flow of setup procedure in executing control for the first time using auto operation.

Power ON

Initial settings include the following parameters.

Set SP

Set relay hysteresis

Set other control

parameters

Set alarm-related

parameters

Operating condition

Stop control

Initial settings

PID control or

ON/OFF control?

Set SP

Section 1.10

Set PID parameters

Set alarm-related

parameters

Start a test run

Operating condition

Adjust control

Start actual operation

Initial settings

Basic control settings

PV input related settings

Contact input/output

Set in "Control Output Type"

PID controlON/OFF control

of basic control settings

related settings

Control output

suppression

→ Section 1.3

→ Section 1.4

→ Section 1.5

→ Section 1.6

→ Section 1.7

→ Section 1.10

• Auto tuning

• Manual tuning → Section 1.12

• Other adjustments

(Parameters that cannot be changed during operation → section 6.1)

When using program control, set the items that include “Program control: On” in “Basic control settings” indicated above. Then, carry out the following settings in addition to “Target setpoint/PID parameter settings.”

Settings for program control

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

Pattern initial setting

Wait operation setting

Pattern start setting

Program pattern setting

Event setting

Event output setting

Repeat action setting

Operation start time

Start segment number

The operation start time and start segment number is set using key

operations on the operation screen.

→ Section 1.11

Pattern initial setting:

Set the pattern numbers, pattern off/on, number of segments used, segment assignment method, and edit segment number.

Wait operation setting:

Set wait zone off/on, wait zone settings, and timer.

Pattern start setting:

Set starting target setpoint and start code (operation start condition).

Program pattern setting:

Set segment numbers, ramp/soak, final target setpoint, segment time, ramp-rate-time unit, ramp-rate, segment PID group numbers, operation at the time of segment switching, wait operation type, and wait numbers.

Event setting:

Set event types, loop number/type/setpoint (only when PV event is selected), time event ON/OFF, and ON time OFF time (only when time event is selected).

Event output setting:

Set the event type, relay output ON/OFF, and relay output number.

Repeat action setting:

Set the repeat function, number of repetitions, start

segment number, and end segment number.

1-8 IM 04L31A01-03E

1.2 Control Function Overview

Switching Displays

Power ON

Operation display

MENU key

Soft keys

Operation mode

ESC key

Control setting mode [Setting mode (Control)]

MENU key or ESC key

Setup display (#1 to #7

)

Control-related settings are entered in basic setting mode and control setting mode. In addition, settings common to control and measurement are entered in the common and measurement setting mode.

Display Transition Diagram

[End] soft key -> DISP/ENTER key (This operation saves the settings made in the basic setting mode.)

MENU key or ESC key

MENU key

Press the FUNC key for 3 s

Soft keys

Common and measurement setting mode [Set mode]

Press the FUNC

MENU key or ESC key

Setup display (#1 to #11)

key for 3 s

Soft keys

Basic setting mode

ESC key

Setup display (#1 to #12

)

Explanation of Functions

#1 to #8 when program control

is ON.

#1 to #11: Basic common and measurement settings #12: Basic control settings

Basic Control Setup Items in Basic Setting Mode

#1 Control action

PID number, control period, zone PID, restart mode, restart mode (program) (only on models with the control option), initial PID, auto tuning, control mode, method (only during loop control with PV switching), program control ON/OFF (only on models with the program control option), and PID control mode.

#2 Input setting

Burnout and RJC.

#3 Contact input-registration

Contact input registration

#4 AUX

Remote setting, alarm mode, and SP number selection source.

#5 Output processing

Control output, cycle time, and analog-output type

#6 Relay

FAIL ON/OFF, self diagnosis ON/OFF, and relay action/behavior (energize/deenergize, hold/nonhold)

#7 Tuning setting

Tuning item selection

#8 External loop setting (For details on the settings, see the

Communication Interface User’s Manual

CX1000/CX2000

Setup Items in the Control Setting Mode

#1 Control input range

Input type, mode, type, range, span, scale, unit, square root, low-cut, bias, filter, and ratio.

#2 Control alarm

Type, standby, relay output ON/OFF, and alarm value

IM 04L31A01-03E

1-9

1.2 Control Function Overview

#3 Operation-related parameters/Zone PID

#4 PID parameters

#5 Control group setting

#6 Ten-segment linearizer I/O

#7 Program control (only when program control is ON)

#8 Detailed setting (“#7” when program control is OFF)

Suppressing function, ramp-rate-time unit, SP ramp-down-rate/SP ramp-up-rate, tag, tag comment, reference point (when zone PID is selected), switching hysteresis (when zone PID is selected), and reference deviation (when zone PID is selected).

SP, PID constant, output limit, shutdown ON/OFF, manual reset, relay hysteresis (only during ON/OFF control), reverse/direct, and preset output.

Group name, kind (internal loop/external loop/measurement channel), and number.

Input type, mode, and biasing or approximation input/output values.

#1Program parameter setting

Pattern initial setting, wait action setting, program start setting, program pattern setting, event setting, and repeat action setting.

#2Event output setting

Event kind, relay output ON/OFF, number, and program pattern end signal relay output ON/OFF.

#3AUX (Auto message, Display position)

Auto message for program Run/Reset and Program display position.

#1Control function

SP tracking, PV tracking, SP limiter, output velocity limiter, and anti-reset windup auto/manual.

#2Hysteresis (Alarm and PV event)

Alarm hysteresis and PV event hysteresis

1-10 IM 04L31A01-03E

1.2 Control Function Overview

Control Operation Display

In operation mode, the following control operation displays can be shown.

• Control group display This display is used to monitor the control status of multiple loops simultaneously including external loops. You can select from three display styles as shown in the display example in the figure below. If you include the measurement channels for the measurement function in the group, you can also monitor the measured values on the measurement channels at the same time on this display.

• Tuning display This display is used to optimize (tune) the control parameters such as PID constants.

• Overview display This display is used to monitor the alarm status of all control loops.

• DI/DO status display Displays the ON/OFF status of the current contact input (DI) and contact output (DO).

• Control action summary display Displays a log of control actions such as operation run/stop and auto/manual operation switching.

On models with the program control function option, the following additional displays are available: 1) the program operation display, which can show the pattern and current PV accumulated on the screen during program operation and 2) the program event summary display, which shows a log of time events and PV events that occurred during program operation. Displays common with the measurement function include: 1) the alarm summary display, which shows a log of alarm occurrence status and 2) the memory summary display, which shows the file information of the internal memory. In addition, the values of PV, SP, and OUT can be assigned to channels, and the trends of these channels can be displayed along with the trends of measurement channels on the trend display of the measurement function.

• Control group display

Explanation of Functions

Display Examples

IM 04L31A01-03E

• Tuning display

• Control operation summary display

Faceplate style Hybrid styleController style

• Overview display

• Trend display

• DI/DO status display

1-11

1.2 Control Function Overview

Saving Data

Acquisition to the Internal Memory

Along with the measurement data, the data of SPs, PVs and OUT, and event information for control are acquired to the internal memory.

Saving Data to the External Storage Medium

You can save the data acquired in the internal memory to an external storage medium (floppy disk, Zip disk, or ATA flash memory card).

Floppy disk

Communications

DISP

/ENTER

• Control setup data

• Measurement setup data

Zip disk

ATA flash memory card

• Measured data

The following communications functions are available. For a description on the handling of the communications function and the software “DAQSTANDARD for CX” that comes with the package, see the respective manuals.

Communications with Controllers

The CX1000 can communicate with UT Series Controllers made by Yokogawa M&C Corporation to transmit/receive control parameters and receive PV data. Up to four external loops can be constructed.

DISP

/ENTER

Controllers

Up to four units (four loops)

Communications with PLCs

The CX1000 can carry out ladder communications between PLCs (sequencers).

PLCs (such as the FA-M3 by YOKOGAWA)

DISP

/ENTER

DISP

/ENTER

Up to 32 units

Communications with PCs

The CX1000 can communicate with PCs.

• Modbus master/slave

DISP

/ENTER

• Dedicated protocol communications with the PC (Command communications)

• Display settings/data of the CX using “DAQSTANDARD for CX”

1-12 IM 04L31A01-03E

1.2 Control Function Overview

1.3 Basic Settings of Control

PID Group Number

You can set up to eight groups of control parameters (“PID parameters” on the setting display) that you wish to change collectively through control. You set the number of groups to be used from 1 to 8. For example, if you set a value of 4, the selectable PID numbers will be 1 through 4. The parameters that are included in a single control parameter group vary depending on the control method (“Control output” in the settings). During PID control: SP, PID constant, output lower/upper limit, shutdown ON/OFF

(only when outputting 4-20 mA of current), manual reset, reverse/ direct, and preset output

During ON/OFF control: SP, relay hysteresis, reverse/direct, and preset output

Control Period

The following control periods can be selected: 250 ms (initial value), 500 ms, and 1 s. The control period is common to all loops. When the A/D integral time is set to 100 ms, the control period is fixed to 1 s. The scan interval of control PV input is the same as the control period.

PID Selection Method (Zone PID ON/OFF)

Select either one from below. When program control is ON on models with the program control option, the selection is between the segment PID method (zone PID OFF) and the zone PID method.

• Target setpoint selection method (zone PID: OFF) (initial value)

In the target setpoint selection method, the operator can switch up to 8 SPs as necessary. There are two methods in switching the SPs. One method is to specify the SP number (SPs are registered to PID numbers (= SP numbers) along with PID constants and other parameters) using keys on the front panel. The other is to use external contact input or communications. The SP can be switched at any time. During switching, the setpoint ramp-up-rate or setpoint ramp-down-rate setting is activated. In addition, when a switch is made, control computation is performed using the PID constant group that corresponds to the SP at that point.

Rise according to

ramp-up setting

(No.1 PID)

the setpoint

SP1

Switch from SP1 to SP3 Switch from SP3 to SP1 Switch from SP1 to SP2

SP3

(No.3PID)

Fall according to the setpoint ramp-down setting

SP1

(No.1 PID)

Explanation of Functions

SPn: SP number

SP2

(No.2PID)

Rise according to the setpoint ramp-up setting

Time

IM 04L31A01-03E

1-13

1.3 Basic Settings of Control

• Zone PID method

In the zone PID method, the measurement span is divided into a maximum of seven zones using reference points. The optimum PID constant is preassigned to each zone, and the PID constant (in actuality, other control parameters that are registered using the PID number are included) is automatically switched according to the PV. The number of reference points that can be specified is “PID group number – 2.” As shown in the figure below, if the PID group number is 7, the number of reference points is 5. If the number of reference points is 5, there are 6 zones. For example, if zones 1 through 6 correspond to PID numbers 1 through 6 and if the PV is within the zones of reference points 3 and 4, the control parameters of PID number 4 are selected. The control parameters of PID number 7, which cannot be assigned to a zone, are selected when the deviation between the SP and PV becomes greater than the preset reference deviation.

Maximum value of

measurement span

Reference point 5

Reference point 4

Reference point 3

Reference point 2

Reference point 1

Minimum value of

measurement span

If the current PV here, control using thePID constant of No. 4.

Restart and Restart for Program Control

Select how the CX1000 is to behave when an extended power failure occurs during control operation (power failure period of 5 s or more) and the power recovers.

• Continue (initial setting): Continue the operation before the power failure occurred.

• Manual operation: Start from the manual operation condition.

• Auto operation (only during fixed-point operation): Auto operation by continuing the operation before the power failure occurred.

• Reset (only during program operation): Stop the program operation.

Change in the PV.

No.6 PID

No.5 PID

No.4 PID

No.3 PID

No.2 PID

No.1 PID

Note

If the duration of the power failure is less than or equal to 2 s (a short power disruption), the operation before the disruption continues. If the duration is between 2 to 5 s, the behavior for a short power disruption or an extended power failure is carried out depending on the condition.

Initial PID

Select whether the initial PID constant in PID parameter settings (see optimized to temperature control, pressure control, or flow control. Below are the initial values of PID constants. Initial values for temperature: P = 5.0%, I = 240 s, and D = 60 s. Initial values for pressure/flow: P = 120.0%, I = 20 s, and D = 0 s.

page 1-28

) is

Control Mode

The following three control modes are available. The mode is selected for each control loop.

• Single-loop control

Basic control consisting of a single system of controller CPU.

PIDSP

OUT

1-14 IM 04L31A01-03E

1.3 Basic Settings of Control

Process value = 1–

• Cascade control

Control consisting of two systems of controller CPUs that uses the primary control output as the secondary control SP. Continuous PID control is only possible for primary control.

PV2

PID

OUT

PV1

PID

• Loop control with PV switching

Single-loop control that switches between two PV inputs (PV1 and PV2) according to the following conditions.

PV1

PV2

PIDSP

OUT

Input Switching Condition ([Method] on the setting display)

• Auto switching according to the PV range ([Range] on the setting display) Switches PV inputs (PV1 and PV2) automatically according to the preset “PV switching low-limit” and “PV switching high-limit” as shown in the following figure. However, PV1 must be less than PV2.

PV range high limit

PV switching high limit

PV switching low limit

PV range low limit

The PV value is computed using the following equation when “PV switching lower limit < PV1 ≤ PV switching upper limit” and “PV switching lower limit ≤ PV2 < PV switching upper limit.”

PV input 1 – PV switching low limit

PV switching high limit – PV switching low limit

• Auto switching according to the PV switching upper limit ([PVHigh] on the setting display) The preset “PV switching upper limit” and PV1 are compared. Auto switching is performed according to the following conditions. The switching hysteresis is approximately 0.5% of the PV range span. When PV1 ≤ PV switching upper value: Switch to PV1 When PV1 > PV switching upper value: Switch to PV2

• Switching through control input ([Signal] on the setting display) Input is switched using “PV switching (loops 1 and 2)” (see page 1-23) as follows:

Contact input is OFF: Switch to PV1. Contact input is ON: Switch to PV2.

PV2

Process value according to the equation

PV1

× PV input 1+ × PV input 2

PV input 1 – PV switching low limit

PV switching high limit – PV switching low limit

Explanation of Functions

Program Control ON/OFF (only on models with the program control option)

Select whether to use the program control function. For a description on the settings for program control, see

IM 04L31A01-03E

section 1.11, “Program Control Related Settings.”

1-15

1.3 Basic Settings of Control

PID Control Mode

There are two PID control modes: standard PID control mode and fixed-point control mode. To control the output so that the PV reaches the new SP quickly after the SP is changed, select “standard PID control mode.” To perform a continuous fixed-point control, select “fixed-point control.” As shown in the figure below, the control behavior varies depending on the selected PID control mode. There are two control methods: PV derivative type PID control method and deviation derivative type PID control method. As shown in the figure below, the control method is automatically selected. In addition, the presence or absence of the control output bump at the point of change of the SP is automatically selected. When performing program control in standard PID control mode on models with the program control option, deviation derivative type PID control is used during operation (except during hold and soak) and on the secondary loop of cascade control. For all other cases, PV derivative type PID control is used.

Type of PID Control Mode

Standard PID control mode (Initial value)

Control Method Description of the Control Operation

PV derivative type PID During operation in local mode or auto mode (only the primary side during cascade control)

With bumps in the control output at the time the SP is changed

Deviation derivative type PID During operation in remote mode (secondary side during cascade control)

Employs a PV derivative type PID so that the output reaches the new SP quickly after the target setpoint is changed. In PV derivative type PID, the proportional terms (P) that are proportional to the deviation that occurred due to the SP change are output immediately, forcing the process value to quickly reach the new SP.

By applying the derivative term (D) against the deviation that occurs due to minute changes in the program pattern, the process value quickly tracks the program pattern.

OUT

Fixed-point control mode

With bumps in the control output at the time the SP is changed

PV derivative type PID During operation in local mode or auto mode (only the primary side during cascade control)

Without bumps in the control output at the time the SP is changed

PV derivative type PID During operation in remote mode (secondary side during cascade control)

With bumps in the control output at the time the SP is changed

Use this function on continuous fixed-point control, if you do not wish to disturb the PV caused by the sensitive reaction of the control output (OUT) at the time the SP is changed. In the case of "PV derivative type PID + no control output bumps, " the output value (OUT) does not drastically change at the time the SP is changed. The deviation is gradually eliminated using only the integral term (I) against the deviationthat occurs.

Use this function on the secondary loop of cascade control. A stable control output is achieved without sensitively reacting to the output of the primary loop.

OUT

1-16 IM 04L31A01-03E

1.3 Basic Settings of Control

Control Output

Cycle Time

Select the type of control output from the following. The type can be selected for each loop.

• Time proportional PID relay contact output

• Time proportional PID voltage pulse output

• Current output (continuous PID control output)

• On/off control relay contact output

Time Proportional PID

The result of PID computation is output using a pulse width of an ON/OFF signal that is proportional to the time. The pulse width is calculated using the following equation with the cycle time (control output period, see next section) taken to be 100%. Pulse width = Control output (%) × cycle time You can select relay output or voltage pulse for the output type.

Current Output (Continuous PID Control Output)

The result of PID computation is output using a current (analog signal) that is proportional to the computed PID value. There are four types of output current.

On/Off Control Relay Contact Output

The on and off signals are output using a relay according to the polarity of the deviation between the SP and PV.

Set the cycle time (control output cycle) for the time proportional PID in the range of 1 s to 1000 s. Setting a short cycle time enables precise control. However, the life of the output relay and the input contact on the control element may be shortened, because the number of ON/OFF operations increases. In general, the cycle time is set around 10 s to 30 s for relay output. You can select the cycle time for each loop.

Explanation of Functions

Ratio of the

ON time

Selecting the Analog Output

Select the type of output current when current output is used from the following: 4-20 mA, 0-20 mA, 20-4 mA, and 20-0 mA.

When the cycle time is of medium length

When the cycle time is short

0.0 50.0 Output display value

OFF

When the cycle time is long

OFF

100.0

Cycle time

OFF

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1-17

1.4 PV Input Related Settings

Input Range

Input Type

Select the input source for making input range related settings from the following. Select “RemoteSP” when setting the remote input when you are performing remote/local switching of the SP. When using program control, “RemoteSP” cannot be selected because remote input is not possible.

• During single-loop control or cascade control: PV1/RemoteSP

• During loop control with PV switching: PV1/PV2/RemoteSP/PVrange

Set “process value 1” (PV1) and “process value 2” (PV2). “PVrange” is used for “loop control with PV switching” when the input range of two PV inputs (PV1 and PV2) is different and PV range conversion (see range,” “PV upper-/lower-limits,” “unit,” and “PV switching lower/upper limits” (“PV lower- limit” if the input switching method is “PV High”) are set in place of the following settings.

Measurement Mode

Select from the following according to the type of input. TC (thermocouple), RTD (resistance temperature detector), scale (linear scale), and 1-5 V. Select scale when scaling the input signal to values with an appropriate unit for the application. If you select scale, set the lower and upper limits.

Type (setting only when measurement mode is set to “scale”)

Select the type of input signal from “Volt,” “TC” (thermocouple), and “RTD” (resistance temperature detector.”

Range

Set the range (thermocouple or resistance temperature detector type) that matches the input signal type. This setting determines the measurement range (measurable range).

• Thermocouple R, S, B, K, E, J, T, N, W, L, U, PLATINEL, PR40-20, and W3Re/W25Re.

• Resistance temperature detector Jpt100 and Pt100.

• Voltage Standard signal: 1-5 V (when “measurement mode” is set to “1-5 V”) Current voltage: 20 mV, 60 mV, 200 mV, 2 V, 6 V, 20 V, and 50 V.

Span

Set the “measurement span,” the actual range of control (upper limit and low limit), within the minimum and maximum values of the measurement range.

Unit

You can enter the unit using up to 6 alphanumeric characters.

PV Correction

Input Filter

The input filter can be used to eliminate noise when harmonic noise is included in the PV input such as in current signals and pressure signals. The input filter is first-order-lag computation. The larger the time constant (parameter setting), the stronger the noise elimination function becomes. The input filter is also used for the improvement of the controllability and for phase correction. The time constant of the input filter can be changed during operation as an operation parameter. Selectable range: OFF (no filter) or 1 to 120 s (initial value is OFF)

Raw input

Filter time constant:

small

Filter time constant:

page 1-21

large

) is to be performed. When set to “PV

1-18 IM 04L31A01-03E

1.4 PV Input Related Settings

Bias

This function is used to add a constant value (bias value) to the PV and use the result in the display of the PV and control.

PV input value

Bias value Process value in the instrument

This function can be used in a case when the PV is less than the true value by a constant amount due to the physical circumstances of the detector. For example, the atmospheric temperature inside a furnace can be measured and substituted for the material temperature. This function can also be used to make minute adjustments when the displayed value is within the allowable precision range but small deviation exists between other instruments and you wish to align it. Selectable range: –100.0% to 100.0% of the measurement span (the initial value is 0.0%)

Ten-segment Linearizer Biasing Function

This function is used when you wish to correct the input value due to the deterioration of the sensor. In the ten-segment linearizer biasing function, the output value (b) is the corrected value obtained by adding the bias at numerous arbitrary points (up to 11 points can be specified) against the input value (a), as shown in the figure below. For definitions of the engineering units (EU and EUS), see

appendix 8, “Explanation of

Engineering Units (EU and EUS).”

Selectable range of input values: EU (–5.0% to 105.0%) of the measurement span (the

initial value is 0.0%)

Selectable range of output values: EUS (–100.0% to 100.0%) of the measurement span

(the initial value is 0.0%)

Explanation of Functions

Output

(b)

Corrected value

(sum of the actual input

and the ten-segment

linearizer bias)

n.b4

n.a2 n.a4 Input

Actual input

Ten-segment linearizer bias

(a)

Ten-segment Linearizer Approximation

This function is used when the relationship between the input signal value and the value you wish to measure is not linear such as the level meter and the volume of a spherical tank. In the tensegment linearizer approximation function, you can set the output value (b) to an arbitrary value with respect to the input value (a) of an arbitrary point (up to 11 points can be specified), as shown in the figure below. For definitions of the engineering units (EU and EUS), see

appendix 8, “Explanation of Engineering Units (EU and EUS).”

Selectable range of input value: EU (–5.0% to 105.0%) of the measurement span (the

initial value is 0.0%)

Selectable range of output values: EU (–5.0% to 105.0%) of the measurement span (the

initial value is 0.0%)

IM 04L31A01-03E

1-19

1.4 PV Input Related Settings

Output

(b)

Square-root Computation of PVs

The square-root function is used in the case such as when the differential pressure signal of a restriction flowmeter such as an orifice or a nozzle is converted to a flow signal. You can also set the low-signal cutoff point for the square-root computation. Square-root computation ON/OFF setting: ON or OFF (the initial value is 1.0%) Selectable range of the low-signal cutoff of the analog input: 0.0 to 5.0% (the initial value is OFF)

100.0%

Ten-segment linearizer approximation

Input

(a)

Slope: 1

Low-signal

cutoff point

(0.0 to 5.0%)

Input 100.0%0.0%

PV Range Conversion (only during loop control with PV switching)

The PV range conversion is a function used to determine the PV range of the control function when the measurement range of the two input signal is different for the loop control with PV switching. For example, if the input range of the first input is 0 °C to 500 °C and the input range of the second input is 300 °C to 1000 °C, the PV range conversion is used to convert the PV range of the control function to 0 °C to 1000 °C.

PV range

PV range of PV input 2

PV range of

PV input 1

0 300 500 1000 °C

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1.4 PV Input Related Settings

PV Tracking ON/OFF

The PV tracking function is used to prevent radical changes in the PV. When the PV tracking function is enabled (ON), the SP is forced to match the PV once in the following cases.

• When powering up.

• When switching from manual (MAN) operation mode to auto (AUTO) operation mode.

• When switching from operation stop to operation run.

• When switching the SP number.

The SP is matched against the PV once, and then returns to the original SP according to the “target setpoint ramp-rate (rate of change)” that is specified separately. When using the PV tracking function, make sure to set the SP ramp-rate (rate of change). The ramprate is 0 when it is OFF. Consequently, the PV tracking function does not operate in this case. PV tracking function ON/OFF setting: ON or OFF (the initial value is OFF)

• When PV tracking is OFF

Explanation of Functions

MAN AUTO

Mode switching

• When PV tracking is ON

MAN AUTO

Mode switching

Burnout

When the PV input is a thermocouple or standard signal, a burnout action can be specified. When a burnout is detected, the PV is fixed to positive overrange (when the burnout detection action is set to “UP”) or negative overrange (when the burnout detection action is set to “DOWN”), and the control output is set to preset output.

Reference Junction Compensation

You can select whether to use the internal reference junction compensation function of the CX1000 or an external reference junction compensation function. When using an external reference junction compensation, set an appropriate reference junction compensation voltage. For example, if the reference junction temperature of the external reference compensation is T thermoelectromotive force of the 0-°C reference of T0 °C.

Time

Follows the target setpoint ramp-rate

Time

°C, set the reference compensation junction voltage to the

IM 04L31A01-03E

1-21

1.5 Contact Input/Output Related Settings

Contact Input/Output Terminal

The contact signal is input or output from the control output terminal block indicated in the following figure.

Control output terminal block

As shown in the following figure, contact input terminals (DIGITAL IN) and contact output terminals (DIGITAL OUT) are arranged on the control output terminal block. There are two types of contact outputs: relay output and transistor output. For the connection procedure of the signal wires, see

Relay contact output

section 2.3, “Wiring”

Contact inputTransistor output

Contact Input

LOOP2

NO NC

CTRL OUT

LOOP1

NO NC

DIGITAL OUT

LOOP2

PULS

CTRL OUT

LOOP1

PULS

DIGITAL OUT

5 6

DIGITAL IN

Prescribed operation such as stop/run operation can be performed using contact inputs. There are six contact inputs, and numbers DI001 to DI006 are used to select them.

1-22 IM 04L31A01-03E

1.5 Contact Input/Output Related Settings

Contact Input Information Registration

You can select the information that is registered to the contact input from the following.

Name of Action Detection Action

Stop all loop control operation Trigger Stops the operation of all internal loops. Start all loop control operation Trigger Starts the operation of all internal loops. Stop/run control (loops 1 and 2) Edge Starts/stops the operation of each internal loop. Remote/local (loops 1 and 2) Edge Switches the local/remote operation modes of each

internal loop. Auto/Man operation Edge Switches the auto/manual operation modes of each (loops 1 and 2) internal loop. Cascade switching Trigger Switches the internal loops 1-2 to cascade operation. Auto operation Trigger Switches the internal loops 1-2 to auto operation. Manual operation Trigger Switches the internal loops 1-2 to manual operation. Set target setpoint bits 0 to 3 Trigger Switches the SP to the specified binary value. Start program operation Trigger Starts the program operation (only on models with the

program control option). Stop program operation Trigger Stops the program operation (only on models with the

program control option). Hold Trigger Holds the program operation (only on models with the

program control option). Advance Trigger Advances the program operation (only on models with the

program control option). Set pattern number 0 to 4 bits Trigger Switches the program pattern number to the specified

binary value (only models with the program control option). Input switch contact Edge Switches the PV input (PV1, PV2) of each internal (loops 1 and 2) loop during loop control with PV input switching. Start/Stop Edge Starts/stops data acquisition to the internal memory. Trigger Trigger Trigger used to start acquiring event data to the

internal memory (valid only when “event data” is

specified to be acquired to the internal memory and

the trigger used to start the acquisition is set to

“external trigger”). Alarm ACK Trigger Clears alarm display/relay output (valid only when the

alarm indicator or output relay behavior is set to “hold”). Time adj Trigger Adjusts the internal clock to the nearest hour. Math Edge Starts/stops computation (only on models with the

computation function (/M1)). Math reset Trigger Resets computed data of measurement channels

(Resets the computed value to 0. Only when

computation is stopped on models with the

computation function option). Manual sample Trigger Acquires instantaneous values of all channels to the

internal memory. Load setup data 1 to 3 Trigger Loads the setup data file saved to the external storage

medium. Messages 1 to 8 Trigger Displays message 1 to 8 on the trend display and

stores the message to the internal memory. Snapshot Trigger Saves the screen image data to the external storage

medium.

Explanation of Functions

IM 04L31A01-03E

Method of Detecting Contact Inputs

The above operations are carried out on the rising or falling edge of the contact signal (edge) or the ON signal lasting at least 250 ms (trigger). The remote signal rises when the contact switches from “open to closed” and falls when the contact switches from “closed to open.” For open collector signals, the remote signal rises when the collector signal (voltage level of the input terminal) goes from “high to low” and falls when the collector signal goes “low to high.”

Rising and falling edges

Rising

Falling

Trigger

250 ms or more

1-23

1.5 Contact Input/Output Related Settings

Note

• For a description on how to register contact inputs, see “Setup Items” of

“Basic Control Settings > Contact Input-Registration.”

• On models with the measurement alarm option terminal block /A6R or /A4FR, the actions from “Start/stop” to “Snapshot” can also be assigned to the measurement remote input. For a

description on the assignment of actions to the measurement remote input, see “Measurement Remote Input” on

• If the same action is performed using keys of the CX1000, communications, and contact input, the newest operation/input is valid regardless of the method. This is also true between contact inputs and measurement remote inputs.

page 1-94

Contact Output (FAIL Output, Self Diagnosis Output, and Event Output)

Output Terminal Selection

There are six contact outputs, and numbers DO001 to DO006 are used to select them.

Setting the Relay Action/Hold

Set whether to energize or de-energize the output relay when outputting failure detection found by FAIL or self diagnosis and events. In addition, set whether the relay output is turned OFF when the condition is appropriate for releasing the output, or hold the relay output until an alarm ACK operation is carried out. In the settings, select the behavior from “deenergize/hold,” “deenergize/nonhold,” “energize/hold,” and “energize/non-hold.” In the case of a transistor (open-collector) output, the signal is switched from Off to On during output for an energize setting and from On to Off during output for a de-energize setting. These relay actions are the same as the alarm output relay actions of the measurement function. For details on energize/de-energize and hold/nonhold, see “Energized/De-energized Operation of Alarm Output Relays” and “Hold/Non-hold Operation of Alarm Output Relays” on page 1-60.

FAIL Output

This is the setting for the function that outputs a relay contact signal when a failure is detected in the CX1000 CPU. When FAIL output is turned ON, “DO001” of the control output terminal block is automatically assigned to “de-energized/hon-hold.”

Fault Diagnosis Output

This is the setting for the function that outputs a relay contact signal when an input burnout, A/D converter failure, or reference junction compensation failure occurs. When fault diagnosis output is turned ON, “DO002” of the control output terminal block is automatically assigned to “de-energized/hon-hold.”

Event Output

On models with the program control option, PV events and time events can be assigned to contact outputs. You can select the output terminal for PV events and time events from DO001 to DO006.

section 4.3,

1-24 IM 04L31A01-03E

1.6 Target Setpoint Related Settings

Setting the SP

Set the SP, as one of the PID parameters, for each PID number (1 to 8) in the range of EU (0.0 to 100.0% of the measurement span). The PID number in which the SP has been registered is handled as “SP number” when specifying the setpoint and for other purposes.

SP Assignment

The SP is specified using the SP number. The operation at the time of SP number switching varies depending on the PID selection method.

• When target setpoint selection method is selected The SP number and PID number are synchronized. By switching the SP number, the control parameters (“PID parameters” in the settings) such as the SP and the PID constant are changed to the control parameters registered to the corresponding PID number.

Rise according to

SP1

(

No.1PID

the setpoint

ramp-up setting

)

Switch from SP1 to SP3 Switch from SP3 to SP1 Switch from SP1 to SP2

SP3

(

No.3PID

Fall according to

)

the setpoint ramp-down setting

SP1

(

No.1PID

)

SPn: SP number

SP2

(

No.2PID

Rise according to the setpoint ramp-up setting

Explanation of Functions

)

Time

• When zone PID method is selected The assignment of the SP number and the assignment of the PID number are not synchronized. A PID number (group number of the PID parameter) is registered for each zone beforehand. When the PV changes and becomes a value of a different zone, the PID number automatically changes, but the SP number does not switch.

Note

The value of control alarms corresponds to the SP number (see number is changed, the alarm value also changes accordingly.

Selection of the SP Number to Be Switched Using Contact Input

Set loop 1 and 2 for switching the SP number using the contact input “Set target setpoint bits 0 to 3” (see

page 1-23

Target Setpoint Tracking

The CX1000 can perform operation according to the remote SP (remote input) received from an external source. In this case, it is foreseeable that the output value will drastically change when switching from a remote operation condition to a local operation (operation according to the internal SP of the CX1000) condition or switching from program operation to local operation. To prevent the output value from drastically changing, the CX1000 has a function used to track the output from the remote SP to the local SP. The operation image of target setpoint tracking is shown below.

• When target setpoint tracking is enabled

Local SP

• When target setpoint tracking is disabled

Local SP

section 4.9

). If the SP

IM 04L31A01-03E

Remote SP

Switch from remote to local mode

Remote SP

Switch from remote to local mode

TimeTime

1-25

1.6 Target Setpoint Related Settings

Setpoint Limiter

This function is used to limit the range in which the SP is to change. The value is specified using EU (0.0% to 100.0%). For a definition of the engineering unit (EUS), see

appendix 8, “Explanation of Engineering Units (EU and EUS).”

When not in program operation: Limit the change in the SP. When in program operation: Limit the program setpoint.

Ramp-rate Setting during Target Setpoint Switching

When you do not want the SP to change rapidly or when you wish to change the SP at a constant velocity ramp-rate, you can set the velocity ramp-rate (SP ramp-up rate or SP ramp-down rate) for raising or lowering the SP. The specified velocity ramp-rate functions in the following cases.

• When the SP is changed.

• When the SP number is changed.

• When the CX1000 is powered up (or recovers after a power failure).

The SP changes according to the specified ramp-rate from the PV to the SP.

• When the CX1000 is switched from manual operation to auto operation. The SP changes according to the specified ramp-rate from the PV to the SP.

• When the SP is changed

SP (old)

• When the SP number is changed

SP 2

• At the time of power-up (or recovery after power failure) or when manual/auto operation is switched

Input range

SP (new)

SP change

RSP Input

Preset ramp-rate

Time

The following figure shows an example in which the ramp-up rate is set to 70 (°C/minute) and the CX1000 is operating at SP 1 = 500 °C and a switch is made to SP 2 = 640 °C.

SP 2 = 640°C

SP1 = 500°C

In addition to the value specified on the CX1000, the value determined from the analog signal that is input to the RSP terminal of the control input terminal block can be used as the SP. The input setting for the remote input analog signal is carried out in the same fashion as the input setting for the PV input (see remote input, select [REMOTE] through the local/remote switching operation on the operation display. The switching operation can also be carried out using the contact input (see

“Contact Input/Output Related Settings”

Note

SP 1

SP switching

SP 1

Temperature difference: 140°C

Preset ramp-rate

Time

SP switching

SP 2

Temperature rise time: 2 minutes

section 1.4, “PV Input Related Settings”

Preset ramp-rate

Time

Power-up or manual/auto switching

70°C/minute

). When using the SP of the

section 1.5,

The remote input function can be used only when program control is not used. To use this function, the program control ON/OFF setting (setting available only on models with the program control option) must be set to [OFF] and “[Basic Control Settings] > [Contact Input Registration] > [Remote Input Selection]” must be set to [REMOTE].

1-26 IM 04L31A01-03E

1.7 PID Parameter Settings

PID Number

PID parameter group number. The PID number can be set for each loop. When the PID group number setting is “8”, you can select the PID number from 1 through 8. However, if the PID group number is set to a smaller number, the maximum selectable PID number is decreased accordingly.

Note

• The parameters that are registered to a single PID number include the PID constant, output lower/upper limit, control action method, preset output value, shutdown function ON/OFF, and manual reset value.

• In the zone PID method, a single PID number is assigned to each zone (zone specified by reference points 5 and 6 is assigned a PID number of 6, for example). When the zone changes, the parameter switches to the control parameters assigned to the PID number, and the output is controlled accordingly.

PID Number Assignment

The PID number assignment operation varies depending on the PID selection method.

• When using the target setpoint selection method The SP number and PID number are synchronized. By switching the SP number, the control parameters (“PID parameters” in the settings) such as the SP and the PID constant are changed to the control parameters registered to the corresponding PID number.

• When using the zone PID method PID numbers are assigned to each zone beforehand. When the PV changes and becomes a value of a different zone, the output is controlled automatically using the PID parameters of the PID number that is assigned to that zone. The following settings are required when using this method.

Reference Points

As shown in the following figure, reference points 1 to 6 (up to 7 zones) are specified to divide the measurement span into zones. The number of reference points that can be specified is “PID group number – 2.” As shown in the following figure, if the PID group number is 7, the number of reference points is 5. If the number of reference points is 5, there are 6 zones.

Maximum value of

measurement span

Reference point 6

Reference point 5

Reference point 4

Reference point 3 Reference point 2

Reference point 1

Minimum value of

measurement span

If the current PV is here, PID constant of PID No. 5 is used for control.

Change in the PV.

Explanation of Functions

No.7 PID

No.6 PID

No.5 PID

No.4 PID

No.3 PID

No.2 PID

No.1 PID

IM 04L31A01-03E

Switching Hysteresis

You can set the hysteresis used in the zone switching in EUS (0.0% to 10.0%) of the measurement span. The hysteresis is initially set to 0.5% of the measurement span.

Reference

point 1

No.1PID

No.2PID No.1PID

Hysteresis width

No.2PID

1-27

1.7 PID Parameter Settings

Maximum value of measurement span

Reference point 2

Reference point 1

Minimum value of measurement span

PID Constant

Control Output Limiter

Reference Deviation

During control operation, the operation can be switched automatically to a preset PID constant (PID constant with the largest PID number. For example, if the PID group number is 8, the PID constant of PID number 8.) when the deviation between the SP and the PV exceeds the “reference deviation” setting. For example, when the deviation is large, you can increase the proportional gain (decrease the proportional band) to make the output reach the SP quickly. The switching of the PID constant by the reference deviation has precedence over the switching of the PID constant by the zone PID. When the actual deviation becomes smaller than the “reference deviation” setting, the CX1000 returns to the operation using the PID constant assigned to the zone corresponding to the PV at that point.

Reference deviation value

If the PID group number is 8 and the PV exceeds the reference deviation value, the operation switches to the PID constant of PID number 8 regardless of the zone.

No.1 PID

No.2 PID No.8 PID

Proportional Band (P)

The proportional band is specified in the range of 0.1 to 999.9% of the measurement span.

Integral Time (I)

The integral time is set in the range of 0 to 6000 s.

Derivative Time (D)

The derivative time is set in the range of 0 to 6000 s.

The control output limiter is a function that allows the upper and lower limits of the operation range of the control output (output limiter) regardless of operation mode. Selectable range of upper/lower limits: –5.0% to 105.0% (where upper limit > lower limit)

105.0%

Upper limit of output

Actual output from the terminal

Actual output

Lower limit of output

Variable range

Lower limit of limiter Upper limit of limiter

–5.0% 105.0%

Original variable range

Selectable range: –5.0% ≤ lower limit of limiter < Upper limit of limiter ≤ 105.0%

change range

1-28 IM 04L31A01-03E

1.7 PID Parameter Settings

Shutdown Function ON/FF (can be specified only during manual mode using 4- to 20mA current output)

The shutdown function closes the control value fully (set the output to 0) exceeding the dead band of the control valve positioner. When this function is turned ON, the control output is set to 0 mA if the manual control output becomes –5.0%.

Manipulated

output

20.0 mA

–5.0%

4.0 mA

3.2 mA

0.0 mA

100.0%

Output display value

Note

The “output high-limit alarm” is not activated even if the control output becomes 0 mA due to shutdown.

Manual Reset Value (valid only when the integral action is Off)

The manual reset value is the output value when the PV is equal to the SP. For example, if the manual reset value is set to 50%, the output value is set to 50% when PV = SP. Selectable range of manual reset value: –5.0 to 105.0%

Explanation of Functions

Control Direction

Condition

ON/OFF output

Current output

PV time-proportional output

Output change direction for the 4-20 mA case

The control action direction defines the direction (increase or decrease) in which the control output value changes according to the polarity of the deviation between the SP and the PV. In reverse action (factory default setting), the control output value decreases when the PV is greater than the SP and vice versa. The control output is varied using direct control or reverse control specified beforehand in sync with the deviation between the SP and the PV at that point. Direct action and reverse action can be switched in the middle of operation.

Reverse action Direct action

PV>SP

OFF

Current decrease

ON time decrease

20 mA

(Increase)

↑

Output

value

↓

(Decrease)

4mA

Minimum value

(PV is low)

PV<SP

Current increase

ON time increase

Maximum value

(PV is high)

PV>SP

Current increase

ON time increase

20 mA

(Increase)

↑

Output

value

↓

(Decrease)

4mA

Minimum value

(PV is low)

PV<SP

OFF

Current decrease

ON time decrease

Maximum value

(PV is high)

IM 04L31A01-03E

1-29

1.7 PID Parameter Settings

Preset Output

The preset output function outputs a constant value (preset output value) independently from the control output value present up to that point when the following conditions occur.

• When an input burnout occurs during operation in auto mode or cascade mode.

• When a failure occurs in the A/D converter during operation in auto mode or cascade

mode.

• When the operation of the CX1000 is switched from run to stop. The initial preset output value is set to 0.0%. However, the preset output value can be set to a value in the range of –5.0 to 105.0% regardless of the high and low limits of the output limiter.

Note

When setting (changing) the preset output value, presume the case when the preset output is actually used, check the appropriate output value, and set the value. After confirmation, change the preset output only when it is necessary.

1-30 IM 04L31A01-03E

1.8 Control Output Suppression Settings

Anti-Reset Windup (Over-Integration Prevention)

There are certain cases in which a large deviation between the SP and PV is present for an extended time such as when control operation is started. In such cases, the control output may reach the high limit of the output limiter and become saturated due to the integral action. In the end, an overshoot may occur. To prevent this from happening, the anti-reset windup function is used to pause the integral action when the manipulated output reaches the high limit of the output limiter.

100%

Upper limit of the

output limiter

Stop PID

computation

Output

value

Start PID

computation

Explanation of Functions

The function can be set automatically or manually. When manually setting the function, the point at which the integral computation is resumed is set in terms of a deviation width (%). The deviation width is derived using the following equation. Deviation width (%) = |PV – SP|/proportional band × 100 Selectable range of deviation width: 50.0 to 200.0%

Control Output Suppression

You can use the overshoot suppressing function that uses fuzzy logic. The overshoot suppression function works only during PID control when all PID constants are specified. When the overshoot suppression function is used, the deviation is monitored to detect the danger of overshooting. If danger is detected, the SP is automatically changed to a slightly lower tentative value referred to as the “auxiliary SP”, and the control continues. Then, when the PV enters a range in which overshooting is no longer a danger, the auxiliary SP is gradually returned to the original SP. The following cases are examples in which this function is effective.

• When you wish to suppress overshooting.

• When you wish to shorten the rise time.

• When load fluctuation is frequent

• When the setpoint is changed frequently.

Original SP

Auxiliary SP

→Time

IM 04L31A01-03E

Control output suppression function ON

Time

Start fuzzy logic

1-31

1.8 Control Output Suppression Settings

Output Velocity Limiter

This function is used to prevent radical changes in the control output to protect the control element and object of control. Since this function negates the derivative action, use caution when using this function on derivative type control. Selectable range of velocity: 0.1 or 100.0%/s

1-32 IM 04L31A01-03E

1.9 Settings for ON/OFF Control

Target Setpoint

The target setpoint (SP) is set on the PID Parameter setting display (see (0.0 to 100.0% of the measurement span) in the same fashion as the PID control. On the PID parameter setting display, you select a PID number in the range of 1 to 8 and register one SP for each PID parameter as with other parameters. However, in ON/OFF control, the PID number functions as a SP number.

Relay Hysteresis

In ON/OFF control output, you can set hysteresis to prevent chattering. The hysteresis is set using the setpoint (0.0 to 100.0%) and the hysteresis activation position (center, low limit, and high limit).

When the activation position setting is “Center”

page 4-23

Explanation of Functions

) in EU

Output

OFF

ON/OFF action point

(Target setpoint)

Hysteresis

Settings of Other Control Parameters

The following control parameters are common with PID control.

• Control action direction

• Preset output

• Control alarm mode

• SP tracking

• PV tracking

• Setpoint limiter

• Target setpoint ramp-rate setting

Switching Control Parameters by PV Zones

When Zone PID is turned ON, the following control parameters can be switched according to the specified PV zones. Like in the case with PID control, reference points 1 to 6 (up to 7 zones) for setting the zones correspond to the SP number (1 to 7, PID number on the setting display).

• Relay hysteresis

• Control action direction

• Preset output

Process value

Control Mode Selection

IM 04L31A01-03E

ON/OFF control output also allows single-loop control, cascade control, and loop control with PV switching. However, for cascade control, the secondary output is ON/OFF control output, but the primary output is the computed result obtained by the PID constant that is assigned to the primary loop. Therefore, a PID constant is assigned to the parameter of the PID number assigned to the primary loop.

1-33

1.10 Control Alarm Related Settings

Alarm Operating Conditions (Alarm Mode)

The following three types of alarm operating conditions are available for selection.

• Alarm is always enabled ← initial value

• Alarm is disabled when operation is stopped.

• Alarm is disabled when operation is stopped or during manual (MAN) operation mode.

Alarm Type

You can select the alarm type from the following.

Alarm type Alarm type

PV high-limit

(Open/close: relay contact status)

Alarm action

Hysteresis

Open

Alarm

setpoint

Deviation within high & low limits

(Open/close: relay contact status)

Deviation

setpoint

Alarm action

Hysteresis Hysteresis

OpenOpen

PV low-limit

Deviation high-limit

Deviation low-limit

Deviation high & low limit

Open

Deviation setpoint

Hysteresis Hysteresis

Close Open Close

Deviation setpoint

Action When an Alarm Occurs

Alarms can be generated at the contact output and on the CX1000 display. The alarm contact output can be assigned to the [DIGITAL OUT] terminal (see of the control output terminal block. The alarm display can be confirmed by the mark on the control group displays, alarm occurrence history on the alarm summary display, and the alarm icon on the operation status display section.

Hysteresis

Alarm

setpoint

Hysteresis

Open

Deviation setpoint

Open

SP high-limit

SP low-limit

Output high-limit

Output low-limit

Hysteresis

Alarm setpointSetpoint

Hysteresis

Alarm setpoint Setpoint

Hysteresis

value

Alarm setpoint

Alarm setpointOutput

Hysteresis

Output

value

page 2-6

)

Note

You cannot assign the control alarm output to the [ALARM] terminal of the measurement alarm option terminal block.

1-34 IM 04L31A01-03E

Control Alarm Related Settings

Setting the Alarm Value

An alarm is registered for each SP of a single control loop. If the SP number (1 to 8) is switched, the alarm value switches accordingly. Since up to 4 alarm types can be assigned for each control loop, four alarm values can be assigned per SP number. You can set the alarm value in the following range. PV high/low limits, SP high/low limits: EU (0 to 100%) of the measurement span. Deviation high/low limits: EUS (–100 to 100%) of the measurement span. Deviation high & low limit, deviation within high & low limits: EUS (0 to 100%) of the measurement span Output high/low limit: –5.0 to 105.0%

Note

Alarm Stand-by Action

When the PV input reaches the SP at the initial stages of control operation, you can put the alarm output on standby.

Power up

The alarm number corresponds to the SP number. If you change the SP number, the alarm switches to the value of the corresponding alarm number.

Normal

handling

Normal Failure

Alarm output

Alarm is not output during this period even if thePV is below the alarm lower limit.

Hysteresis

Alarm lower limit value

Time

Explanation of Functions

Alarm Hysteresis

Open Open

The alarm hysteresis can be set in the range of EUS (0.0% to 10.0%) of the measurement span. Below is an example of setting the hysteresis of alarm 1 when the alarm 1 type is set to PV high limit. Open and close in the figure indicate the relay contact status. If the alarm switching (ON/OFF) is excessive, the alarm hysteresis can be widened to lessen the excessiveness. In the right figure, the switching of the alarm (ON/OFF) is slow because the hysteresis width has been widened.

HY1: 15.0°C (example)HY1: 5.0°C (example)

Close (ON)Close (ON)

AL 1 setpoint: 100.0°C (example)

Alarm ON

OFF

AL 1 setpoint: 100.0°C (example)

Alarm ON

IM 04L31A01-03E

OFF

TimeTime

1-35

1.11 Program Control Related Settings

Selecting the PID Selection Method (basic setting of control action)

When program control is turned ON, select segment PID method (zone PID selection OFF) or zone PID method.

• Segment PID method

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

Segment PID method is a function in which the PID setpoint is switched for each segment according to the program pattern setting during program operation. Therefore, this method is suitable for control in which the PID constant is changed during ramp-up and ramp-down in the same PV region.

If the current operation is at the 5th segment, the PID constant of No. 1 is used.

1000.0

Process

value

500.0

0.0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7

No.2PID

• Zone PID method Zone PID method is a function in which the PID setpoint is automatically switched according to the PV. Therefore, the same PID constant is used in the same PV region regardless of the ramp-up and ramp-down program operation. This method is used on equipment such as reactors in which the chemical reaction gain varies depending on the temperature. As shown in the following figure, the measurement span can be divided into up to 7 zones using reference points 1 to 6. An optimum PID constant can be assigned to each zone. Therefore, even if the PV changes and crosses between the zones, the output is controlled automatically using the PID constant that is assigned to each zone.

If the current process value (PV) here, control using the PID constant of No. 6.

Maximum value of PV span

Reference point 6

Reference point 5

Reference point 4

Reference point 3 Reference point 2

Reference point 1

Minimum value of PV span

No.1PID No.3PID

No.7PID

No.6PID

No.5PID

No.4PID

No.3PID

No.2PID

No.1PID

Change in the process value (PV)

1-36 IM 04L31A01-03E

1.11 Program Control Related Settings

Program Pattern Number and Pattern Name (Initial Pattern Value)

From the multiple program patterns available, you can switch the program pattern used in the operation by specifying a number according to the conditions. Each program pattern can be assigned a pattern name. Program pattern number: 1 to 30 (the maximum number of program patterns that can be specified is 30). Pattern name: Up to 16 characters.

Number of Segments Used (Initial Pattern Value)

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

The selectable number of segments is as follows:

• Number of segments that can be assigned to a single program: 1 to 99.

• Total number of segments constructing all program patterns: 300 max.

Segment Assignment Method (Initial Pattern Value)

The following two types of segment assignment methods are available for selection.

• Segment time assignment method (factory default setting) This method sets the action inside the segment using the final SP (control setpoint at the end of the segment) and the segment time (time length from the start of the segment to the end). Selectable range of final SP: Within the control measurement span (within PV range span during loop control with PV switching). Selectable range of segment time: 00:00:01 to 99:59:59.

Operation of

segment n

Final SP of the

previous segment

(Starting SP at the time

of program operation start)

Segment time

• Segment time ramp-rate assignment method

This method sets the action within the segment using the final SP and the ramp-rate value. The ramp-rate value for ramp-up or ramp-down (target setpoint change) is the ramp-rate per 1 hour or 1 minute. For calculating the ramp-rate, the span of the loop with the smallest number in the program operation is used. The segment time during ramping is the maximum time in the specified loops. Selectable range of ramp-rate during ramping: Within the control measurement span (within PV range span during loop control with PV switching). The segment time during soaking (the setpoint is constant) is the time length of the segment. Selectable range of segment time during soaking: 00:00:01 to 99:59:59.

During ramp-up

Operation of

segment n

n = 1 to 99

Final SP

Time

n = 1 to 99

Final SP

Explanation of Functions

IM 04L31A01-03E

Final SP of the

previous segment

(Starting SP at thetime

of program operation start)

The segment assignment method applies to all segments constructing the program pattern. Note that the contents of all program patterns created before are cleared when the segment assignment method is changed.

1min or 1h

Ramp-rate setting

Time

1-37

1.11 Program Control Related Settings

Selecting the Start Condition for Program Operation (Basic Program Settings)

The following four operation start conditions (start codes) are available for selection.

• Starting SP start (initial value).

• Ramp-prioritized PV1 start

• Time-prioritized PV start

• Ramp-prioritized PV2/3/4/5/6 start

Starting Target Setpoint Start

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

The starting SP is the SP at the start of the program operation. When set to starting SP start, the SP is changed from the starting SP to the final SP. In this case, the change follows the ramp-rate defined by “(final SP – starting SP)/segment time” regardless of the PV. When segment time ramp-rate assignment method is selected, the change follows the specified ramp-rate.

SEG1

SEG2

TSPn: Final SP SSPn: Starting SP

Program pattern for the 2nd loop

Program pattern for the 1st loop

Time

SSP2

SSP1

TSP2

TSP1

Segment time

Ramp-prioritized PV Start

In ramp-prioritized PV start, the program operation is started by specifying one of the process values (PV1 to PV6) of loops 1 to 6. The patterns of other unspecified patterns start according to the PV start pattern of the specified loop. The start point varies depending on the comparison between the starting PV of the specified loop and the SP specified by the program pattern. The section of the program pattern that is compared is from the starting SP to the first soak point or the first ramp-down start point. The start point is the point at which the starting PV value and the setpoint on the program pattern match. If this matching point is not found, the start point is the end point of the program pattern being compared against. If the segment consists of only an up ramp and the starting PV is greater than the final SP, the program operation will start. If the start segment is a soak, this function does not operate, and the start condition is the same as with the starting SP start. Below are examples of ramp-prioritized PV1 start and ramp-prioritized PV2 start.

• Example in which the 2 When set to ramp-prioritized PV1 start, the ramp-rate of the 1

segment of the 1st loop is a soak segment

loop is prioritized. The program operation start point of the 1st loop will be point C1, D1, or E1 (depends on the PV position a to e at that point). The program operation start point of the 2nd loop (one of the other loops) is at the same time as that of the 1

loop. For example, if the program operation start point of the 1st loop is point C1, the program operation start point of the 2nd loop is point C2.

SEG1

SEG2 SEG3 SEG4 SEG5

Program pattern for the 1st loop

Program pattern for the 2nd loop

Time

1-38 IM 04L31A01-03E

1.11 Program Control Related Settings

• Example in which the 3rd segment of the 2nd loop is a soak segment

When set to ramp-prioritized PV2 start, the ramp-rate of the 2 The program operation start point of the 2

loop will be one of the points from A2 to

loop is prioritized.

E2 (depends on the PV position a to e at that point). The program operation start

point of the 1 For example, if the program operation start point of the 2

loop (one of the other loops) is at the same time as that of the 2nd loop.

loop is point A2, the

program operation start point of the 1st loop is point A1.

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

SEG1

A1B1

SEG2 SEG3 SEG4

Program pattern for the 2nd loop

Program pattern for the 1st loop

Time

• Example in which the segment consistS of only aN up ramp When set to ramp-prioritized PV1 start, the ramp-rate of the 1

loop is prioritized. The program operation start point of the 1st loop will be one of the points from B1 to E1 (depends on the PV position a to e at that point. If the PV position is at point a, program operation will not start). The program operation start point of the 2 (one of the other loops) must be at the same time as that of the 1st loop. For example, if the program operation start point of the 1st loop is point B1, the program operation start point of the 2

loop is point B2.

Explanation of Functions

loop

IM 04L31A01-03E

SEG1

SEG2

Program pattern for the 1st loop

Program pattern for the 2nd loop

Time

1-39

1.11 Program Control Related Settings

Time-prioritized PV Start

Program operation is started by prioritizing the segment time to change the SP from the PV at the start of program operation to the final SP of the 1

segment. The ten-segment linearizer ramp is defined by “(final SP – PV)/segment time.” When the 1st segment is a soak segment, the start condition is the same as with the starting target setpoint start.

• Example in which the 2

segment is a soak segment

The program operation start point of the 1st loop is always one of the points from point a

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

to e. Since the program operation start point of the 2nd loop is at the same time as that

of the 1

loop, the program operation start point is one of the points point a2 to e2.

SEG1

TSP1

TSP2

SEG2 SEG3 SEG4 SEG5

TSPn: Final SP

Program pattern for the 1st loop

Program pattern for the 2nd loop

Time

Switching Conditions of Program Segments (program operation related setting)

The operating conditions related to the switching of the segments can be specified for each segment. Such conditions include the condition for switching to the next segment and the operating conditions within the segment. The following three conditions for switching the segment are available.

• Switching for continuation (initial value)

• Hold-on switching

• Local-mode end

Switching for Continuation

When the segment set to switching for continuation ends, the next segment is executed. When switching for continuation is specified on the last segment, the program operation stops (reset) after executing the program operation. After the last segment ends, the setpoint is set to the starting SP. Below is an example of segment switching for continuation.

SEG.n SEG.n + 1

When SEG.n ends, the operation continues to the next segment (SEG.n + 1).

n = 1 to 98

Final SP of segment n

Time

TIMEn

TIMEn + 1

1-40 IM 04L31A01-03E

1.11 Program Control Related Settings

Hold-on Switching

When a segment set to hold-on switching ends, the program operation is paused (hold operation). The hold condition continues until the hold operation mode is cleared through key operation or an external contact. If the hold operation mode is cleared at the last segment, the program operation is stopped (reset). If you execute advance during hold operation, the hold is cleared. Below is an example of segment hold-on switching.

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

SEG.n

TIMEn

In hold

The hold mode continues until it is cleared.

SEG. n + 1

n = 1 to 98

When the segment (SEG.n) to which hold switching has been assigned ends, the program operation is paused (hold operation).

Time

TIME

n + 1

Local-Mode End

When local-mode end is selected, the operation is set to local mode (constant SP) after the last segment of program operation ends. The SP that is used varies depending on the ON/OFF condition of target setpoint tracking as follows. In addition, when the operation enters local mode, PV event and time event are turned OFF.

• When the target setpoint tracking is ON When the program operation of the last segment ends, the operation is set to local mode (constant SP). At this point, the final SP of the last segment is used continuously as the SP in local mode. The “local SP” can be specified beforehand. However, if the target setpoint tracking is ON, the PV tracks to the final SP of the final segment regardless of the local SP.

Program

operation

Local

operation

Explanation of Functions

IM 04L31A01-03E

Last segment

SEG.n

Time event

EVn

n = 1 to 99

Local SP

After the last segment ends, the local SP is set to the final SP of the last segment regardless of the "local SP" specified beforehand, and the operation continues under fixed-point control.

Time

1-41

1.11 Program Control Related Settings

• When the target setpoint tracking is OFF When the program operation of the last segment ends, the operation is set to local mode (constant SP). At this point, the output is controlled using the preset “local SP,” and PV event and time event are turned OFF.

Program

operation

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

Last segment

SEG.n

Time event

EVn

Local

operation

n = 1 to 99

After the last segment ends, the operation continues under fixed-point control using the "local SP" specified beforehand.

Local SP

Time

Wait Operation

This function is used to pause the program operation when the PV cannot track the SP. The program is paused to stop the change in the SP and waits for the PV to track the SP. When the PV tracks the SP, the program operation is automatically resumed. This function has the following two types of operation.

• Wait at the time of segment switching

• Wait within the segment

The operation is set using the wait zone, which is the deviation width used to determine the tracking level of the PV input, and the wait time, which is the time until the wait zone is reached. Up to 5 groups of wait zone and wait time combination can be specified.

Wait at the Time of Segment Switching

Wait at the time of segment switching is the wait operation that is performed when the PV has not reached the final SP before changing to the next segment. If the PV reaches the wait zone within the wait time, the operation moves to the next segment at that point. If the PV does not reach the wait zone within the wait time, the operation moves to the next segment after the wait time elapses.

• Operation when the PV reaches the wait zone within the wait time If the PV reaches the wait zone of the final SP before the wait time elapses after the wait operation is started, the operation switches from wait mode to run mode and transits to the next segment. The timer related to the execution of the program pattern is stopped during wait operation. Thus, the time event value is retained.

SEG.n + 1 n = 1 to 98

Wait zone Wait zone

Final SP

SEG.n

Timer

stopped

EVn EVn + 1

Wait time

Transits to the next segment (SEG.n + 1) when the wait zone is reached.

1-42 IM 04L31A01-03E

1.11 Program Control Related Settings

• Operation when the PV does not reach the wait zone within the wait time If the wait time elapses before the PV reaches the wait zone, the operation switches from wait mode to run mode at that point (even if the PV has not reached the final SP) and transits to the next segment. However, if the wait time is set to “0” (OFF), the wait operation continues until the PV reaches the wait zone.

SEG.n SEG.n + 1

Final SP

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

Timer

Wait within the Segment

If the PV falls outside the wait zone specified with respect to the current SP when the program operation is within the segment, the operation enters wait mode and the program operation is delayed. The function applies to each loop. Therefore, when the PV of any single loop does not reach the wait zone, the operation enters wait mode. When the PV returns within the wait zone, the operation switches from wait mode to run mode and the program operation is resumed.

stopped

EVn EVn + 1

Wait time

Segment n

The PV has not reached the wait zone, but the program transits to the next segment when the waittime has elapsed.

n = 1 to 98

Wait zone Wait zone

Explanation of Functions

Original SP

Wait period

Wait zone

IM 04L31A01-03E

1-43

1.11 Program Control Related Settings

Event Output

This function is used to output an alarm at a preset point in time or turn ON the contact output after a given time elapses. The function operates in sync with the progression of the program operation. The event action operates at the start time of the segment to which the event action is assigned. There are two types of event actions: time event and PV event.

• Number of time events/PV events that can be assigned to a single segment: 16 each.

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

• Total number of events that can be assigned (total of all patterns): 800

Time Event

Time event is a function used to turn ON the contact output after a specified time elapses by starting the clock from the time the segment operation is started. The ON time and OFF time are specified in terms of the time elapsed from the start point of the specified segment. You can specify the time and activate the event outside the specified segment.

SEG4SEG3SEG2

Program pattern for the 1st loop

ON time OFF time

Time event 1

Time event 2

Time event 3

SEG1 SEG5

Program pattern for

the 2nd loop

TSP2

TSP1

TSPn: Final SP

ON time OFF time

Note

The event information of the time event is retained even after the segment to which the time event is assigned.

1-44 IM 04L31A01-03E

1.11 Program Control Related Settings

PV Event

This function outputs preset alarms such as PV alarms and deviation alarms during program operation. PV events operate only within the specified segment. The following table shows the types of PV events. Hysteresis can be specified for each event.

Open

Process

value

Open

Deviation setpoint

Relay action

Hysteresis

Alarm

setpoint

Hysteresis

setpoint

Hysteresis

Deviation setpoint

Hysteresis

Open

PVAlarm

Deviation within high & low limits

SP high-limit

SP low- limit

Output high-limit

(Open/close: relay contact status)

Hysteresis

Deviation setpoint

Output value

Event type Event type

(Open/close: relay contact status)

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

PV high-limit

PV low-limit

Deviation

high-imit

Deviation

low-limit

Relay action

Hysteresis

Setpoint

Alarm setpoint Setpoint

Alarm

setpoint

Hysteresis

Alarm

setpoint

Explanation of Functions

OpenOpen

Deviation

high & low

limit

Note

Hysteresis Hysteresis

Close Open Close

Deviation setpoint

The setup conditions of PV events are reset at the time the operation of the specified program segment ends.

Output low-limit

Hysteresis

Alarm

setpoint

Output value

IM 04L31A01-03E

1-45

1.11 Program Control Related Settings

Repeat Function

This function repeats the operation over a section of the program pattern consisting of continuous segments. To perform repeat operation, you specify the repeat start segment, repeat end segment, and the number of repetitions (repeat count). Below is a program pattern in which the repeat count = 1, repeat start segment number = 3, and repeat end segment number = 5.

SEG4 SEG6SEG5SEG3SEG5SEG4SEG3SEG2SEG1

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

Program pattern for

the 2nd loop

TSP2

TSP1

TSPn: Final target setpoint

Note

• Only a single repeat function can be specified for each program pattern.

• Set the first SP of the repeat start segment the same as the last SP of the repeat end

segment. If they do not match, the start segment pattern will be affected.

• The settings related to the time event output operation of the repeated segments are initialized at the start of the repeat function. Therefore, reassign the time event output operation that is required within the section over which the operation is repeated. The settings related to PV events are valid within the specified segment. If necessary, assign the PV events for each segment. If “time-prioritized PV start” or “ramp-prioritized PV start” is specified as a starting condition of the program operation, PV start is also performed when repeat operation is started.

Program Operation Start Delay

You can set a delay (program start time) in starting the actual program operation after carrying out the procedure for starting the program operation. The setting is common to all loops. Selectable range of program start time: 00:00:00 to 99:59:59

Process value

Program pattern for the 1st loop

Repeat start

segment number = 3

Target

setpoint

Same value

Repeat period: repeat count = 1

Repeat end

segment number = 5

Delay

Program operation starts

Time

Program start

operation

Delay elapses

1-46 IM 04L31A01-03E

SEG4SEG3

SEG2

SEG1

SEG5

Time

Start program operation from segment 3

Process value

Segment time of segment 3

When set to ramp-prioritized PV1 start

When set to time-prioritized

PV start

Current process value

When set to starting target setpoint start

1.11 Program Control Related Settings

Specifying the Start Segment at the Time Program Operation Is Started

You can specify the start segment number that is used at the time program operation is started. For example, this function can be used when you wish to set the program currently in operation back to the previous segment and restart the operation. Below is an example in which the operation is started from segment 3.

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

If the program operation is started from segment 3, the program operation starts according to the start conditions as follows.

• When set to starting SP start The program operates using point A as the starting SP and progresses towards point C.

• When set to ramp-prioritized PV1 start The program progresses from point B to point C.

• When set to time-prioritized PV start Program operates from the current PV using the segment time of segment 3 and progresses toward point C.

Hold Operation

You can hold the program progression (stop the timer) during program operation. You can hold the program using key operation on the program operation status display, using the external contact input, or through the communication function. While the program operation is in hold mode, you can temporarily change the settings for the current segment. When hold mode is cleared, the operation continues with the new settings. The settings that can be changed temporarily are indicated below. Temporarily means that the changes take effect in the operation of the current segment, but the setting itself is not changed. However, if the segment indicated in bold is a ramp segment and the segment time ramp setting method is used, you cannot change only the segment time. If you change the final SP, the segment time changes accordingly.

• Change the final SP of the segment.

• Increase or decrease the segment time.

When changing the SP of the segment

You can change the SP during the hold operation. The ON/OFF time of the time event and the segment time is adjusted by the amount of time the operation is held.

SEG1 SEG2 SEG3 SEG4

Pattern after the

setpoint is changed

Target SP

changed

SEG5

Explanation of Functions

IM 04L31A01-03E

Time event

OFF

Final SP

Hold period

(Timer stopped)

Pattern before the setpoint is changed

Delay for the amount of time the timer was stopped

1-47

1.11 Program Control Related Settings

When increasing or decreasing the segment time

You can increase or decrease the segment time during the hold operation. If the segment time is increased or decreased during the hold operation, the ON/OFF time and segment time is automatically adjusted by the amount of time the operation is held and the amount of time the segment time is increased or decreased.

• Example in which the segment time is increased

SEG1 SEG2 SEG5SEG4SEG3

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

Pattern before the remaining segment time is increased

Final SP

Pattern after the remaining segment time is increased

Time event

• Example in which the segment time is decreased

OFF

Hold period

(Timer stopped)

SEG1 SEG2 SEG5SEG4SEG3

Pattern when the remaining

segment time is decreased

Delay for the amount of time the timer was stopped

Increase the remaining segment time

Final SP

Pattern before the remaining segment time is decreased

The time event also decreases by the amount the remaining segment time was decreased.

Time event

OFF

Decrease the remaining segment time

Delay for the amount of time the timer was stopped

Hold period

(Timer stopped)

1-48 IM 04L31A01-03E

1.11 Program Control Related Settings

Advancing Segments

During program operation, you can force the program to advance to the next segment. You can advance the program using key operation on the program operation status display, using the external contact input, or through the communication function. When you advance the program at the segment currently in operation, the program advances to the next segment. However, depending on the segment at which this function is executed, the following operation may take place.

This function cannot be used on the current version of the CX1000.

The infomation given here may change in the future.

• When advance is executed at the last segment The program operates according to the switching settings of the segment. If localmode end is selected, the operation enters local mode. If switching for continuation or hold-on switching is selected, the operation enters reset mode (operation stop).

• When advance is executed at the repeat end segment Repeat operation is started.

• When advance is executed at a segment other than those described above The program advances to the next segment regardless of the segment switching settings.

• When advance is executed when the program operation is on hold The hold mode is cleared, and the program operates according to the segment conditions described above.

Explanation of Functions

IM 04L31A01-03E

1-49

1.12 Tuning

Selecting Tuning Parameters

Up to 21 tuning parameters can be shown on the tuning display. The parameters are initially assigned as shown below. The name of the tuning parameters (such as SP) can be changed using up to 6 characters. In addition to the tuning parameters below, [DR] (control direction) and [H] (relay hysteresis) are available.

SP (target setpoint) D (derivative time) A1 (alarm 1 setpoint) OH (High limit of the output limiter) A2 (alarm 2 setpoint) OL (Low limit of the output limiter) A3 (alarm 3 setpoint) MR (manual reset) A4 (alarm 4 setpoint) PO (preset output) P (proportional band) I (integral time)

Manual Tuning Operation

On the tuning display as shown below, you can select the parameter you wish to tune using the arrow keys and change the value.

Auto Tuning the PID Constant

On the tuning display, select the PID number you wish to auto-tune and execute auto tuning.

1-50 IM 04L31A01-03E

Setpoint

Process

value

Control

output

Auto tuning on

PID control according to the PID control determined by auto tuning

Auto tuning ends

on the third hump.

Auto tuning in progress

OFF OFF

ON ONON

Time

1.11 Program Control Related Settings

Auto Tuning

Auto tuning is a function that automatically measures the process characteristics and automatically sets the optimum PID constant. When auto tuning is executed, the control ouput is temporarily turned ON/OFF step-wise (see the following figure). From the hunting period and amplitude of the PV that is generated, the optimum PID constant is calculated and set. This method is called the limit cycle method. Auto-tuning is allowed only during auto operation under PID control. In addition, for cascade control, auto tuning on the primary loop is possible only when cascade operation is in progress.

Target Setpoint during Auto Tuning Execution (Auto Tuning Point)

The auto tuning point is limited in the range of 3 to 97% of the measurement span.

• Auto tuning execution during program operation

The optimum PID constant for the SP that the segment in execution is using is determined. The auto tuning point in this case is the SP that exists at the start of auto tuning. For the secondary loop of cascade control, the tuning point is the SP of

the SP number corresponding to the specified PID number.

• Auto tuning execution during the zone PID method

When auto tuning is executed for all groups, the midpoint of each reference point pairs is used as the auto tuning point. For reference deviation, auto tuning is performed at 50% of the measurement span.

Explanation of Functions

IM 04L31A01-03E

1-51

1.13 Measurement Function Overview

Measurement Input

DC voltage, thermocouple, resistance temperature detector, or ON/OFF signal (contact signal or voltage signal) can be measured. The input signal is A/D-converted at a scan interval of 1 s or 2 s and acquired to the internal memory. In addition, difference computation, square-root computation, and scaling can be carried out on the measured data and acquired to the internal memory.

Displaying the Measured Data

The measured data acquired to the internal memory can be displayed on the operation display using trend waveforms, numeric values (digital values), or bar graphs.

Trend Display Digital Display

Bar Graph Display

Measurement Alarms

Alarms can be generated when the measured/computed data meets a certain condition. When an alarm occurs, information notifying the alarm occurrence is indicated on the operation display. In addition, a relay signal can be output from the alarm output terminal [ALARM] of the measurement alarm option terminal block and the relay contact output/transistor output terminal [DIGITAL OUT] of the control output terminal block. On the operation display, the alarm status is displayed as alarm icons in the status display section and using methods such as the trend, digital, bar graph, overview displays. The detailed information about the alarms is displayed in the alarm summary.

Alarm Indication Example on the Overview Display

Alarm type

Channel No. or tag name

Cursor

Measured/computed value

Area of channels on which an alarm is not occurring is indicated in green

Alarm icon

Area of channels on which an alarm is occurring is indicated in red

1-52 IM 04L31A01-03E

1.13 Measurement Function Overview

Saving Data

Alarm Summary Display Example

Number of the alarm information displayed on the bottom line

Number of the alarm information in the internal memory

Alarm occurrence channel (channel No. or tag)

Alarm No. (1, 2, 3, 4)/type (H, L, h, l, R, r, T, t)

Date and time when the alarm occurred

Mark

Cursor

Date and time when the alarm was released

The measured data can also be saved to external storage media such as floppy disks (2HD), Zip disks (100 MB), and ATA flash memory cards (4 to 440 MB).

External storage medium (One of the following types

CX1000

specified at the time of purchase)

Floppy disk

Zip disk

Explanation of Functions

The data that has been saved to an external storage medium can be displayed on a PC using the DAQSTANDARD for CX software that comes with the package. The data can also be loaded into the CX1000 to be displayed.

Communication Function

By using the Ethernet interface that comes standard with the CX1000, the data can be transferred to a server on a network (client function). The data stored on the CX1000’s external storage medium can also be read from a PC on the network (server function).

The communication functions using the Ethernet or serial interface are not covered in this manual. See the

17E)

Measured data

Server

Primary Secondary

CX1000/CX2000 Communication Interface User’s Manual (IM 04L31A01-

DISP/

ENTER

ATA flash memory card

Data on the external storage medium

IM 04L31A01-03E

1-53

1.14 Measurement Function > Measurement Input Related Settings

Integration Time of the A/D Converter

The CX1000 uses an A/D converter to convert the sampled analog signal to a digital signal. At this point, the sampled data is integrated for a certain period to eliminate the noise that is mixed in the input signal. You can select the integral time from [Auto]/ [50Hz(20ms)]/[60Hz(16.7ms)/100ms]. This setting applies not only to the measurement input of the measurement function but also to the PV input of the control function. By setting the integration time of the A/D converter to match the time period corresponding to one cycle of the power supply or an integer multiple of one cycle, the power supply frequency noise can be effectively eliminated. If [Auto] is selected, the recorder will automatically detect the power supply frequency and select 16.7 ms or 20 ms. Because 100 ms is an integer multiple of 16.7 ms and 20 ms, this setting can be used to eliminate the power frequency noise for either frequency, 50 Hz or 60 Hz.

Scan Interval

The scan interval is the interval used to sample the input signal. You can select [1s] or [2s]. However, if the integral time is set to [100ms], the scan interval is fixed to 2 s.

Note

When performing four arithmetic operations on models with the computation function (/M1), this scan interval is used to carry out the computation.

Input Type and Input Computation (Mode)

There are six channels of measurement input channels (measurement channels). You can select the type of signal input to each measurement channel from DC voltage, thermocouple, resistance temperature detector, and ON/OFF input (contact signal or voltage signal). In addition, difference computation, square-root computation, and scaling can be performed on the measured data and display or save the computed result as measured data. On the CX1000, the input type and input computation type is set as a [Mode]. In addition, if [Mode] is set to difference computation, square-root computation, or scaling, the input type is set as a [Type].

Mode Notation in Setup* Description

DC voltage Voltage Measures a DC voltage in the range of ±20 mV to ±50 V. Thermocouple TC Measures temperatures corresponding to the temperature range of each

Resistance RTD Measures temperatures corresponding to the temperature detector appropriate range for Pt100 or JPt100. Scaling Scale The input signal can be scaled to a value in the appropriate unit and displayed. You

Difference Delta Displays the value obtained by subtracting the measured value of another channel

ON/OFF input DI Displays the contact input or voltage input signals by correlating them to 0% or

Square root Sqrt Calculates the square root of the input signal and computation displays the result as the measured value of the channel. The computed

Skip Skip Disables the channel. * Characters displayed as selections in the [Mode] box of the setting display. It is used when setting the measurement channels.

thermocouple type such as R, S, B, K, E, J, T, N, and W.

can select the input type from DC voltage, thermocouple, resistance temperature detector, and ON/OFF input.

(called the reference channel) from the input signal of the specified channel as the measured value for the specified channel. You can select the input type from DC voltage, thermocouple, resistance temperature detector, and ON/OFF input.

100% of the display range. Contact input: Closed contact is ON (1).

Open contact is OFF (0).

Voltage input: Less than 2.4 V is OFF (0).

Greater than or equal to 2.4 V is ON (1)

result can also be scaled to a value in the appropriate unit and displayed. The input type is DC voltage only.

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1.14 Measurement Function > Measurement Input Related Settings

Note

• For current inputs, a shunt resistor is attached to the input terminal to convert the signal to voltage input. The following table shows the available shunt resistors. For example, a 250-Ω shunt resistor is used to convert the signal to 1 to 5 V for 4-20 mA input. Name Model Resistance Shunt resistor 4159 20 250 Ω ± 0.1% (for screw terminals) 4159 21 100 Ω ± 0.1%

• The square-root computation method of the CX1000 is indicated below.

max min

F = (F - F )

Meanings of the symbols are shown below. V

min

: span lower limit, V

max

: scale upper limit after conversion, Vx: input voltage, Fx: scaling value. If the value inside the root is negative, the computed result is displayed as follows. When F

min

< F

When F

min

> F

Input Range and Measurable Range

When the input type is set to DC voltage, thermocouple, resistance temperature detector, or ON/OFF input, you will select the range to match the input signal. For DC voltage, select the measurable range (select [20mV] for “–20.00 to 20.00 mV”). For thermocouple or resistance temperature detector, select the type. For example, the type selections for the thermocouple are [R], [S], [B], [K], [E], [J], [T], [N], [W], [L], [U], [PLATINEL], [PR40-20], and [W3Re/W25Re]. If [R] is selected, the measurable range is 0.0 °C to 176.0 °C. In addition, you will set the measurement span ([Span lower limit] and [Span high limit]) within the measurable range as the actual range for making measurements.

max max

4159 22 10 Ω ± 0.1%

V - V

x min

max

V - V

max

min

: span upper limit, F

: “–*****” : “+*****”

Explanation of Functions

min

: scale lower limit after conversion,

Burnout Detection

When measuring the temperature using a thermocouple, you can have the measurement result set to positive overrange*1 or negative overrange*2 when a burnout occurs. Burnout can be set on each measurement channel. The initial setting is set so that burnout is not detected.

*1 Positive overrange refers to the condition in which the input signal is exceeding the upper limit of

the measurable range of the input range. The measured value is show as “+*****”.

*2 Negative overrange refers to the condition in which the input signal is less than the lower limit of

the measurable range of the input range. The measured value is show as “–*****”.

Reference Junction Compensation

When measuring the temperature using a thermocouple, the reference junction compensation can be used. You can select whether to use the reference junction compensation provided by the CX1000 or an external reference junction compensation. If you are using an external reference junction compensation, you will also set the reference voltage. The initial setting is set so that the reference junction compensation provided by the CX1000 is used. When using the external reference junction compensation, set an appropriate reference junction compensation voltage. As in the example in the following figure, if the reference junction temperature for the external reference junction compensation is T thermoelectromotive force of the 0-°C reference for T compensation voltage.

CX1000

°C as the reference junction

External reference junction compensation (Hold the contact point of the thermocouple and copper wire at T0 °C)

Copper wire

Thermocouple

°C, set the

IM 04L31A01-03E

DISP/

ENTER

1-55

1.14 Measurement Function > Measurement Input Related Settings

Moving Average

The moving average is used to suppress the effects of noise that is riding on the signal. The input signal of the measurement channel is set to the averaged value of the m most current data points (the number of moving-averaged data points) acquired using the scan interval. The number of moving-averaged data points (m) can be set in the range 2 to 16. The figure below shows an example indicating the operation of the buffer for the moving average computation when the number of moving averaged data points is set to “5.” The moving average can be set on each channel. The moving average is initially turned OFF.

Buffer data for the nth sampling time

Buffer data for the n+1th sampling time

New data New data

Buffer data for the n+2th sampling time

Moving

average

10.0mV

5.0mV

0.0mV

–5.0mV

–10.0mV

0.0mV

Cleared

15.0mV

10.0mV

5.0mV

0.0mV

–5.0mV

5.0mV

10.0mV

15.0mV

10.0mV

5.0mV

0.0mV

Cleared

8.0mV

1-56 IM 04L31A01-03E

1.15 Measurement Function > Measurement Alarm Related Settings

Turning ON/OFF the Alarm

You can set up to four alarms for each channel. You can set alarms not only on measurement channels but also computation channels. For each alarm, you can set different alarm conditions.

Alarm Conditions

The following eight conditions (shown as [Type] on the setting display) are available.

• Upper limit alarm

An alarm occurs when the measured/computed value exceeds the alarm value.

• Lower limit alarm

An alarm occurs when the measured/computed value falls below the alarm value.

Upper limit alarm

Alarm occurrence

Alarm release

Process value

Alarm value

• Difference upper limit alarm (can be set on difference computation channels only) An alarm occurs when the difference in the measured values of two channels exceeds the difference upper limit alarm value.

• Difference lower limit alarm (can be set on difference computation channels only) An alarm occurs when the difference in the measured values of two channels falls below the difference upper limit alarm value.

• Upper limit on rate-of-change alarm (can be set on measurement channels only) The rate-of-change of the measured values is checked over a certain time (interval). An alarm occurs if the rate-of-change of the measured value in the rising direction exceeds the specified value.

• Lower limit on rate-of-change alarm (can be set on measurement channels only) The rate-of-change of the measured values is checked over a certain time (interval). An alarm occurs if the rate-of-change of the measured value in the falling direction exceeds the specified value.

Upper limit on rate-of-change alarm Lower limit on rate-of-change alarm

Change in the measured

Measured

value

Interval

2-t1

value

Amount of change in the setting

Time

-T1|

Lower limit alarm

Process value

Alarm occurrence

Measured

value

Alarm release

Alarm value

Interval

2-t1

Amount of change in the setting

Change in the measured value

Time

Explanation of Functions

-T1|

IM 04L31A01-03E

The alarm value of the rate-of-change alarm is set using an absolute value. The interval is derived using the following equation and set using the number of sampled data. Interval = Scan interval × number of sampled data

• Delay upper limit alarm

An alarm occurs when the measured/computed value remains above the alarm value for the specified time (delay).

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1.15 Measurement Function > Measurement Alarm Related Settings

• Delay lower limit alarm

An alarm occurs when the measured/computed value remains below the alarm value for the specified time (delay).

Delay upper limit alarm example (T is the specified delay)

Measured value or computed value

X1 X2 X3 X4

• Alarm does not occur at T1, because the time is shorter than the specified delay (T).

• The input exceeds the alarm value at X2, but the alarm occurs at X3 at which the

specified delay period elapses (the time when the alarm occurs is the time at X3).

• The input falls below the alarm value at X4 and the alarm is released.

Note

The following special operations are available for the delay upper/lower limit alarm.

• When a delay alarm is set on a computation channel and the computation is stopped

If the computation is stopped in a condition in which the computed value is exceeding the alarm setting, the alarm is turned ON after the specified period (delay period) elapses.

Stop computation

Alarm setting

Alarm releaseAlarm occurrence

Alarm setting

Computed values

Alarm occurrence

• Delay alarm when a power failure occurs

Alarm detection is reset upon a power failure. It restarts the operation after the power recovers.

Measured value or computed value

Alarm setting

Alarm

:Off

T T

On Off On Off On Off

Power failure occurrence/recovery

• Operation when the alarm setting is changed

• When a new delay alarm is set The alarm detection starts at the time the alarm is set. It is unaffected by the conditions existing before the alarm is set.

• If the alarm setting of a preexisting delay alarm is changed

• If an alarm is not occurring at the time of the change, alarm detection starts at the

new setting.

• If an alarm is occurring at the time of the change and the alarm type is set to delay upper limit alarm, the alarm continues as long as the input is above or equal to the new setting. If the input is below the new setting, the alarm turns OFF. If the alarm type is set to delay lower limit alarm, the alarm continues as long as the input is below or equal to the new setting. If the input is greater than the new setting, the alarm turns OFF.

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1.15 Measurement Function > Measurement Alarm Related Settings

Alarm Hysteresis

Alarm Relay Output

You can set a width (hysteresis) to the values used to activate and release alarms. Alarm hysteresis prevents frequent activation and release of alarms when the measured value is unstable around the alarm value. The hysteresis is fixed to 0.5% of the measurement span (display scale width if the range is set to scale). It is applied only on alarms set to upper/lower limit alarm on measurement channels, and the function can be turned ON/OFF. Factory default setting: Hysteresis ON

Upper limit alarm

Alarm occurrence

Measured value

Alarm setting

Alarm release

Lower limit alarm

Measured value

Alarm occurrence

Alarm release

Hysteresis (Approx. 0.5%)

Alarm setting

Relay Output ON/OFF

A relay signal can be output from the alarm output terminal [ALARM] of the measurement alarm option terminal block and the relay contact output/transistor output terminal [DIGITAL OUT] of the control output terminal block. You can set whether to output the relay signal for each alarm setting.

Reflash Alarm

This function is used to notify alarms occurring after the relay is activated on the first alarm when multiple alarms are assigned to a single alarm output relay. When this function is turned ON, the output relay is temporarily (approx. 500 ms) released when alarms after the first alarm occur. The initial setting is [Off] (not use reflash alarm). The reflash alarm function is set only on output relays I01, I02, and I03.

Explanation of Functions

Channel 1

Alarm

Alarm output relay (Reflash alarm ON)

Alarm output relay (Reflash alarm OFF)

Channel 2

Channel 3

Approx.

500 ms

Approx.

500 ms

Note

If the reflash alarm is set, I01 to I03 become dedicated reflash alarms regardless of the number of alarm output relays. Therefore, relays I01 to I03 operate as OR logic (see “AND/ OR of Alarm Output Relays”) and non-hold (see

Relays”

) regardless of the settings made in “AND/OR of alarm output relays” and “Hold/Non-

hold operation of the alarm output relay.”

“Hold/Non-hold Operation of Alarm Output

IM 04L31A01-03E

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1.15 Measurement Function > Measurement Alarm Related Settings

AND/OR of Alarm Output Relays

When a single alarm relay is shared among multiple alarms, you can select either condition below to activate the alarm output relay.

• AND: Activated when all assigned alarms are occurring simultaneously.

• OR: Activated when any of the specified alarms is occurring.

Set the alarm output relays for taking the AND logic in the following fashion: “I01 (first relay) to Ixx (where xx is the relay number).” The value is initially set to [None] (no AND relay).

Channel 1

Alarm

Channel 2

AND

Alarm output relay

Note

When the reflash alarm is turned ON, I01 to I03 operates as reflash alarms. They are fixed to OR logic operation. Specifying AND produces no effect.

Energized/De-energized Operation of Alarm Output Relays

You can select whether the alarm output relay is energized or de-energized when an alarm occurs. If de-energized is selected, the alarm output relay behaves in the same fashion as when an alarm occurs if the power is shut down. The setting applies to all alarm outputs. The initial setting is [Energized].

De-energized

NOEnergized

C NC NO C NC NO C NC

NO C NC NO C NCNO C NC

When power is

shut down

NO: Normally Opened, C: Common, NC: Normally Closed

When alarm is

not occurring

When alarm is

occurring

1-60 IM 04L31A01-03E

Release

When indication is set to non-hold

Alarm

Occurrence

Red icon

Indication

None

When indication is set to hold

Occurrence

Release

None

Blinking red icon

Blinking green icon

Alarm ACK

Blinking red icon

Alarm ACK

1.15 Measurement Function > Measurement Alarm Related Settings

Hold/Non-hold Operation of Alarm Output Relays

You can select the following behavior when the alarm switches from the activated condition to the released condition (reverts to the normal condition).

• Turn OFF the output relay with the release of the alarm (non-hold).

• Hold the output relay at ON until an alarm ACK operation is performed (hold).

The setting applies to all alarm output relays. The initial setting is [Non-hold].

When set to non-hold

Alarm ON

Alarm OFF

Relay output ON/OFF is for the case when

Relay output ON

Relay output OFF

When set to hold

Alarm ON

Alarm OFF

Relay output ON

Alarm ACK

NO (Normally Opened) terminal is used. If a NC (Normally Closed) terminal is used, the ON/OFF condition is reversed from the condition shown in the left figure.

Explanation of Functions

Relay output OFF

Note

When the reflash alarm is turned ON, I01 to I03 are set to non-hold. Specifying [Hold] produces no effect.

Hold/Non-hold of Alarm Indications

You can select the following behavior when the alarm switches from the activated condition to the released condition.

• Clear the alarm indication with the release of the alarm (non-hold).

• Hold the alarm indication until the alarm ACK operation is performed (hold).

The initial setting is [Non-hold].

Alarm Icon Indication Example

IM 04L31A01-03E

Note

The non-hold/hold setting of the alarm indication also applies to control alarms.

Alarm icon

1-61

1.16 Display Function

Display Types and Switching Operation

As indicated in the following figure, key operation is used to switch the displays.

Power ON

Operation mode

Operation display

[End] soft key -> DISP/ENTER key (This operation saves the settings made in the basic setting mode.)

MENU key

ESC key

Control setting mode [Setting mode (Control)]

Soft keys

MENU key or ESC key

Setup display (#1 to #7)

#1 to #8 when program

control is ON.

MENU key or ESC key

Common and measurement setting mode [Set mode]

MENU key

Press the FUNC key for 3 s

Soft keys

MENU key or ESC key

Press the FUNC key for 3 s

Setup display (#1 to #11)

This display is used to select the necessary setup items.

• Selection Display for Control Related Setup Items

Basic setting mode

Soft keys

Setup display (#1 to #12

#1 to #11: Basic common and measurement settings #12: Basic control settings

ESC key

)

Setting Display

This display is used to set various parameters for the selected item.

• Control Input Range Setting Display

1-62 IM 04L31A01-03E

1.16 Display Function

Operation Display

This display is used to monitor the operation status and carry out control operations such as running and stopping the operation.

• Control Group Display (Controller Style) for Monitoring the Control Status and Performing Control Operations

• Trend Display of Measured Data

Explanation of Functions

Display Construction

The display consists of the operation status indication section, data display section, and the soft key menu. However, on the measurement operation display, the [FUNC] key must be pressed to show the soft key menu. [Control Group Display (Faceplate Style) Example]

Operation status display section

Control data display section

Soft key menu

IM 04L31A01-03E

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1.16 Display Function

• Operation Status Indication Section

The following information is displayed in the status display section during operation mode and setting mode. (The information is not displayed during basic setting mode. [Setup Mode] is displayed instead.)

(When set to display data only)

(When set to [Free])

(When set to [Trigger] or [Rotate])

When the internal memory is partitioned into 16 blocks

859

1. User name

The user name is displayed when the key login function is used and the user is logged in.

2. Group name or display name

The display name or group name corresponding to the display shown on the data display section. [ALL] is displayed only when all channels are displayed on the trend display.

3. Current date and time

The current date and time are displayed.

4. Data acquisition to the internal memory ON/OFF

A and B is alternately displayed: Data being acquired or waiting for a trigger for event data. C: Data acquisition stopped

Note

For event data that starts sampling when the trigger condition is met, the display indicates that sampling is in progress even in the trigger wait state. The trigger wait state can be determined on the bar graph.

5. Memory usage of the display data acquisition area in the internal memory

Displayed when acquisition of display data is enabled.

• Bar graph Indicates the amount of display data acquisition area that is being used.

• Time display Remaining time of the display data acquisition area. When the remaining time becomes short, the time is displayed in units of minutes.

Remaining time Unit

100 days or more % (Percentage of the remaining area in the display data acquisition area) 100 hours or more to Days (time unit less then one day is truncated) less than 100 days 60 minutes or more to Hours (time unit less then one hour is truncated) less than 100 hours Less than 60 minutes Minutes (time unit less then one minute is truncated)

• n/16 The maximum number of display data files that can be written to the internal memory is 16. “16” represents this value. The value n is the number of display data files in the internal memory.

1-64 IM 04L31A01-03E

1.16 Display Function

Note

In the following cases, the display data is overwritten from the oldest file. Use caution because the overwritten data is lost forever.

• When there is no more remaining time of the display data acquisition area in the internal memory At this point, the status display section shows [Overwrite].

• When the number of display data files in the internal memory has exceeded 16

6. Memory usage of the event data acquisition area in the internal memory

Displayed when acquisition of event data is enabled.

• When the acquisition mode is [Free]

• Bar graph

Indicates the amount of event data acquisition area that is being used.

• Time display

Remaining time of the event data acquisition area. When the remaining time becomes short, the time is displayed in units of minutes.

Remaining time Unit

100 days or more % (Percentage of the remaining area in the event data acquisition area) 100 hours or more to Days (time unit less then one day is truncated) less than 100 days 60 minutes or more to Hours (time unit less then one hour is truncated) less than 100 hours Less than 60 minutes Minutes (time unit less then one minute is truncated)

Explanation of Functions

• n/16

The maximum number of event data files that can be written to the internal memory is 16. “16” represents this value. The value n is the number of event data files in the internal memory.

Note

In the following cases, the event data is overwritten from the oldest file. Use caution because the overwritten data is lost forever.

• When there is no more remaining time of the event data acquisition area in the internal memory The status display section shows [Overwrite].

• When the number of event data files in the internal memory has exceeded 16

• When the mode is [Trigger] or [Rotate]

• Bar graph

Displays the acquisition time (amount of memory used with respect to the data length) of the specified event data. When pretrigger is specified and START is pressed causing the CX1000 to enter the trigger wait state, data of size equal to the pretrigger amount is acquired to the internal memory. At this point the bar is displayed in orange. After acquiring the data of size equal to the pretrigger, the length of the bar stays fixed. However, the relevant data is updated until the trigger condition is met. When the trigger condition is met, the bar turns green. Data is acquired to the internal memory after the pretrigger data. If data acquisition to all blocks is finished in [Trigger] mode, [Full] is displayed in the bar. When [Full] is displayed, event data is not acquired to the internal memory even if the trigger condition is met.

IM 04L31A01-03E

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1.16 Display Function

• Block display When the event data acquisition area is divided into multiple blocks, the block usage is displayed. White blocks: Blocks with no data. Green blocks: Block containing data that was acquired to the internal

memory after starting the current acquisition of event data.

Gray blocks: Blocks containing previous data.

7. Icon indicating the external storage medium status

If E and F are displayed alternately, the external storage medium is being accessed. If the icon is not displayed, this indicates that an external storage medium is not inserted in the drive. Other indications are as follows. D: The operation cover on the front panel is open. F: External storage medium waiting (not being accessed). G: The green level inside the icon indicates the amount of the external storage medium

used. If the remaining amount falls to 10% or less, the color changes to red.

Note

• The CX1000 detects whether an external storage medium is inserted in the drive when the operation cover is closed.

• To prevent adverse effects from dust, use the CX1000 with the door closed.

8. Computation icon (only on models with the computation option)

No computation mark is displayed: No computation option or computation is stopped. White computation icon: Computation in progress. Yellow computation icon: Computation dropout occurred.

Note

Computation dropout occurs when the computation process cannot be completed within the scan interval. Press “FUNC > [Math ACK] soft key” to set the icon back to a white computation icon. If computation dropouts occur, increase the scan interval or reduce the number of computation channels that are turned on.

9. Key lock icon

Key icon: Key locked No indication: No key lock

10. E-mail transmission function icon

Displayed when the e-mail transmission function (see the

Communication Interface User’s Manual

) is enabled.

11. Alarm icon

Displayed when any one of the alarms is occurring.

• Data Display Section

The control operation display shows the PV input values, SPs, and OUT for monitoring the control status, tuning information, and so on. The measurement operation display shows the trend display, digital display, and bar graph display of the measured and computed data as well as alarm, message, and file information. For details on the displayed contents, see the following pages.

CX1000/CX2000

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1.16 Display Function

Setting Groups

The control monitoring data and measured/computed data on the operation display are shown in groups. Therefore, control loops and measurement channels must be assigned to groups.

Setting Control Groups (for the Control Function)

Up to four loops by combining internal and external loops can be assigned to each group. In addition to internal and external loops, measurement channels can also be assigned. You can assign up to four groups and assign a group name to each group for easy identification.

Setting Measurement Groups (for the Measurement Function)

Measurement channels or computation channels are assigned. Up to six groups can be registered. The groups are common to the trend, digital, and bar graph displays. On the trend, digital, and bar graph displays, the displayed groups can be automatically switched at “5 s,” “10 s,” “20 s,” “30 s,” or “1 min” intervals. For trend display, the waveform of all applicable channels can be displayed on a single display rather than in groups.

Displaying Tags

For identifying the control loops and channels, tags (tag comments can also be assigned to control loops) can be displayed in place of numbers.

Control Operation Display > Control Group Display

Loop selection cursor

Tag name

Tag comment display section

Remote (REM) or local (LOC)

Explanation of Functions

Operation running (RUN), operation stopped (STP), or auto tuning (blinking AT)

Auto/manual

PV input value

Target setpoint

Control output value

Red when alarm

is occurring

Alarm mark

Scale (The value indicates span lower limit or upper limit.)

Process value (PV) Red: Alarm occurrence Green: Alarm OFF

Control output value (OUT) Red: Controllable Yellow: Not controllable

PV input value Upper limit alarm Red: Alarm occurrence Green: Alarm OFF

Target setpoint (SP) Red: Can be set Yellow: Cannot be set

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1.16 Display Function

Control Operation Display > Tuning Display

Control parameter setup display section

PID number

Item name

Control Operation Display > Overview Display

Red indication when alarm is occurring

Loop selection cursor

Control status indication section (similar to the display on the faceplate control group display)

Setup display AT: PID number being auto tuned SP No.: Current target setpoint number PID No.: Current PID number Group No.: PID number of the tuning parameter to be manipulated

Trend waveform display of PV (green),

Time

SP (red), and OUT (yellow)

Tag name and tag comment

Remote (REM) or local (LOC)

Run (RUN)/Stop (STP)/ auto tuning (blinking AT)

Auto/manual

PV input value

Target setpoint

Control output value

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1.16 Display Function

Control Operation Display > Control Action Summary Display

Item selection cursor

Tag name + tag comment or "Program"

Operation status

Date and time of occurrence

Note

The status indicates “****,” if an error is occurring on an external loop using the optional Green series communication function.

Control Operation Display > DI/DO Status Display

Contact ON/OFF (red: ON, green: OFF)

Contact number (DI: input, DO: output)

Explanation of Functions

Note

Contact displays with numbers “DOXXX” indicate the alarm output status, not the ON/OFF status of the output. For example, if the energize/de-energize setting of an alarm output relay is set to “de-energize,” the indication turns red when an alarm occurs to indicate that it is deenergized.

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1.16 Display Function

Control Operation Display > Trend Display

Displayed Information and Display Direction

In addition to the waveforms of measured/computed data, PVs, SPs, and OUT of internal/external control loops are also assigned to channels and displayed. The display direction of the waveform can be set to horizontal or vertical as show in the following figure. Numeric values can be displayed along with waveforms.

Note

For a description of the assignment of internal control channels (internal loop channels) and external control channels (external loop channels), see channel assignment explanation on

Trend (Vertical) Display

Trend (Vertical, All Channels) Display

page 1-83

Scale

Display update rate

Message (message mark, time, and message)

Trip line

Channel No. or tag name Measured or computed value

Unit

Alarm mark

Numerical display section (digital display section)

Waveforms of all channels that are set to display the trend

Data of the selected group

Trend (Horizontal) Display

Type 1 Typ e 2

Displayed Info Description

Message Messages specified by the user can be displayed at arbitrary points in time. For example, by displaying a

message when a certain operation is carried out, the point at which the operation is carried out can be seen visually. Displayed messages are saved.

Trip line You can display a line to indicate a particular value of interest (trip line) for each group. You can select the thickness

Scale A scale appropriate for the measured item can be displayed for each channel. The number of divisions of the display

of the displayed line from three types: 1, 2, or 3 dots. Up to four trip lines can be displayed on a single group.

scale created by the main scale marks can be set to a value in the range 4 to 12 divisions (also applies to the bar graph display). Medium and small scale marks are displayed in between the main scale marks. You can select whether or not to display the scale for each channel and the display position.

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1.16 Display Function

Updating the Waveform and Updating the Numerical Display

One division on the CX1000 consists of 30 dots along the time axis on the LCD. The displayed waveform is updated at an interval corresponding to one dot. This interval is determined by the time corresponding to one division (referred to as the display update rate). The relationship between the display update rate and the speed of movement of waveforms is as follows. Measured/computed values of the numerical display are updated every second (every 2 s if the scan interval is set to 2 s on the).

Display Update Rate (/div) 1 min 2 min 5 min 10 min 20 min 30 min 1 h 2 h 4 h 10 h

Speed of Movement of 594 297 119 59 30 20 10 5 2.5 1.0 Waveforms (approximate value, mm/h)

Note

The speed of movement of the trend display along the time axis is derived from the following equation given the dot pitch of the LCD (0.33 mm). The speed of movement of the trend display along the time axis = 30 (dots) × 0.33 (mm) × 60 (min)/display update rate (min)

Display Format of Waveforms

The data shown on the display consists of maximum and minimum values of the data that is sampled at the scan interval, within the time period corresponding to one dot.

Explanation of Functions

Maximum value

Minimum value

1 division (30 dots)

{

1 minute

{

2 s (1 dot)

If the display update rate is set to 1 minute, the time corresponding to 1 dot (sampling interval of display data) is 2 s. For example, if the scan interval is 250 ms, the input signal is sampled 8 times within a 2-s interval. The maximum and minimum values of the data sampled eight times are used as display data.

The time period corresponding to one dot is called “the sampling interval of displayed data.” The sampling interval of displayed data is determined by the display update interval. The relationship between the display update rate and the sampling interval of displayed data is as follows:

Display Update Rate (/div) 1 min 2 min 5 min 10 min 20 min 30 min 1 h 2 h 4 h 10 h

Sampling interval of 2 4 10 20 40 60 120 240 480 1200 displayed data (s)

Zone Display

The waveform display range is called a zone. You can display channels by setting a zone for each channel. Displaying the waveforms in separate zones facilitates reading of the waveform. In the example in the figure, channel 1 is displayed in the 0 to 30% zone, channel 1 in the 30 to 60% zone, and channel 3 in the 60 to 100% zone.

When zone display is not used When zone display is used

Time axis

100%

CH3

CH2

CH1

Time axis

100%

Zone 3

60%

Zone 2

30%

Zone 1

0%0%

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1.16 Display Function

Partial Expanded Display

This function compresses a section of the waveform display range and expands the rest of the section. In this function, you specify the destination position (the new boundary position) where a single value (boundary point) in the display range is moved. In the example in the figure, 0 V (boundary value) is moved to the 30% position of the display range (new boundary position). The 30% below the boundary corresponds to “–6 V to 0 V” and 70% above the boundary corresponds to “0 V to 6 V.”

When partial expanded display is usedWhen partial expanded display is not used

Measured

value

Percentage with

respect to the

display span

100

Measured

value

Percentage with

respect to the

display span

100

Boundary

Time axis

Waveform color and line thickness

The waveform color can be set or changed for each channel. The waveform color and the bar color in the bar graph display are the same. You can select the thickness of the waveform line from 1 to 3 dots. The thickness of the line cannot be set separately for each channel.

Control Operation Display > Digital Display

Displays the measured, computed, and control data numerically using large numbers.

New

500

Time axis

Channel No. or tag name

Specified alarm

Measured or computed value

Unit

boundary position

0–6V–6V 0

Expanded section

Reduced section

Updating of the Numerical Display

Measured/computed values are updated every second (every 2 s if the scan interval is set to 2 s).

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1.16 Display Function

Control Operation Display > Bar Graph Display

Displays the measured, computed, and control data using bar graphs.

Bar Graph (Horizontal) Display

Bar graph (displayed using the channel display color)

Alarm setpoint mark

Left end value of the scale

Bar Graph (Vertical) Display

Alarm setpoint mark

Scale

Right end value of the scale

Explanation of Functions

Measured or computed value Unit

Channel No. or tag name

Alarm that is occurring

Specified alarm

Channel No. or tag name

Specified alarm

Top scale value

Scale

Bottom scale value and unit

Bar graph (Channel display color)

Measured or computed value

Updating of the Bar Graph and Numerical Displays

Measured/computed values and bar graphs are updated every second (every 2 s if the scan interval is set to 2 s).

Displayed Information

The following items can be displayed:

Function Description

Display direction The bar graph can be displayed vertically or horizontally. Reference position When the bar graph is displayed horizontally, the starting point of the bar

Display color The displayed color of bar graphs can be specified for each channel. The

Scale display Main scale marks are displayed for each channel. You can select the number

(reference position) can be set to standard (Left or right end of the scale, whichever the value is smaller) or the center.

display color is common to the trend display color.

of divisions created by the main scale marks from 4 to 12. This is common with the number of scale divisions of the trend display.

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1.16 Display Function

Control Operation Display > Overview Display

A list of measured/computed values and alarm conditions of all measurement/ computation channels is displayed. You can move the cursor to select a channel and display the trend or bar graph of the group containing the selected channel. For the procedure in displaying the overview display, see section 8.5.

The type of alarm that is occurring

Channel selection cursor

Measured or computed value

Channel No. or tag name

Update Rate of the Numerical Display

Measured/computed values are updated every second (every 2 s if the scan interval is set to 2 s).

Area of channels on which an alarm is not occurring is indicated in green

Area of channels on which an alarm is occurring is indicated in red

Control/Measurement Common Operation Display > Alarm Summary

Lists the newest control alarms and measurement alarms. By scrolling the display using the arrow keys, up to 120 incidents can be displayed. By selecting an alarm from the list using up and down arrow keys, the historical trend of the display data or event data containing the alarm can be recalled. For a description on the historical trend display,

Alarm selection cursor*

see the section

Number of the alarm information displayed on the bottom line

Alarm status indication mark

Select a alarm using the cursor and select [INFORMATION] > [JUMP TO HISTORY]

on the display selection menu to display the data historical trend containing the selected alarm information.

Note

• You can also display only the control alarms (see

• Alarm type indicates [ETC], if the alarm is an external loop and the alarm is of a type other

“Measurement Operation Display > Historical Trend”

Number of the alarm information in the internal memory (120 max.)

Control loop name (tag name + tag comment)/channel number (or tag name)

Alarm number (1, 2, 3, 4)

Alarm type (See page 4-24 for the meaning of control alarm symbols.

Control alarm: PVH, PVL, SPH, SPL, OTH, OTL, DVH, DVL, DVO, DVI, ETC (see Note below) Measurement alarm: H, L, h, l, R, r, T, t

Date and time when the alarm occurred

than the control alarms that you can specify on the CX1000.

See page 7-8 for the meaning of measurement alarm symbols.)

Date and time when the alarm was released

page 8-1

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1.16 Display Function

Control Operation Display > Message Summary

A list of written messages and the time the messages were written is displayed.

• Up to 120 sets of message information can be stored to the internal memory. When the number of message information exceeds 120, the information is overwritten from the oldest information.

• By scrolling the screen using up and down arrow keys, the message information in the internal memory can be displayed.

• By selecting a message from the list using up and down arrow keys, the historical trend of the display data or event data containing the message can be recalled. For a description on the historical trend display, see “

Trend

” in this section.

Number of the message displayed on the bottom line

Number of messages in the internal memory

Date/time when message as written

Name of the user who wrote the message (only when the key login function is used)

Message string

Cursor (Select a message using the cursor and select [INFORMATION] > [JUMP TO HISTORY] on the display selection menu to display the data historical trend containing the selected message.)

Control Operation Display > Memory Summary

The information pertaining to the display data and event data in the internal memory is displayed.

• By selecting the display data or event data using the arrow keys, the historical trend display can be recalled. For a description on the historical trend display, see “

Operation Display > Historical Trend

• The number of manual sampled data, TLOG data (/M1 option), and report data (/M1 option) residing in the internal memory are displayed.

• For models that have the alarm output relays (option), the ON/OFF status of the relays are also listed.

Number of data points in the internal memory/maximum number of data points that can be acquired in the internal memory

Date/time when the newest data was acquired

Explanation of Functions

Control Operation Display > Historical

Control

” in this section.

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Data type (switch usin left and right arrow keys)

• Display data

Date/time when the data acquisition ended

Date/time when the data acquisition started

Cursor (Select the data using the cursor and select [INFORMATION] > [JUMP TO HISTORY] on the display selection menu to display the historical trend of the selected data.)

Factor causing the end of data acquisition

Sampling count

• Event data

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1.16 Display Function

Control Operation Display > Report Data (Optional Function)

Report data residing in the internal memory can be displayed. The report function is used to write the average, minimum, maximum, and sum at specified intervals for the specified channels. Reports can be made hourly, daily, weekly, or monthly.

Number of the report data being displayed

Number of report data in the internal memory

Type of report

Start date/time Report date/time

Unit

Report data status

Channel No. or tag name

Average, maximum, minimum, and sum

Control Operation Display > Historical Trend Display

The waveform of the past display data* and event data* in the internal memory can be displayed. This function is called “Historical trend.”

Methods of Displaying the Historical Trend

The following four methods are available in displaying the historical trend.

• Display from the alarm summary.

• Display from the message summary.

• Display from the memory summary.

• Display from the control action summary.

• Display from the program event summary (only on models with the program control

option)

• Recall from the screen menu.

Information Displayed on the Historical Trend

Alarm information and scales are not displayed on the historical trend display.

The background color is the opposite of the trend display color. (black or white)

Waveform display (channel display color)

Date and time at the left end on the time axis

Message

Zoom factor of the time axis (using the display selection menu)

Time axis

Trip line

Position of the newest displayed data

Date and time at the right end on the time axis

Channel No. or tag name

Measured/computed value (max. or min. value at the cursor position)

Measured/computed value (max. or min. value over the entire display range)

This area is displayed using the channel display color.

Unit

Screen switch display Up arrow key:

Display the all data display (see the next page)

Down arrow key:

Half screen display of current and historical trend (see the next page)

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1.16 Display Function

Operations on the Historical Trend Display

• The waveform can be scrolled along the time axis using the left and right arrow keys (for horizontal display) or up and down arrow keys (for vertical display).

• The time axis can be expanded or reduced using the display selection menu ([TREND HISTORY] > [ZOOM +] or [ZOOM -]).

• You can display all the data points on the historical trend display in a section of the screen (all data display). When you move the cursor (yellow line) using the left and right arrow keys (for horizontal display), the date and time of the acquisition of the data at the cursor position are displayed. By pressing the down arrow key (for horizontal display) after moving the cursor to return to the original display, you can change the display position within the entire data. In the display that appears, the data at the cursor position is shown at the right end of the display.

Cursor

All data display

Date and time at the cursor position

• You can display the information of the file displayed on the historical trend through the display selection menu operation ([Historical Trend] > [Memory Information ON]).

File name and data type Serial No. of the instrument

that sampled the data

Start/end time and user name (User name is displayed only when the key login function is used.)

Explanation of Functions

Half Screen Display (Only When Displaying the Historical Trend of the Display Data)

Using up and down arrow keys, you can have the left half of the display (lower half if the trend display is vertical) show the historical data of the display data and the right half (upper half if the trend display is vertical) show the display data currently being measured.

Historical trend

(Display data only) Current trend

Current trend

information

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1.16 Display Function

Control Operation Display > Alarm Display

The measurement alarm status is indicated using an alarm icon on the status display section (common with the control alarm) and the alarm indication on operation displays such as the trend display. The displayed pattern varies depending on the non-hold/hold mode of the alarm indication. In the explanation below, “Alarm ACK” refers to the alarm release operation.

Alarm Icon in the Status Display Section

Alarm icon

Alarm

Alarm Indication on the Trend Display

Occurrence

Alarm

Release

Mark for the specified alarm

Occurrence

Release

Alarm icon

When indication is set to non-hold

Blinking

None Red None None None None NoneRed

red

indication

When indication is set to hold

Alarm ACK

Blinking

green

indication

Alarm ACK

Blinking

red

indication

Alarm type

Measured value

Alarm mark

When indication is set to hold

Alarm ACK Alarm ACK

red

Blinking

green

indication

Blinking

Green Green Green Green

indication

Blinking

red

indication

RedGreen Red Green

Alarm Indication on the Digital Display

Measured value

Alarm mark

When indication is set to non-hold

When indication is set to hold

Alarm ACK Alarm ACK

Occurrence

Alarm

Release

Mark for the

Green Green Green Green Green GreenRedRed

Blinking

red

indication

Blinking

green

indication

Blinking

red

indication

specified alarm

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1.16 Display Function

Alarm Indication on the Bar Graph Display

Occurrence

Alarm

Mark for the specified alarm

Alarm Indication on the Overview Display

Alarm mark

Alarm setpoint mar

Measured value

When indication is set to non-hold

When indication is set to hold

Alarm ACK Alarm ACK

Release

red

Blinking

green

indication

Blinking

Green Green Green Green Green GreenRed Red

indication

Channel No. or tag name

Measured value

Cursor

Area of channels on which an alarm is occurring is indicated in red

Explanation of Functions

Blinking

red

indication

Occurrence

Alarm

Release

Channel/Tag

Channel display

area color

Alarm type

When indication is set to non-hold

When indication is set to hold

Alarm ACK

Blinking

indication

Green Green Green Green Green GreenRed Red Red

When all the alarms occurring on the channel is acknowledged (alarm ACK)

Alarm ACK

Blinking

indication

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1.16 Display Function

Alarm information selection cursor*

Alarm Summary Display

A list of the most recent alarms can be displayed.

• Up to 120 sets of alarm information can be stored to the internal memory. When the number of alarm information exceeds 120, the information is overwritten from the oldest information.

• By scrolling the screen using arrow keys, the alarm information in the internal memory can be displayed.

• You can select arbitrary alarm information and show the historical trend of the display data or event data that contains the alarm information.

For the operating procedure, see

Number of the alarm information displayed on the bottom line

Number of the alarm information in the internal memory (up to 120)

Control loop name (tag + tag comment)/channel number (or tag)

Alarm No. (1, 2, 3, 4)

Alarm type (See page 4-24 for the meaning of the control alarm symbols; see page 7-8 for the meaning of the measurement alarm symbols.)

Control alarms: PVH, PVL, SPH, SPL, OTH, OTL, DVH, DVL, DVO, DVI, ETC (see Note below) Measurement alarms: H, L, h, l, R, r, T, t

Date/Time when the alarm occurred Date/Time when the alarm was released

section 8.1

Alarm status mark

* Select the alarm information using the cursor and select [INFORMATION] > [JUMP TO HISTORY]

on the display selection menu to display the historical trend containing the selected alarm information.)

Note

• You can also display only the control alarms (see page 8-1).

• Alarm type indicates [ETC], if the alarm is an external loop and the alarm is of a type other

than the control alarms that you can specify on the CX1000.

Alarm Mark Indication

The mark indication varies depending on the hold/non-hold setting of alarm indication (see section 1.6) as follows.

When indication is set to non-hold

Occurrence

Alarm

Release

Mark

Red RedGreen Green Green

Setting the Display Conditions of the LCD

The following display conditions of the LCD can be configured.

Display Attribute Setting

Background color of The background color of the display can be set to white or black. The initial the operation display setting of the control operation display is [Black]; the initial setting of the

LCD brightness The brightness of the LCD can be set between eight levels. The initial setting is [4]. Backlight saver The lifetime of the LCD backlight can be extended by automatically dimming

measurement operation display is [White].

the light when there is no key operation for a certain amount of time. The display returns to the original brightness with a key operation or an alarm occurrence. The initial setting is set so that the backlight saver is disabled.

Blinking

red

indication

When indication is set to hold

Alarm ACK Alarm ACK

Blinking

green

indication

Blinking

red

indication

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1.17 Data Storage Function

Data Acquisition to the Internal Memory

Control Data

The following control related data can be acquired to the internal memory. Control related data includes the PV, SP, and OUT of external loops created through Green series communications (/CM1 optional function) in addition to those of internal loops.

Data Type Data Content

Display data Maximum/minimum values of PVs, SPs, and OUTs for every interval of acquisition to the internal

Event data Instantaneous value of PV, SP, and OUT at every specified sampling interval. Manual sampled data Data in ASCII format containing the time and PV at the time of key operation or remote input. Alarm summary data Channel on which alarm is occurred, alarm type, and time of occurrence and release. Event summary data Loop number at which the time event or PV event occurred and the time of occurrence and release. Operation mode Information of operation mode switching.

summary data

memory.

Internal control channel (internal loop channel) assignments

The data of two loops is assigned to channel numbers as follows. Loop 1 PV: 101, Loop 1 SP: 102, Loop 1 OUT: 103 Loop 2 PV: 104, Loop 6 SP: 105, Loop 6 OUT: 106

External control channel (external loop channel) assignments

The data of 4 loops is assigned to channel numbers as follows. External loop 1 PV: 201, External loop 1 SP: 202, External loop 1 OUT: 203

•••

External loop 4 PV: 210, External loop 4 SP: 211, External loop 4 OUT: 212

Measurement Data

• Display data and event data The measured/computed/control data can be written to two types of data, display data and event data, in the internal memory of the CX1000.

Display data

Data used to display waveforms on the CX1000 display. Display data consists of maximum and minimum values of the measured or computed data sampled at the scan interval within the time period corresponding to one dot on the time axis on the display. The display data that is saved can be likened to the conventional recording on the chart sheet and is useful for observations of long-term changes. The data is saved in binary format.

Event data

Event data consists of instantaneous values of the measured/computed/control data at specified sampling intervals. This is useful when you wish to observe the measured/ computed/control data more in detail than display data. If the sampling interval is set to the same value as the scan interval, all the measured or computed data sampled at the scan interval can be acquired to the internal memory. The data is saved in binary format.

Max. value per sampling interval Min. value per sampling interval

Display data

Explanation of Functions

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Event data

Measured/computed/ control data per scan interval

Scan interval Sampling interval of event data Sampling interval of dislay data (time equivalent to 1 dot on the display)

Time

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1.17 Data Storage Function

Internal memory size

The size of the internal memory for acquiring display data and event data is 1.2 MB. When the measured/computed/control data is saved using both display data and event data, 0.9 MB and 0.3 MB of memory is used for display data and event data, respectively.

CX1000 internal

memory

DISP/

ENTER

When set to display data only When set to event data only When set to display data and event data

1.2 MB

Display data

1.2 MB

Event data

0.9 MB

Display data Event data

0.3 MB

Data to be acquired and selecting the acquisition mode of event data

You can select “display data only,” “display data and event data,” or “even data only” for the items to be acquired (“Data type” in the settings). If “display data and event data” or “event data only” is selected, you can select the acquisition mode (“Mode” in the settings) from “Free,” “Trigger,” or “Rotate.” Refer to the following examples to make the appropriate selection for your application.

• Acquire only the display data at all times Data to be acquired: Display data only

• Acquire display data in normal cases and acquire event data around the alarm occurrence when alarms occur Data to be acquired: Display data and event data. Acquisition mode: Trigger or rotate

• Acquire event data at all times Data to be acquired: Event data only. Acquisition mode: Free

• Acquire event data only when alarms occur Data to be acquired: Event data only. Acquisition mode: Trigger or rotate

Block segmentation during event data acquisition

In the acquisition of event data, the acquisition area in the internal memory can be divided into blocks (block segmentation). The acquisition operation varies depending on whether the acquisition area is divided into blocks for each mode. For detailed information, see “Acquisition Mode of Event Data” in appendix 1, “Supplementary Explanation of the Acquisition of Display Data/Event Data to the Internal Memory.” You can select the number of blocks from 2, 4, 8, and 16.

• Manual sampled data

Every time a given key operation is carried out, all measured/computed/control data (instantaneous values) at that point is acquired to the internal memory except for measurement channels that are skipped and computation channels that are turned OFF.

• TLOG data (only on models with the computation function option) All the measured/computed data (instantaneous data) of all channels can be acquired to the internal memory at the preset interval. However, this excludes measurement channels that are skipped and computation channels that are turned OFF.

• Report data (only on models with the computation function option) The average, maximum, minimum, and sum can be computed for the specified channels at the preset interval, and the result can be acquired to the internal memory. You can select one hour (hourly report), one day (daily report), one hour/one day (hourly and daily), one day/one week (daily and weekly reports), or one day/one month (daily and monthly reports) for the interval.

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1.17 Data Storage Function

Saving Data to the External Storage Medium

The data acquired to the internal memory can be saved to an external storage medium. The following two methods are available in saving the data.

Manual Save

The data in the internal memory is saved to the external storage medium, only when the external storage medium is inserted into the drive. You can specify whether to save the entire data in the memory or only the data that have not been saved to the external storage medium beforehand.

Auto Save

Have the external storage medium inserted in the drive at all times. Data storage to the external storage medium is done automatically.

Note

• If an external storage medium is not inserted when the data save operation is started during “auto save” mode, the unsaved data is saved the first time the specified interval elapses after an external storage medium is inserted.

• If the acquisition of the display data to the internal memory or acquisition of the event data to the internal memory in free mode is started, you can save the display data or event data at any time by operating the “[FUNC] key > soft key” even during auto save mode.

• Display data

The display data in the internal memory is closed as a single file at the specified interval or at the specified date and time and saved to the external storage medium in binary format.

Examples of data save operation to the external storage medium Example 1 Auto save interval or data length: 1 day Date and time when data is saved to the external storage medium: Not use After starting at 13:10, data is saved every day at 13:10 to the external storage medium.

7/19 13:10 7/20 13:10 7/21 13:10 7/22 13:10

Explanation of Functions

Memory start

Example 2 Auto save interval or data length: 1 day Date and time when data is saved to the external storage medium: 0 hour every day. After starting at 13:10 on July 19th, data is saved at 0 hour on July 20th and then every day after and at 0 hour every day (the same time for both in this example).

7/19 13:10 7/20 0:00 7/21 0:00 7/22 0:00

Memory start Saved to the external

Example 3 Auto save interval or data length: 12 hours Date and time when data is saved to the external storage medium: 0 hour every day. After starting at 13:10 on July 19th, data is saved at 0 hour on July 20th and then every 12 hours after and at 0 hour every day (0 hour occurs at the same time as the 12 hour timing).

7/19 13:10 7/20 0:00 12:00 12:00 12:007/21 0:00 7/22 0:00

Memory start Saved to the external

Example 4 Auto save interval or data length: 2 days Date and time when data is saved to the external storage medium: 0 hour every day. After starting at 13:10 on July 19th, data is saved at 0 hour on July 20th and then every 2 days after and at 0 hour every day (the 2-day timing occurs at the same time as 0 hour).

7/19 13:10 7/20 0:00 7/21 0:00 7/22 0:00

storage medium

Saved to the external storage medium

IM 04L31A01-03E

Memory start Saved to the external

storage medium

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1.17 Data Storage Function

• Event data

• During the free mode The event data in the internal memory is closed as a single file at the specified interval (data length) or at the specified date and time and saved to the external storage medium in binary format.

• During trigger or rotate mode After acquiring the data to the internal memory over the specified period (data length), the event data in the internal memory is stored to the external storage medium in binary format. The following figure shows the operation when the acquisition area in the internal memory is divided using the trigger mode.

1st block 2nd block Last block

Data acquisition

Data acquisition Data acquisition

Trigger condition met

Stop

Saved to the external storage medium

Trigger wait

Trigger condition met

Trigger

Trigger wait

Saved to the external storage medium

condition met

Trigger wait

Saved to the external storage medium

• Manual sampled data

The first time manual sample is executed, a manual sample data file is created on the external storage medium. Data is added to this file every time manual sample is executed. The data is saved in ASCII format.

Note

If an external storage medium is not inserted in the drive during auto save mode, the unsaved data is saved the first time manual sample is executed after an external storage medium is inserted.

• TLOG data

The first time TLOG data is created, a TLOG data file is created on the external storage medium. The data is appended to this file at the specified interval. If the number of TLOG data points saved exceed 400, a new file is created on the external storage medium. The data is saved in ASCII format.

• Report data

The first time report data is created, a report data file is created on the external storage medium. A file is created for each type of report such as daily and monthly. The data is appended to this file every time of report. The report file is divided at the following times. The data is saved in ASCII format.

• For hourly reports

• When the report at 0 hour every day is created.

• When the number of data points in a single file reaches 25.

• For daily reports

• When the report on the 1st day of every month is created.

• When the number of data points in a single file reaches 32.

Other Types of Data That Can Be Stored

The following two types of data can be stored on the external storage medium.

• Setup data

The setup data can be saved to the external storage medium. The saved data can be loaded to change the CX1000 settings.

• Image data of the display screen

The image data of the display screen can be stored to the external storage medium in PNG format.

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1.17 Data Storage Function

File Name

• The file name “(Sampling month, day, hour, minute of the first data).extension” of display data, event data, manual sample data, TLOG data, and report data is automatically assigned.

• Display data file: Mddhhmma.CDS

• Event data file: Mddhhmma.CEV

• Manual sample data file: Mddhhmma.DMN

• TLOG data file: Mddhhmma.DTG

• Hourly data file: Mddhhmma.DHR

• Daily data file: Mddhhmma.DDR

• Weekly data file: Mddhhmma.DWR

• Monthly data file: Mddhhmma.DMR

M: Month (1-9, X (October), Y (November), Z (December), dd: day, hh: hour, mm: minute, a: the lowest digit of the year (0 to 9, except if another file with the same month, day, hour, and minute exist, in which case “a” to “z” are assigned in order).

• Setup data Set the name using up to 8 characters through the save operation. A .pcl extension is automatically added when the data is saved.

• Screen image data The file name “(month, day, hour, minute when the save operation of the screen image data was executed+sequence number).png” is automatically assigned. Mddhhmma.PNG M: Month (1-9, X (October), Y (November), Z (December), dd: day, hh: hour, mm: minute, a: the lowest digit of the year (0 to 9, except if the screen image data is saved multiple times within a minute, in which case “a” to “z” are assigned in order from the second file)

Save Destination Directory

All the data excluding the setup data (display data, event data, manual sample data, TLOG data, report data (only on models with the computation function option), and screen image data) are saved to the specified directory. The setup data is saved to the root directory. The save destination directory varies depending on how the data is saved. Auto save: Directory specified here. Manual save: Directory with a sequence number added to the string

specified here.

Save on the setting display: Directory with “A+sequence number” added to the string

specified here (the sequence number increments every time the data is saved).

File Header of Display Data and Event Data

You can enter a header comment using up to 32 alphanumeric characters.

Explanation of Functions

Saving Data via the Ethernet Network

The display data, event data, and report data, as described in “Data Acquisition to the Internal Memory,” can be automatically transferred to an FTP server via the Ethernet network for storage. Conversely, the CX1000 can function as an FTP server. The CX1000 can be accessed from a PC and the data in the external storage medium can be retrieved for storage. For a description on these functions, see the

Communication Interface User’s Manual (IM 04L31A01-17E)

IM 04L31A01-03E

CX1000/CX2000

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1.18 Computation and Report Functions (Option)

Computation Function

You can perform computations by specifying a computing equation and display the results as computed values of a computation channel, on various displays such as the trend display, numerical display, and bar graph display. You can use data of measurement channels, the data of computation channels, the data of control channels, constants, etc. in the computing equation. Computed data can be saved similar to measured data of measurement channels. Computation is performed every scan interval. Explanation of the computation function is also given in appendix 2, “Supplementary Explanation of the Computation Function” and appendix 3, “Meaning and Syntax of Computing Equations.” Read them along with this section.

Channel Numbers Dedicated to Computations

The channel numbers dedicated to computations are 31 to 42 (12 channels).

Computation Types and the Order of Precedence of Computations

The following computations can be performed. The order of precedence of computations in descending order is functions (SQR, ABS, LOG, EXP, relational computation, logical computation, and statistic computation), exponentiation, logical negation, multiplication/ division, addition/subtraction, greater/less relation, equal/not equal relation, logical product, logical sum/exclusive logical sum.

Type Description

Four arithmetic operation Addition (+), subtraction, multiplication (×), and division (/) ** Power. y = X SQR Square root ABS Absolute value LOG Common logarithm EXP Exponent. y = e Relational computation Determines <, ≤, >, ≥, =, or ≠ of two elements and outputs “0” or “1.” Logical computation Determines the AND (logical product), OR (logical sum), XOR (exclusive logical

sum) of two elements, NOT (negation) of an element and outputs “0” or “1.”

Statistical computation Determines the average (AVE), maximum (MAX), minimum (MIN), sum (TLOG) (SUM), and maximum - minimum (P-P) at specified time intervals for the

specified channels.

Rolling average Determines the moving average of the computed results of the channels to

which a computing equation has been assigned. The sampling interval and the number of samples can be specified for each channel. The maximum sampling interval is 1 hour; the maximum number of samples is 64.

Data That Can Be Used in Equations

Data Description

Measured data Measured value of a measurement channel or the control PV input. Computed data Computed value of a computation channel. Constants Set as constants K01 to K12 in the computation function. Communication input data Values set using the communication function and written as C01 to C12

Conditions of the Remote Input signal (0 or 1) of the remote control function, written as D01 to D08. Control Terminals

(see the

CX1000/CX2000 Communication Interface User’s Manual

Handing of the Unit in Computations

The unit corresponding to the measured/computed data in the equation is not compensated. In computations, measured and computed data are handled as values without units. For example, if the measured data from channel 01 is 20 mV and the measured data from channel 02 is 20 V, the computed result of 01 + 02 is 40.

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YOKOGAWA CX1006, CX1206 Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Precautions

Checking the Contents of the Package

How to Use This Manual

Contents

Chapter 1 Explanation of Functions

1.1 CX1000 Overview

1.2 Control Function Overview

1.3 Basic Settings of Control

1.4 PV Input Related Settings

1.5 Contact Input/Output Related Settings

1.6 Target Setpoint Related Settings

1.7 PID Parameter Settings

1.8 Control Output Suppression Settings

1.9 Settings for ON/OFF Control

1.10 Control Alarm Related Settings

1.11 Program Control Related Settings

1.12 Tuning

1.13 Measurement Function Overview

1.14 Measurement Function > Measurement Input Related Settings

1.15 Measurement Function > Measurement Alarm Related Settings

1.16 Display Function

1.17 Data Storage Function

1.18 Computation and Report Functions (Option)