Siemens UM344-2 User Manual

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USER’S MANUAL

UM344-2 Issue 1

August 1995

XTC TRANSMITTERS

SERIES 344 TERMPERATURE TRANSMITTERS

USER’S MANUAL

UM344-2 CONTENTS

TABLE OF CONTENTS

SECTION AND TITLE PAGE

1.0 INTRODUCTION................................................................................................................. 1-1

1.1 SECTION CONTENTS ......................................................................................................1-1

1.2 PRODUCT DESCRIPTION ...............................................................................................1-3

1.3 CONFIGURATION ........................................................................................................... 1-4

1.4 PRODUCT SUPPORT....................................................................................................... 1-4

2.0 XTC COMMUNICATOR .....................................................................................................2-1

2.1 DISPLAY.......................................................................................................................... 2-3

2.2 KEYPAD DESCRIP TION .................................................................................................2-3

2.2.1 Dedicated Keys ..........................................................................................................2-3

2.2.2 Function Keys ............................................................................................................ 2-5

2.3 LOOP CONNECTION....................................................................................................... 2-6

2.4 POWER .............................................................................................................................2-7

2.5 MXC SOFTWARE VERSION............................................................................................ 2-7

2.6 MXC MENU SCREENS AND PARAMETER MAP .......................................................... 2-7

3.0 INITIAL TRANSMITTER SET-UP..................................................................................... 3-1

3.1 COMMISSIONING TRANSMITTER ON THE BENCH OR IN THE FIELD ..................... 3-1

3.1.1 Test Equipment Needed.............................................................................................. 3-1

3.2 ESTABLISHING COMMUNICATION ..............................................................................3-3

3.3 TESTING THE TRANSMITTER, MXC, AND THE LOOP ................................................ 3-5

3.3.1 MXC Testing ............................................................................................................. 3-5

3.3.2 Transmitter Testing..................................................................................................... 3-6

3.3.3 Loop Testing.............................................................................................................. 3-7

3.4 REVIEW CONFIGURATION DATA ................................................................................ 3-7

3.5 CHECKING TRANSMITTER OUTPUT ............................................................................3-9

4.0 INSTALLATION................................................................................................................... 4-1

4.1 EQUIPMENT DELIVERY AND HANDLING................................................................... 4-1

4.1.1 Factory Shipment........................................................................................................ 4-1

4.1.2 Receipt of Shipment.................................................................................................... 4-1

4.1.3 Storage ...................................................................................................................... 4-1

4.2 ENVIRONMENTAL CONSIDERATIONS ........................................................................4-2

4.3 INSTALLATION CONSIDERATIONS............................................................................. 4-2

4.3.1 Mechanical ................................................................................................................4-2

4.3.2 Electrical.................................................................................................................... 4-3

4.3.3 Transmitter Operating Mode and Network Type ...........................................................4-3

4.3.3.1 Analog Mode .....................................................................................................4-4

4.3.3.2 Digital Mode ......................................................................................................4-4

4.3.4 Power Supply Requirements........................................................................................ 4-8

4.3.4.1 Point-To-Point Network..................................................................................... 4-9

4.3.4.2 Multi-Drop Network.......................................................................................... 4-9

4.3.5 Cable Capacitance and Maximum Length ..................................................................4-10

4.3.5.1 Cable Capacitance ........................................................................................... 4-10

4.3.5.2 Maximum Cable Length Calculation .................................................................. 4-10

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CONTENTS UM344-2

SECTION AND TITLE PAGE

4.3.6 Network Junctions....................................................................................................4-11

4.3.7 Safety Barriers ......................................................................................................... 4-12

4.3.8 Connection of Miscellaneous Hardware.....................................................................4-12

4.3.9 Determine Sensor Cable Requirements......................................................................4-13

4.3.10 2-Wire RTD Accuracy Limitations ..........................................................................4-14

4.3.11 Shielding and Grounding ..........................................................................................4-15

4.4 MECHANICAL INSTALLATION .................................................................................. 4-16

4.4.1 Pipe Mounting..........................................................................................................4-16

4.4.2 Flat Surface Mounting...............................................................................................4-19

4.4.3 Direct Mounting to Process ....................................................................................... 4-20

4.4.4 Local Digital Display Installation, Repositioning and Removal ...................................... 4-23

4.4.5 Electrical Conduit and Cable Installation ..................................................................... 4-26

4.4.5.1 Conduit ...........................................................................................................4-26

4.4.5.2 Cables.............................................................................................................4-28

4.4.5.3 Access to Transmitter Terminal Compartment ................................................... 4-28

4.5 ELECTRICAL INSTALLATION.....................................................................................4-29

4.6 HAZARDOUS AREA INSTALLATION .........................................................................4-33

5.0 ON-LINE AND OFF-LINE OPERATION........................................................................... 5-1

5.1 ON-LINE OPERATION .................................................................................................... 5-1

5.1.1 Using the MXC for Configuration................................................................................ 5-1

5.1.1.1 Sensor Input Block............................................................................................. 5-3

5.1.1.2 Operator Display Block...................................................................................... 5-5

5.1.1.3 Transmitter ID Block .........................................................................................5-6

5.1.1.4 Output Block .....................................................................................................5-7

5.1.1.5 Alarm Block...................................................................................................... 5-7

5.1.1.6 Setpoint Track and Hold Block........................................................................... 5-8

5.1.1.7 A/M Transfer Block.......................................................................................... 5-8

5.1.1.8 Controller Block................................................................................................. 5-9

5.1.1.9 End or Review Configuration ..............................................................................5-9

5.1.2 Downloading A Configuration....................................................................................5-10

5.1.3 Local Transmitter Operation......................................................................................5-11

5.1.3.1 Display Functions ............................................................................................. 5-12

5.1.3.2 Local Pushbutton Input Ranging........................................................................5-13

5.1.3.3 Local Pushbutton Damping Adjustment.............................................................5-15

5.1.3.4 Local Pushbutton AUTO/MANUAL, SETPOINT and VALVE Adjustments .....5-16

5.1.4 Quick Access Key Operation .................................................................................... 5-19

5.2 OFF-LINE OPERATION.................................................................................................5-22

5.2.1 Using Off-Line Operations to Access an Archive.......................................................5-22

5.2.2 Using an Archive in On-Line Memory.......................................................................5-24

6.0 CALIBRATION AND MAINTENANCE............................................................................. 6-1

6.1 CALIBRATION................................................................................................................. 6-1

6.1.1 Equipment Required.................................................................................................... 6-2

6.1.2 Transmitter Analog Output Calibration......................................................................... 6-2

6.1.2.1 Transmitter Normally Configured for Analog Mode ..............................................6-2

6.1.2.2 Transmitter Normally Configured for Digital Mode ...............................................6-5

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UM344-2 CONTENTS

SECTION AND TITLE PAGE

6.1.3 RTD/OHM Type Input Calibration .............................................................................. 6-6

6.1.3.1 RTD/OHM Calibration Check ............................................................................6-6

6.1.3.2 Current Source Calibration ................................................................................. 6-7

6.1.4 Thermocouple/Millivolt Type Input Calibration.............................................................. 6-9

6.1.4.1 Thermocouple/Millivolt Calibration Check............................................................ 6-9

6.1.4.2 Narrow/Wide Millivolt Calibration.....................................................................6-11

6.2 PREVENTIVE MAINTENANCE ....................................................................................6-12

6.2.1 Tool and Equipment Requirements ............................................................................. 6-12

6.2.2 Transmitter Exterior Inspection..................................................................................6-13

6.2.3 Transmitter Exterior Cleaning....................................................................................6-13

6.2.4 Transmitter Enclosure Interior Inspection...................................................................6-13

6.2.5 Transmitter Calibration..............................................................................................6-14

6.3 TROUBLESHOOTING....................................................................................................6-14

6.3.1 Preliminary Troubleshooting ......................................................................................6-14

6.3.2 Troubleshooting........................................................................................................6-15

6.3.2.1 Diagnostic Messages .......................................................................................6-15

6.3.2.2 Possible Transmitter Output Problems...............................................................6-19

6.3.3 Diagnosing a Defective Digital (LCD) Meter .............................................................6-22

6.3.4 Enclosure Thread Lubrication .................................................................................... 6-23

6.4 NON-FIELD-REPLACEABLE ITEMS ............................................................................6-23

6.5 ASSEMBLY REMOVAL AND REPLACEMENT ...........................................................6-24

6.5.1 Electronics Module Removal and Replacement...........................................................6-24

6.6 MAINTENANCE RECORDS..........................................................................................6-25

6.7 RECOMMENDED SPARE AND REPLACEMENT PARTS ............................................ 6-25

6.8 SOFTWARE COMPATIBILITY ...................................................................................... 6-26

6.9 RETURN SHIPMENT .....................................................................................................6-26

7.0 CIRCUIT DESCRIPTION .....................................................................................................7-1

7.1 ELECTRONICS ASSEMBLY............................................................................................. 7-1

7.2 THEORY OF OPERATION................................................................................................ 7-3

7.2.1 Thermocouple/Millivolt Input ........................................................................................ 7-3

7.2.2 RTD/OHMS Input....................................................................................................... 7-3

7.2.3 Signal Conversion........................................................................................................ 7-4

7.2.4 Communication Format ................................................................................................7-4

8.0 MODEL DESIGNATION AND SPECIFICATIONS ...........................................................8-1

8.1 MODEL DESIGNATION................................................................................................... 8-1

8.2 ACCESSORIES ................................................................................................................. 8-2

8.3 SPECIFICATIONS............................................................................................................ 8-5

8.3.1 Mechanical ................................................................................................................8-5

8.3.2 Functional and Performance ........................................................................................8-5

8.3.3 Two-Wire Cable......................................................................................................... 8-7

8.3.4 Sensor Inputs ............................................................................................................. 8-8

8.3.5 Environmental ............................................................................................................8-8

8.3.6 Hazardous Area Classification..................................................................................... 8-9

8.3.6.1 CSA Hazardous Locations Precautions .............................................................8-11

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CONTENTS UM344-2

SECTION AND TITLE PAGE

9.0 GLOSSARY........................................................................................................................... 9-1

September 1995

UM344-2 CONTENTS

SECTION AND TITLE PAGE

A.0 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS ...................................................A-1

B.0 APPENDIX B - HAZARDOUS AREA INSTALLATION .................................................. B-1

WARRANTY..............................................................................................................................W-1

PARTS LIST

LIST OF ILLUSTRATIONS

FIGURE AND TITLE PAGE

1-1 Basic Model 344....................................................................................................................... 1-2

1-2 Terminal Connections................................................................................................................ 1-3

2-1 Moore XTC Communicator (MXC)............................................................................................ 2-2

2-2 Major MXC Menu Screens ........................................................................................................2-2

2-3 Parameter Map, MXC/Model 344.............................................................................................. 2-9

3-1 Bench Test Connections............................................................................................................ 3-2

3-2 Typical Field Test Connections ...................................................................................................3-2

4-1 Point-To-Point Network (Analog Mode) .....................................................................................4-5

4-2 Model 352 SLDC and Model 344 Connections (Analog Mode)..................................................... 4-6

4-3 Multi-Drop Network (Digital Mode)........................................................................................... 4-7

4-4 Supply Voltage versus Network Resistance................................................................................ 4-8

4-5 Dimensions, Mounting Bracket for Model 344 ........................................................................... 4-17

4-6 Model 344 Mounting Configurations with Supplied Bracket ........................................................ 4-18

4-7 Transmitte r -To-Process Mounting........................................................................................... 4-21

4-8 Sensor Assembly ....................................................................................................................4-22

4-9 Digital Meter Orientation and Mounting Hardware....................................................................4-24

4-10 Digital Meter Repositioning and Removal................................................................................4-25

4-11 Conduit Drain and Explosion Proof Installations.......................................................................4-27

4-12 Signal (Loop), Sensor, MXC and Test Terminals .....................................................................4-30

4-13 Model 344 Sensor Wiring ....................................................................................................... 4-31

5-1 Model 344 Digital Meter .......................................................................................................... 4-32

6-1 Bench Calibration Connections ...................................................................................................6-4

6-2 Field Calibration Connections ..................................................................................................... 6-4

6-3 RTD/Ohm Current Source Calibration Set Up............................................................................. 6-8

6-4 TC/mV Input Accuracy Check and Calibration Set Up................................................................ 6-9

7-1 Model 344 Electronics Module Block Diagram............................................................................ 7-2

8-1 Typical TC and RTD Thermowell Assemblies without Heads ...................................................... 8-3

8-2 Typical TC or RTD Thermowell Assembly with a Head.............................................................. 8-3

8-3 Model 344 Dimensions .............................................................................................................. 8-6

September 1995

CONTENTS UM344-2

SECTION AND TITLE PAGE

LIST OF TABLES

4.1 Operating Mode and Network Type ........................................................................................... 4-3

4.2 Thermocouple and Extension Grade Wire Characteristics ..........................................................4-32

5.1 Output Display Code Choices...................................................................................................5-12

6.1 Self -Diagnostics Troubleshooting.............................................................................................. 6-16

6.2 Message - No Transmitter Found.............................................................................................6-17

6.3 Message - Communication Error ..............................................................................................6-18

6.4 Message - Field Device Malfunction.........................................................................................6-19

6.5 Symptom - Zero or Low Output ...............................................................................................6-19

6.6 Symptom - High Output...........................................................................................................6-20

6.7 Symptom - Output Current Fixed Below Scale at Approximately 3.84 mA ..................................6-21

6.8 Symptom - Output Current Fixed Above Scale at Approximately 21.8 mA ..................................6-11

6.9 Symptom - Erratic Output........................................................................................................6-11

8.1 Model 344T Model Designation ..................................................................................................8-1

8.2 General Accessories.................................................................................................................. 8-2

8.3 Thermal Sensors ....................................................................................................................... 8-2

8.4 Replacement Thermocouples and RTDs for 344T Temperature Elements .....................................8-4

8.5 Thermocouple Wire ...................................................................................................................8-4

8.6 Sensors: Type, Range, Span, and Accuracy................................................................................. 8-5

CHANGES FOR ISSUE 1, OCTOBER 1996

Section 8.3.2 At “Maximum Loop Voltage”, reference to Ex N use added.

Section 8.3.6 Ex N requirement added.

The cover date has been changed, however, page dates were not changed at this time. Change bars were placed on revised pages in the outside margins.

XTC is a trademark of Moore Products Co. HART is a registered trademark of the HART Communication Foundation. All other trademarks are the property of their respective owners.

Moore Products Co. assumes no liability for errors or omissions in this document or for the application and use of information included in this document. The information herein is subject to change without notice.



September 1995

CONTENTS UM344-2

September 1995

1-1

UM344-2 INTRODUCTION

1.0 INTRODUCTION

This User’s Manual is for the XTC™ Model 344 Smart Temperature Transmitter. It covers both the Transmitter-Controller and Transmitter only versions.

NOTE

Throughout this Manual the term Transmitter will include both versions except when the Transmitter-Controller is specifically stated and when discussing unique Transmitter-Controller features, such as the Controller function block.

All information needed to bench test, install, configure, system test, and service a transmitter is included in this User’s Manual. Figure 1-1 shows the basic Model 344. Figure 1-2 shows the two terminal strips for loop, sensor, display, and test equipment connections .

IMPORTANT

Save this User's Manual for installing, configuring, operating and servicing

a Model 344 transmitter.

1.1 SECTION CONTENTS

Nine sections make up this Manual. A brief description of each section follows.

Section 1, INTRODUCTION, describes each section in this Manual and provides a brief description of the Model 344 Smart Temperature Transmitter line.

Section 2, XTC COMMUNICATOR (MXC), describes use of the MXC to test, configure, and calibrate a transmitter.

Section 3, INITIAL TRANSMITTER SETUP, provides procedures to perform a bench test of the transmitter to ensure pr oper operation of all functions. Start-up configuration is described here. If desired, go to Section 5 to perform a complete configuration.

Section 4, INSTALLATION, furnishes specific information for mechanical and electrical installation.

Section 5, ON-LINE AND OFF-LINE OPERATION, describes on-line and off-line configuration, and the use of the transmitter’s zero and full-scale pushbuttons.

Section 6, CALIBRATION AND MAINTENANCE, provides calibration procedures for analog and digital modes. It also furnishes preventive maintenance, troubleshooting, and assembly replacement procedures. A spare and replacement parts list is provided at the back of this Manual.

Section 7, CIRCUIT DESCRIPTION, contains an assembly level circuit description to support transmitter servicing.

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1-2

INTRODUCTION UM344-2

4 Places

Section 8, MODEL DESIGNATION AND SPECIFICATIONS, furnishes tables describing transmitter model numbers, and it contains mechanical, functional, performance, and environmental specifications. Hazardous area certifications are also lis ted.

Before installing or servicing a transmitter, read the information on the nameplate and ensure that the correct model is at hand and that the correct procedures are followed.

Section 9, GLOSSARY, contains definitions of various transmitter related terms.

APPENDIX A describes transmitter function blocks and the parameters available.

APPENDIX B contains hazardous area installation drawings and information needed for barrier selection.

WARRANTY contains the product warranty statements and information concerning servicing of the product during the warranty period.

PARTS LIST shows an exploded view of the transmitter and a list of on-hand spare parts and field replaceable parts.

Rotate Nameplate to Access Zero

and Full Scale Pushbuttons

Electrical Entrance

1/2 NPT or M20 X 1.5

Tapped Hole

2 Places

Z FS

Digital Meter Option Electrical Connections

Enclosure Cap

Quanitity 2

Mounting Hole

1/4-20 Thread

FIGURE 1-1 Basic Model 344

X02801S1

Ground Connection

TESTSIGNAL

+ -

321

Terminal

Strips

Shown with Enclosure

Cap Removed

September 1995

1-3

UM344-2 INTRODUCTION

Ohms,or mV Input

MXC

Connections

Signal (+)

Terminal

Signal (-)

Terminal

Test (+)

Terminal

SIGNAL

TEST

Test (-)

Terminal

Ground

Screw

Notes:

Sensor Terminals for Thermocouple, RTD,

1. Viewed with enclosure cap removed.

2. MXC = Moore XTC Communicator.

X02869S1

FIGURE 1-2 Terminal Connections

1.2 PRODUCT DESCRIPTION

The Model 344 Temperature Transmitter, shown in Figure 1-1, is a microprocessor -based measurement and control device which combines accurate, reliable temperature measurement and a PID controller in one unit. The Transmitter accepts an RTD, thermocouple, millivolt, slide wire or resistance sensor input. It contains a custom ASIC (Application Specific Integrated Circuit) which contains standard temperature calibration curves for J, K, E, T, R, S, B and N type thermocouples and US/DIN curves for 100, 200, and 500 ohm Platinum RTDs. The sensed signal is linearized and corrected for ambient temperature changes by the microprocessor and then converted to an equivalent 4-20 mA or HART® (Highway Addressable Remote Transducer) digital output signal.

The analog output signal, HART digital communications, and 24 Vdc power (typical) are carried on a twisted-pair 2-wire cable. The HART digital communication signals are superimposed (AC coupled) onto the 4-20 mA loop current allowing simultaneous communication with the Transmitter without compromising loop integrity. A digital meter is available when local indication of transmitter output is required. Loop wiring connections made to the electrical terminals shown in Figure 1-2.

A transmitter can be configured to operate in either an analog mode or a digital mode, for a Point-To-Point or a Multi-Drop network respectively.

ANALOG MODE: A single transmitter is connected to a controller, recorder or other field device. A loop known as a Point-To-Point Network interconnects the instruments. The transmitter's output is the process variable and it is sent to a controller or recorder using a standard 4-20 mA analog current.

September 1995

1-4

INTRODUCTION UM344-2

The HART protocol is used for communication between the transmitter and a Moore XTC Communicator (MXC), a personal computer running MXTC Configuration Software or other remote device. A typical communication can be to: transfer a new and edited configuration, remotely monitor the process variable, or service a transmitter.

DIGITAL MODE: One to fifteen transmitters can be parallel connected to a Multi-Drop Network using only twisted-pair cable. The HART protocol is employed to send all process variable information to a HART-compatible controller, recorder, or other device.

A mounting bracket is included and permits either pipe mounting (2" pipe) or wall mounting. When attached to a thermowell, the Transmitter can be mounted directly to a process vessel, chamber, or flow pipe.

1.3 CONFIGURATION

A smart transmitter must be configured before being used on-line or off-line. Each transmitter is shipped with either a default configuration or, if specified at time of order, a custom configuration defined by the user. A default configuration may need to be edited by the user befor e the transmitter is used in a loop.

1.4 PRODUCT SUPPORT

Product support can be obtained from the Moore Products Co. Technical Information Center (TIC). TIC is a customer service center that provides direct phone support on technical issues related to the functionality, application, and integration of all products supplied by Moore Products Co.

To contact TIC for support, either call 215-646-7400, extension 4TIC (4842) or leave a message in the bulletin board service (BBS) by calling 215-283-4958. The following information should be at hand when contacting TIC for support:

• Caller ID number, or name and company name

When someone calls for support for the first time, a personal caller number is assigned. This number is

mailed in the form of a caller card. Having the number available when calling for support will allow the TIC representative taking the call to use the central customer database to quickly identify the caller’s location and past support needs.

• Product part number or model number and version

• If there is a problem with a product’s operation:

• Is the problem intermittent or constant?

• What steps were performed before the problem occurred?

• What steps have been performed since the problem occurred?

• What symptoms accompany the problem? Is an error message displayed?

• What is the installation environment? For example:

- type of plant and process, involved loop, control strategy, and related equipment.

- workstation or personal computer manufacturer and model, amount of memory, and operating system.

For product support outside of North America, contact your nearest Moore Products Co. subsidiary.

September 1995

UM344-2 XTC COMMUNICATOR

Personal Computer

2.0 XTC COMMUNICATOR

The Moore XTC Communicator (MXC) is a HART protocol-based, hand-held instrument capable of communicating with HART conformant instruments from Moore Products Co. and from other manufacturers. It provides full access to on-line and off-line configuration data and to monitoring of process variables. An MXC is shown in Figure 2-1.

When used with HART-conformant field instruments, the MXC can:

• Store up to 100 instrument configurations in its non-volatile memory.

• Download a stored configuration from the MXC to an on-line instrument (e.g., a transmitter).

• Upload a configuration from an on-line instrument to the MXC

• Store configurations created at and downloaded from a personal computer running Moore XTC

Configuration Software.

• Communicat e with a field instrument from any point in the loop.*

Stored Configurations (Archives)

X02856S0

Configuration Transfer

MXC

Moore XTC Communicator

Configuration Transfer

Model 344

Temperature Transmitter

The MXC and the field instruments with which it communicates use the HART protocol for remote communications. HART uses Frequency Shift Keying (Bell 202 standard) to superimpose digital signaling on the standard 4-20 mA analog signal. Since there is no net energy change, the analog signal will not be disturbed and loop integrity is maintained.

An MXC can be used on-line and off-line. On-line, it can display process data from a field instrument or transfer a configuration between the MXC and a field instrument. Off-line, it is used to create a configuration or to edit a configuration stored in the MXC. Off-line, an MXC can communicate with a personal computer to transfer configurations between the MXC and personal computer.

In the following sections, MXC hardware and software will be described. Included in this description will be the display, keypad, wiring, and power requirements. In addition, at the end of this section, major MXC menu screens are shown in Figure 2-2 and Model 344 parameters accessible through the MXC are shown.

* Between the sense resistor and instrument in a non-hazardous area installation. Between the sense resistor and a barrier

in a hazardous area installation.

September 1995

XTC COMMUNICATOR UM344-2

2-2

MOORE XTC COMMUNICATOR

ON F1

TRANS.

VAR'S

CHANGE

VALVE

A/M

TUNE

BACK

LIGHT SHIFT SHIFT SHIFT

TREND ZOOM

A B C

J K L

S T U V W X Y Z #

@ % &

F2 F3

STATUS

D E F G H I

2 3

M N O P Q R

8 9

SPACE0+ / *

OFF

X02665O0

Figure 2-1 Moore XTC Communicator (MXC)

September 1995

UM344-2 XTC COMMUNICATOR

2.1 DISPLAY

The MXC has a 5 by 8 dot matrix Liquid Crystal Display (LCD) with four lines of twenty characters each to show configuration parameters, operating status , on-line variables, and trends. The LCD has a back light that can be turned on for viewing in dimly lighted

SELECT BLOCK TO EDIT

- SENSOR INPUT SELPREV NEXT END ECT

areas.

All MXC screens have a similar layout. As shown here, most configuration screens use the top two lines to describe the current screen, and the lower two lines to show the selections available from this screen. Selections are entered by pressing keys on the MXC keypad. Some on-line variable and trend screens are slightly different from that shown here, but they will always have a selection to access the next screen.

A blinking infinity symbol (∞) at the lower right corner of the screen indicates that the MXC is communicating with a field instrument or a personal computer. No keyboard keys should be pressed until the symbol is cleared upon completion of the communication.

2.2 KEYPAD DESCRIPTION

The thirty-key keypad is shown in Figure 2-1. It contains dedicated keys, alphanumeric keys with shift keys, and function keys. These keys are color coded as follows:

Ÿ Red - dedicated ON key Ÿ Black - dedicated OFF key Ÿ Gray - function keys and dedicated keys (for controller block, on-line monitoring, and MXC functions) Ÿ White - dedicated alphanumeric, symbol, and shift keys

A dedicated key performs a given function no matter what screen is showing. A function key is dependent upon the action being performed and the MXC's firmware; available selections are shown on the screen's bottom two lines.

2.2.1 Dedicated Keys

ON - This key powers up the MXC and initiates the MXC self -test. Press and hold the key until the Moore logo appears and then release it. If the MXC fails self -test, a warning message will be displayed.

The MXC will now show the options available: communicate with a field instrument or personal computer or do off-line configuration. These topics are discussed further in Section 5.

To conserve battery power, the MXC will shut off after 10 minutes if no keypad key is pressed. This auto-shut-off is disabled when the MXC is on-line (e.g., displaying a process variable).

OFF - This key powers down the MXC. It may be used at any time. During configuration, however, care should be taken so important information is not discarded. When the MXC is in certain modes and communicating with a field instrument or personal computer, it will query the user as to whether or not it should be turned off in this mode.

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XTC COMMUNICATOR UM344-2

2-4

BACK LIGHT - This key turns on the LCD back light for easier viewing of the display in a dimly lighted area. The back light is activated by pressing the key and is deactivated by again pressing the key.

NOTE

The back light consumes significant power. To extend battery life, use

the back light only when needed.

TRANS. VAR'S. - The Transmitter Variables key is a quick access key that is pressed to display a screen showing the transmitter's on-line parameters: measured variable (MV), current output (I), process variable (PV) and their respective units. Exit this screen by again pressing the TRANS. VAR'S. key or by pressing the F4 key, for END. If the transmitter is conf igured as a transmitter-controller you will be prompted to choose either transmitter variables or controller variables. Controller variables include process variable, setpoint and valve.

TREND - The TREND key is another quick access key that is pressed to trend a variable and show up to thirteen samples. Any one of the following variables can be trended: the measured variable (MV), the current output (I), or the process variable (PV). The trend sampling rate can be set to 1-300 seconds between samples. Exit this screen by again pressing the TREND key or by pressing the F4 key, for END.

ZOOM - The ZOOM key is a quick access key that allows a closer examination of a variable chosen in the Trend screen. This key functions only when a Trend screen is displayed.

ZOOM magnifies a range of values equal to 10% of the span. The midscale value is user selected. For example, when viewing a range of 0-100% in the Trend screen, the value of 50% is chosen to zoom on. The Trend screen now shows a range of 45-55%. Exiting the Zoom screen again displays the Trend screen. Exit the Trend screen to return to the Main Menu.

STATUS - The STATUS key is a quick access key that is pressed to display the Status screen. This screen will show the instrument tag name, model number, software revision number, serial number, and functional statuses such as fixed current mode and error conditions. Exit the Status Screen by again pressing the Status key or by pressing the F4 key.

CHANGE SP, CHANGE VALVE, A/M, and TUNE Keys - These are dedicated keys that are reserved for use with XTC Model 340 and 344 Transmitter-Controllers. These keys are inactive when communicating with an instrument that does not have a controller function block.

CHANGE SETPOINT - Press the CHANGE SP key to view and change the value of the online setpoint of the controller in either automatic or manual mode. If the controller is in MANUAL with tracking setpoint, then the setpoint cannot be changed. The SP is displayed in the same units as the transmitter dis play configured in the operator’s display function block. Press the “CHANGE SP” key again, or F3, to exit this mode.

CHANGE VALVE - This key allows you to view and change the position of the valve. If the controller is in AUTO, the valve cannot be changed. Press the “CHANGE VALVE” key again, or F3, to exit this mode.

September 1995

UM344-2 XTC COMMUNICATOR

AUTO/MANUAL - The A/M key toggles the controller between automatic and manual control.

Press the “MANUAL”, key F1, or “AUTO”, key F2 to change state. Press “A/M” key again, or F4, to exit this mode.

TUNE - This key allows tuning of the controller. The first screen displays the controller action, DIRECT or REVERSE. The controller action may be viewed from the TUNE key, but it must be changed in the configuration mode. Press F4 to continue.

The Proportional Gain (PG), Time Integral (TI) and Time Derivative (TD) can be changed from this screen. Press F1, F2 or F3 to display the current value and edit the parameter. Press “CONT”, key F4 to continue.

The Derivative Gain (DG) and Manual Reset (MR) can be changed from this screen. Press F1 or F2 to display the current value and edit the parameter. Press F4 to go to the previous screen. Press the “TUNE” key again, or F3, to exit this mode.

ALPHANUMERIC Keys - Twelve white keys with alphanumeric characters and symbols are located toward the center of the keypad area. Pressing a 1-9, 0, -, or . key will display that character on the screen. These keys also have alphabetic characters and symbols that require the use of a SHIFT key. These numbers, letters and symbols are typically used in writing a range, damping value, tagname, message, or descriptor.

SHIFT Keys - Three shift keys are located below the alphanumeric keys. They are used to access a letter or symbol located in the upper left, center, or right portion of an alphanumeric key. To select an alphabetic character or upper symbol, press the proper SHIFT key (left, center, or right arrow) and then press the desired alphanumeric or symbol key.

2.2.2 Function Keys

F1, F2, F3, and F4 - The function keys are the gray keys located just below the MXC display. The function or action performed by each key is shown on the bottom two lines of the display, immediately above each key. For example, when the MXC is first turned on and the Main Menu screen appears, the following selections are aligned with the function keys: F1 - FIND XMTR, F2 - ARCH FUNC, F3 - TEST MXC, and F4 - END. To make a selection, press the corresponding Function key and the next screen will appear. These keys are used extensively when configuring or monitoring a field instrument.

SELECT FUNCTION

FIND ARCH TEST XMTR FUNC MXC END

September 1995

XTC COMMUNICATOR UM344-2

2-6

2. Connect the MXC only in a non-hazardous area.

2.3 LOOP CONNECTION

The MXC is quickly connected into a transmitter loop. A 40" (1m) cable with a dual banana plug on one end and two mini-grabber clips on the other is provided. The dual banana plug is inserted into the bottom of the MXC. The mini-grabber clips are connected to the Model 344's signal terminals or to the loop's current sense resistor, usually at a receiving instrume nt such as a Model 352 Single -Loop Digital Controller (see notes below). This is a non-polar connection. The MXC can now communicate with the transmitter from the control room or a field location. The diagram below shows a basic loop with the MXC connected at various locations.

NOTE

The HART protocol requires a network (loop) resistance between 250Ω and 1100Ω to support communications. See Section 4.3.5 to determine resistance value.

IMPORTANT

In a hazardous area installation, connect the MXC on the safe side of the barrier, between the current sense resistor and the barrier.

Current Sense Resistor, 250 to 1100 Ohms

Controller, Recorder, Indicator, or other Device

Notes:

1. Connect an MXC to any of the locations shown.

+ _

MXC

X02849S1

MXC

Signal Test

Model 344

Terminals

September 1995

UM344-2 XTC COMMUNICATOR

2.4 POWER

Six "AA" alkaline batteries are supplied with the MXC. Remove the rear cover to access the battery compartment, as shown in the figure. Typical operating time of the MXC with new batteries and the back light off is approximately 80 hours; with new batteries and the back light on, approximately 30 hours.

A Low Battery indicator (LB) is displayed in the lower right corner of the LCD when about one -half of the battery charge is spent. Fresh batteries should then be available for installation.

Battery Access Cover

Batteries

Captive Screw

NOTE

If the MXC fails due to low batteries, data in the On-Line

Memory section of the MXC will be lost. The MXC should not be used to troubleshoot critical loops while the low battery indicator is showing.

The MXC will automatically conserve battery life when in the configuration mode. After approximately ten minutes with no keys on the keypad being pressed, the MXC will shut itself off. This will not occur while the MXC is monitoring variables from a field instrument.

2.5 MXC SOFTWARE VERSION

To read an MXC's software version, perform the following steps.

1. Press and hold the MXC's ON key until the MOORE logo appears on the display.

2. Watch the MXC display. The MXC's software version will be momentarily displayed.

3. Press the OFF key or continue on to configure or monitor a transmitter.

2.6 MXC MENU SCREENS AND PARAMETER MAP

Major MXC menu screens are shown in Figure 2-2. The screen's name appears in the left column. These screens are shown in block form in Figure 2-3.

Figure 2-3 is a Parameter Map which shows general configuration and calibration flow. Detailed configuration procedures are given in Section 5 of this Manual. Calibration is described in Section 6.

September 1995

XTC COMMUNICATOR UM344-2

2-8

OVRD

QUIT SAVE VIEW LOAD

Main Menu

On-Line Menu

On-Line Configuration Menu

Calibrate/Test Menu

Function Block Menu

Configuration Complete Menu

Loop Override Menu

MXC screens X02781S0

SELECT FUNCTION

FIND ARCH TEST XMTR FUNC MXC END

Dev ID: 210300003C Tag: TTC-101 ADD: 00

LOOP CAL/ CON -

TEST FIG

CONFIGURATION MODE

END

EDIT EDIT ARCH CONF END

CALIBRATE / TEST

CAL TEST END

SELECT BLOCK TO EDIT

- SENSOR INPUT SELPREV NEXT END ECT

CONFIGURATION COMPLETE RE- DOWN

LOOP OVERRIDE - CHOOSE CURRENT OUTPUT LEVEL

4 MA 20 MA OTHR END

FIGURE 2-2 Major MXC Menu Screens

September 1995

UM344-2 XTC COMMUNICATOR

MAIN MENU

TEST

MXC

MXC SELF TEST MENU

TEST

KEYS

TEST

SCRN

END

ON-LINE MENU

LOOP OVRD

PROCEED

LOOP OVERRIDE

20mA

4mA

ABORT

ENTER

END

ABORTABORT

ENTER

END

ANA-

LOG

FIND

XMTR

DIGI

-TAL

SRCH

TAG

ENTER

TAG

END

NOTE: This Map is intended to show

general configuration and calibration flow. Every key and screen is not shown.

SHORT

ADDR

POLL

END

CALIBRATE/TEST MENU

CAL/ TEST

CONF

CAL

TEST

END

ON-LINE CONFIGURATION MENU

EDIT

ARCH

EDIT

CONF

END

OTHER

PROCEED

ABORT ABORT

ENTER ARCH#

QUIT

ENTER

SELF TEST

CONT

ABORT

END

PRO-

CEED

DOWN

LOAD

END

EDIT

ARCH

CONT

ABORT

DOWN

LOAD

QUIT

CONT CONT

TRIM

DAC

ZERO

ABORT

CONT

ABORT

ARCH

FUNC

END

X02882S1

September 1995

ENTER ARCH#

RE-

START

EXIST

NOT

EXIST

TEMPERATURE TRANSMITTER

SELECT

TYPE

END

EDIT

ARCH

END

CONT

END

FUNCTION BLOCK MENU

END

SENSOR INPUT

OUTPUT

OPERATOR DISPLAY

TRANSMITTER ID

ALARM

SP TRACK & HOLD

A/M TRANSFER

CONTROLLER

FIGURE 2-3 Parameter Map, MXC/Model 344

CONFIGURATION COMPLETE MENU

SAVE

REVIEW

DOWN

LOAD

QUIT

DOWN

LOAD

ABORT

XTC COMMUNICATOR UM344-2

2-10

September 1995

UM344-2 INITIAL TRANSMITTER SET-UP

3-1

3.0 INITIAL TRANSMITTER SET-UP

Before operating a Model 344 on-line, the instrument should be commissioned using the MXC and set-up either at the bench or in the field. Commissioning consists of checking that the transmitter and the loop are operational and that all configuration information is correct. This section contains step-by-step procedures describing commissioning of the transmitter. For an in -depth discussion of transmitter configuration, refer to Section 5.1 On-Line Operation.

3.1 COMMISSIONING TRANSMITTER ON THE BENCH OR IN THE FIELD

A Model 344 can be commissioned either before or after installation into the loop. Commissioning on the bench before installation is suggested. A complete transmitter functional test can be performed and configuration procedures can be practiced. If commissioning after installation, install the transmitter as described in Section 4 and then return to this section. Configuration data for the transmitter will be needed.

To commission the transmitter on the bench, make the connections shown in Figure 3-1. To commission the transmitter in the field, make the connections shown in Figure 3-2 or those shown in Section 4.3.3, Figure 4-1, 4-2, or 4-3. Connect the MXC in the loop either across the current sense resistor or, often more conveniently, across the two signal terminals of the Model 344 (non-hazardous area only).

3.1.1 Test Equipment Needed

TEST EQUIPMENT DESCRIPTION (see Specifications, Section 8.3.2) Power Supply 12 to 42 Vdc, see Section 4.3.4

Multimeter:

Current

Voltage Current Sense Resistor

Accuracy of at least .05% to check calibration

Range: 4 to 20 mA to measure loop current

Range: 10-40 Vdc to measure power supply and loop voltage 250 to 1100Ω to support HART digital communications

Configuration Device Moore XTC Communicator (MXC) User Configuration Configuration data for transmitter under test

NOTE

Test equipment should be 2 to 10 times more accurate than the desired

transmitter accuracy.

September 1995

INITIAL TRANSMITTER SET-UP UM344-2

3-2

MXC

250

Bench Power Supply (DC)

X02807S1

Signal Test

Model 344

Terminals

Resistance

Decade

Box

Digital Milliammeter

FIGURE 3-1 Bench Test Connections

Controller, Recorder, Indicator, or other 1-5 Vdc Device

System Power Supply

X02808S1

Circuit Junction

250

MXC

Signal

Test

Model 344

Terminals

+ _

Sensor

Wires

Digital Milliammeter

FIGURE 3-2 Typical Field Test Connections

September 1995

UM344-2 INITIAL TRANSMITTER SET-UP

3-3

3.2 ESTABLISHING

COMMUNICATION

SELECT FUNCTION

FIND ARCH TEST XMTR FUNC MXC END

SEARCH FOR WHAT TYPE OF TRANSMITTER? ANA- DIG- SRCH LOG ITAL TAG END

ENTER TAG TO SEARCH WITH: EN < > QUIT TER

1. Connect the transmitter as shown in either Figure 3-1 or 3-2.

2. Apply power to the loop.

3. Press and momentarily hold the MXC's ON key. The first screen that will appear after the initial power up screens is the Main Menu, shown adjacent. Press FIND XMTR (F1) to have the MXC initially establish communication with the Model 344.

4. From the next screen, select either Analog, Digital, or Search Tag to begin communication with the transmitter. Read the following and then press one of the four following keys (F1, F2, F3, or END).

ANALOG (F1) - Press to search for an analog

mode transmitter. Analog mode is used when there is one transmitter in the loop and it has an address of zero. If all Point-to-Point Network connections are correct, when the MXC finds a transmitter with an address of “0”, the MXC will display the ID and TAG. Go to Step 6.

If a problem exists in the Transmitter or Network

Wiring, the MXC will show “NO TRANSMITTER FOUND”. Go to Section 6.3 Troubleshooting to confirm and resolve wiring problems.

DIGITAL (F2) - Press to search for a digital (multi -

drop) mode transmitter. Digital mode allows up to 15 transmitters to be connected to the loop. Each transmitter in a loop is assigned a unique address between 1 and 15. Go to Step 5.

SRCH TAG (F3) - Press to search for a specific

transmitter. Search can be used when the transmitter is in either Analog or Digital mode. Type the tagname (8 character alphanumeric string) of the transmitter that is to be configured or interrogated and press ENTER (F4). To edit the tagname, use the arrow keys to select any character that needs to be changed. Go to Step 6.

If a problem exists in a transmitter or loop wiring the

MXC will show “NO TRANSMITTER FOUND”.

END - Press to return to the previous screen.

September 1995

INITIAL TRANSMITTER SET-UP UM344-2

3-4

SHORT OR LONG FORM ADDRESS? SHRT LONG ADDR ADDR POLL END

ENTER TRANSMITTER ADDRESS (1-15) EN < END TER

ENTER TRANSMITTER ADDRESS: EN < END TER

SEARCHING FOR TRANSMITTER

PLEASE WAIT

XMTR ID: 210100044F TAG: MPCO 340 ADD: 01 LAST NEXT SELXMTR XMTR END ECT

NOTE

Analog and Digital modes are

discussed in detail in Section 4.

5. The MXC will next prompt for a digital method of searching. Press one of the following keys.

SHRT ADDR (F1) - Press and then enter the short

address (1-15) stored during configuration.

IMPORTANT

The factory default setting for the short

address is 0, analog mode.

LONG ADDRESS (F2) - Press and then enter the

long address stored in memory at the factory. (The long address, the Dev. ID shown in the On-Line Menu and the XMTR. ID shown by polling are the same.) This address can not be altered.

POLL (F3) - Press to instruct the MXC to look for

any live addresses on the multi-drop network (1-15). While the MXC is searching for one or more transmitters, it will display SEARCHING. The MXC will then display the long and short addresses of all live transmitters on the network; select one by pressing the SELECT (F4) key.

To view each of the live transmitters, press the

LAST XMTR and NEXT XMTR keys to scroll forward and backward. Each screen will show the transmitter ID number (i.e. device ID or long address in hexadecimal), tagname, and short address. Check IDs against user documentation to confirm that all transmitters are present

If a problem exists in a transmitter or its wiring it will

be excluded from the poll. If a major fault exists in the network wiring, the MXC will display the warning message “NO TRANSMITTER FOUND”. Go to section 6.3 Troubleshooting to confirm and resolve wiring problems.

6. Communication has now been established between the transmitter and MXC and the transmitter's configuration has been uploaded to the MXC's OnLine Memory.

September 1995

UM344-2 INITIAL TRANSMITTER SET-UP

3-5

OVRD

The next screen to appear is used to save the

WOULD YOU LIKE TO SAVE TRANSMITTER DATA IN ARCHIVES NO YES

configuration to an archive. If the configuration is to be edited, press YES (F4) to save the configuration in case a mistake is made. The next screen will prompt for an archive number (0-99). The archive number chosen will be the location where the MXC

ENTER ARCHIVE NUMBER (0-99): EN < > END TER

stores the transmitter's configuration data. Archiving will be discussed in more detail in the Off-Line portion of section 5.

The MXC can now be used to calibrate or configure the transmitter, monitor loop parameters, or test loop

Dev ID: 210300003C Tag: TTC-101 ADD: 00

LOOP CAL/ CON -

TEST FIG

END

functionality. Section 5 of this Manual describes configuring and monitoring of the transmitter, and calibration is described in Section 6. The screen selections to choose the options of configuration, calibration, and loop checkout are found on the On-Line menu screen.

3.3 TESTING THE TRANSMITTER, MXC, AND THE LOOP

The test routines available through the MXC are used to verify that the Transmitter, the MXC , and the loop are all working properly. Whenever a problem with any of the instruments or the loop is suspected, test the equipment to make sure there are no component failures. The test functions can be accessed in two locations in the MXC, and these are described below.

3.3.1 MXC Testing

SELECT FUNCTION

FIND ARCH TEST XMTR FUNC MXC END

MXC SELF TEST

PRESS ANY KEY TO CONFIRM CONTACT _ _ _ _ _ _ _ _ _ _ END TEST

1. Press and momentarily hold the MXC's ON key. The Main Menu will appear.

TEST TEST KEYS SCRN END

2. Press TEST MXC (F3) to display the MXC Self Test screen.

3. Press one of the following keys.

TEST KEYS - Press to test MXC keys. At the next

screen, press any key on the keyboard and the

September 1995

INITIAL TRANSMITTER SET-UP UM344-2

3-6

screen will display a character associated with that key. The screen will show up to 10 characters before erasing the oldest.

September 1995

UM344-2 INITIAL TRANSMITTER SET-UP

3-7

MXC SCREEN TEST ABOUT TO BEGIN

MXC SCREEN TEST COMPLETED

3.3.2 Transmitter Testing

CALIBRATE / TEST

CAL TEST END

TEST - PERFORMS DIAGNOSTIC TEST ON TRANS- A- PROMITTER BORT CEED

WARNING! SELF TEST MAY BUMP TRANSMITTER OUTPUT A BORT CONT

TRANSMITTER PASSED TRANSMITTER SELFTEST

CONT

TEST SCRN - Press to test all screen segments.

When this key is pressed, the MXC displays the "Begin" message to the left, then lights all the segments, turns them all off, displays the "Completed" message, and the n returns to the original test screen.

END - Press to exit the test mode and return to the

Main Menu screen.

Although the Transmitter continuously performs an online self test, a more extensive self test can be performed after communication with the MXC has been established.

1. At the On-Line Menu, press CAL/TEST (F2) to display the Calibrate and Test selections.

2. At the Calibrate/Test Menu, press TEST. A Test caution screen will appear. Press one of the following:

ABORT - Press to return to the Calibrate/Test

Menu.

PROCEED - Press to continue the self test. A

warning screen will be displayed then a message states that the test is occurring. After the test, the MXC will show whether or not the transmitter has passed or failed the self test.

If the MXC indicates that the Transmitter has: Passed - Press CONT then END. Failed - Check installation wiring thoroughly. Go to

Section 6 for troubleshooting suggestions.

3. When the MXC displays the Transmitter’s ID (OnLine Menu), press the STATUS Key to check for Transmitter errors. If an error is present, the ERROR Key (F2) will be displayed. Press ERRORS (F2) to check for ROM, RAM, EEPROM, TIMER and SENSOR errors. Refer to Section 6.3 Troubleshooting to confirm and resolve the error.

4. If the alarm function is enabled, press ALARM (F1) to check the ALARM OUT OF SERVICE status.

September 1995

INITIAL TRANSMITTER SET-UP UM344-2

3-8

OVRD

3.3.3 Loop Testing

Testing the loop involves making sure that the Transmitter is sending out the proper current signal and that the other elements in the loop are receiving this signal. The Loop Override mode is used to test the loop.

LOOP OVERRIDE SETS TRANSMITTER OUTPUT

TO ENTERED VALUE END CONT

1. At the On-Line Menu, press LOOP OVRD. The adjacent screen will be displayed. Press CONT and then PROCEED.

2. Choose either 4 mA or 20 mA from the menu, or

WARNING! SELF TEST MAY BUMP TRANSMITTER OUTPUT A BORT CONT

choose OTHR to enter another value. After a value is entered, the Transmitter will output the value chosen. Read the analog current value on a:

Ÿ Recorder or control station in the loop Ÿ Milliammeter connected in series in the loop

LOOP OVERRIDE - CHOOSE CURRENT OUTPUT LEVEL

4 MA 20 MA OTHR END

Ÿ Milliammeter connected to the TEST terminals

(Figures 3-1 and 3-2)

Ÿ Analog Voltage may be read on a voltmeter

connected across the sense resistor.

NOTE

This is intended as a functional test. To check calibration accuracy a DMM of at least .05% accuracy must be used.

If the transmitter is not working properly, try to

recalibrate it (see Section 6.1).

3.4 REVIEW CONFIGURATION DATA

Dev ID: 210300003C Tag: TTC-101 ADD: 00

LOOP CAL/ CON -

TEST FIG

END

Before placing the Transmitter on-line, check that the proper configuration information has been stored.

1. Establish communication between the Transmitter and MXC.

2. Using the MXC screens, compare the uploaded configuration with user's configuration documentation.

September 1995

UM344-2 INITIAL TRANSMITTER SET-UP

3-9

1) At the On-Line Menu, press CONFIG to access

the function blocks. Continue through the menu sequence until reaching the Function Block Menu.

2) Check the information in the eight function

blocks listed below. Edit values as needed while reviewing.

3. Archive the revised configuration in the MXC

4. Download the configuration to the Transmitter.

TRANSMITTER FUNCTION BLOCKS*

SENSOR INPUT

Input Type Measured Variable Units Range Lo & Hi Damping Burnout Direction

OPERATOR DISPLAY Process Variable Units Range Lo & Hi Auto Rerange Local Display Code

TRANSMITTER ID Tag Descriptor Message Date Device Serial Number Short Address

OUTPUT Failsafe Level

ALARM Alarm 1 Enable/Disable Alarm 1 SP Alarm 1 Type Alarm 2 Enable/Disable Alarm 2 SP Alarm 2 Type Self Clearing NaKS Alarms Out of Service

September 1995

INITIAL TRANSMITTER SET-UP UM344-2

3-10

SP TRACK & HOLD Tracking Setpoint PUSP

A/M TRANSFER Power-Up Mode Automatic Only Power-Up Valve

CONTROLLER BLOCK Controller ON/OFF Controller Type Action Prop. Gain Time-Integral Time-Derivative Derivative Gain Manual Reset Manual Reset Track

* For more detailed information on these function

blocks, refer to Section 5 and Appendix A.

3.5 CHECKING TRANSMITTER OUTPUT

At this point, check to be sure that the transmitter is reading the proper sensor input in the proper units.

1. Set the sensor input to the transmitter to a known value either by adjusting the process variable to a field mounted transmitter or the simulated input to a bench test transmitter.

VIEW WHICH VARIBLES

2. With the On-Line Menu displayed, press the gray TRANS.VAR’s key on the MXC keypad to display

XMTR CONT

END

the VIEW WHICH VARIABLES screen.

3. Press one of the following keys depending upon

controller activation:

P: 63.301% S: 50.000% V: 10.000%

END

Controller Block ON: Press CONT (F2) to display

the controller variables. P - Process S - Setpoint V - Valve

M: 76.534 deg F I: 4.8377 mA P: 76.534 deg F

END

Controller Block OFF: Press XMTR (F1) to display

the process variables. M - Measured Variable I - Current (mA)

September 1995

UM344-2 INITIAL TRANSMITTER SET-UP

3-11

P - Process Variable

4. Check these Transmitter Variables to ensure the

readings are correct.

5. Press END (F4) to return to the main menu.



September 1995

UM344-2 INSTALLATION

4-1

4.0 INSTALLATION

This Section describes installation of a Model 344 Temperature Transmitter. Topics include: receipt of shipment, installation considerations, and mechanical and electrical installation.

IMPORTANT

The installation must conform to the National Electrical Code and all

other applicable construction and electrical codes.

Refer to the installation drawings in Appendix B when locating a

Transmitter in a hazardous area.

4.1 EQUIPMENT DELIVERY AND HANDLING

4.1.1 Factory Shipment

Prior to shipment, a Transmitter is fully tested and inspected to ensure proper operation. It is then packaged for shipment. Most accessories are shipped separately.

4.1.2 Receipt of Shipment

Each carton should be inspected at the time of delivery for possible external damage. Any visible damage should be immediately recorded on the carrier's copy of the delivery slip.

Each carton should be carefully unpacked and its contents checked against the enclosed packing list. At the same time, each item should be inspected for any hidden damage that may or may not have been accompanied by exterior carton damage.

If it is found that some items have been damaged or are missing, notify Moore Products Co. immediately and provide full details. In addition, damages must be reported to the carrier with a request for their onsite inspection of the damaged item and its shipping carton.

4.1.3 Storage

If a Transmitter is to be stored for a period prior to installation, review the environmental specifications in Section 8.3.5.

September 1995

INSTALLATION UM344-2

4-2

4.2 ENVIRONMENTAL CONSIDERATIONS

Many industrial processes create severe environmental conditions. The conditions at each transmitter location must be within the specifications stated in Section 8.3.5.

The Transmitter is designed to perform in harsh conditions, however, it is prudent to locate a Transmitter to minimize the effects of heat, vibration, shock, and electrical interference.

CAUTION

Exceeding the specified operating temperature limits can adversely affect

performance and may cause damage.

4.3 INSTALLATION CONSIDERATIONS

Sections 4.3.1 and 4.3.2 outline basic considerations needed to achieve a successful mechanical/electrical installation. The remaining sections then provide detailed pre-installation information.

4.3.1 Mechanical

• Select the sensor input: thermocouple, millivolt, RTD, or resistance. Refer to Section 8.2 for sensor

accessories.

• Determine if an optional digital meter for local monitoring of transmitter output is required. Refer to

Section 8.1 for model designation or 8.2 for accessory part numbers.

• Determine physical mounting of Transmitter. Consider:

• Using supplied bracket for pipe or wall mounting. Refer to Sections 4.4.1 and 4.4.2.

• Transmitter-to-process mounting. Refer to Section 4.4.3.

• Clearance for installation and maintenance and for reading the optional digital meter. Refer to

Figure 8-3.

• Need to rotate optional digital meter for viewing ease. Refer to Section 4.4.4.

Refer to Figure 8-3 for transmitter dimensions and the figures in Section 4.4 for typical mechanical

installations. Refer to Section 8.3 for mechanical and environmental specifications.

Ÿ Determine if an explosion-proof or intrinsically safe installation is required. Refer to Transmitter

nameplate for electrical classifications and Sections 8.1, 8.3, and 4.6.

An intrinsically safe installation requires user-supplied intrinsic safety barriers that must be installed in

accordance with barrier manufacturer's instructions for the specific barriers used.

Transmitter certification is based on the "Entity" concept in which the user selects barriers that permit

the system to meet the entity parameters.

September 1995

UM344-2 INSTALLATION

4-3

Ÿ Determine conduit routing. Refer to Section 4.4.5.

Ÿ Prepare installation site drawings showing the following: Ÿ Location of the Master Device (e.g. MXC or controller)

Ÿ Location and identification of each Transmitter Ÿ Routing plan of signal cable(s) Ÿ Location of any signal cable junctions for connecting the MXC

4.3.2 Electrical

Ÿ Determine Transmitter operating mode (analog or digital) and type of Network needed; refer to

Section 4.3.3.

Ÿ Determine minimum power supply requirements. Refer to Section 4.3.4.

Ÿ Select twinaxial cable type and determine maximum cable length. Refer to Section 4.3.5.

Ÿ Determine the need for network junctions. Refer to Section 4.3.6.

Ÿ Intrinsically Safe installations will need barriers. Refer to Section 4.3.7.

Ÿ Consider the effect of connecting additional equipment (e.g., recorder, loop powered display) to the

network. Refer to Section 4.3.8.

• Select sensor cable type. Refer to Section 4.3.9.

• Consider the accuracy limitation of a 2-wire RTD. Refer to Section 4.3.10.

• Read Section 4.3.11 for grounding and shielding recommendations.

4.3.3 Transmitter Operating Mode and Network Type

A Transmitter will output either an analog current or an equivalent digital signal, depending upon the selected operating mode. The operating mode also determines the type of Network (Point-To-Point or Multi -Drop) to be installed, as shown in Table 4.1 and the following subsections. Select the operating mode during Transmitter configuration as described in the following subsections and Section 5.

TABLE 4.1 Operating Mode and Network

OPERATING MODE NETWORK TYPE NETWORK FIGURE(S)

Analog Point-To-Point 4-1 and 4-2 Digital Multi-Drop 4-3

September 1995

INSTALLATION UM344-2

4-4

4.3.3.1 Analog Mode

Ÿ The Transmitter outputs a 4-20 mA signal for input to devices such as controllers and recorders.

Ÿ Analog operation employs a Point-To-Point Network comprising a Transmitter, Primary/Secondary

Master, and other non-signaling devices. Transmitter short address is 0 (zero).

Ÿ Use the optional Digital Meter for local indication of transmitter output.

Ÿ The Transmitter is factory configured for analog mode unless otherwise ordered.

Ÿ Use an MXC for configuration, diagnostics, and reporting the current process variable.

4.3.3.2 Digital Mode

Ÿ The number of Allowable Network Elements is: Primary and Secondary Masters - 1 each Transmitters - 1 to 15

Ÿ The process variable is transmitted digitally. The analog output of each transmitter is "parked" at 4

mA.

Ÿ The HART communication source can be a Primary or Secondary Master. A Primary Master can be

used for data acquisition, maintenance, or control purposes. A Se condary Master, the MXC for example, may be used for configuration, diagnostics, and reporting current process variable.

Ÿ Use the optional Digital Meter for local indication of transmitter output.

Ÿ Place the transmitter in the digital mode by assigning it a SHORT ADDRESS from 1 to 15 when

configuring the TRANSMITTER ID BLOCK with the MXC (see Section 5).

September 1995

UM344-2 INSTALLATION

4-5

Network for Non-Hazardous Locations

250 See Note 2

Controller, Recorder, or Other 1-5 Vdc Device; See Note 1

System Power Supply

See Note 3

MXC

_ +

250 See Note 2

See Note 4

Non-Hazardous Location

Network Junction

See Note 5

Hazardous Location

See Note 3

See Note 6

Signal Test

MXC

Model 344

Terminals

See Note 6

Controller, Recorder, or Other 1-5 Vdc Device; Note 1

System Power Supply

See Note 4

Network for Hazardous Locations

Notes:

1. The System Power Supply is shown separate from the host input device. In practice, it may be part of the host input device. The host input device can be either a HART or non-HART signaling device, a Primary Master or a Secondary Master.

2. Network resistance equals the sum of the barrier resistances and the current sense resistor. Minimum value 250 Ohms; maximum value 1100 Ohms.

3. Connect the MXC (a Secondary Master) to the loop only in the non-hazardous location. The MXC is a non-polar device.

4. Interconnect all cable shields and ground only at the power source.

See Note 5

Supply and Return Barriers Shown Above

Signal Test

_ _

Model 344

Terminals

5. For access to Model 344 terminals, remove shorter end cap.

6. Maximum loop cable length calculated by formula in Section 4.3.5.

X02866S1

September 1995

INSTALLATION UM344-2

4-6

6. Maximum loop cable length calculated by formula in Section 4.3.5.

FIGURE 4-1 Point-To-Point Network (Analog Mode)

See Note 2

MXC

250 See Note 1

Non-Hazardous Location

Hazardous Location

See Note 6

Model 352 Rear Terminals See Note 4

Notes:

1. Network resistance equals the sum of the barrier resistances and the current sense resistor. Minimum value 250 Ohms; maximum value 1100 Ohms.

2. Connect the M XC (a Secondary Master) to the loop only in the non-hazardous location. The MXC is a non-polar device.

3. Interconnect all cable shields and ground only at the power source.

4. Model 352 Rear Terminal Assignments A4 - Analog Input 1 (AI1+) A5 - Analog Input Common (AIC) B5 - Two-Wire Transmitter Power (+26 Vdc) AG - Case (Safety) Ground See Installation And Service Instruction SD352 or User's Manual UM352-1

5. For access to Model 344 terminals, remove enclosure end cap.

A5 B5

See Note 3

Supply and Return Barriers Shown Above

Signal Test

Model 344

Terminals

See Note 5

X02867S1

FIGURE 4-2 Model 352 SLDC and Model 344 Connections (Analog Mode)

September 1995

UM344-2 INSTALLATION

4-7

6. For access to Model 344 terminals, remove enclosure end cap.

See Note 4

MXC

250 See Note 2

Non-Hazardous Location

Hazardous Location

Network Primary Master, See Note 1

System Power Supply

Signal Test

_ +

Supply and Return Barriers Shown Above

See Note 5

Signal

Test

See Notes 3 and 6

Signal

Test

Notes:

1. The System Power Supply is shown separate from the host input device. In practice, it may be part of the host input device. The host input device can either be a HART or non-HART signaling device, a Primary Master or Secondary Master.

2. Network resistance equals the sum of the barrier resistances and the current sense resistor. Minimum value 250 Ohms; maximum value 1100 Ohms.

3. A maximum of 15 transmitters may be connected. All must be configured for digital mode.

4. Connect the MXC (a Secondary Master) to the loop only in the non-hazardous location. The MXC is a non-polar device.

5. Interconnect all cable shields and ground only at the power source.

September 1995

Model 344

Terminal

Model 344

Terminal

FIGURE 4-3 Multi -Drop Network (Digital Mode)

Model 344

Terminal

X02868S1

INSTALLATION UM344-2

4-8

Minimum Power Supply Voltage (VDC)

4.3.4 Power Supply Requirements

A power supply is needed to power the Transmitter(s). The power supply can be:

Ÿ A separate stand-alone supply capable of powering several Transmitters. It can be mounted in a

control room or in the field. Follow the power supply manufacturer's recommendations with regard to mounting and environmental considerations.

Ÿ Located in a controller (such as a Primary Master) or other station able to safely provide additional

operating current and meet the power supply specifications of Section 8.3.2.

Determine needed power supply output voltage by calculating the Network Resistance and consulting Figure 4-4. It shows the minimum power supply voltage needed for the calculated Network Resistance.

The total Network Resistance is the sum of the Current Sense Resistance, end-to-end Barrier Resistance (if used), wire resistance, and any other resistances in the loop. The minimum Network Resistance (see Glossary) required to support HART communications is 250Ω. The maximum resistance is 1100Ω.

1650

1200 1100 1000

800

600

Network Resistance (OHMS)

500

250

OPERATING

REGION

10V

12V

17V 20V 24V

30V 34V 40V

42V

X02817S1

45V0

FIGURE 4-4 Supply Voltage Versus Network Resistance

September 1995

UM344-2 INSTALLATION

4-9

4.3.4.1 Point-To-Point Network

Figure 4-4 defines an analog mode Transmitter's operating region for the allowable ranges of supply voltage and network resistance. Perform the following simple calculations to ensure that the power supply output voltage permits the Transmitter to remain within the indicated operating range.

1. Calculate the minimum power supply output voltage.

The minimum network power supply voltage requirement is a function of Network Resistance and full

scale current (22.5 mA), and is calculated by the following formula:

Minimum Power Supply Output Voltage = 12 volts + (0.0225 x Network Resistance in ohms)

Power supply output voltage must be greater than the calculated value. The minimum voltage across

the input terminals of a Transmitter is 12 volts.

2. Calculate the maximum power supply output voltage.

The maximum network power supply voltage is a function of Network Resistance and zero scale

current (3.85 mA), and is calculated by the following formula:

Maximum Power Supply Output Voltage = 42 volts + (0.00385 x Network Resistance in ohms)

Power supply output voltage must be less than the calculated value. The maximum voltage across the

input terminals of a Transmitter should never exceed 42 volts.

4.3.4.2 Multi-Drop Network

Perform the following simple calculations to ensure that the power supply output voltage permits the Transmitter to remain within its operating range.

1. Calculate the minimum power supply output voltage.

Minimum network power supply voltage is a function of Network Resistance and the total current

draw of all transmitters in the Network, and is calculated by the following formula:

Minimum Supply Output Voltage = 12 volts + [(0.004 x number of transmitters on Network) x (Network Resistance)]

Power supply output voltage must be greater than the calculated value. The minimum voltage across

the input terminals of a Transmitter is 12 volts.

2. Calculate the maximum power supply output voltage.

Maximum network power supply voltage is a function of Network Resistance and total current draw

of all the transmitters in the Network, and is calculated by the following formula:

Maximum Supply Output Voltage = 42 volts + [(0.004 x number of transmitters on Network) x (Network Resistance)]

September 1995

INSTALLATION UM344-2

4-10

Power supply output voltage must be less than the calculated value. The maximum voltage across the

input terminals of a Transmitter should never exceed 42 volts.

The maximum number of Transmitters that can be connected to a Multi-Drop Network is fifteen. Each Transmitter is "parked" in a low current draw mode (4 mA) to conserve power. Ensure that the network power supply is capable of sourcing the total current consumed by the number of transmitters on the Network.

4.3.5 Cable Capacitance and Maximum Length

A cable length calculation is necessary when HART communication is to be employed. Cable capacitance directly affects maximum Networ k length.

4.3.5.1 Cable Capacitance

Cable type, conductor size, and recommended cable model numbers are stated in Section 8.3.3 Two-Wire Cable.

Cable capacitance is a parameter used in the calculation of the maximum length of cable that can be used to construct the Network. The lower the cable capacitance the longer the Network can be. Manufacturers typically list two capacitance values for an instrumentation cable:

1. Capacitance between the two conductors.

2. Capacitance between one conductor and the other conductor(s) connected to shield. This capacitance is the worst case value and is to be used in the cable length formula.

4.3.5.2 Maximum Cable Length Calculation

The maximum permissible single-pair cable length is 10,000 feet (3000 meters) or less as determined by the following formula:

65,000,000 Cf + 10,000 L = - R x C C

Formula Definitions:

L: The maximum total length of cable permitted to construct the Network. L = Feet when C is in

pF/ft. L = meters when C is in pF/meter.

R: The Network Resistance which is the ohmic sum of the Current Sense Resistance and Barrier

Resistance (both Return and Supply), if any, in the Network and the resistance of the wire.

September 1995

UM344-2 INSTALLATION

4-11

C: Cable capacitance per unit length between one conductor and the other conductor connected to

the shield. C may be in pF/ft or pF/meter.

Cf: Total input terminal capacitance of Field Instruments; the Primary Master is excluded. Cf is

given by the following formula:

Cf = (sum of all Cn values) x (5000)

Where Cn is an integer (e.g., 1, 2, 3) corresponding to the input terminal capacitance of a Field

Instrument. Cn values are read from the following table. For Field Instruments without Cn values, use Cn = 1

FIELD INSTRUMENT CAPACITANCE Cn VALUE Less than 5000 pF 1

5000 pF to less than 10000 pF 2 10000 pF to less than 15000 pF 3 15000 pF to less than 20000 pF 4 20000 pF to less than 25000 pF 5 25000 pF to less than 30000 pF 6 (Model 344)

Example Calculation:

Assume a Networ k consists of a 344 and a Field Instrument (Cn = 1 and Cn = 6).

Let R = 250Ω, C = 40 pF/ft., Cf = (1 + 6) x 5000 = 35,000

65,000,000 35,000 + 10,000 Then L = - = 5375 feet (1612.5 meters) (250)(40) 40

4.3.6 Network Junctions

A Network Junction is shown in Figure 4-1. It is a wiring junction installed at a convenient point in the loop to facilitate wiring, testing, and troubleshooting. Typically the Junction is a conventional terminal block mounted on a panel with a protective cover, cabinet, or junction box to enclose and protect wiring terminals.

Multiple Junctions can be installed to provide field access terminals for the connection of an MXC.

Note the following:

Ÿ Network with Barriers - Locate a Junction anywhere along the Network in the non-hazardous area

between a barrier and the Current Sense Resistor.

Ÿ Network without Barriers - A Junction may be located anywhere along the Network between the

Current Sense Resistor and Transmitter.

September 1995

INSTALLATION UM344-2

4-12

Ÿ A Junction should be a simple electrical series connection containing NO repeaters or other devices

(active or passive) that can degrade HART communications.

4.3.7 Safety Barriers

Installed safety barriers must comply with the following:

Ÿ Locate intrinsic safety barriers between the system power supply (e.g., Primary Master, if used)

residing in the non-hazardous area and the transmitter(s) in the hazardous area.

Ÿ Combined or separate supply and return barriers may be used.

Ÿ For an intrinsically safe application, the DC voltage applied to the safe side of the barrier must be 0.6

Vdc less than the rated barrier working voltage.

Ÿ An Active Supply Barrier must be operated within its specified input working voltage.

Ÿ Barrier shunt impedance to ground shall not be less than 5000Ω for the HART range of frequencies

(500 Hz to 2500 Hz).

Ÿ Barrier end-to-end resistance, stated by the manufacturer, is used in calculating the maximum

Network cable length and minimum and maximum network voltages.

Ÿ The barrier shall be installed and wired in accordance with the manufacturers instructions.

Refer to Appendix B for hazardous area installation drawings.

4.3.8 Connection of Miscellaneous Hardware

Miscellaneous non-signaling hardware (e.g., recorders, current meters) may be connected to a Point-ToPoint Network in accordance with the following list.

IMPORTANT

No non-signaling hardware (meters or measuring devices) may be

connected to a Multi-Drop Network since the transmitters, in this mode, do not output an analog process variable.

Ÿ Miscellaneous hardware may be series or parallel connected to the Network according to its function.

Ÿ Miscellaneous hardware must be passive two-terminal devices.

Ÿ Miscellaneous hardware may not generate any type of noise or signals, other than noise that is

inherent in resistive components.

September 1995

UM344-2 INSTALLATION

4-13

Ÿ Individual miscellaneous hardware must meet the following requirements:

Ÿ Capacitance to Ground ................ 50 pF maximum

Ÿ Resistance to Ground ................. 1 MΩ minimum

Ÿ Impedance if Series Connected ................ Less than 10Ω

Ÿ Impedance if Parallel Connected .................. Greater than 50kΩ.

Ÿ The maximum number of miscellaneous devices per Network is 16. The combined electrical

characteristics may not exceed the following:

Ÿ Maximum capacitance to ground ................ 800 pF

Ÿ Minimum resistance to ground ................ 62.5kΩ

Ÿ Maximum series impedance ................ 160Ω

Ÿ Minimum parallel impedance ............... 3125Ω

4.3.9 Determine Sensor Cable Requirements

If the Transmitter is mounted remotely from the sensor, the wire characteristics of the extension cable between the sensor and Transmitter will be different for thermocouple inputs than for RTD, ohm, or millivolt type inputs.

A. Thermocouple Sensor -to-Transmitter Extension Cable:

1) Select extension grade or thermocouple grade wire of the same calibration as the thermocouple:

calibrations are T, J, E, K, R, S, N, B.

• THERMOCOUPLE GRADE: Wire is made from same materials as thermocouple and

subject to same limits of error as thermocouple.

• EXTENSION GRADE: Noble and refractory thermocouple extension grade wire is made

from inexpensive proprietary alloys that simulate the thermoelectric behavior of the actual thermocouple element over a limited range of temperatures.

Base metal (T, J, K, E) thermocouple extension grade wire is made from the same materials

as thermocouple wire; however, its use is restricted to a lower range of temperatures.

For extension grade wire, the ambient temperature at the thermocouple head connection point

may not exceed the temperature limits of the extension wire.

2) Cable Recommendation: FEP insulated and jacketed, twisted and shielded. Wire size

should be 16 to 20 AWG.

September 1995

INSTALLATION UM344-2

4-14

B. RTD/Ohm Sensor -to-Transmitter Extension Cable

The Transmitter will compensate for the effect of lead wire resistance for 3 and 4-wire RTD's and for

an Ohm (potentiometer) sensor when a 3-wire input connection is used. Input connections may be made with copper wire.

1) Cable Recommendation for RTD: Multi-conductor high temperature cable, overall braid shield

with three copper TFE insulated conductors and TFE wrapped jacket. Wire size should be 24 to 16 (AWG).

2) Cable Recommendation for Ohm: Multi-conductor standard temperature instrumentation grade

cable, overall braid shield, PVC insulated three copper conductors with PVC jacket. Wire size should be 24 to 16 (AWG).

C. Millivolt Sensor -to-Transmitter Extension Cable

Cable Recommendation: Multi-conductor standard temperature instrumentation grade cable, overall

braid shield, PVC insulated twisted pair copper conductors with PVC jacket. Wire size should be 24 to 16 (AWG).

4.3.10 2-Wire RTD Accuracy Limitation

The use of a 2-wire RTD requires a careful analysis of the effects of extension lead wire resistance that can cause an error in temperature measurement.

A 2-wire RTD may be used when the resistance of the run of lead wire may be considered as an additive "constant temperature error" and the changes in lead resistance due to ambient temperature changes may be ignored.

The RTD sensor element is approximately one inch in length. The platinum wire at each end of the RTD is terminated in insulated copper lead wire. The lead wire extends beyond the sensor probe's protective metal sheath to a distance specified by the user. The lead wires are terminated in the Transmitter's terminal compartment when the probe assembly is mounted to the Transmitter. On a remote mounted Transmitter, the lead wires are termin ated in the probe's connection head and extended by a second set of wires to the Transmitter.

The extension lead wire resistance is the sum of the resistances of both copper wires connecting the RTD element to the Transmitter.

Extension lead wire resistances will add to the resistance of the RTD causing a permanent somewhat higher temperature reading than actually exists at the RTD location. For example, if a 1 degree offset error is acceptable, then the maximum #24 AWG extension lead wire length permissible would be calculated for a 100 Ohm RTD (DIN Curve) as follows:

September 1995

UM344-2 INSTALLATION

4-15

resistance change of RTD per 1°C Total length (L) = resistivity of #24 AWG per foot

0.39 ohms

L = = 14.8 feet or 7.4 feet for each lead.

0.0262 ohms per foot

A 0.3° offset error is caused by an extension lead wire (#24) length of 2.23 feet.

As the calculations indicate, extension lead wire added to a 2-wire RTD can cause serious offset error. A 2-wire RTD should not be used without determining that the result s are acceptable.

The effects of lead wire resistance are compensated for by the Transmitter when 3 and 4-wire RTDs are used.

4.3.11 Shielding and Grounding

The preferred method of grounding the loop cable shield is illustrated in Figures 4-1, 4-2, and 4-3.

The following guidelines represent proven grounding practices that will reduce magnetically coupled interference:

Ÿ Ground the cable shield at ONE point, as shown.

Ÿ Preferably, ground the cable shield at the Network power supply.

Ÿ When the cable shield is grounded at the power supply:

a) The cable shield should remain open (not connected) at the Field Instrument (Transmitter).

b) The shields of both cables at a Network Junction should be spliced. Alternatively, connect both

to a terminal in the Box or Panel, provided that the terminal is isolated from ground.

Ÿ Point-To-Point Network

Other permissible single point grounding schemes are:

a) The cable shield may be grounded at the Ground Connection in the signal terminal compartment

of the transmitter's electronic housing. It is recommended that a separate ground wire be run from this Ground Connection to building ground to ensure a dependable ground.

The power supply (+) and (-) connections must be floated and the shields at Network Junctions

must be connected as discussed above.

September 1995

INSTALLATION UM344-2

4-16

b) The cable shield(s) may be grounded at a Network Junction Box or Wiring Panel provided that

the cable shields are connected to either a terminal or the Box or Panel frame, and the terminal or frame is gr ounded.

The power supply (+) and (-) connections must be floated and the cable shield at the transmitter

must not be connected.

Ÿ Multi -Drop Network

If the Primary Master's power supply output is isolated from ground, the Network may be floated.

The cable shield should be connected only to one point: the Primary Master's negative supply output.

Ÿ Sensor Cable

a) Shielded sensor cable should be used (remote mounted sensor) to minimize the effects of electric

noise. The sensor wires should be twiste d to minimize magnetic induced noise.

b) On a remote mounted thermocouple, if the thermocouple measuring junction is grounded to its

sheath (which is also grounded), connect the sensor cable shield to ground as close as practical to the measuring junction.

c) On a remote mounted thermocouple, if a thermocouple measuring junction is ungrounded, ground

the cable shield and the negative thermocouple wire to a common point as close as practical to the measuring junction.

d) Do not connect the cable shield to ground at the Transmitter's terminal compartment if the cable

shield is grounded at the sensor assembly.

4.4 MECHANICAL INSTALLATION

This section describes the mechanical installation of a Transmitter and the installation of electrical conduit for wiring. Transmitter dimensions are given in Figure 8-3.

Mount a Transmitter in any position (orientation).

Be sure to allow sufficient clearance for:

Ÿ Installation of wiring Ÿ Removal of the enclosure end caps Ÿ Viewing of the optional Digital Meter

4.4.1 Pipe Mounting

A Transmitter can be mounted to a vertical or horizontal 2-inch pipe using the supplied mounting bracket.

1. Transmitter to Bracket Mounting

September 1995

UM344-2 INSTALLATION

4-17

1) Refer to Figure 4-5 and align four mounting holes in the base of the enclosure with the four 0.281-

inch diameter holes in the Bracket. Note that the transmitter can be mounted to the Bracket in four possible positions (90° apart) to the Bracket.

2) Using supplied 1/4-20 x 1/2 bolts, mount the transmitter to the bracket.

September 1995

INSTALLATION UM344-2

4-18

5.90 (149.9)

2.81

(71.4)

0.72(18.3)

3.80(96.5)

4.04(102.6)

2.81

(71.4)

4.44 (112.8)

.034(8.6) Diameter

0.61(15.5) Dimensions in Inches(millimeters)

Mount Transmitter to

bracket with

1/4-20 bolts

and lockwashers,

quantity 4

X02821S1

FIGURE 4-5 Di mensions, Mounting Bracket for Model 344

September 1995

UM344-2 INSTALLATION

4-19

X02822S0

Pipe Mounting

Horizontal

4.82(122.4)

5.06(128.5)

Vertical

4.30

(109.2)

Wall Mounting

September 1995

INSTALLATION UM344-2

4-20

FIGURE 4-6 Model 344 Mounting Configurations with Supplied Bracket

September 1995

UM344-2 INSTALLATION

4-21

2. Bracket to Pipe Mounting

1) At the selected location on the pipe, place the pipe -groove side of the mounting bracket against the pipe. See Figure 4-6.

2) Slip the supplied U-bolt around the pipe and through one of the two pairs of mounting holes in the pipe-groove face plate of the bracket.

3) Place a supplied washer and hex nut on each end of the U-bolt and hand tighten the nuts. Rotate the bracket around the pipe to place the Transmitter in the desired position, then secure the bracket to the pipe.

3. Reposition the Transmitter's local display (if any) to provide the best possible view of the display.

Refer to Section 4.4.4.

4.4.2 Flat Surface Mounting

A Transmitter can be mounted to a flat surface using the supplied mounting bracket and user supplied 5/16-inch bolts.

Refer to Figures 4-5 and 4-6 and the following for mounting guidance:

1. Bracket To Flat Surface Mountin g

1) Refer to Figure 4-5 for the bracket mounting hole dimensions.

2) Layout the mounting hole pattern on the selected area of the surface. Drill 0.344-inch diameter mounting holes to accept 5/16-inch bolts.

The thickness of the mounting surface and bracket height above the surface are factors in

determining the required length of the mounting bolts.

3) Place the pipe -groove side of the bracket against the mounting surface site and align the bracket and surface mounting holes. Install the bracket with user supplied 5/16-inch bolts, washers, and hex nuts.

2. Transmitter To Bracket Mounting

1) Mount transmitter to bracket as described in Section 4.4.1, step 1.

2) Reposition the Transmitter's local display (if any) to provide the best possible view of the display. Refer to Section 4.4.4.

September 1995

INSTALLATION UM344-2

4-22

4.4.3 Direct Mounting to Process

The Transmitter can be mounted directly to the point of measurement and supported by the thermowell, extension fittings, and probe assembly.

IMPORTANT

It is recommended that high temperature anti-seize compound be applied

to the threads of thermowells, extension nipples, union connectors, and sensor assemblies.

Refer to Figures 4-7 and 4-8 and the following for mounting guidance:

1. Unscrew the thermowell from the Sensor Assembly. Refer to the thermowell manufacturer's

installation literature and install the thermowell at the measurement point.

2. Screw onto the thermowell the extension nipple and union (if any).

3. If required, install insulation around the surface area of the measurement point to limit the effects of

heat radiating from the chamber, vessel, or pipe containing the process material.

4. Insert the probe assembly through the extension nipple (if present) and seat into the thermowell.

Screw the probe nipple into the union (if present) or into the thermowell.

5. If it is desired to have terminal compartment access from the same direction as the Sensor Assembly,

then screw an elbow -plus close nipple -plus coupling onto the probe nipple. See Figure 4-7.

6. Select one of the two conduit inlets and route the sensor leads extending from the probe into the

terminal compartment of the transmitter. Do not connect the wires.

7. Screw the transmitter onto the threads of the probe's nipple or elbow fitting (if used).

8. Refer to Section 4.5 to connect the sensor wires to the appropriate terminals.

September 1995

UM344-2 INSTALLATION

4-23

WITH DRAIN SEAL

Wall of Pipe or Process Vessel

Thermowell Hex

Thermowell

Wall of Pipe or Process Vessel

Union

Extension Nipple

Insulation (If Required)

WITHOUT DRAIN SEAL

Thermowell Hex

Union

Sensor Hex

Coupling

Conduit for 2-Wire Loop Wiring

Model 344 Transmitter

X02818S0

Close Nipple

Elbow

September 1995

Thermowell

Extension

Nipple Insulation (If Required)

Conduit

Elbow

Terminal Compartment Side

FIGURE 4-7 Transmitter-To-Process Mounting

Model 344 Transmitter

Conduit for Wiring

Drain Seal

INSTALLATION UM344-2

4-24

2. An RTD probe is a closed end

tube only. RTD sensors are not grounded.

Thermowell

Sensor Probe

Sheath

1/2 NPT Nipple

(Screws into

Transmitter

Conduit Inlet)

Sensor Element

Extension Wires

Extension

Assembly

Sensor

Probe

Probe Hex

RTD or

Thermocouple

Sensor

Element

Thermowell

Hex

Extension

Nipple

1/2 NPT

Thread

Union

Probe

Junction

See Notes

Sheath:

Stainless Steel

or Inconel

X02828S0

Exposed Junction

Notes:

1. Three styles of thermocouple probe junctions are shown.

September 1995

Ungrounded Junction Grounded Junction

FIGURE 4-8 Sensor Assembly

UM344-2 INSTALLATION

4-25

4.4.4 Local Digital Meter Installation, Repositioning and Removal

Three procedures are provided in this section. Refer to Figures 4-9 and 4-10 as necessary.

IMPORTANT

Follow proper electronic circuit board handling procedures to avoid

damage to the semiconductors by electrostatic discharge.

• Two procedures describe repositioning of an installed meter: A is for rotating the meter 180°, and B is

for rotating the meter 90° clockwise or counterclockwise (actually ±78°).

• To remove a meter, perform procedure A, steps 1-5 and 9.

• To install a meter perform procedure C.

A. Rotate Meter 180°

1. Turn off power to transmitter and remove enclosure cap to access Digital Display.

2. Snap wrist strap on wrist and connect ground clip to an unpainted area on the Transmitter or mounting bracket.

3. Locate a short ribbon cable that connects the Electronics Module to the Digital Meter assembly, at connector J1 typically. Disconnect the connector at the Digital Meter assembly and the slide cable from cable slot.

4. Loosen (do not remove) upper right and lower left assembly retaining screws.

5. Gently rotate assembly counterclockwise to position upper right retaining screw in large hole in keyhole and carefully lift assembly clear of screw, then slide it clear of lower left retaining screw.

6. Rotate the assembly 180°, place under the retaining screws, rotate assembly clockwise, and tighten screws.

7. Position ribbon cable in closest cable slot and connect cable to connector J3.

8. Disconnect wrist strap's ground clip.

9. Replace enclosure cap and restore power to transmitter.

B. Rotate Meter 90° CW or CCW

1. Remove Digital Meter assembly as described in paragraph A, steps 1 to 5, above.

2. Remove the upper right 3.25-inch hex stand-off. Install the stand-off in the upper left mounting hole.

September 1995

INSTALLATION UM344-2

4-26

housing. P1 power connector on Module must engage connector on baseboard.

3. At the Electronics Module, remove the meter mounting bracket attached to the left corner of bottom circuit board . Install bracket in right front corner of that circuit board.

0 and 180 Digital Meter

Mounting Harware Locations

Meter Orientation

Note 3

o o

90 and 270 Digital Meter

Mounting Hardware Location

Electronics Module Securing Screw

Connector P2, for Ribbon Cable to Digital Meter

Notes:

1. Enclosure Cap and Digital Meter removed to show Meter mounting hardware.

2. Bracket screwed to the Electonics Module.

3. Meter orientations relative to Transmitter body are shown.

4. Jumper W1, Zero and Full Scale Pushbutton Enable/Disable: Enable - jumper pins 2 & 3 Disable - jumper pins 1 & 2.

Hex Stand-Off

and

Digital Meter Assembly

Mounting Screw

Guide Blocks

Electronics Module

Notes 1 and 5

W1, Note 4

Bracket and

Digital Meter Assembly

Mounting Screw

Note 2

X028AAS0

5. When installing an Electronics Module, guide blocks must engage guide posts in

FIGURE 4-9 Digital Meter Orientation and Mounting Hardware

4. Rotate the Digital Meter assembly either CW or CCW 90° (to the 90° or 270° position), slip the assembly under the retaining screws, and tighten both screws.

5. Position the cable in the cable slot and insert the cable connector into the closest connector (J2 or J4).

6. Replace the enclosure cap and restore power to transmitter.

September 1995

UM344-2 INSTALLATION

4-27

Factory Meter Orientation 0

Shown with Enclosure Cap Removed

Disconnect

Cable

Notes:

1. Meter can be rotated clockwise or counterclockwise either 90 (actually, 78 and 282 respectively) or 180 .

2. Remove Enclosure Cap for access to Meter.

3. Move Meter mounting screws when repositioning Meter 90 CW or CCW.

o o

Cable guide

slot (4 places)

Meter Mounting

Screw, qty. 2

Digital LCD Meter

Cable connectors

J1 to J4 wired

in parallel

Meter Repositioned 180

Meter Repositioned 90 CCW

X02870S1

Notes 1, 2 and 3

FIGURE 4-10 Digital Meter Repositioning and Removal

C. Installation

1. Turn off power to transmitter and remove the longer enclosure cap.

2. Snap wrist strap on wrist and connect ground clip to an unpainted area on the Transmitter or mounting bracket.

September 1995

INSTALLATION UM344-2

4-28

3. Determine desired meter orientation and perform either procedure A or B. Note the following when installing and positioning the short ribbon cable and when applying power to the transmitter.

NOTE

Pin 1 end of cable connector is identified by dark Red or Blue striped cable conductor. Pin 1 of Board “J” connector is identified by the “1” printed next to one corner of the connector.

At power-up, an automatic display test is performed which turns on all LCD segments for approximately 5 seconds. At the conclusion of the test, if the Transmitter is active, a numerical value will be displayed with an annunciator. If the Transmitter is configured as a Controller, additional annunciators may be displayed.

4.4.5 Electrical Conduit and Cable Installation

Electrical conduit and network, sensor, and power wire are supplied by the user. Access to electrical terminals is described in Section 4.4.5.3.

For conduit and cable routing, refer to the user's installation drawings. Installation of conduit and cabling should follow the guidelines given below.

4.4.5.1 Conduit

Ÿ Transmitter conduit inlets accept male conduit fittings. Refer to the Transmitter's nameplate and

Section 8.1 to determine whether conduit threads are ½-14 NPT or M20 x 1.5.

Seal ½ NPT fittings with TFE/PTFE tape; seal M20 fittings with a soft-setting sealing compound rated for

at least 105°C (221°F).

Ÿ When routing conduit, avoid areas that might subject the conduit to chemical or physical abuse or

areas with high EMI/RFI conditions.

Ÿ Long sensor cable runs should be installed in conduit between the transmitter and sensor.

Ÿ Install sensor cable in conduit in areas of high electrical interference.

Ÿ Install conduit for field wiring.

Ÿ If a high humidity environment can exist and the transmitter is located at a low point in the conduit run,

install drain seals at the transmitter's conduit inlets to prevent condensation from entering the Transmitter. See Figure 4-11.

Ÿ Remove all sharp edges or burrs from conduit that may damage wires.

September 1995

UM344-2 INSTALLATION

4-29

Explosion Proof Installation

Plug unused entrance

Conduit for field wiring (DC power)

Drain Seal

Conduit Drain Installation

For explosion proof installation use conduit seal, Crouse-Hinds type EYS or equivalent, on wiring outlet.

Plug unused Entrance

Conduit for field wiring (DC power)

X02824S1

FIGURE 4-11 Conduit Drain and Explosion Proof Installations

September 1995

INSTALLATION UM344-2

4-30

Ÿ Thermocouple wire must be handled with great care when being installed in conduit. Decalibration of the wire can result by cold -working the metal conductor, an effect that can occur when the wire is drawn through a conduit or damaged by rough handling or vibration.

4.4.5.2 Cables

Ÿ Mark or tag each signal cable conductor as either SIGNAL (+) or SIGNAL (-) to ensure correct

connection at the Transmitter.

Ÿ Mark or tag each sensor wire to be connected to a remote mounted transmitter to indicate its specific

transmitter terminal number (1, 2, 3) connection

EXAMPLE: 3-wire RTD tag descriptors: RTD (+) #1, RTDI #2, RTD (-) #3 Thermocouple tag descriptor: TC (+) #1, TC (-) #3

Ÿ Use pulling grips and cable lubricants for easier cable pulling. Pull cable through conduit into

Transmitter terminal compartment.

Ÿ Do not exceed the maximum permitted pulling tension on the cables. Ma ximum tension is normally

specified as 40% of the cable's breaking strength.

Ÿ Do not exceed the maximum conduit fill specified by the National Electric Code.

4.4.5.3 Access to Transmitter Terminal Compartment

Two terminal strips for signal (loop), MXC, test (milliammeter), and sensor connections are located inside the shorter enclosure cap; see Figure 1-1. To access the terminal strips, simply unscrew the enclosure cap protecting the terminal compartment.

This completes the mechanical installation.

September 1995

UM344-2 INSTALLATION

4-31

4.5 ELECTRICAL INSTALLATION

This section describes loop wiring for Point-To-Point and Multi-Drop Networks. Refer also to Section 4.6 for installations in hazardous locations. Figure 4-12 shows signal and sensor termination terminal strips in the Transmitter’s enclosure.

The following should already have been completed:

Ÿ Selection of either analog or digital operating mode and corresponding Point-To-Point or Multi-Drop

Network; Section 4.3.3.

Ÿ Selection of a power supply; Section 4.3.4.

Ÿ Mechanical installation of Transmitter(s) installed; Section 4.4.

Ÿ Pulling of loop and sensor cables through conduit and into terminal compartment; Section 4.4.5.

Connect the transmitter to the loop as follows.

1. Access transmitter signal terminals by unscrewing the short enclosure cap.

2. As shown in Figure 4-12, there are two terminal strips:

Upper Terminal Strip

• SIGNAL (+) and SIGNAL (-): Transmitter Network Connections

• TEST (+) and TEST (-): Analog test (milliammeter) connections

Lower Terminal Strip

• #1: RTD (+) or OHM (+); TC (+) or mV (+) sensor connections

• #2: RTDI sensor connection

• #3: RTD (-) or OHM (-); TC (-) or mV (-) sensor connections

3. Determine method of connection to transmitter signal (loop) terminals.

Strip loop cable and conductors. Install ring tongue or spring spade terminals for #6 screws and the

cable conductor gauge. If terminals will not be used, tin conductor ends and form a loop.

September 1995

INSTALLATION UM344-2

4-32

X02869S1

MXC

Connections

Signal (+)

Terminal

Signal (-)

Terminal

Test (+)

Terminal

TESTSIGNAL

+ -

Test (-)

Terminal

Ground

Screw

Notes:

1. Viewed with enclosure cap removed.

2. MXC = Moore XTC Communicator.

Sensor Terminals for

Thermocouple, RTD,

Ohms,or mV Input

FIGURE 4-12 Signal (Loop) , Sensor, MXC and Test Terminals

4. Connect the loop cable to the SIGNAL (+) and (-) terminals inside the Transmitter's enclosure. Refer

to Figure 4-1, 4-2 or 4-3 for the needed connections for the type of Network. Terminals will accommodate wire sizes up to 16 AWG. Attached to both signal terminals are lugs that facilitate the connection of the MXC Communicator. DO NOT connect signal wires to the lugs.

IMPORTANT

The cable shield must be insulated from all terminals and the transmitter

enclosure. Refer to Section 4.3.11 for additiona l shielding and grounding information.

5. Connect Sensor Wires

Hook each stripped solid wire end or insert each crimp-on terminal under the appropriate terminal

screw and tighten the screw for a reliable electrical connection. Refer to figures showing the needed connections as listed below in paragraphs 1) to 4).

1) RTD Sensor - Connect the tagged RTD leads as shown in Figure 4-13 detail A, B, or C, depending upon type of RTD used.

2) Thermocouple Sensor - Connect the tagged thermocouple extension leads as shown in Figure 4-13 detail D. The positive and negative thermocouple leads are usually color coded.

September 1995

UM344-2 INSTALLATION

4-33

Ground shields only at the power source

Signal

Cable

Note 1

RTD+ RTD-

Note 2

No connection

RTD-RTD+

A. 2-Wire RTD

Signal

cable

Note 2

RTDI

RTD+

Signal

Cable

RTD-

Note 2

No connection

RTD-RTD+

B. 3-Wire RTD

Signal

cable

Note 2

RTDI

RTD+

C. 4-Wire RTD

RTDI

Signal

Cable

Note 2

RTD-

Note 2

No connection

RTD-RTD+

No connection

Signal

cable

Note 2

TC+ TC-

Note 2

No connection

TC+

TC-

D. Thermocouple

Notes:

1. Install jumper wire between terminals 1 and 2.

2. Connect the sensor and signal cable shields and insulate from ground.

September 1995

OHM+

OHM-

mV+ mV-

Note 2

No connection

OHMI

OHM+ OHM-

Jumper

OHMI

mV+ mV-

E. OHMS Input

FIGURE 4-13 Model 344 Sensor Wiring

+ -

F. mV Input

Note 2

No connection

X02825S1

INSTALLATION UM344-2

4-34

Standard ANSI color coding is used on insulated thermocouple or extension grade wire when the

insulation permits. Some insulations will use a colored tracer to indicate the lead polarity. Refer to Table 4.2 for color code information and bare wire characteristics for identifying non-color coded wires.

When connecting solid thermocouple extension wire, wire insulation should butt against the head

of the screw. The conductor should not be visible.

TABLE 4.2 Thermocouple And Extension Grade Wire Characteristics

ANSI TYPE POSITIVE LEAD NEGATIVE LEAD BARE WIRE

T/C METAL COLOR METAL COLOR CHARACTERISTICS

T Copper Blue Constantan Red Copper - yellow

Constantan - silver

J Iron White Constantan Red Iron - magnetic

Constantan - nonmagnetic

E Chromel Purple Constantan Red Chromel - shiny metal

Constantan - dull metal

K Chromel Yellow Alumel Red Chromel - non-magnetic

Alumel - magnetic

S Platinum & 10%

Rhodium

R Platinum & 13%

Rhodium

B Platinum & 30%

Rhodium

Black Pure Platinum Red ---

Gray Platinum with 0.6%

Rhodium

Red ---

3) Ohms-to-Milliampere Conversion - connect the OHM (+), OHM (-), and OHM I leads as shown in Figure 4-13 detail E, Ohms Input.

4) Millivolt-to-Milliampere Conversion - Connect the mV (+) and mV (-) leads as shown in Figure 413 detail F, mV Input.

Inspect each connection for strands of wire that could short to an adjacent terminal, for connection to

correct terminal, and for tightness of terminal screw.

Be certain that the shield braid is insulated from all terminals and the metal terminal enclosure.

6. Reinstall enclosure cap. Tighten cap to compress the internal O-ring.

IMPORTANT

Be certain that enclosure threads are coated with an anti-seize compound and

that the cap seal (O-ring) is in place before installing a cap. A typical compound is Never-Seez by Emhart Bostik.

September 1995

UM344-2 INSTALLATION

4-35

7. If one of the two electrical conduit entrances in the housing is not used, it should be plugged. Refer to

the Transmitter's nameplate and Section 8.1 to determine whether entrance holes accept ½-14 NPT or M20 x 1.5 fittings.

Seal ½ NPT fittings with TFE/PTFE tape; seal M20 fittings with a soft setting sealing compound rated for

at least 105°C (221°F).

4.6 HAZARDOUS AREA INSTALLATION

Drawings showing Transmitter installation data for hazardous areas are located in Appendix B. Entity parameters, barrier selection, and important wiring information are specified on these drawings. The Appendix also contains a list of tested barriers.

Before installing a transmitter in a hazardous area, check the nameplate and Sections 8.1 and 8.3 of this Manual for required approvals or certifications.

NOTE

The MXC is approved for use in non-hazardous areas only.

EXPLOSION-PROOF INSTALLATION

If the installation is required to be explosion-proof per the National Electrical Code, refer to a current copy of the Code and the follow ing:

Ÿ User supplied explosion-proof conduit seals (glands) are required on transmitter housing conduit outlets

and any installed junction boxes. See Figure 4-11.

Ÿ Explosion-proof glands must provide a good seal. Apply a sealing compound around the sealing

surface if necessary.

Ÿ Sensor and power wiring conduit entries at the Transmitter must have a minimum of five threads fully

engaged.

Ÿ The enclosure cap must be installed and have a minimum of eight threads fully engaged with no

damaged threads pe rmitted.

Ÿ Go to Section 4.5 for wiring connections to the transmitter's terminals. Refer to Appendix B for

hazardous area installation information.

This completes the physical installation.

•

September 1995

INSTALLATION UM344-2

4-36

September 1995

UM344-2 ON-LINE AND OFF-LINE OPERATION

5-1

5.0 ON-LINE AND OFF-LINE OPERATION

On-line operation is any configuration or monitoring activity which involves direct communication with a transmitter. When the controller function block is disabled, the local pushbuttons may be used to configure range and damping. When the controller is enabled, the local pushbuttons may be used to display PROCESS VARIABLE (PV), SETPOINT (SP) and VALVE (V); transfer control mode from AUTO (A) to MANUAL (M); and change or store SET POINT and VALVE settings.

The configuration may be edited remotely using an MXC, a personal computer (PC) running XTC Configuration Software, or another HART Primary or Secondary Master. The MXC can also be used to monitor a transmitter’s variables and to look at a transmitter’s status.

Off-line operation is any configuration activity that occurs without direct communication with a transmitter. This includes using the MXC to create or edit a configuration and then to store that configuration in an MXC archive. It also includes using a personal computer and XTC Configuration Software to create or edit, and then store, a configuration.

5.1 ON-LINE OPERATION

The first part of this section contains the steps to configure and monitor a Model 344 from an MXC. The latter part of this section describes configuring the transmitter using the local pushbuttons.

5.1.1 Using the MXC for Configuration

Each transmitter is shipped with default data stored in its memory. Some of this data controls communication and transmitter operation and cannot be altered by the user. Other data determines how the transmitter responds to changes in temperature with a change in current or digital output and is alterable by the user. Using the MXC in the on-line mode, configurations can be uploaded from the transmitter, edited, and saved to archive memory or downloaded to the Model 344. The following sections describe configuration in more detail.

The following sections are in a two column format. Step-by-step procedures are in the right column. The left column contains relevant MXC screens.

September 1995

ON-LINE AND OFF-LINE OPERATION UM344-2

5-2

OVRD

Dev ID: 210300003C Tag: TTC-101 ADD: 00

LOOP CAL/ CON -

TEST FIG

END

CONFIGURATION MODE

EDIT EDIT ARCH CONF END

TEMP XMTR MODEL 344

TYPE 03

QUIT CONT

WRITE PROTECT STATUS DISABLE LAST NEXT SEL/ SEL/ OPTN OPTN END CONT

CONFIGURATION COMPLETE RE- DOWN QUIT SAVE VIEW LOAD

SELECT BLOCK TO EDIT

- SENSOR INPUT SELPREV NEXT END ECT

1. Establish communication with a transmitter; see Section 3.2. The On-Line Menu shown adjacent should be displayed.

2. Press CONFIG (F3) at the On-Line Menu screen to enter the configuration mode and display the Configuration Mode screen (adjacent). This screen is used to select editing a configuration stored in either the selected transmitter or archived in the MXC.

3. Press EDIT CONF (F2) to continue with configuration and display the transmitter type. See adjacent screen.

NOTE

The EDIT ARCH (F1) key is pressed to edit an

archived configuration and will be discussed later.

4. Press CONT (F4) to show the Status screen. Select the state of the Write Protect mode (enable /disable) by toggling the LAST OPTN (F1) or NEXT OPTN ( F2) key.

NOTE

Write Protect prevents changes to transmitter

parameters and the transmitter will not accept a downloaded configuration.

5. Press SEL/CONT to continue. The MXC screen will display the Function Block menu.

Press SEL/END (F3) to end this session. The MXC screen

will display the Configuration Complete menu with options to quit configuration mode, save the configuration, review the configuration, or download the configuration

. NOTE Most configuration screens show the option of

ending configuration and going to this screen. These choices are discussed in Section 5.1.1.9.

6. Choose the function block to be configured. Press either PREV (F1) or NEXT (F2) to scroll through the function blocks.

September 1995

UM344-2 ON-LINE AND OFF-LINE OPERATION

5-3

NOTE

Function blocks are in an easy to use format with

configuration parameters grouped by like function. Those supported are Sensor Input, Operator Display, Transmitter ID, Output Block, Alarm Block, SP Track & Hold, A/M Transfer and Controller Block. Each is shown in Appendix A.

7. Press SELECT (F4) to view or edit a function block’s parameters. Pressing END (F3) will end configuration (see step 4 above).

Go to the section for the selected function block (Sections 5.1.1.1

- 5.1.1.8).

5.1.1.1 Sensor Input Block

The following parameters can be changed: INPUT TYPE, MEASURED VARIABLE (MV) UNITS, RANGE, DAMPING, and BURNOUT DIRECTION.

INPUT TYPE: T/C J THERMOCOUPLE

LAST NEXT

OPTN OPTN CONTEND

SEL/

MEASURED VARIBLE UNITS: deg F

LAST

OPTN OPTN CONTEND

SEL/

1. Press SEL (F4) at the Sensor Input Block to display the Input Type.

2. Press LAST OPTN (F1) or NEXT OPTN (F2) to scroll through the Input Options: T/C, OHM, mV, RTD.

3. Press SEL/CONT (F4) to select the current parameter, and continue to the next Input Type configuration parameter.

4. Press LAST OPTN (F1) or NEXT OPTN (F2) to scroll

RANGE LO: 0.0000 deg F HI: 100.00

SNSR

SEL/

CONTENDEDIT INPUT

through the Input Options.

5. Press SEL/CONT (F4) to select the current parameter, and continue to the MEASURED VARIABLE UNITS Screen.

6. Press LAST OPTN (F1) or NEXT OPTN (F2) to scroll through the units selections. These units are listed in Appendix C under the Sensor Input Block description.

7. Press SEL/CONT (F4) to select the current parameter, display the Range screen, and continue to the next configuration parameter (go to step 8).

Pressing SEL/END (F3) will select the current parameter, end configuration, and return to the On-Line Menu.

August 1995

ON-LINE AND OFF-LINE OPERATION UM344-2

5-4

8. The Range screen shows the unit of measurement and the lower and upper range values (LRV and URV) currently configured. Set the transmitter's temperature range corresponding to 4 and 20 mA. (See Section 8 for transmitter input ranges.)

These values can be changed using either of two methods:

"Tell" or "Show."

Values for URV and LRV entered in the following

procedures are stored in the MXC. Complete config uration and perform the download steps in Section 5.1.2 to send the configuration to a transmitter.

METHOD 1 - The "Tell"

MV LO : 0.0000 ENTER MV LO: EN < QUIT TER

Method

MV HI : 100.00 ENTER MV HI: EN < QUIT TER

1) Press EDIT (F1) to display the screen for entering the

Lower Range Value (LRV).

2) Type the desired value at the blinking cursor.

3) Press either ENTER (F4) to select the value or QUIT

(F3) to exit this selection without saving.

4) The next screen displays the transmitter's Upper Range

Value (URV) which is set as described above.

METHOD 2 - The "Show" Method

In this method, the transmitter is ranged by applyin g actual URV

mV: 79.120 deg F

-0.0000 TO 100.00 SET

SET

QUIT ENTER

and LRV sensor inputs.

1) Press SNSR INPT (F2) in the Range screen.

The screen displays the On-Line value for the actual

temperature or MV units that the transmitter is reading.

2) Apply the LRV sensor input to the transmitter.

3) Press SET LO (F1) to set the LRV for the transmitter's range.

4) Apply the URV sensor input to the transmitter

5) Press SET HI (F2) to set the URV for the transmitter's range. The screen shows new LRV and URV values.

September 1995

UM344-2 ON-LINE AND OFF-LINE OPERATION

5-5

DAMPING : 1.0000 SEC

SEL/ SEL/ EDIT END CONT

DAMPING : SEC ENTER DAMPING VALUE EN < QUIT TER

BURNOUT DIRECTION: UPSCALE

LAST

OPTN

SEL/

END

SEL/ CONT

5.1.1.2 Operator Display Block

SELECT BLOCK TO EDIT

- OPERATOR DISPLAY SELPREV NEXT END ECT

PROCESS VARIABLE UNITS:

EGF

SEL/

END

SEL/ CONT< >

RANGE LO: 0.0000 HI: 100.00

EDIT

SEL/

END

SEL/ CONT

Press ENTER to store the new value in the on-line alterable memory and return to the Range screen. Pressing QUIT displays the Range screen without saving a new value.

NOTE

To conserve battery power, the MXC should not be left in the Sensor Input mode.

9. At the Range screen, press SEL/CONT to display the Damping screen and current damping value.

Press EDIT (F1) to enter a new damping value.

Type a new damping value and press either ENTER to save

and exit or QUIT to exit without saving.

10. At the Burnout Direction screen press either LAST OPTN or NEXT OPTN to choose UPSCALE or DOWNSCALE.

When the desired function is chosen, press SEL/END to

return to the Function Block Menu.

Go to the next section or the next desired function block.

The Operator Display block has the following parameters: PROCESS VARIABLE UNITS, RANGE, AUTO RERANGE, and LOCAL DISPLAY CODE.

1. Press SELECT to edit process variable units.

2. Type the process variable's units. It can be a combination of up to four alphanumeric characters. To edit, use the < or > keys to move to the character to be changed.

Press SEL/CONT to continue. Press SEL/END to end

configuration of this block and return to the Function Block Menu.

3. To set the range in the Operator Display Block, use the "tell" method described in Section 5.1.1.1 Sensor Input Block. Edit PV LO and HI in their respective screens by typing the upper and lower range values desired.

Press SEL/CONT to continue. Pressing SEL/END will end configuration and return to the Function Block Menu.

August 1995

ON-LINE AND OFF-LINE OPERATION UM344-2

5-6

< > END CONT

AUTO RERANGE: DISABLE LAST NEXT SEL/ SEL/ OPTN OPTN END CONT

LOCAL DISPLAY CODE: PROCESS VARIABLE

LAST NEXT SEL/ SEL/ OPTN OPTN END CONT

5.1.1.3 Transmitter ID Block

SELECT BLOCK TO EDIT

- TRANSMITTER ID SELPREV NEXT END ECT

TAG: TC-101

SEL/ SEL/

DATE (DD/MM/YY): 28/02/95

SEL/ SEL/ < > END CONT

DEVICE SERIAL NUMBER 12345678 SEL/ SEL/ < > END CONT

4. Set Auto Rerange to enable or disable using the LAST OPTN and NEXT OPTN keys.

Press SEL/CONT to continue. Pressing SEL/END will end

configuration of this block.

5. Scroll through the Local Display Code using the LAST OPTN and NEXT OPTN keys to view the following three choices: MEASURED VARIABLE, PERCENT, or PROCESS VARIABLE. Display the desired selection.

Press either SEL/END or SEL/CONT to enter the selection

and return to the Function Block Menu.

Go to the next section or the desired function block.

1. Press the NEXT key to display the Transmitter ID Block and then press SELECT to display the Tag screen.

2. If desired, enter or edit the transmitter tagname by typing an alphanumeric sequence. The blinking cursor shows where a character will be placed. Use the arrow keys < and > to move the cursor to any position in the tagname.

Press SEL/CONT to continue. Pressing SEL/END will end

configuration of the transmitter ID Block.

3. As described in steps 1 and 2, enter or edit the DESCRIPTOR and the MESSAGE, respectively.

4. At the Date screen, enter or edit the date using the < and > keys to move the cursor to any position in the date field.

NOTE

The format shown on the screen, DD/MM/YY,

must be followed or the MXC will not download the selection.

Press SEL/CONT to display the Device Serial Number

screen. Pressing SEL/END will end configuration of the transmitter ID Block.

5. Enter or edit the device serial number on the nameplate using the < and > keys to place the cursor to any position within the serial number field.

September 1995

UM344-2 ON-LINE AND OFF-LINE OPERATION

5-7

EDIT END CONT

SHORT ADDRESS 00

SEL/ SEL/

SHORT ADDRESS 00 ENTER ADDRESS EN < QUIT TER

5.1.1.4 Output Block

FAILSAFE LEVEL : LOW LAST NEXT SEL/ SEL/ OPTN OPTN END CONT

5.1.1.5 Alarm Block

ALARM1 : ENABLE

LAST NEXT

OPTN OPTN

SEL/

END

SEL/

CONT

ALARM1 SETPOINT:

25.000 DEG F SEL/

EDIT

SEL/

CONTEND

NOTE

Only numbers may be used in the serial number

field.

Press SEL/CONT to display the Short Address screen.

Pressing SEL/END will end configuration of the transmitter ID Block.

6. Enter or edit the transmitter short address using the EDIT, QUIT, and ENTER keys as described below.

EDIT - display the Short Address edit screen. Use the < key

to edit by erasing one character in the address at a time, starting with the last character. Type the new short address on the keypad.

QUIT - return to the previous screen without saving the

address.

ENTER - store the new short address in the current MXC

On-Line Memory. The MXC will now show the Function Block Menu.

1. At the Function Block Menu, press NEXT to configure the Output block and display the Failsafe Level screen.

2. Edit or change this value by scrolling through the selections using the LAST OPTN and NEXT OPTN keys.

3. Press either SEL/END or SEL/CONT to return to the Function Block Menu.

There are two absolute alarms which may be configured as HI or LO. The setpoint for the alarms is in the same units selected in the operator display block.

1. Press SEL (F4) at the Alarm Block to display the Alarm 1 screen.

2. Press NEXT OPTN (F2) to enable or disable Alarm 1.

3. Press SEL/CONT (F4) to continue to the setpoint screen.

August 1995

ON-LINE AND OFF-LINE OPERATION UM344-2

5-8

4. Press EDIT (F1) to edit the setpoint value. Press ENTER (F4) to change the setpoint value. Press QUIT (F3) to exit without changing the setpoint.

September 1995

UM344-2 ON-LINE AND OFF-LINE OPERATION

5-9

SELF CLEARING NAKS: ON

LAST

OPTN OPTN CONTEND

SEL/

ALARMS OUT OF SERVICE: OFF

LAST

OPTN

SEL/

END

SEL/ CONT

5.1.1.6 Setpoint Track and Hold

Block

TRACKING SETPOINT: NO

LAST

OPTN

SEL/

END

SEL/ CONT

PUSP: 55.000 DEG F

0.0000 TO 100.00 SEL/

CONT

EDIT

SEL/

END

5.1.1.7 A/M Transfer Block

POWER-UP MODE: AUTOMATIC

LAST

OPTN

NEXT OPTN

SEL/

END

SEL/ CONT

AUTOMATIC MODE ONLY: NO

LAST

OPTN

NEXT OPTN

SEL/

END

SEL/ CONT

5. Press SEL/CONT (F4) to configure the alarm type.

6. Press NEXT OPTN (F2) to choose either HIGH or LOW.

7. Press SEL/CONT (F4) to configure Alarm 2 or SEL/END (F3) to return to the Function Block Menu.

8. At the SELF CLEARING NAKS screen press NEXT OPTN (F2) to choose ON or OFF.

9. At the ALARMS OUT OF SERVICE screen press NEXT OPTN (F2) to choose OFF or ON and SEL/CONT (F4) to return to the Function Block Menu.

This function block can be configured as tracking or nontracking. When configured as tracking, the SP will track the PV when the controller is in manual. If it is configured as nontracking the SP will remain at its hold value. On power -up, the operating value in the function block is initialized to the Power-Up (PUSP) value.

1. At the SP TRACK & HOLD menu press SELECT (F4) to configure the TRACKING SETPOINT block. Press NEXT OPTN (F2) to choose either YES or NO. Press SEL/CONT (F4) to continue to the PUSP screen.

2. At the PUSP screen Press EDIT (F1) to edit the setpoint. Press ENTER (F4) to change the setpoint or QUIT (F3) to exit without changing the setpoint. Press SEL/CONT (F4) to return to the Function Block Menu.

The A/M Transfer may be configured to power-up in Automatic or Manual. From the A/M Transfer Menu choose SELECT (F4) for the POWER-UP MODE screen.

1. Press NEXT OPTN (F2) to choose between AUTOMATIC AND MANUAL. Press SEL/CONT (F4) for the AUTOMATIC MODE ONLY screen.

2. Press NEXT OPTN (F2) to choose YES or NO. When YES is selected the function block will always remain in the AUTO position. Press SEL/CONT (F4) for the POWERUP VALVE screen.

August 1995

ON-LINE AND OFF-LINE OPERATION UM344-2

5-10

POWER-UP VALVE:

0.000% SEL/

CONT

EDIT

SEL/

END

5.1.1.8 Controller Block

CONTROLLER: ON

LAST

OPTN

SEL/

END

SEL/ CONT

CONTROLLER TYPE: PID

LAST

OPTN

ACTION: REVERSE

LAST

OPTN

PROPORTIONAL GAIN:

1.0000

EDIT

MANUAL RESET TRACK: NO

LAST

OPTN

NEXT OPTN

SEL/

END

SEL/

END

SEL/

END

SEL/

END

SEL/ CONT

5.1.1.9 End or Review Configuration

3. Press EDIT (F1) to edit the Power-Up Valve setting. Press ENTER (F4) to change the setting, press QUIT (F3) to exit without changing the setting. Press SEL/CONT (F4) to return to the Function Block menu.

The controller function block provides an extensive range of Proportional-Integral-Derivative functions including PID, PD and ID. For more detailed descriptions of these controller functions refer to the appendix.

1. At the CONTROLLER BLOCK Screen press SELECT (F4) .

2. Press NEXT OPTN (F2) to turn the controller function ON or OFF.

3. Press SEL/CONT (F4) to configure the Controller Parameters or SEL/END (F3) to return to the Function Block menu.

4. At the CONTROLLER TYPE screen use LAST OPTN (F1) and NEXT OPTN (F2) to scroll through the PID, PD, ID options. Press SEL/CONT (F4) for the controller ACTION screen.

5. Press NEXT OPTN (F2) to select either a DIRECT or REVERSE acting controller. Press SEL/CONT (F4) to continue to the Proportional Gain, Time -Integral, Time Derivative, Derivative Gain, and Manual Reset blocks.

6. Press EDIT (F1) to edit a parameter. Press ENTER (F4) to change a parameter or QUIT (F3) to exit without changing the parameter.

7. Press SEL/CONT (F4) for the MANUAL RESET TRACK screen. Press NEXT OPTN (F2) to select YES or NO.

8. Press SEL/CONT (F4) to return to the Function Block Menu. This completes configuration.

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As described in the previous sections, there is a Function Block Menu in configuration mode from which basic function blocks can be accessed. Also in the previous sections, it was explained how to get back to this screen when making changes to a function block.

SELECT BLOCK TO EDIT

- SENSOR INPUT SELPREV NEXT END ECT

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OVRD

1. Choose END at the Function Block Menu in configuration

CONFIGURATION COMPLETE RE- DOWN QUIT SAVE VIEW LOAD

Dev ID: 210300003C Tag: TTC-101 ADD: 00

LOOP CAL/ CON -

TEST FIG

END

mode to display the Configuration Complete Menu. It shows these selections: QUIT, SAVE, REVIEW, or DOWNLOAD. Choose one after all configuration changes are entered.

QUIT - return to the MXC's On-Line Menu (adjacent) that

appeared after initial communication had been established.

SAVE - go to the Save To Archive screen to save the

transmitter configuration in an archive. The MXC will show the tagname, the archive location last used in the MXC, and

SAVE TO ARCHIVE 92 TTC-101

NEW YES ARCH END

three selections: YES, NEW ARCH, and END.

YES - save the configuration in the archive location

shown on the screen. If the archive shown contains a

CAUTION - PRESSING ENTER WILL REPLACE ARCH 00 A- ENPTC - 101 BORT TER

NEW ARCH - save the configuration to a new archive

END - return to the previous screen without saving.

configuration (other than a default configuration), a Caution screen will be displayed. Press Enter to overwrite the stored configuration.

location.

REVIEW - return to the Function Block Menu. The

configuration can be reentered and edited from this Menu by pressing CONT.

TEMP XMTR MODEL 344

TYPE 03

DOWNLOAD - downloads the configuration to the

transmitter. Go to the next section.

QUIT CONT

5.1.2 Downloading A Configuration

After all configuration information has been edited at the MXC, download the configuration to the transmitter. A download can be performed in configuration mode at any time by pressing a series of END and SEL/END keys until a DOWNLOAD key is

NO CONFIGURATION CHANGES MADE. DOWNLOAD ABORTED. CONT

visible on the screen.

1. Press DOWNLOAD to send the configuration to the transmitter.

WARNING! DOWNLOADING WILL CHANGE XMTR CONFIG- A- DOWN URATION BORT LOAD

Ÿ If no changes have been made to a configuration and

DOWNLOAD is pressed, the MXC will display the adjacent screen and will not perform a download to prevent unnecessary communication.

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Ÿ If the configuration has been

edited, the MXC will display the adjacent warning that the transmitter's configuration will be changed.

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DOWNLOADING CONFIGURATION

- PLEASE WAIT -

DOWNLOAD COMPLETE

5.1.3 Local Transmitter Operation

2. From the above Warning screen, press one of the following two keys:

DOWNLOAD - start a download. The MXC will show the

Download Wait screen and then the Download Complete screen. The new configuration is now stored in the transmitter.

ABORT - return to the pr evious screen.

The Model 344 has two local pushbuttons labeled FS (Fullscale) and Z (Zero) located on the housing. These are used to set range and damping when the controller block is configured “OFF”. This is detailed in the following sections.

When the controller block is configured “ON” the ranging/ damping capabilities are not available. In this mode the pushbuttons may be used to transfer between AUTO and MANUAL control, change VALVE output, and change the SETPOINT. This is detailed in the following sections.

Local Pushbutton Operation:

The “Pushbutton Mode” must be activated as described below to use the Zero and Full Scale pushbuttons.

• The Pushbutton Mode is activated whenever either pushbutton is pressed and held for a minimum of 5 seconds and then released. The “PB” annunciator on the Digital Meter will be lit while the Pushbutton Mode is active.

• The Pushbutton mode will automatically time -out after 1 minute.

• Failure to hold a pushbutton ON for a minimum of 5 seconds will prevent entry into the Pushbutton mode.

• The pushbuttons are disabled when the transmitter is placed in “CONFIGURATION HOLD,” as when downloading a configuration.

Pushbuttons are enabled or disabled by jumper W1 on the Electronics Module and are enabled by the factory. Jumpering pins 2 and 3 equals ENABLE. When the jumper is in the DISABLE position, the pushbuttons perform no function.

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Status

Variable

5.1.3.1 Display Functions The numerals displayed on the Digital Meter represent the value

of the PROCESS VARIABLE (PV) when the “PV” annunciator is lit; see Figure 5-1. The units associated with PV are chosen during transmitter configuration of the OPERATOR DISPLAY BLOCK. Refer to section 5.1.1.2. There are three OUTPUT DISPLAY CODE choices listed in Table 5.1 that describe what information is displayed and how it will be annunciated.

The VALVE (V) is always displayed as a percentage of controller output and the “V” and “%” annunciators will be lit. The SETPOINT (SP) is displayed in the same units as the PROCESS VARIABLE (PV). When the controller is ON depressing the FULL SCALE pushbutton will toggle the display between “PV” and “V”. The ZERO pushbutton will toggle the display between “PV” and “SP”.

Status

Alarm

Status

Display

Code

Displayed

Variable

Indicator

A M

Auto/Manual

PB AL % ENG

Displayed

FIGURE 5-1 Model 344 Digital Meter

TABLE 5.1 Output Display Code Choices

OUTPUT DISPLAY

LIT ANNUN. PV UNITS

CODE

0 (Percent) % Percent of full span (0 to 100) 1 (Process Variable) ENG Engineering Units (e.g., CEL, FAHR) 2 (Measured Variable) None CEL, OHMS, MV, KELV, RANK, FAHR

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5.1.3.2 Local Pushbutton Input Ranging (Controller OFF)

The low and high process temperatures selected as the 0% and 100% span points may be applied to the transmitter and stored in the EEPROM using the ZERO/FULLSCALE pushbuttons. This procedure assumes the transmitter is field mounted to an operating process. If the transmitter does not contain an optional Digital Meter to report the process variable, other instrumentation on the Network must be available to provide this in formation.

1. Open the sliding cover on top of the Transmitter's

housing to access the ZERO/FS pushbuttons. See Figure 1-1.

2. Change ZERO range value:

1) Supply new ZERO value.

If the process variable currently being reported by

the Transmitter is not the desired ZERO value, then the process must be manipulated by an operator to arrive at the desired value.

2) Activate the Pushbutton Mode

Press and hold for 5 seconds or more the ZERO

pushbutton, then release the pushbutton

3) Enter ZERO Valu e

Press and release the Zero pushbutton. The new

0% range value is stored in memory. If an optional Digital Meter is installed, observe that the "PB" annunciator in the display extinguishes (Normal Mode).

When a new 0% value is set, the Transmitters 100% value is automatically shifted to maintain the original span except as follows:

• If the process is out of range, no new ZERO

value is stored.

• If the new ZERO value would shift the

FULLSCALE value past the sensor limit, the new FULLSCALE value is automatically set to the appropriate sensor limit (except in the case where this would produce a span that is

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too small, in which case no new ZERO or FULLSCALE value is stored).

3. Change FULLSCALE range value:

1) Supply FULLSCALE value.

If the process variable currently being reported by

the Transmitter is not the desired FULLSCALE value, then the process must be manipulated by an operator to arrive at the desired value.

2) Activate the Pushbutton Mode

Press and hold for 5 seconds or more the

FULLSCALE pushbutton, then release the pushbutton.

3) Enter FULLSCALE value

Press and release the FULLSCALE pushbutton. The new 100% range value is stored in memory. If an optional Digital Meter is installed, observe that the "PB" annunciator in the display extinguishes (Normal Mode).

NOTE

Changing the FULLSCALE range value does not affect the ZERO range value. If the input value is beyond the sensor limit, or the span is too small, no new FULLSCALE range value will be stored

4. If a damping value change is not required, return the

protective cover over the pushbuttons.

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5.1.3.3 Local Pushbutton Damping Adjustment (Controller OFF)

Adjusting the damping changes the value of the digital filter’s time constant. An installed Digital Meter is recommended for this procedure so that the damping values may be monitored.

1. Activate the Pushbutton Damping Mode.

Simultaneously press and hold, for 5 seconds or more, the

FULLSCALE and ZERO pushbuttons, then release both pushbuttons. Note the following.

• The Damping Mode is automatically de -activated

when a 1 minute "mode active" period times-out. If a change is not made, the present value is retained.

• When both pushbuttons are pressed a "PB"

annunciator will appear on the Digital Meter. If the pushbuttons have been held on for the required minimum 5 seconds, when they are released, the "PB" annunciator will remain on and the Digital Meter will alternately display the letters "SEC" (for seconds) and the present damping value in seconds.

2. Select a new damping value. The damping value choices

are: 0, 0.5, 1, 2, 5, 10, 20, 30, 60, 90, and 120 seconds.

Repeatedly press the ZERO pushbutton to step down or

the FULLSCALE pushbutton to step up through the list.

Select a time constant from the list that is closest to the

desired value.

3. Simultaneously press, then release, both pushbuttons. The

new value is stored in memory and normal operation is restored.

4. Restore protective cover over pushbuttons.

5. To set damping without a digital meter activate the

pushbutton mode as described in step 1 above.

6. Repeatedly press the ZERO pushbutton at least ten times

to set the damping value to zero seconds.

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7. Refer to step 2 above and select the new damping value.

Count the number of steps (damping values) from “0” seconds to the selected value. This number “N” will be used in the following step 8.

8. Press and release the FULLSCALE pushbutton “N”

times to step to the selected damping value.

9. Perform steps 3 and 4 above.

5.1.3.4 Local Pushbutton AUTO/MANUAL, SETPOINT and VALVE Adjustments (Controller ON)

These procedures assume the Transmitter-Controller is field mounted to an operating process and contains an optional Digital Meter to display the AUTO or MANUAL control mode and PROCESS VARIABLE, SET POINT, and VALVE values.

Open the sliding cover on top of the Transmitter's housing to access the ZERO/FULLSCALE pushbuttons (Figure 1-1), then refer to the following procedures to make any required changes to the Controller's operation.

A. Change AUTO/MANUAL Control Mode

The active control mode is shown by a lit "A" (AUTO)

or "M" (MANUAL).

IMPORTANT

If the present control mode is AUTO, and the Controller's A/M TRANSFER BLOCK has been configured for "AUTOMATIC MODE ONLY", a change from AUTO to MANUAL cannot be made using the pushbuttons.

1. Note the present control mode as indicated in the

Digital Meter. Simultaneously press and hold, for a minimum of 5 seconds, the ZERO/FULLSCALE pushbuttons, then release both buttons.

2. Confirm the transfer of mode control from "A" to

"M" or "M" to "A".

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B. Change SET POINT

1. The Controller must be in the AUTO control mode to

change the SET POINT; if not, place the Controller in the AUTO control mode.

2. Press and hold, for a minimum of 5 seconds, the

ZERO pushbutton, then release the button.

The "SP" and "PB" annunciators shall be lit and the

"PV" annunciator shall be extinguished.

The displayed number is the active SET POINT

value.

3. Select new SET POINT. Note the following.

• Cycling (pressing and releasing in less than 1

second) the ZERO or FULLSCALE pushbutton respectively decrements or increments the SET POINT in 0.01% increments of span.

• Pressing and holding either pushbutton, for more

than 1 second, initiates a special acceleration algorithm whereby the SET POINT changes in greater and greater increments until limiting occurs.

• The new SET POINT value is changed in RAM

only and not yet stored permanently in memory. If the Pushbutton Mode times-out before storage is accomplished, the Controller will operate with the new SET POINT; however, the new value will be lost after a power-down or Master Reset.

C. Store New SET POINT to Memory (new Power-Up

Setpoint Valve in Setpoint Track & Hold Block)

1. Simultaneously press and release both pushbuttons to

store new SET POINT.

After SET POINT storage, the Controller exits the

Pushbutton Mode and returns to normal operation.

D. Change VALVE

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1. The Controller must be in the MANUAL control mode to change the VALVE; if it is not, place the Controller in the MANUAL control mode.

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2. Press and hold, for a minimum of 5 seconds, the FULLSCALE pushbutton, then release the button. Note the following.

• The "V", "%", and "PB" annunciators shall be lit

and the "PV" annunciator shall be extinguished.

• The displayed number is the VALVE position in

percent (-1 to 110).

• Interpreting a VALVE Open/Close position

depends upon knowing if the FINAL CONTROL ELEMENT is configured as REVERSE or DIRECT acting. For DIRECT acting, 0% indicates a fully closed valve and 100% indicates a fully opened valve. The opposite is true for a REVERSE acting controller.

3. Select new VALVE between -1.0% and 110%. Note the following.

• Cycling (pressing and releasing in less than 1

second) the ZERO or FULLSCALE pushbutton respectively decrements or increments the VALVE in 0.01 % increments.

• Pressing and holding either pushbutton, for more

than 1 second, initiates a special acceleration mode whereby the VALVE changes in greater and greater increments until limiting occurs.

• The new value is changed in RAM only and not

yet stored permanently in memory. If the Pushbutton Mode times-out before storage is accomplished, the Controller will operate with the new VALVE; however, the new value will be lost after a power-down or Master Reset.

E. Store New VALVE to Memory (new Power-Up Valve

in Auto Manual Transfer Block)

1. Simultaneously press and release both pushbuttons to store new VALVE.

After VALVE storage, the Controller exits the

Pushbutton Mode and returns to normal operation.

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OVRD

EXIT

5.1.4 Quick Access Key Operation

Dev ID: 210300003C Tag: TTC-101 ADD: 00

LOOP CAL/ CON -

TEST FIG

M: 76.534 deg F I: 3.8377 mA P: 63.272 deg F

TREND WHICH VAR? MEASURED VARIABLE SELPREV NEXT END ECT

ENTER SAMPLING TIME SECONDS EN < END TER

WARNING: TREND TIME MUST FALL BETWEEN 1 AND 300 SECONDS.

END

MXC Quick Access keys are used to view transmitter parameters while the MXC is on-line and communicating with a transmitter (refer to Section 2). Eight Quick Access keys are used with the Model 344: TRANS. VAR'S., TREND, ZOOM, and STATUS, are available with the controller ON or OFF. CHANGE SP, CHANGE VALVE, A/M and TUNE are only available when the controller is ON. Press a key to access live transmitter data.

NOTE

Conserve battery power. Do not leave the MXC

in the on-line mode.

1. Establish communication with a transmitter, see Section 3.2, and go to the On-Line Menu (adjacent).

2. Press a Quick Access key to view the desired transmitter parameter(s) at the On-Line Menu. The following paragraphs will describe how to view these parameters.

TRANS. VAR'S. - displays updated on-line transmitter

parameters. These parameters include the measured variable (MV), the current output (I), the process variable (PV) and their respective units or the Process (P), Set Point (S) and Valve (V) controller variables.. Exit this screen by again pressing the TRANS. VAR'S. key or pressing END.

TREND - displays the adjacent screen to select the variable

to be trended.

1) Press PREV or NEXT to toggle between Process

Variable, Measured Variable, and Valve with the Controller “ON.”

2) Press SELECT to enter a value. Pressing END will exit

this procedure and display the On-Line Menu.

3) Type the desired sample time: range 1-300 seconds;

default is 1 second. Thirteen samples (maximum) of the variable can be shown while sampling at the sample time chosen.

If the sample time entered is greater than 300 seconds, a

Warning message will appear that shows the range of values.

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EXIT

400.00

105.24 F4=EXIT

-20.005

ENTER ZOOM VALUE

EN < END TER

122.01

105.24 F4=EXIT

84.005

MODEL NUMBER 344 BN5N1G SOFTWARE REV 01

S/N EXIT

TTC-101 AUTOMATIC

CONT END

SENSOR S/N: 0009C1

4) Press ENTER. The following are shown in the adjacent

screen: Upper and Lower Range Values stored in the transmitter, the current transmitter reading and the thirteen sample trend.

5) Press either TREND or F4 to exit this screen.

ZOOM - expands a portion of a selected variable's trend. Zoom is selected from the Trend screen.

1) Press ZOOM to display the adjacent screen. Type a

zoom value.

If the value is outside the transmitter's range, a Caution

screen will appear with a selection to show the range of possible values.

The MXC will display the trended variable within the

zoom range chosen (i.e. zoom range = 10% of the transmitter range, centered on the zoom value entered) on the screen. The screen will show:

- Upper and Lower Range Values of zoomed range

- current transmitter reading

- trend of thirteen samples

2) Press either F4 to exit to the Trend screen or ZOOM to

return to the Enter Zoom Value screen.

3) Press EXIT in the Trend screen to go to the On-Line

Menu.

STATUS - displays the transmitter’s tagname and existing

status’s. See adjacent screen.

1) Press CONT to display the transmitter's model number,

and software revision number. Pressing EXIT will end this display.

2) Press S/N to show the sensor serial number. Pressing

EXIT will return to the Status screen.

3) Press EXIT twice to go to the On-Line Menu.

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S: 50.000% NEW SETPOINT:

0.0000 TO 100.00

END

ENTER

VALVE: 10.000% NEW VALVE:

-1.000 TO 110.00

END

ENTER

STATUS: AUTOMATIC

MANUAL

PV 47.625 SP 47.625 V 56.000 ACTION REVERSE CONT

PV 99.930 SP 99.930 V 50.210 PG TI TD CONT

PV 23.000 SP 47.000 V 10.000 DG MR END CONT

AUTO

END

CHANGE SP - allows you to view and change the on-linesetpoint of the controller.

1) Enter new setpoint and press ENTER (F4) to store the

value.

2) Press the “CHANGE SP” key again or END (F3) to

exit.

CHANGE VALVE - allows you to view and change the position of the valve in MANUAL. If the controller is in AUTO, the valve cannot be changed.

1) Enter the new valve setting and press ENTER (F4) to

store the new value.

2) Press the “CHANGE VALVE” key again or END (F3)

to exit.

A/M - toggles the controller between automatic and manual control

1) Press MANUAL (F1) or AUTO (F2) to change state.

2) Press “A/M” key again, or END (F4) to exit.

TUNE - displays controller tuning parameters for viewing or editing.

1) The first screen displays the Process, Setpoint, and

Valve settings and the controller action. Press CONT (F4) to continue.

2) The Proportional Gain (PG), Time Integral (TI) and Time

Derivative (TD) can be changed from this screen. Press F1, F2, or F3 to display the current value and edit the parameter.

3) Press CONT (F4) to continue.

4) The Derivative Gain (DG) and Manual Reset (MR) can

be changed from this screen. Press F1 or F2 to display the current value and edit the parameter.

5) Press CONT (F4) to go to the previous screen. Press

the “TUNE” key again, or END (F3) to exit.

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5.2 OFF-LINE OPERATION Off-line operations include editing parameters in a transmitter

configuration stored in an MXC archive for downloading at a later time to a transmitter. The first part of this section describes off-line configuration editing. The second part explains downloading a configuration to a transmitter.

An archive is a transmitter configuration stored in the MXC. It resides in a specific location in the MXC's On-Line Memory. This Memory can store up to 100 configurations, numbered 0-99. To save time and reduce errors, simply recall and edit an archived configuration rather than creating a completely new configuration.

Configurati ons created using the MXTC Configuration Software (PN 15939-41Vn.nn*) running on a personal computer can be downloaded to and archived in the MXC.

* Vn.nn is the software version number.

5.2.1 Using Off-Line Operations to Access an Archive

SELECT FUNCTION

FIND ARCH TEST XMIT FUNC MXC END

ENTER ARCHIVE # (0-99) OR TAG: EN < > END TER

WARNING : ARCHIVE CONTAINS NO DATA A BORT CONT

1. At the Main Menu, press ARCH FUNC to go to the Enter Archive # screen (Off-Line Archive menu).

2. To call an archived configuration, type the archive number or the tagname of a transmitter and press ENTER.

To create a new configuration to be archived, type an unused

archive number (0-99) and press ENTER.

3. Select one of the following:

Ÿ If there is no data stored in this archive, a Warning

screen appears. Press ABORT to exit the archive function or press CONT to continue. Go to step 4.

ARCHIVE 97 FTC1300 SELECT A FUNCTION EDIT CLR ARCH ARCH END

Ÿ If the configuration at this archive number is no longer

needed, press CLR ARCH to erase it. Press END to exit this screen.

Ÿ To review or edit the configuration, press EDIT ARCH.

Press CONT and select a function block to view or edit, then return to this section and go to "After configuration is complete." step 1.

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SELECT X-MITTER TYPE TEMP CONTROLLER

END

SELECT

ARCHIVE 97 DEFAULT SELECT A FUNCTION EDIT ARCH END

CONFIGURATION COMPLETE REQUIT SAVE VIEW

SAVE TO ARCHIVE 97 DEFAULT NEW YES ARCH END

ERROR! ARCHIVE TYPE DOESN'T MATCH THE TRANSMITTER TYPE CONT

WARNING: TAG NAME USED ENTER NEW TAG NAME. CONT

4. Use PREV and NEXT to select the transmitter type Temperature - then press SELECT. The default configur ation for a temperature transmitter will be loaded into the Off-Line Memory of the MXC.

5. The next screen shows the archive number to be edited. Press either EDIT ARCH to begin editing or END to select another archive number.

6. Press CONT to continue and select a configuration block for editing. Refer to Section 5.1.1 to edit configuration parameters.

Press QUIT to return to the previous screen.

After configuration is complete:

1. Press END in the Function Block menu to access the following three choices from the adjacent screen.

QUIT - go to the Main Menu and end configuration.

REVIEW - return to the Function Block menu to make any

changes or additions. Refer to Section 5.1.1 as necessary.

SAVE - show the archive number and tagname of the

current configuration and provide the option to save the configuration either under the current archive number or under a new number. Go to step 2.

2. Press YES in the Save Archive screen to save the archive under the current number. Perform one of the two steps below:

Ÿ If the new configuration will overwrite an existing

archive, the MXC will provide a warning me ssage before the store operation is performed. Press ENTER to continue.

Ÿ If the tagname of a new configuration has already been

assigned to an archived configuration, a WARNING screen appears. Press CONT to move to the TRANSMITTER ID block and display the tag selection.

- If the tagname is not to be changed, press either

SEL/END to return to the Save Archive screen or SEL/CONT to return to the previous screen.

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- If the tagname is changed, press SEL/END or

SEL/CONT to return to the original Save screen. Follow the prompts to save the configuration in the MXC.

5.2.2 Using an Archive in OnLine Memory

CONFIGURATION MODE

An archived configuration can be accessed using the MXC during On-Line operations through the configuration mode.

1. Press CONFIG at the On-Line menu screen to display:

EDIT EDIT ARCH CONF END

ENTER ARCHIVE # (0-99) OR TAG: EN < > END TER

EDIT ARCH, EDIT CONF, and END.

2. Select EDIT ARCH to call an archived configuration from MXC memory.

3. At the adjacent screen, type the archive number or the tagname of the configuration to be edited and press ENTER.

ARCHIVE 97 DEFAULT SELECT A FUNCTION EDIT ARCH END

Ÿ If the archive contains data, the next screen will provide

the option of editing the archive or downloading the archive directly to the transmitter.

WARNING : ARCHIVE CONTAINS NO DATA A BORT CONT

Ÿ If the archive contains no data, a Warning message will

appear and default configuration data will be loaded into the On-Line memory. Press CONT to edit or download the configuration.

ERROR! ARCHIVE TYPE DOESN'T MATCH THE TRANSMITTER TYPE CONT

Ÿ If the archive contains data that does not match the

current transmitter type, an Error message will appear. Press CONT to choose a new archive number.

4. Press either EDIT ARCH to edit the configuration as described in section 5.1.1 or DOWNLOAD to download the configuration to the transmitter and bring up a series of screens.

When download is chosen, the MXC will display:

Ÿ A prompt if there are any differences between the

downloaded configuration data and the configuration

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resident in the transmitter simply respond to the prompt, continue or abort.

September 1995

Siemens UM344-2 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual