Yokogawa UT350L Operating Manual

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User’ s Manual

Model UT350L Limit Controller

Communication Functions User’s Manual

IM 05D01D21-10E

2nd Edition

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Introduction

This user’s manual describes the communication functions of the UT350L controller and provides information on how to create communication programs.

The UT350L controller use the following communication protocols:

1) PC link communication protocol

2) Ladder communication protocol

The UT350L controller cannot communicate with a host device that uses a communication protocol other than the above.

Y ou are required to understand the communication specifications of host devices, as a background knowledge, in regard to their communication hardware, language used for creating communication programs, and so on.

* Host devices: PCs, PLCs (sequencers), graphic panels, and others

■ Intended Readers

This manual is intended for people familiar with the functions of the UT350L controller such as control engineers and personnel in charge of the maintenance of instrumentation and control equipment.

■ Related Documents

The following user’s manuals all relate to the communication functions of the UT350L controller. Read them as necessary. The codes enclosed in parentheses are the document numbers.

•

UT350L User’s Manual -Installation, Initial Setting, and so on.

(IM 05D01D21-01E to 03E)

Explains the basic operation of the UT350L controller .

■ Regarding This User’s Manual

(1) This manual should be provided to the end user. Keep an extra copy or copies of the

manual in a safe place.

(2) Read this manual carefully to gain a thorough understanding of how to operate this

product before starting operation.

(3) This manual describes the functions of this product. Yokogawa Electric Corporation

(hereinafter simply referred to as Yokogawa) does not guarantee the application of these functions for any particular purpose.

(4) Under absolutely no circumstances may the contents of this manual, in part or in

whole, be transcribed or copied without permission. (5) The contents of this manual are subject to change without prior notice. (6) Every effort has been made to ensure that the details of this manual are accurate.

However, should any errors be found or important information be omitted, please

contact your nearest Yokogawa representative or our sales office.

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■ Safety Precautions

The following symbol is indicated on the controller to ensure safe use.

This symbol on the controller indicates that the operator must refer to an explanation in the user’s manual in order to avoid the risk of injury or death of personnel or damage to the instrument. The manual describes how the operator should exercise special care to avoid

CAUTION

electric shock or other dangers that may result in injury or loss of life.

The following symbols are used in the hardcopy user’s manuals and in the user’s manual supplied on the CD-ROM.

NOTE

Indicates that operating the hardware or software in a particular manner may damage it or result in a system failure.

IMPORTANT

Draws attention to information that is essential for understanding the operation and/or features of the controller.

■ Force Majeure

(1) Y okogawa assumes no liability to any party for any loss or damage, direct or indirect,

caused by the use or any unpredictable defect of the product. (2) No portion of the software supplied by Yokogawa may be transferred, exchanged,

leased or sublet for use by any third party without the prior permission of Yokogawa. (3) Be sure to use the spare parts approved by Yokogawa when replacing parts or

consumables. (4) Use this software with one specified computer only . You must purchase another copy

of the software for use on each additional computer. (5) Copying this software for purposes other than backup is strictly prohibited. (6) Store the floppy disk(s) (original medium or media) containing this software in a

secure place.

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■ Regarding Protection, Safety , and Prohibition Against Unauthorized

Modification

(1) In order to protect the product and the system controlled by it against damage and

ensure its safe use, make certain that all of the instructions and precautions relating to

safety contained in this document are strictly adhered to. Yokogawa does not guaran-

tee safety if products are not handled according to these instructions. (2) Modification of the product is strictly prohibited. (3) Reverse engineering such as the disassembly or decompilation of software is strictly

prohibited.

iii

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

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Model UT350L Limit Controller User’s Manual

Introduction........................................................................................................... i

1. Communications Overview.................................................................... 1-1

1.1 Interface Specifications.................................................................................. 1-1

2. Setup ....................................................................................................... 2-1

2.1 Setup Procedure ............................................................................................. 2-1

2.2 Wiring for Communication ............................................................................. 2-2

2.3 Notes on Setting Communication Parameters.............................................. 2-4

Toc-i

IM 05D01D21-10E 2nd Edition

2.2.1 Wiring to a Personal Computer ......................................................... 2-2

2.2.2 Wiring to a PLC (Sequencer) or Graphic Panel ................................. 2-3

2.3.1 Procedure to Set Communication Parameters .................................. 2-4

2.3.2 Description of Communication Parameters ....................................... 2-4

3. PC Link Communication ........................................................................ 3-1

3.1 Overview.......................................................................................................... 3-1

3.1.1 Configuration of Commands ............................................................. 3-2

3.1.2 Configuration of Response ............................................................... 3-4

3.2 Communication with Host Device.................................................................. 3-5

3.2.1 List of Commands............................................................................. 3-6

3.2.2 Specifying Broadcast ........................................................................ 3-7

3.2.3 Commands....................................................................................... 3-8

3.2.4 Response Error Codes ................................................................... 3-21

4. Ladder Communication.......................................................................... 4-1

4.1 Overview.......................................................................................................... 4-1

4.1.1 Configuration of Commands ............................................................. 4-2

4.1.2 Configuration of Response ............................................................... 4-3

4.2 Communication with PLC............................................................................... 4-4

4.2.1 Reading Data ................................................................................... 4-5

4.2.2 Writing Data...................................................................................... 4-6

4.2.3 Response Error Codes ..................................................................... 4-7

4.3 Communication with MELSEC ....................................................................... 4-8

4.3.1 Preparing for Communication ........................................................... 4-9

4.3.2 Wiring ............................................................................................... 4-9

4.3.3 Setting Communication Specifications ............................................ 4-10

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5. Functions and Use of D Registers ......................................................... 5-1

Toc-ii

5.1 Overview.......................................................................................................... 5-1

5.2 Interpretation of D Register Tables ................................................................ 5-1

5.3 Classification of D Registers.......................................................................... 5-2

5.4 Process Data and User Area .......................................................................... 5-3

5.4.1 Process Data Area (Read-only) ........................................................ 5-4

5.4.2 User Area ......................................................................................... 5-5

5.5 Alarm Setpoint, Bias, and Filter Parameters ................................................. 5-6

5.5.1 Data Area for Alarm Setpoint, Bias, and Filter Parameters ................ 5-7

5.6 SP Parameter .................................................................................................. 5-8

5.6.1 Data Area for SP Parameter ............................................................. 5-9

5.7 Alarm Type, Limit Control Type Selection, and

Retransmission Parameters......................................................................... 5-10

5.7.1 Data Area for Alarm Type, Hysteresis, Limit Control Type Selection

Parameters..................................................................................... 5-12

5.7.2 Data Area for Retransmission and Key-lock Parameters................. 5-12

5.8 PV Input, Control Output, and Communication Parameters ...................... 5-13

5.8.1 Data Area for PV Input, and Communication Parameters................ 5-14

6. Functions and Use of I Relays ............................................................... 6-1

6.1 Overview.......................................................................................................... 6-1

6.2 Status I Relays ................................................................................................ 6-1

6.3 User Area ......................................................................................................... 6-2

Revision Information ............................................................................................ i

IM 05D01D21-10E

2nd Edition: Jul. 30, 2004-00

1. Communications Overview

The UT350L controllers have an RS-485 serial communication interface, through which data exchange is performed with a device such as a personal computer , PLC (sequencer), and graphic panel.

The following five communication protocols are supported.

Table 1.1 Communication Protocols

Communication protocol Protocol specification

PC link communication

Ladder communication

Table 1.2 Connectable Devices

Communication protocol Connectable device Requirements

PC link communication

Ladder communication

Without sum check With sum check Handshaking

Personal computer Graphic panel PLC (sequencer) PLC (sequencer)

RS-232C/RS-485 converter

With serial communication module With ladder communication module

1-1

1.1 Interface Specifications

Table 1.3 RS-485 Interface

Interface Baud rate Other specifications Protocols available

Standard RS-485

Communication

system

4-wire, half-duplex

600, 1200 2400, 4800 9600bps

2-wire, half-duplex

- Asynchronous (start-stop)

- Handshaking

- Maximum communication distance: 1200 m

- Maximum number of connectable devices: 31

- Start bit: 1

- Data length: 8 or 7 bits

- Parity: No parity, even, odd

- Stop bit: 1 or 2

PC link communication

Ladder communication

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2. Setup

This chapter describes the procedure to set up the communication functions and also refers to some notes on wiring and communication parameters.

2.1 Setup Procedure

Set up the communication functions of the UT350L controller as follows:

Connect a host device and a UT350L controller. (See section 2.2.)

Set up the communication parameters of the UT350L controller. (See section 2.3.)

Create communication programs for the host device to perform communication.

Create communication programs referring to the documentation of each host device.

In this manual, “host devices” generically denotes PCs, PLCs (sequencers), and graphic panels.

2-1

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2.2 Wiring for Communication

Connect the UT350L controller and the host device for communication. The wiring procedures and precautionary notes are as follows.

NOTE

• T o avoid an electrical shock, be sure to turn off the power supply source to the equipment involved before you start wiring.

• Use crimp terminals at cable ends.

• Before you start wiring, read the user’s manual of each device.

2.2.1 Wiring to a Personal Computer

Since general personal computers cannot directly be connected to the RS-485 interface, wiring must be provided via an RS-232C/RS-485 converter. The following figures show the wiring for 4-wire connection and 2-wire connection.

2-2

● 4-wire connection

RS-232C straight cable

● 2-wire connection

RS-232C straight cable

Terminating resistor

220Ω1/4W

JIS Class 3 grounding (grounding resistance

of 100Ω or less)

Terminating resistor

220Ω1/4W

JIS Class 3 grounding (grounding resistance

of 100Ω or less)

Z-101HE UT350L UT350L

TD(+) TD(-) RD(+) RD(-) SHIELD

Communication cable

JIS Class 3 grounding (grounding resistance

of 100Ω or less)

ML1- UT350L UT350L

B(+)

A(-)

4 6

Communication cable

JIS Class 3 grounding (grounding resistance

of 100Ω or less)

23 24 25 26 27

Communication cable

JIS Class 3 grounding (grounding resistance

of 100Ω or less)

23 24 25 26 27

Communication cable

JIS Class 3 grounding (grounding resistance

of 100Ω or less)

SDB(+) SDA(-) RDB(+) RDA(-)

23 24 25 26 27

Terminating resistor

220Ω1/4W

Terminating resistor

220Ω1/4W

Note: Z-101HE and ML1-■ are the converters of Sharp Corporation and Y okogawa Electric Corporation, respectively . You can also use other RS-232C/RS-485 converters. Before you use another converter, check its electrical specifications.

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2.2.2 Wiring to a PLC (Sequencer) or Graphic Panel

Since general PLCs (sequencers) and graphic panels have an RS-485 interface, they can be directly connected to a UT350L controller. If your PLC (sequencer) or graphic panel has an RS-232C interface, see subsection 2.2.1.

2-3

● 4-wire connection

● 2-wire connection

PLC or graphic panel UT350L UT350L

RDB(+)

Terminating

resistor

220Ω1/4W

JIS Class 3 grounding (grounding

resistance of 100Ω or less)

PLC or graphic panel UT350L UT350L

Terminating

resistor

220Ω1/4W

JIS Class 3 grounding (grounding

resistance of 100Ω or less)

RDA(-) SDB(+) SDA(-) SG

Communication cable

B(+) A(-)

Communication cable

23 24 25 26 27

Communication cable

JIS Class 3 grounding (grounding

resistance of 100Ω or less)

23 24 25 26 27

Communication cable

JIS Class 3 grounding (grounding

resistance of 100Ω or less)

SDB(+) SDA(-) RDB(+) RDA(-)

23 24

Terminating resistor

25 26 27

23 24 25 26 27

220Ω1/4W

Terminating resistor

220Ω1/4W

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2.3 Notes on Setting Communication Parameters

This section describes the parameters that set up the communication functions and their setting ranges.

NOTE

The communication specifications of both the UT350L controller and the host device must be the same. Check the communication specifications of the host device first, then set up the communication parameters of the UT350L controller .

2.3.1 Procedure to Set Communication Parameters

For the operation procedure, see the User’s Manual of UT350L controller . The UT350L are shipped from the factory with the following communication specifications.

Table 2.3.1 Protocol-by-Protocol Default Parameter Settings

2-4

Communication protocol PSL BPS

PC link communication (without sum check) PC link communication (with sum check) Ladder communication

Note: Circled numbers denote fixed values (i.e., the parameters can neither be shown nor changed).

0 1 2

9600 9600 9600

PRI

EVEN EVEN EVEN

2.3.2 Description of Communication Parameters

Table 2.3.2 Communication Parameters of UT350L controller

Parameter name

Protocol selection

Address Baud rate Parity Stop bit Data length Minimum response time

*1: Data length is fixed at 8 bits for ladder communication is selected.

Parameter code

PSL

ADR

BPS

PRI

STP

DLN

RP.T

PC link communication

Ladder communication

600, 1200, 2400, 4800, 9600 (bps)

NONE (no parity), EVEN, ODD

Setting range

0: Without sum check 1: With sum check

2: Ladder communication

1 to 99

1, 2 (bit)

7, 8 (bit)

0 to 10 (×10 ms)

STP

1 1 1

DLN

8 8 8

Default

9600

EVEN

1 8 0

1) Protocol selection (PSL)

Set the same communication protocol as that of the host device to be connected to. The UT350L controller supports PC link and ladder communication protocols, which are specific to UT350L controller .

2) Baud rate (BPS)

Set the same baud rate as that of the host device to be connected. (Otherwise, proper communication cannot be achieved.) The unit of baud rate is bps (bits per second).

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3) Address number (ADR)

Set the address number of the UT350L controller to one that is not being used by another controller. An address number of 1 to 99 can be assigned in any order. Note that the number of UT350L controllers that can be connected to a single communication port is limited to 31.

Example of connecting four UT350L controllers to a host device with address numbers of 1, 50, 10, and 20:

Max. 1200 m; the maximum number of slave units: 31

2-5

ADR=1 ADR=50 ADR=10 ADR=20

4) Parity (P ARI)

Set the handling of parity to be carried out when data is sent or received. Set the same parity state as that of the host device to be connected.

5) Stop bit (STP)

Set the same stop bit as that of the host device to be connected.

6) Data length (DLN)

Set the same data length as that of the host device to be connected. (When ladder communication is selected, the data length is fixed.)

7) Minimum response time (RP.T)

Set the time taken to respond to the host device after the UT350L controller receives transmission data from it. The unit is 10 ms. The response time will be “communication processing time + the set value of RP.T X 10” milliseconds.

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3. PC Link Communication

3.1 Overview

PC link communication protocol is one of the protocols used to communicate with devices such as PCs, PLCs (sequencers), and graphic panels. Via this communication protocol, these devices can exchange data with a UT350L controller by reading/writing the controller’s internal registers (D registers and I relays).

Hereafter, PCs, PLCs (sequencers), and graphic panels shall be referred to as “host devices.”

In PC link communication, a host device identifies UT350L controller with a communication address, which ranges from 1 to 99. However, broadcasting, which requires no address number, is possible with some of the commands. For more information, see subsection

3.2.2.

3-1

Max. 1200 m; the maximum number of slave units: 31

UT350L controllers

Figure 3.1 Connection of PC Link Communication

The next section will discuss the configuration of commands and responses.

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3.1.1 Configuration of Commands

Commands sent from a host device to a UT350L controller consist of the following elements.

3-2

Number of bytes

Element

STX

(1) (8) (9)(2) (3) (4) (5) (6) (7)

Address number

(ADR)

CPU number

Time to wait

for response

Command

Variable length

Data corresponding

to command

Checksum

ETX1CR

(1) STX (Start of Text)

This control code indicates the start of a command. The character code is CHR$(2).

(2) Address Number (01 to 99)

Address numbers are used by a host device to identify which UT350L controller to communicate with. (ID number of the UT350L)

Adress Number = UT350L parameter (ADR) value

(3) CPU Number

This number is fixed to 01.

(4) Time to W ait for Response

This is fixed to 0.

(5) Command (See subsection 3.2.1.)

Specify a command to be issued from the host device.

(6) Data Corresponding to Command

Specify an internal register (D register or I relay), number of data items, UT350L parameter values, or others.

(7) Checksum

In PC link communication with sum check, the ASCII codes of the text between STX and the checksum are converted into hexadecimal values and added on a byte basis. Then the lowermost byte of the added results is turned into ASCII code, and its lower byte is used as the checksum.

This 2-byte space is unnecessary for PC link communication without sum check.

(8) ETX (End of Text)

This control code indicates the end of a command string. The character code is CHR$(3).

(9) CR (Carriage Return)

This control code marks the end of a command. The character code is CHR$(13).

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NOTE

The control codes STX, ETX, and CR in commands are indispensable. Do not miss any of them when you create a communication program for PC link communication. A communication failure will result if any of them are omitted or if the order is incorrect.

● Data Forms of Commands

The table below shows the data forms of D registers and I relays.

Table 3.1 Data Forms

Data type Data content Data form

PV high and low limits, target setpoints, and others

Bias, deviation alarms, and others Limit control types, alarm types, and others

* Parameter list of UT350L controller User’s Manual for information about data form.

Measuring range (EU) data

Measuring range span (EUS) data Seconds, absolute values, and data

without unit*

Numeric data excluding the decimal point

Numeric data excluding the decimal point Absolute value excluding the decimal point

3-3

● Command Format for Communication

Example: When setting a target setpoint “50.0” to a UT350L controller , the host device sends the value “500” as command data without the decimal point (this is true for both settings 5.00 or 500).

Data to be sent from the host device: 500

Command data: 500

UT350L side

Target setpoint: 50.0

* The position of the decimal point for “500” is determined by the DP (decimal point position) parameter of the UT350L controller.

Response data from UT350L: 500

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3.1.2 Configuration of Response

Responses from a UT350L controller with respect to a command sent from the host device consist of the elements shown below, which dif fer depending on the condition of communication - normal or failure.

1) With Normal Communication

When communication is carried out normally , the UT350L controller returns the character string “OK” and, in response to read commands, also returns read-out data.

3-4

Number of bytes

Element1STX

Address number (ADR)2CPU number:012OK

Variable length

Parameter data

Checksum

2) In the Event of Failure

If communication is carried out abnormally , the UT350L controller returns the character string “ER” and error codes (EC1 and EC2). (See subsection 3.2.4, Response Error Codes.)

• No response is made in case of an error in address number specification or CPU number specification.

• If a UT350L controller cannot receive an ETX contained in a command, a response may not be made.

* As a measure against these situations, provide a timeout processing in the communica-

tion functions or communication programs of the host device.

Number of bytes

Element

STX

Address number

(ADR)

CPU number:

2ER2

EC12EC23Command2Checksum

ETX1CR

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3.2 Communication with Host Device

In PC link communication, when specifying D registers or I relays (internal registers of UT350L controller), you can use the numbers as is. The numbers of these internal registers are in the following format:

• D registers: D**** (****: numeric value)

• I relays : I**** (****: numeric value)

Host devices to be connected to a UT350L controller are those capable of handling the PC link communication protocol.

(1) Connectable graphic panels

Graphic panels that can be connected to a UT350L controller are listed below . However, it may be possible to connect graphic panels other than the ones listed below .

Table 3.2 List of Graphic Panels Connectable

Product Name Name Remarks

Pro-face by Digital Electronics Corporation

Note: For more information about Digital’s graphic panels, contact Digital Electronics Corporation. (Be careful because the display device differs depending on the model.)

GP70 series GP-J series GP-230 series GP-430 series GP-530 series

Graphic control panel High-speed graphic control panel Medium-size graphic control panel Advanced, high-speed graphic control panels

3-5

(Note)

(2) Communication with F A-M3 with UT-link module

No ladder communication program is required to communicate with FA-M3 with UT-link module (Y okogawa PLC). The UT -link module’s function offers 2 modes, in which users can exchange data without paying attention to the communication procedure. (For more information, see the user’s manual of UT-link module “IM 34M6H25-01E.”)

● User-specifiable mode: Always reads/writes the user-specified devices* of the UT350L controller .

● Command mode: Accesses the devices* of the UT350L controller only when necessary.

*:“Device” here denotes the internal registers of the UT350L controller (D registers and I relays).

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3.2.1 List of Commands

The following are the lists of commands available in PC link communication. The details of them are explained in the description of each command.

(1) Bit-basis Access Commands Dedicated to I Relays

Command Description Number of bits handled

BRD BWR BRR BRW BRS BRM

(2) Word-basis Access Commands

Command Description Number of words handled

WRD WWR WRR WRW WRS WRM

Bit-basis read Bit-basis write Bit-basis, random read Bit-basis, random write Specifies I relays to be monitored on a bit-by-bit basis. Bit-basis monitoring

Word-basis read Word-basis write Word-basis, random read Word-basis, random write

Specifies internal registers to be monitored on a word-by-word basis.

Word-basis monitoring

1 to 256 bits 1 to 256 bits 1 to 32 bits 1 to 32 bits 1 to 32 bits —

1 to 64 words 1 to 64 words 1 to 32 words 1 to 32 words 1 to 32 words —

3-6

(3) Information Commands

Command Description Number of controllers handled

INF Reads model, version, and revision 1

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3.2.2 Specifying Broadcast

Broadcast addressing allows the corresponding multiple UT350L controller to receive the command.

(1)In the command, specify the broadcast address in Table 3.3 and execute it. (2)Broadcast addressing works independently of the communication address of the

controller.

(3)Broadcast addressing is only applicable to write commands. (4)No response is returned when broadcast addressing is used.

Broadcast data.

* No response from slaves

Higher-level device (master)

Max.: 1200 m; the maximum number of slaves: 31

3-7

Figure 3.2 Broadcasting

Table 3.3 Address Numbers

Address No. Corresponding devices

01 to 99

All models of GREEN Series Device with a corresponding address number

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3.2.3 Commands

BRD Reads I relays on a bit-by-bit basis.

● Function

Reads the ON/OFF statuses of a sequence of contiguous I relays by the specified number of bits, starting at a specified I relay number.

• The number of bits to be read at a time is 1 to 256.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes the checksum function. When performing

communication without checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

3-8

Number of

Bytes

Command

element

Number of

Bytes

Response

element

STX2Address

number

(ADR)

STX2Address

number (ADR)

CPU

number

CPU

number

BRD

2OK1d11d21

I relay

number

Comma or space

…

Number

of bits

Checksum1ETX1CR

(n)

Checksum1ETX1CR

The response is “0” when the status is OFF or “1” when ON.

dn: read data of the specified number of bits (n = 1 to 256) dn = 0 (OFF) dn = 1 (ON)

● Example:

Reading the status of alarm 1 of the UT350L controller with address number 01

The following command reads the status of alarm 1 (I0097) at address number 01.

[Command] STX$+ “01010BRDI0097, 001A0” +ETX$+CR$

The following response is returned with respect to the above command. (Alarm 1 is ON.)

[Response] STX$+ “0101OK18D” +ETX$+CR$

Alarm has been ON since 1 was returned.

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BWR Writes data into I relays on a bit-by-bit basis.

● Function

Writes ON/OFF data into a sequence of contiguous I relays by the specified number of bits, starting at a specified I relay number.

• The number of bits to be written at a time is 1 to 256.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes a checksum function. When performing commu-

nication without checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

3-9

Number of

Bytes

Command

element

Command (continued)

… …

STX2Address

number (ADR)

Checksum1ETX1CR

CPU

number

BWR

I relay

number

Write information is “0” to set OFF or “1” to set ON.

dn: write data of the specified number of bits (n = 1 to 256) dn = 0 (OFF) dn = 1 (ON)

Number of

Bytes

Response

element

● Example:

STX2Address

number (ADR)

CPU

number

Checksum1ETX1CR

Setting the user-defined flag of the UT350L controller with address number 01 to ON.

Comma

or space

Number

of bits

(n)

Comma or space

1d11

The following command writes ON into the user-defined flag (I0865) at address number 01.

[Command] STX$+ “01010BWRI0865, 001, 113” +ETX$+CR$

Note: The user-defined flags (I relays) are flags that the user can freely read/write. For user’s read/write-accessible areas,

see subsection 3.4.2.

“OK” is returned in response to the command above.

[Response] STX$+ “0101OK5C” +ETX$+CR$

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BRR Reads I relays on a bit-by-bit basis in a random order .

● Function

Reads the ON/OFF statuses of the individual I relays specified in a random order by the specified number of bits.

• The number of bits to be read at a time is 1 to 32.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes a checksum function. When performing commu-

nication without the checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

3-10

Number of

Bytes

Command

element

Command (continued)

… …

Number of

Bytes

Response

element

STX2Address

number

(ADR)

I relay

number

STX2Address

number

(ADR)

Checksum

CPU

number

ETX1CR

CPU

number

BRR

2OK1d11

Number

of bits

(n)

… …

The response is “0” when the status is OFF or “1” when ON.

dn: read data of the specified number of bits (n = 1 to 32) dn = 0 (OFF) dn = 1 (ON)

● Example:

Reading the statuses of alarms 1 and 2 of the UT350L with address number 05

I relay

number

Comma or space

Checksum

I relay

number

ETX1CR

Comma or space

The following command reads the statuses of alarm 1 (I0097) and alarm 2 (I0098) at address number 05.

[Command] STX$+ “05010BRR02I0097, I00989D” +ETX$+CR$

In response to the command above, the ON and OFF responses are returned for alarms 1 and 2.

[Response] STX$+ “0501OK10C1” +ETX$+CR$

Alarm 1 is ON, and alarm 2 is OFF.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

3-11

BRW

Writes data into I relays on a bit-by-bit basis in a random order.

● Function

Writes ON/OFF statuses in the individual I relays specified in a random order by the specified number of bits.

• The number of bits to be written at a time is 1 to 32.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes the checksum function. When performing

communication without the checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

Number of

Bytes

Command

element

Command (continued)

STX

Address

number (ADR)

CPU

number

…

1 0

BRW

Number

of bits

(n)

I relay

number

Comma or space

Comma

or space

I relay

number

Comm

a or

space

Comma

or space

…

I relay

number

Comma

or space

Checksum

ETX1CR

Write information is “0” to set OFF or “1” to set ON.

dn: write data of the specified number of bits (n = 1 to 32) dn = 0 (OFF) dn = 1 (ON)

Number of

Bytes

Response

element

STX

Address

number (ADR)

CPU

number

Checksum

ETX1CR

● Example: Setting four user-defined flags of the UT350L controller with address number 05 to ON, OFF, OFF , and ON.

The following command sets the four user-defined flags (

I0721, I0722, I0723 , and I0724) at

address number 05 to ON, OFF, OFF , and ON, respectively.

[Command] STX$+ “05010BRW04I0721, 1, I0722, 0, I0723, 0, I0724, 18D” +ETX$+CR$

Note: The user-defined flags (I relays) are flags that the user can freely read/write. For user’s read/write-accessible areas,

see subsection 3.4.2.

“OK” is returned in response to the command above.

[Response] STX$+ “0501OK60” +ETX$+CR$

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3-12

BRS

Specifies I relays to be monitored on a bit-by-bit basis.

● Function

Specifies the numbers of I relays to be monitored on a bit-by-bit basis. Note that this command simply specifies I relays. Actual monitoring is performed by the BRM command after the I relay numbers are specified with this command.

When the volume of data is large and you wish to increase the communication rate, it is effective to use a combination of the BRS and BRM commands rather than the BRD command. If the power supply is turned off, the specified I relay numbers will be erased.

• The number of registers to be specified at a time is 1 to 32.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes the checksum function. When performing

communication without the checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

Number of

Bytes

Command

element

STX2Address

number

(ADR)

CPU

number

BRS

Number

of bits

(n)

I relay

number

Comma

or space

I relay

number

Comma

or space

Command (continued)

…

Number of

Bytes

Response

element

I relay

number

STX2Address

Checksum

number

(ADR)

ETX1CR

CPU

number

Checksum

ETX1CR

● Example: Monitoring the stop status of the UT350L controller with address number 05 The following command monitors the stop status (

I0067) at address number 05.

(This command is used simply for specifying registers.)

[Command] STX$+ “05010BRS01I006754” +ETX$+CR$

“OK” is returned in response to the command above.

[Response] STX$+ “0501OK60” +ETX$+CR$

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

BRM Monitors I relays on a bit-by-bit basis.

● Function

Reads the ON/OFF statuses of the I relays that have been specified in advance by the BRS command.

• Before executing this command, the BRS command must always be executed to specify which I relays are to be monitored. If no relay has been specified, error code 06 is returned. This error also occurs if the power supply is turned off.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes the checksum function. When performing

communication without the checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

3-13

Number of

Bytes

Command

element

Number of

Bytes

Response

element

STX2Address

number (ADR)

STX2Address

number (ADR)

CPU

number

CPU

number

BRM

2OK1d11d21

Checksum

ETX1CR

… …

Checksum

ETX1CR

The response is “0” when the status is OFF and “1” when ON.

dn: read data of the number of bits specified by the BRS command (n = 1 to 32) dn = 0 (OFF) dn = 1 (ON)

● Example: Monitoring the stop status of the UT350L controller with address number 05 (This command reads the statuses of the I relays specified by the BRS command.)

[Command] STX$+ “05010BRMD7” +ETX$+CR$

The ON/OFF status of the I relay is returned in response to the command above.

[Response] STX$+ “0501OK160” +ETX$+CR$

The I relay is ON.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

WRD Reads D registers and I relays on a word-by-word basis.

● Function

Reads a sequence of contiguous register information on a word-by-word basis by the specified number of words, starting at the specified register number.

• The number of words to be read at a time is 1 to 64.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes the checksum function. When performing

communication without the checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

3-14

Number of

Bytes

Command

element

Number of

Bytes

Response

element

STX2Address

number

(ADR)

STX

Address

number

(ADR)

CPU

number

CPU

number

1 0

WRD

dddd14dddd2

Comma or space

… …

Number

of words

(n)

ddddn

Checksum

Checksum1ETX1CR

The response is returned in a 4-digit character string (0000 to FFFF) in a hexadecimal pattern.

dddn: Read data of the specified number of words ddddn = character string in a hexadecimal pattern n = 1 to 64

● Example:

Reading a measured input value of the UT350L controller with address number 03

The following command reads the measured input value (D0003) at address number 03.

[Command] STX$+ “03010WRDD0003, 0175” +ETX$+CR$

The measured input value 200 (00C8 (HEX)) is returned in response to the command above.

ETX1CR

[Response] STX$+ “0301OK00C839” +ETX$+CR$

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3-15

WWR

Writes data into D registers and I relays on a word-by-word basis.

● Function

Writes information into a sequence of contiguous registers on a word-by-word basis by the specified number of words, starting at the specified register number .

• The number of words to be written at a time is 1 to 64.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes the checksum function. When performing

communication without the checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

Number of

Bytes

Command

element

Command (continued)

STX2Address

…

number

(ADR)

CPU

number

WWR

Comma

or space

Number

of words

(n)

Comma

or space

dddd1

dddd2

…

ddddn

Checksum1ETX1CR

Write information is specified in a 4-digit character string (0000 to FFFF) in a hexadecimal pattern.

dddn: Write data of the specified number of words ddddn = character string in a hexadecimal pattern n = 1 to 64

Number of

Bytes

Response

element

STX2Address

number

(ADR)

CPU

number

Checksum1ETX1CR

● Example: Writing “200” into the target setpoint of the UT350L controller with address number 03.

The following command writes data 200 (

00C8 (HEX)) into the target setpoint (D0301) at

address number 03.

[Command] STX$+ “03010WWRD0301, 01, 00C890” +ETX$+CR$

“OK” is returned in response to the command above.

[Response] STX$+ “0301OK5E” +ETX$+CR$

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3-16

WRR

Reads D registers and I relays on a word-by-word basis in random order.

● Function

Reads the statuses of the individual registers, on a word-by-word basis, specified in a random order by the specified number of words.

• The number of words to be read at a time is 1 to 32.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes the checksum function. When performing

communication without the checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

Number of

Bytes

Command

element

Command (continued)

…

STX2Address

number

(ADR)

CPU

number

1 0

WRR

Number

of words

(n)

number

Comma

or space

number

Comma or space

…

number

Number of

Bytes

Response

element

Checksum

(n)

STX2Address

number

(ADR)

ETX1CR

CPU

number

dddd14dddd2

… …

ddddn

Checksum

ETX1CR

The response is returned in a 4-digit character string (0000 to FFFF) in a hexadecimal pattern. ddddn = character string in a hexadecimal pattern (n = 1 to 32)

● Example: Reading the measured input and control output values of the UT350L control- ler with address number 10.

The following command reads the measured input value ( (

D0005) at address number 10.

D0003) and control output value

[Command] STX$+ “10010WRR02D0003, D00058B” +ETX$+CR$

The measured input value 200 (00C8 (HEX)) and output value 50 (0032 (HEX)) are returned as the response to the above command.

[Response] STX$+ “1001OK00C80032FC” +ETX$+CR$

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3-17

WRW

Writes data into D registers and I relays on a word-by-word basis in random order.

● Function

Writes register information specified for each register into the registers specified in a random order by the specified number of words.

• The number of words to be written at a time is 1 to 32.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes the checksum function. When performing

communication without the checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

Number of

Bytes

Command

element

Command (continued)

STX2Address

number

(ADR)

CPU

number

…

WRW

Number

of words

(n)

number

Comma or space

dddd1

Comma

or space

number

Comma or space

dddd2

…

number

Comma or space

ddddn

Checksum1ETX1CR

Write information is specified in a 4-digit character string (0000 to FFFF) in a hexadecimal pattern.

ddddn: Repetition of register numbers and write information of the specified number of words ddddn = character string in a hexadecimal pattern n = 1 to 32

Number of

Bytes

Response

element

STX2Address

number

(ADR)

CPU

number

Checksum1ETX1CR

● Example: Writing “20.0” into the target setpoint and “15.0” into the alarm-1 setpoint of the UT350L controller with address number 10.

The following command writes “20.0” into the target setpoint (D0301) and “15.0” into the alarm-1 setpoint (D0915) at address number 10.

[Command] STX$+ “10010WRW02D0301, 00C8, D0915, 00969D” +ETX$+CR$

Target setpoint: 200

Alarm setpoint: 150

“OK” is returned in response to the command above.

[Response] STX$+ “1001OK5C” +ETX$+CR$

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3-18

WRS

Specifies the D registers and I relays to be monitored on a word-by-word basis.

● Function

Specifies the numbers of the registers to be monitored on a word-by-word basis. Note that this command simply specifies the registers. Actual monitoring is performed by the WRM command after the register numbers are specified by this command.

If the volume of data is large and you wish to increase the communication rate, it is effective to use a combination of the WRS and WRM commands rather than the WRD command. If the power supply is turned off, the register numbers specified will be erased.

• The number of words to be specified at a time is 1 to 32.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes the checksum function. When performing

communication without the checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

Number of

Bytes

Command

element

STX2Address

number

(ADR)

CPU

number

WRS

Number of words

(n)

number

Comma or space

number

Comma

or space

Command (continued)

… …

Number of

Bytes

Response

element

STX2Address

Checksum

number

(ADR)

ETX1CR

CPU

number

Checksum

ETX1CR

● Example: Monitoring the measured input value of the UT350L controller with address number 01.

The following command monitors the measured input value (D0003) at address number 01. (This command simply specifies the registers.)

[Command] STX$+ “01010WRS01D000356” +ETX$+CR$

CPU number: 01 D register number: D0003

“OK” is returned in response to the command above.

[Response] STX$+ “0101OK5C” +ETX$+CR$

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3-19

WRM

Monitors the D register and I relays on a word-by-word basis.

● Function

Reads the information of the registers that have been specified in advance by the WRS command.

• Before executing this command, the WRS command must always be executed to specify which registers are to be monitored. If no register has been specified, error code 06 is returned. This error also occurs if the power supply is turned off.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes the checksum function. When performing

communication without the checksum, do not include the 2-byte checksum element in the command.

● Command/Response (for normal operation)

Number of

Bytes

Command

element

STX2Address

number

(ADR)

CPU

number

WRM

Checksum1ETX1CR

Number of

Bytes

Response

element

STX2Address

number

(ADR)

CPU

number

dddd14dddd2

… …

ddddn

Checksum1ETX1CR

The response is returned in a 4-digit character string (0000 to FFFF) in a hexadecimal pattern.

ddddn: Read data of the number of words specified by the WRS command ddddn = character string in a hexadecimal pattern n = 1 to 32

● Example: Monitoring the measured input value of a UT350L controller with address number 01

The following command monitors the measured input value (D0003) at address number 01. (This command reads the status of the register specified by the WRS command.)

[Command] STX$+ “01010WRME8” +ETX$+CR$

CPU number: 01

The measured input value 200 (00C8 (HEX)) is returned in response to the command above.

[Response] STX$+ “0101OK00C837” +ETX$+CR$

Measured input value: 200

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

■

INF Reads the model, version, and revision information.

● Function

Reads the model code, version number , and revision number of the UT350L controller.

• For the format of response in the event of failure, see subsection 3.1.2.

● Command/Response (for normal operation)

3-20

Number of

Bytes

Command

element

Number of

Bytes

Response

element

Response (continued)

(Note 5)

Note 1: Model name and options of UT350L Controller

● Model code of UT350L LC350

Note 2: Version and revision numbers

STX2Address

0000

(Note 6)

number

(ADR)

number

(ADR)

Checksum1ETX1CR

CPU

number

CPU

number

-0

Response

time:

INF16

Model code:

LC350-0

(Note 1)

0: No option 1: With communication

revision numbers

Checksum1ETX1CR

Version and

(Note 3)

(Note 2)

0001

(Note 4)

V01. R00

Space (blank) Revision number Version number

Note 3:Valid in Non-user-specifiable mode.

* The value in this field is the first read register number, which is “0001” for all models.

Note 4:Valid in Non-user-specifiable mode.

* The value in this field is the number of registers read in Non-user-specifiable mode: “0008” for UT350L.

Note 5:Valid in Non-user-specifiable mode.

* The value in this field is the first write register number: “0001” for UT350L.

Note 6:Valid in Non-user-specifiable mode.

* The value in this field is the number of registers written in Non-user-specifiable mode, which is “0000” for all models.

*: One of the convenient modes used when communicating with FA-M3 with UT-link module. (See section 3.2.)

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

3.2.4 Response Error Codes

4. Ladder Communication

4.1 Overview

By using ladder communication, you can easily perform communication between a PLC (sequencer) and a UT350L controller . This kind of communication allows for the reading/ writing of D registers (internal registers of UT350L controller).

In ladder communication, a PLC identifies each instrument by its station number, which ranges from 1 to 99.

PLC (sequencer)

MAX 1200 m; the maximum number of slave units: 31

4-1

Figure 4.1 Connecting with Ladder Communication

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

4.1.1 Configuration of Commands

Commands sent from a PLC consist of the following elements.

4-2

Number of

Bytes

Number of

BCD digits

Element

Station number

(1) (2) (3) (4) (5) (6)

CPU

number

Parameter

number

1 01

11 1

R/W

+/–

(7) (8)

Read/write data

(1) Station Number (01 to 99)

The station number is used by the PLC to identify which instrument to communicate with. (ID number of UT350L controller)

(2) CPU Number

This number is fixed to 01.

(3) Parameter number

For D registers, 4-digit BCD data of a D register number with its leading character “D” removed.

(4) 0

(9)

This is fixed to 0.

(5) 0

This is fixed to 0.

(6) R/W

0: Read 1: Write

(7) +/-

0: Positive data (+) 1: Negative data (-)

(8) Read/write data

For read operation, the number of data items to be read. (64 at maximum) For write operation, setting data with a 4-digit BCD value excluding the decimal point.

(9) CR, LF

These control codes mark the end of a command. The character codes for CR and LF are CHR$(13) and CHR$(10), respectively .

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

● Data Forms of Commands

The table below shows the data forms of D registers.

Table 4.1 Data Forms

4-3

Data type

PV high and low limits, target setpoints, and others

Bias, deviation alarms, and others

Limit control types, alarm types, and others

* Parameter list of UT350L controller User’s Manual for information about data form.

Measuring range (EU) data

Measuring range span (EUS) data

Seconds, absolute values, and data without unit*

Data content

Numeric data not including the decimal point

Absolute value not including the decimal point

Data form

● Command Format for Communication

Example: When setting the target setpoint 50.00 to a UT350L controller , the PLC sends the value 5000 as command data without the decimal point (this is also true for both settings

5.000 or 500.0).

Data to be sent from the PLC: 5000

Command data: 5000

UT350L controller side

Target setpoint: 50.00

Response data from a UT350L controller: 5000

* The position of the decimal point for 5000 is determined by the DP (decimal point position) parameter of the UT350L controller.

4.1.2 Configuration of Response

Response from a UT350L controller with respect to a command sent from the PLC consists of the elements shown below.

Number of

Bytes

Number of BCD digits

Element

Station number

CPU

number

Parameter

number

the length of this part varies: 64 data items at maximum.

11 1

1 01

When responding to a data read command,

R/W

+/–

Read/write data

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4.2 Communication with PLC

With ladder communication you cannot specify D registers (internal registers of UT350L controller) by using their numbers as is. Set register numbers as shown below.

• D register: 4-digit BCD value of the register number (with “D” removed)

PLCs that can communicate with UT350L controllers are those capable of using the ladder communication protocol.

PLCs that can be connected to a UT350L controller are listed below .

Table 4.2 List of PLCs that can be connected

4-4

Supplier

Yokogawa Electric Corporation

Mitsubishi Electric Corporation, or others

Note: For more information about the PLCs listed above, contact the supplier.

FA500 FA-M3 MELSEC-A series and

others PLCs that can communicate

in handshaking mode.

Product

With communication module (RZ91-ON) With communication module (F3RZ91-ON) With computer link unit

With computer link unit

Requirement

For details, see the instruction manual of the PCL to be connected.

Remarks

(Note)

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

4.2.1 Reading Data

Shown below are the configurations of commands and responses when data in a UT350L controller is read by the PLC.

● Commands

4-5

Number of

bytes

Number of

BCD digits

Element

Station number

● Responses

Number of

bytes

Number of

BCD digits

Element

...

Station number

1 01

dddd2

CPU

number

CPU

number

Parameter

number

Parameter

number

(first data)

+/–

1 01

111

1 01

Number of data items to read (n)

dddd1

1 01 01

+/–

Second dataData of the parameter number

+/–

ddddn

nth data

● Example:

Reading a measured input value of a UT350L controller with station number 01

The following command reads the measured input value (D0003) at station number 01.

[Command] “01010003000000010D0A”

In response to the command above, the measured input value “200” is returned.

[Response] “01010003000002000D0A”

“0200” has been returned.

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4.2.2 Writing Data

Shown below are the configurations of commands and responses when data is written to a UT350L controller from the PLC.

● Commands

4-6

Number of

bytes

Number of

BCD digits

Element

Station number

CPU

number

Parameter

number

111

1 01

+/–

dddd

● Responses

Number of

bytes

Number of

BCD digits

Element

● Example: W riting “200” to the target setpoint 1 value of a UT350L controller with station number 01.

The following command writes “200” to the target setpoint 1 (D0301) at station number 01.

[Command] “01010301001002000D0A”

In response to the command above, the following response is returned. (Target setpoint 1 value is 200.)

Station number

CPU

number

Parameter

number

111

101

+/–

dddd

[Response] “01010301001002000D0A”

“0200” has been returned.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

4.2.3 Response Error Codes

The PLC may receive the following responses in the event of error .

Table 4.4 Response in the Event of Error

Error condition Data sent from PLC Data PLC receives

A non-existing parameter number was sent.

Characters other than BCD codes were used in an element other than a station number.

An LF code (0A) was used in an element other than a station number.

Specified station number does not match any of the controllers connected.

The write data was outside the range.

Wrong command length. (Command length is 10 bytes including CR and LF codes.)

A timeout occurred when sending data. (Timeout: 5 seconds)

Send buffer overflowed. (The buffer capacity is 199 bytes.)

0101 0000 0000 0001 CRLF “0000” is the wrong parameter number.

0101 0123 0000 000B CRLF 0101 0123 000B 0000 CRLF 0101 0123 0B00 0000 CRLF 0101 012B 0000 0000 CRLF

0101 0123 0000 000A CRLF 0101 0123 000A 0000 CRLF 0101 0123 0A00 0000 CRLF 0101 010A 0000 0000 CRLF

0103 0123 0000 0000 CRLF

0001 0123 0000 0000 CRLF 3301 0123 0000 0000 CRLF

0101 0123 0011 9999 CRLF

“9999” is the data outside the range.

0101 0123 0000 00 CRLF 0101 0123 00 0000 CRLF 0101 0 0000 0000 CRLF

0101 0000 0000 FFFF CRLF “FFFF” is returned.

0101 FFFF FFFF FFFF CRLF

No response

0101 0123 0011 0050 CRLF “0050” is the current setting of the parameter.

No response

4-7

A framing error or a parity error occurred.

No response

NOTE

If you try to read data of a parameter number that is not in the D register table, or that corresponds to a vacant cell in that table, no error occurs and 0 is returned.

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4.3 Communication with MELSEC

By way of ladder communication, a UT350L controller can exchange data, via its internal registers, with PLCs of suppliers other than Yokogawa. Sections 4.2 and 4.3 explain how to implement ladder communication with a MELSEC-A Series instrument (product of Mitsubishi Electric Corp.), which is often used in ladder communication.

Example

● System configuration:

4-8

MELSEC-A Series

Slot No.

Address No. 1 2 3

DI unit

Computer

link unit

RS-485 communication

UT350L controller

Computer link unit used at MELSEC-A: Use either (1) or (2) below. (1) A1SJ71UC24-R4 (2) A1SJ71C24-R4

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

4.3.1 Preparing for Communication

Provide wiring and set communication specifications.

4.3.2 Wiring

Connect the computer link unit of MELSEC-A to the UT350L controller’s communication terminals.

4-9

Communication

terminals of

MELSEC-A

SDA(+) SDB(-) RDA(+) RDB(-) SG

Shield

JIS Class 3 grounding (grounding resistance

of 100Ω or less)

The terminating resistor ratings are 220 W, 1/4W for UT350L controllers and 330 W, 1/4W for MELSEC-A instruments. The largest terminating resistor which is 330 W , 1/4W, should be provided.

Terminating resistor

330Ω1/4W

Communication terminals

of GREEN Series (1)

SDB(+) SDA(-) RDB(+) RDA(-)

23 24 25 26

JIS Class 3 grounding (grounding resistance

of 100Ω or less)

Communication terminals

of GREEN Series (2)

SDB(+) SDA(-) RDB(+) RDA(-)

23 24 25 26

JIS Class 3 grounding (grounding resistance

of 100Ω or less)

Communication terminals

of GREEN Series (3)

SDB(+) SDA(-) RDB(+) RDA(-)

23 24 25 26 27

Terminating resistor

330Ω1/4W

IM 05D01D21-10E

2nd Edition: Jul. 30, 2004-00

4.3.3 Setting Communication Specifications

After wiring is finished, set the same communication specifications at both the UT350L and MELSEC-A ’s computer link unit.

● Communication settings of UT350L

Communication settings are made to the software. Call up the setup parameters under the R485 menu, and set them up.

Code Parameter name Setting Remarks

PSL BPS PRI STP DLN RP.T

Protocol selection Communication rate Parity Stop bit Data length Minimum response time

2 (ladder communication)

4 (9600) 1 (EVEN) 1 8 0

For the operation procedure, see the User’s Manual of each UT350L controller .

Must be set to 2 to perform ladder communication. 0 : 600, 1 : 1200, 2 : 2400, 3 : 4800, 4 : 9600 (bps) 0 : NONE, 1 : EVEN, 2 : ODD 1, 2 7, 8 0 to 10 (x10 ms)

4-10

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

● Transmission settings of MELSEC-A

Set the switches of the computer link unit as shown below in steps (1) to (3).

MELSEC-A

sequencer

(1) Mode switch

MODE

Computer link

module

3 1

Communication

setting switches

Set to “4.” Mode 4 sets the following.

Communication rate: 9600 bps Parity: even Stop bit: 1 Data length: 1

(1) Mode switch (2) Transmission spec. switches (3) Station number switches

MODE Description

0 to 3

9 to E

Disabled Handshaking mode

Format-4 protocol mode Disabled MELSEC test mode

4-11

(2) Transmission specification switches ( : Not used for communication with a UT350L controller.)

01 04 05 12

is ON.

Multi-link

Disabled

19200

OFF

ON ON

7 bits No Odd 1 bit No

Disabled

ON ON ON

Switch

No.

01 02 03 04

05 06 07

08 09 10 11 12

0N.

Item

Not used. Link selection Not used. Write in RUN mode Communication rate (bps)

300 OFF OFF OFF

Data bit length Parity bit Parity bit type Stop bit selection Sum check

600

ON OFF OFF

2400 OFF

OFF

Setting

ON OFF

Computer link

Enabled

4800

OFF OFF

8 bits Yes Even 2 bits Yes

9800

OFF

(3) Station number switches

x10: Sets the 10th digit.

x1: Sets the 1st digit.

x10: Set to “0.” x1: Set to “0.”

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5. Functions and Use of D Registers

5.1 Overview

This section explains the functions and use of D registers. D registers store parameter data, flag data and process data of the UT350L controller. Y ou

can readily use these internal data items by reading from or writing to the D registers. Y ou can use D registers to perform:

● Centralized control using a host device

● Data exchange by reading/writing data from/to a host device

5.2 Interpretation of D Register T ables

This section explains how to read the D Register Map tables in this chapter . The numbers listed in the leftmost column are D register numbers ((1) below). Each register code name in the D Register Map tables represents a specific process data item, operating parameter, setup parameter or other data items such as a flag. For details on the operating parameters and setup parameters, see the user’s manual of UT350L.

5-1

D-Reg No.

D0001

(1) D register number

Name of D Register Map

ADERROR

R/W

Permission of read/write by communication

An asterisk (*) in this column indicates that the number of writing actions is limited to 100,000.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

5.3 Classification of D Registers

■ Classification of D Register Map T ables

The table below outlines how the D registers are classified by their numbers in the D Register Map tables.

Table 5.1 Classification of D Registers

D0001 to D0049 D0050 to D0100

Process data area (Note 1) User area (Note 2),

represented by shaded cells in the table

Data displayed for operation

PV, SP, and others If a graphic panel is used, this area is

used for communication with the graphic panel.

5-2

Section 5.4 Section 5.4

D0101 to D0230 D0231 to D0256

D0257 to D0900 D0901 to D0903 D0904 to D1253

Note 1: Data for process values, operating parameters and setup parameters are stored in the types (EU, EUS, %, or ABS without the decimal

point) indicated in the Operating Parameter Lists and Setup Parameter Lists of the user’s manual of UT350L. The OFF and ON states are represented by 0 and 1, respectively. D registers D0001 to D0049 are read-only.

Note 2: When communicating with a graphic panel, do not write to or read from this area (D0050 to D0100) because this area is reserved for 16-

bit register data used by graphic panels.

[See Also] Section 5.4, Process Data and User Area.

Cannot be used. Operating parameters

(Note 1)

Setup parameters (Note 1)

SP and Alarm setpoint parameters

Cannot be used. Cannot be used. PV input, alarm type, retransmission

output, and communication parameters

SP, A1, A2, BS, FL, H

IN, AL, HY, PSL, etc.

Section 5.5 Section 5.6

Section 5.7 Section 5.8

NOTE

It is prohibited to read/write data by communication from/to the registers of blank cells in the register map tables. If you attempt to do so, the UT350L may not operate properly.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

5.4 Process Data and User Area

Area for process data

D-Reg No. Register name R/W

D0001 ADERROR R D0051 R/W D0002 ERROR R D0052 R/W D0003 PV R D0053 R/W D0004 CSP R D0054 R/W D0005 R D0055 R/W D0006 R D0056 R/W D0007 R D0057 R/W D0008 MOD R D0058 R/W D0009 TIME R D0059 R/W D0010 MAX/MIN R D0060 R/W D0011 ALM R D0061 R/W D0012 D0062 R/W D0013 D0063 R/W D0014 D0064 R/W D0015 D0065 R/W D0016 D0066 R/W D0017 D0067 R/W D0018 D0068 R/W D0019 D0069 R/W D0020 D0070 R/W D0021 D0071 R/W D0022 D0072 R/W D0023 D0073 R/W D0024 D0074 R/W D0025 D0075 R/W D0026 D0076 R/W D0027 D0077 R/W D0028 D0078 R/W D0029 D0079 R/W D0030 D0080 R/W D0031 D0081 R/W D0032 D0082 R/W D0033 D0083 R/W D0034 D0084 R/W D0035 PARAERR R D0085 R/W D0036 D0086 R/W D0037 D0087 R/W D0038 D0088 R/W D0039 D0089 R/W D0040 D0090 R/W D0041 D0091 R/W D0042 D0092 R/W D0043 D0093 R/W D0044 D0094 R/W D0045 D0095 R/W D0046 D0096 R/W D0047 D0097 R/W D0048 D0098 R/W D0049 D0099 R/W D0050 R/W D0100 R/W

Shaded area : User area (You cannot use these registers when a graphic panel is used.)

D-Reg No. Register name R/W

5-3

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

5.4.1 Process Data Area (Read-only)

Some of the registers in this area (D0001 to D0049, read-only) are designed to represent two or more events, such as errors and statuses, using combinations of bits within the register. If any of the events shown in the following tables occur, the corresponding bit is set to 1. The bit remains 0 if the event does not occur . Note that bits with blank fields in the tables are not in use.

● Bit Configuration of D0001: ADERROR (Input Error)

Bit Code Event

0 ADERR Input A/D converter error 1 to 15

● Bit Configuration of D0002: ERROR (PV Error)

Bit Code Event

0 1 PVBO PV burnout error 2 RJCERR PV RJC error 3 4 PV+over PV over-scale 5 PV-over PV under-scale 6 to 15

5-4

● D0003: PV (Measured input value)

● D0004: CSP (Current target setpoint [SP])

● Bit Configuration of D0008: MOD (Operation mode)

Bit Code Event

0 1 EXD 1:EXCEED 2 OUT Output Relay; 1:on, 0:off 3 to 15

● Bit Configuration of D0011: ALM (Alarm Status)

Bit Code Event

0 ALM1 ‘1’ when alarm 1 is ON; ‘0’ when OFF 1 ALM2 ‘1’ when alarm 2 is ON; ‘0’ when OFF 2 to 15

[See Also]User’s Manual of UT350L

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

● Bit Configuration of D0035: P ARAERR (Error in calibration values and

parameters)

Bit Code Event

0 CALB.E Calibration value error 1 to 5 6 SETUP Setup parameter error 7 8 PARA.E Operation parameter error 9 to 11 12 EEP.E EEPROM error 13 14 SYSTEM.E System data error 15

5.4.2 User Area

D0050 to D0100 User area

Users can read/write data from/to the registers in this area. However, if a graphic panel is used in the system, users cannot use this area because it is reserved for communication with the graphic panel.

5-5

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

5.5 Alarm Setpoint, Bias, and Filter Parameters

Area for Alarm Setpoint, Bias, and Filter Parameters

D-Reg No. Register name R/W

D0201 D0251 D0202 D0252 D0203 D0253 D0204 D0254 D0205 D0255 D0206 D0256 H *R/W D0207 D0257 D0208 D0258 D0209 D0259 D0210 D0260 D0211 D0261 D0212 D0262 D0213 D0263 D0214 D0264 D0215 D0265 D0216 D0266 D0217 D0267 D0218 D0268 D0219 D0269 D0220 D0270 D0221 D0271 D0222 D0272 D0223 D0273 D0224 D0274 D0225 D0275 D0226 D0276 D0227 D0277 D0228 D0278 D0229 D0279 D0230 D0280 D0231 A1 *R/W D0281 D0232 A2 *R/W D0282 D0233 D0283 D0234 D0284 D0235 D0285 D0236 D0286 D0237 D0287 D0238 D0288 D0239 D0289 D0240 D0290 D0241 D0291 D0242 D0292 D0243 BS *R/W D0293 D0244 FL *R/W D0294 D0245 D0295 D0246 D0296 D0247 D0297 D0248 D0298 D0249 D0299 D0250 D0300

D-Reg No. Register name R/W

5-6

An asterisk (*) indicates that the number of writing actions is limited to 100,000.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

5.5.1 Data Area for Alarm Setpoint, Bias, and Filter Parameters

D0231 to D0232 D0243 to D0244

Alarm setpoint parameters Computation parameters

A1 to A2: Alarm setpoints for alarm 1 to 2 BS: PV bias

FL: PV filter

For details on the parameters, see the User’s Manual of UT350L

5-7

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

5.6 SP Parameter

Area for SP Parameter

D-Reg No. Register name R/W

D0301 SP *R/W D0351 D0302 D0352 D0303 D0353 D0304 D0354 D0305 D0355 D0306 D0356 D0307 D0357 D0308 D0358 D0309 D0359 D0310 D0360 D0311 D0361 D0312 D0362 D0313 D0363 D0314 D0364 D0315 D0365 D0316 D0366 D0317 D0367 D0318 D0368 D0319 D0369 D0320 D0370 D0321 D0371 D0322 D0372 D0323 D0373 D0324 D0374 D0325 D0375 D0326 D0376 D0327 D0377 D0328 D0378 D0329 D0379 D0330 D0380 D0331 D0381 D0332 D0382 D0333 D0383 D0334 D0384 D0335 D0385 D0336 D0386 D0337 D0387 D0338 D0388 D0339 D0389 D0340 D0390 D0341 D0391 D0342 D0392 D0343 D0393 D0344 D0394 D0345 D0395 D0346 D0396 D0347 D0397 D0348 D0398 D0349 D0399 D0350 D0400

D-Reg No. Register name R/W

5-8

An asterisk (*) indicates that the number of writing actions is limited to 100,000.

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5.6.1 Data Area for SP Parameter

D0301 Operating parameters

SP: Target setpoint

5-9

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5.7 Alarm T ype, Limit Control Type Selection, and Retransmission Parameters

Area for Alarm Type and Limit Control Type Selection Parameters

D-Reg No. Register name R/W

D0901 D0951 D0902 D0952 D0903 D0953 D0904 TMU *R/W D0954 D0905 D0955 D0906 D0956 D0907 D0957 D0908 D0958 D0909 D0959 D0910 D0960 D0911 D0961 D0912 D0962 D0913 D0963 D0914 D0964 D0915 AL1 *R/W D0965 D0916 AL2 *R/W D0966 D0917 D0967 D0918 D0968 D0919 HY1 *R/W D0969 D0920 HY2 *R/W D0970 D0921 D0971 D0922 D0972 D0923 D0973 D0924 D0974 D0925 D0975 D0926 D0976 D0927 D0977 D0928 D0978 D0929 D0979 D0930 R.MD *R/W D0980 D0931 D0981 D0932 DIS *R/W D0982 D0933 HI.LO *R/W D0983 D0934 OP.SL *R/W D0984 D0935 D0985 D0936 D0986 D0937 D0987 D0938 D0988 D0939 D0989 D0940 D0990 D0941 D0991 D0942 D0992 D0943 D0993 D0944 D0994 D0945 D0995 D0946 D0996 D0947 D0997 D0948 D0998 D0949 D0999 D0950 D1000

D-Reg No. Register name R/W

5-10

An asterisk (*) indicates that the number of writing actions is limited to 100,000.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

Area for Retransmission Parameters

D-Reg No. Register name R/W

D1001 D1051 D1002 D1052 D1003 D1053 D1004 D1054 D1005 D1055 D1006 D1056 D1007 D1057 D1008 D1058 D1009 D1059 D1010 D1060 D1011 D1061 D1012 D1062 D1013 RET *R/W D1063 D1014 RTH *R/W D1064 D1015 RTL *R/W D1065 D1016 D1066 D1017 D1067 D1018 D1068 D1019 D1069 D1020 D1070 D1021 D1071 D1022 D1072 D1023 D1073 D1024 D1074 D1025 D1075 D1026 D1076 D1027 D1077 D1028 D1078 D1029 D1079 D1030 D1080 D1031 D1081 D1032 D1082 D1033 D1083 D1034 D1084 D1035 D1085 D1036 LOCK *R/W D1086 D1037 D1087 D1038 D1088 D1039 D1089 D1040 D1090 D1041 D1091 D1042 D1092 D1043 D1093 D1044 D1094 D1045 D1095 D1046 D1096 D1047 D1097 D1048 D1098 D1049 D1099 D1050 D1100

D-Reg No. Register name R/W

5-11

An asterisk (*) indicates that the number of writing actions is limited to 100,000.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

5.7.1 Data Area for Alarm Type, Hysteresis, Limit Control T ype Selection Parameters

D0904 D0915 to D0916

Time unit for duration time Alarm setting parameters

TMU AL1 to AL2

For alarm types, see the User’s Manual of UT350L.

5-12

D0919 to D0920 D0930 D0932

D0933 D0934

Alarm hysteresis Restart mode

The way of confirmation Limit control type selection

Operating display selection

HY1 to HY2 R.MD

DIS HI.LO

OP.SL

0.0 to 100.0% of measured input range span

For details on the parameters, see the User’s Manual of UT350L.

5.7.2 Data Area for Retransmission and Key-lock Parameters

D1013 to D1015

D1036

Retransmission output setting parameters

Key-lock setting parameters

RET to RTL

LOCK

For details on the parameters, see the User’s Manual of UT350L.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

5.8 PV Input, Control Output, and Communication Parameters

Area for PV Input and Communication Parameters

D-Reg No. Register name R/W

D1201 IN *R/W D1251 DLN R D1202 UNI *R/W D1252 ADR R D1203 D1253 RP.T R D1204 RH *R/W D1254 D1205 RL *R/W D1255 D1206 SDP *R/W D1256 D1207 SH *R/W D1257 D1208 SL *R/W D1258 D1209 BSL *R/W D1259 D1210 RJC *R/W D1260 D1211 D1261 D1212 D1262 D1213 D1263 D1214 D1264 D1215 D1265 D1216 D1266 D1217 D1267 D1218 D1268 D1219 D1269 D1220 D1270 D1221 D1271 D1222 D1272 D1223 D1273 D1224 D1274 D1225 D1275 D1226 D1276 D1227 D1277 D1228 D1278 D1229 D1279 D1230 D1280 D1231 D1281 D1232 D1282 D1233 D1283 D1234 D1284 D1235 D1285 D1236 D1286 D1237 D1287 D1238 D1288 D1239 D1289 D1240 D1290 D1241 D1291 D1242 D1292 D1243 D1293 D1244 D1294 D1245 D1295 D1246 D1296 D1247 PSL R D1297 D1248 BPS R D1298 D1249 PRI R D1299 D1250 STP R D1300

D-Reg No. Register name R/W

5-13

An asterisk (*) indicates that the number of writing actions is limited to 100,000.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

5.8.1 Data Area for PV Input, and Communication Parameters

D1201 to D1210

D1247 to D1253

PV input parameters

RS-485 communication parameters

IN to RJC

PSL to RP.T

For details on the parameters, see the User’s Manual of UT350L.

5-14

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

6. Functions and Use of I Relays

6.1 Overview

This chapter explains the functions and use of I relays. I relays contain status information of errors, operation, and alarms. Contents of I relays can

be read only by means of communication using a host device. (Note that the I relays have the same information as the D registers but with I relays some of the information is readonly.)

Y ou can use I relays to perform:

● Centralized monitoring through a display created with a host device.

6.2 Status I Relays

The configuration of status I relay area is as shown below .

Table 6.1 Classification of I Relays

6-1

I relay No. Category Description Remarks

1 to 16 17 to 32 33 to 48 49 to 64 65 66 and 67 68 to 96 99 to 720 721 to 784

Status

Do not use. User-definable area

Input error (same as D0001) PV error (same as D0002) Do not use. Error in calibration values or parameters (same as D0035) Do not use. EXCEEDED flag and OUT lamp flag Alarm flag

NOTE

• When specifying an I relay number for communication, begin the number with the character “I.” For example, set I0019 to specify the RJCERR relay (I relay No.: 0019).

• In the area for I relays 1 to 720, it is prohibited to write data to I relays with blank cells in I relay map tables. If you attempt to do so, the UT350L may not operate properly.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

Status Area

No. I relay name

1 ADERROR 33 65 97 ALM1 129 161 23466EXD 98 ALM2 130 162 33567OUT 99 131 163 4 36 68 100 132 164 5 37 69 101 133 165 6 38 70 102 134 166 7 39 71 103 135 167 8 40 72 104 136 168 9 41 73 105 137 169 10 42 74 106 138 170 11 43 75 107 139 171 12 44 76 108 140 172 13 45 77 109 141 173 14 46 78 110 142 174 15 47 79 111 143 175 16 48 80 112 144 176 17 49 CALB.E 81 113 145 177 18 PVBO 50 82 114 146 178 19 RJCERR 51 83 115 147 179 20 52 84 116 148 180 21 PV+over 53 85 117 149 181 22 PV-over 54 86 118 150 182 23 55 SETUP 87 119 151 183 24 56 88 120 152 184 25 57 PARA.E 89 121 153 185 26 58 90 122 154 186 27 59 91 123 155 187 28 60 92 124 156 188 29 61 EEP.E 93 125 157 189 30 62 94 126 158 190 31 63 SYSTEM.E 95 127 159 191 32 64 96 128 160 192

No. I relay name No. I relay name No. I relay name No. I relay name No. I relay name

6-2

6.3 User Area

I relay No. Category Description

721 to 784 User area

You can read/write data from/to the area for I relays 721 to 784 via communication. That is, you can use the area freely without affecting the control function of UT350L.

IM 05D01D21-10E 2nd Edition: Jul. 30, 2004-00

Revision Information

● Title : Model UT350L Limit Controller Communication Funcitons User’s Manual

● Manual No. : IM 05D01D21-10E

May 2001/1st Edition

Newly published

Jul 2004/2nd Edition

Change of the company name

Written by Yokogawa Electric Corporation

Published by Yokogawa Electric Corporation

2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, JAPAN

IM 05E01B02-41E 2nd Edition: Jul. 30, 2004-00

Blank Page

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Yokogawa UT350L Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

CONTENTS

1. Communications Overview

1.1 Interface Specifications

2. Setup

2.1 Setup Procedure

2.2 Wiring for Communication

2.2.1 Wiring to a Personal Computer

2.2.2 Wiring to a PLC (Sequencer) or Graphic Panel

2.3 Notes on Setting Communication Parameters

2.3.1 Procedure to Set Communication Parameters

2.3.2 Description of Communication Parameters

3. PC Link Communication

3.1 Overview

3.1.1 Configuration of Commands

3.1.2 Configuration of Response

3.2 Communication with Host Device

3.2.1 List of Commands

3.2.2 Specifying Broadcast

3.2.3 Commands

3.2.4 Response Error Codes

4. Ladder Communication

4.1 Overview

4.1.1 Configuration of Commands

4.1.2 Configuration of Response

4.2 Communication with PLC

4.2.1 Reading Data

4.2.2 Writing Data

4.2.3 Response Error Codes

4.3 Communication with MELSEC

4.3.1 Preparing for Communication

4.3.2 Wiring

4.3.3 Setting Communication Specifications

5. Functions and Use of D Registers

5.1 Overview

5.2 Interpretation of D Register T ables

5.3 Classification of D Registers

5.4 Process Data and User Area

5.4.1 Process Data Area (Read-only)

5.4.2 User Area

5.5 Alarm Setpoint, Bias, and Filter Parameters

5.5.1 Data Area for Alarm Setpoint, Bias, and Filter Parameters

5.6 SP Parameter

5.6.1 Data Area for SP Parameter

5.7 Alarm T ype, Limit Control Type Selection, and Retransmission Parameters

5.7.1 Data Area for Alarm Type, Hysteresis, Limit Control T ype Selection Parameters

5.7.2 Data Area for Retransmission and Key-lock Parameters

5.8 PV Input, Control Output, and Communication Parameters

5.8.1 Data Area for PV Input, and Communication Parameters

6. Functions and Use of I Relays

6.1 Overview

6.2 Status I Relays

6.3 User Area

Revision Information