Omron ZS Operating manual

CompoWay/F Communication

Cat. No. Z231-E1-02

Smart Sensors

ZS Series

Command Reference

Introduction

Thank you for purchasing the ZS Series. This manual provides information regarding

operations and input/output formats for the communication between ZS Series controllers

and external devices using the Omron proprietary protocol, CompoWay/F.

This manual provides information for the following models and versions.

Model Firmware Version

ZS-LDC v2.000 or later

ZS-HLDC v1.000 or later

ZS-MDC v2.000 or later

ZS-DSU v2.000 or later

* Different firmware versions may cause communication errors, unintended setting

overwrite, and damages on the controller. Please make sure to use the controller with

the correct software version.

If your software version is not listed in the table above, please update the software

using the SmartMonitorZS firmware update software, such as WarpEngineZS, to

match the software version.

When using the ZS Series, be sure to observe the following:

- The ZS Series must be operated by personnel knowledgeable in electrical engineering.

- To ensure correct use, please read this manual thoroughly to deepen your

understanding of the product.

- Please keep this manual in a safe place so that it can be referred to whenever

necessary.

ZS Series

CompoWay/F Communication Command Reference

Contents

Contents 1

Section 1 About Communication Commands 1-1

How Communication Works 1-2

Setting the Communication Specifications 1-3

Command Formats 1-4

Response Formats 1-6

Examples of Abnormal End 1-8

Section 2 Details of Commands 2-1

About General Information of Communication Commands 2-2

Reading Parameter Areas 2-3

List of Parameter Area Reading Commands 2-3

Commands and Responses 2-4

Writing Parameter Areas 2-6

List of Parameter Area Writing Commands 2-6

Commands and Responses 2-7

Reading Variable Areas 2-9

List of Variable Area Reading Commands 2-9

Commands and Responses 2-9

Reading Controller Information 2-11

Operation Instructions 2-12

List of Operation Instruction Commands 2-12

Commands and Responses 2-12

Section 3 Unit No. and Parameter No. 3-1

Measurement Result Obtaining Command 3-2

Setting Value Obtaining and Changing Command 3-4

Parameter List (ZS-LDC) 3-4

Parameter List (ZS-HLDC) 3-11

Parameter List (ZS-MDC) 3-18

Parameter List (ZS-DSU) 3-27

ZS Series

CompoWa

/F Communication Command Reference

Contents

Section 4 How to Obtain Flow Data 4-1

About Obtaining Flow Data 4-2

Setting Procedures for Data Obtaining Conditions 4-3

Setting Parameters 4-8

Buffer Size and Buffer Interval 4-8

Logging Data Type 4-8

Flow Data Response 4-11

Format 4-11

Composition of Response 4-11



1-1



Section 1

About Communication Commands

ZS Series

CompoWay/F Communication Command Reference

Section 1

About Communication Commands

How Communication Works 1-2

Setting the Communication Specifications 1-3

Command Formats 1-4

Response Formats 1-6

Examples of Abnormal End 1-8



1-2



Section 1

How Communication Works

ZS Series

CompoWay/F Communication Command Reference

Section 1 About Communication Commands

How Communication Works

ZS Series controllers have communication functions with external devices. Use this function to

read the data in ZS Series controllers from the host and to write the setting data.

Communication is achieved via the Command and Response Method based on the

CompoWay/F, which is Omron's proprietary communication protocol. Controllers perform

processing according to the command sent from the host, and then return the result to the host

which sent the command as a response.

Host ZS Series Controller (RUN mode)

Programmable Controller

Personal Computer

LDONZEROENABLE

Entering Commands Executing Commands

Controllers are in a

non-measurement state

when executing

commands.

Receives the results of the execution

of commands.

Outputs the result of the execution of

commands.

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1-3

ZS Series

CompoWay/F Communication Command Reference



Section 1

Setting the Communication Specifications

Section 1

About Communication Commands

Setting the Communication Specifications

Change the settings of the controller communication specifications for communicating with the

external device by CompoWay/F protocol.

Use USB cable or RS-232C cable to connect ZS Series controllers to external

devices.

For USB cable connection, install Smart Monitor ZS and USB driver beforehand. After

installing Smart Monitor ZS, USB ports are recognized as standard COM ports, and

communication is achieved as with the RS-232C. (Setting the communication

specifications including baud rate is not necessary.)

For details on how to connect cable, refer to the User's Manual for each controller.

1. Set the mode switch to "FUN"

2. Select [System] - [Communication] - [Mode] menu.

3. Select [CompoWay/F].

4. For RS-232C cable connection, select [System] - [Communication] -

[RS-232C] menu to set the appropriate communication

specifications for the external device.

5. Save the settings.



1-4 ZS Series

CompoWay/F Communication Command Reference



Section 1

Command Formats

Section 1 About Communication Commands

Command Formats

The command format of the communication commands is shown below.

In the following section, items described with "Hex" after numerical values (ex. 02Hex) indicate

hexadecimal numbers. Those described with " " or only with numeral values indicate ASCII

characters.

(Text)

STX NODE No. Subaddress SID Command text ETX BCC

02Hex

FIXED (x101) (x100) "00"

FIXED

"0"

FIXED MRC SRC 03Hex

FIXED

1 byte 2 bytes 2 bytes 1 byte 1 byte 1 byte

BCC calculating range

* In the example format, 1 byte = 1 ASCII character.

Elements Details

STX This is a code to indicate the first part of communication frames (02Hex).

Make sure to set the first byte to 02Hex.

When a controller receives STX while receiving a command, it receives the

command again starting from where it received STX.

NODE No. This is the Node No. for the identification of the destination.

* About Node No.

It refers to the connection group No. as seen from the host device (PLC). Not

only the ZS Series but other multiple devices are connected to the PLC. The

number assigned to devices connected to a PLC such as this is referred to as a

Node No.

Subaddress This should be fixed to "00."

SID (Service ID) This should be fixed to "0."

Command text This is the text part of the command.

"Section 2 – Details of Commands" describes these parts by command.

ETX This is a code to indicate the end of the text (03Hex).

BCC This is a block check character.

The exclusive OR (XOR) of values from Node No. to ETX per byte is BCC.



1-5

ZS Series

CompoWay/F Communication Command Reference



Section 1

Command Formats

Section 1

About Communication Commands

Example of BCC calculation

STX NODE No. Subaddress SID Command text ETX BCC

02Hex "0"

(30Hex )

"0"

(30Hex )

"00"

(3030Hex)

"0"

(30Hex )

"30053001"

(3330303533303031Hex) 03Hex 37Hex

Set the result of calculation, which is "37Hex," to BCC.

BCC = 30Hex + 30Hex + 30Hex + 30Hex + 30Hex + 33Hex +30Hex + 30Hex +35Hex + 33Hex +

30Hex +30Hex +31Hex +03Hex = 37Hex

"+" indicates the exclusive OR (XOR) operation.



1-6 ZS Series

CompoWay/F Communication Command Reference



Section 1

Response Formats

Section 1 About Communication Commands

Response Formats

The response format of the communication commands is shown below.

In the following section, items described with "Hex" after numerical values (ex. 02Hex) indicate

hexadecimal numbers. Those described with " " or only with numeral values indicate ASCII

characters.

STX NODE No. Subaddress End code Response text ETX BCC

02Hex

Fixed

(×101)

(×100)

"00"

Fixed

MRC SRC 03Hex

Fixed

1 byte 2 bytes 2 bytes 2 bytes 1 byte 1 byte

Elements Details

STX

NODE No.

Subaddress

Command Formats - page 1 - 4

End code Refer to the next page.

Response text This is the response text part of the command.

"Section 2 – Details of Commands" describes these parts by command.

ETX

BCC Command Formats - page 1 - 4

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