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.

1
ZS Series
CompoWay/F Communication Command Reference
Contents
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

2
ZS Series
CompoWa
y
/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

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1-1
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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

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1-2
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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
H
LDONZEROENABLE
P
L
H
LDONZEROENABLE
P
L
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
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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.

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1-4 ZS Series
CompoWay/F Communication Command Reference
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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.

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1-5
ZS Series
CompoWay/F Communication Command Reference
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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.
<Calculation>
BCC = 30Hex + 30Hex + 30Hex + 30Hex + 30Hex + 33Hex +30Hex + 30Hex +35Hex + 33Hex +
30Hex +30Hex +31Hex +03Hex = 37Hex
"+" indicates the exclusive OR (XOR) operation.

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1-6 ZS Series
CompoWay/F Communication Command Reference
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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