Omron ZFV-C Installationshandbuch

Smart Sensor

ZFV-C

CompoWay/F Communication

Command Reference

Cat. No. Z243-E1-01A

Introduction

Thank you for purchasing the ZFV-C.

This manual provides information regarding operations and input/output format that are

required for communication between ZFC-V controllers and external devices using the

OMRON proprietary communication protocol, Compoway/F.

When using the ZFV-C, be sure to observe the following:

• The ZFV-C 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.

ZFV-C

CompoWay/F Communication Command Reference

ÇÕÇ¹Ç?Ç ëÊ 1èÕ ëÊ 2 èÕ ëÊ 3èÕ ëÊ 4èÕ

Contents Section 1 Section 2 Section 3 ëÊ 6 èÕ ëÊ 7èÕ

Contents

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 Read 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 Controller Information 2-9

Operation Instructions 2-10

List of Operation Instruction Commands 2-10

Commands and Responses 2-10

Section 3 Unit Nos. and Parameter Nos. 3-1

Setting Value Acquisition/Change Commands 3-2

ZFV-C

CompoWay/F Communication Command Reference

Section 1 About Communication Commands

1-1

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 About Communication Commands

ZFV-C

CompoWay/F Communication Command Reference

Section 1

How Communication Works

ZFV-C controllers have a function for communicating with external devices. Use this

function to read the data in ZFV-C controllers from the host and to write the setting data.

Communication is achieved via the Command and Response Method based on

CompoWay/F, OMRON's proprietary communication protocol. Controllers execute

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

response to the host that sent the command.

Host

Programmable Controller

Personal Computer

The command is entered.

ZFV-C controller (RUN mode)

During command

execution,

the controller is in a

non-measurement

state.

The command is

executed.

The result of command

execution is received.

The execution result

is output.

1-3

ZFV-C

CompoWay/F Communication Command Reference

Section 1 About Communication Commands

Section 1

Setting the Communication Specifications

Change the settings of the controller communication specifications for communicating with

the external device by CompoWay/F protocol.

Use a USB cable or RS-232C cable to connect ZFV-C controllers to external devices.

For the USB cable connection, download and install the USB driver beforehand.

For the USB driver, please contact your OMRON representative.

1. Switch the controller to [MENU].

2. Select [System2] - [Communication] to set the appropriate communication

specifications for the external device.

3. Switch the controller to [RUN]. (This executes the save.)

1-4

Section 1 About Communication Commands

ZFV-C

CompoWay/F Communication Command Reference

Section 1

Command Formats

The command format of the communication commands is shown below.

In the following section, numerical values appended with "Hex" (e.g. 02Hex) indicate

hexadecimal numbers. Those annotated by " " or only numeral values indicate ASCII

characters.

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

BCC calculating range

STX

1 byte

Node No.

2 bytes

Subaddress

2 bytes

SID

1 byte

Command text ETX

1 byte

BCC

1 byte

(Text)

02Hex

fixed "00"

fixed "0"

fixed MRC SRC 03Hex

fixed

(x 101)(x 100)

Element Description

STX This code indicates the start of a communication frame (02Hex).

Be 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 identifying the destination. It should be fixed to "00."

* About node No.

This node No. indicates the connection group No. as seen from the host

device (PLC). Not only ZFV-C but also two or more devices can be

connected to the programmable controller. The No. 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 section of the command.

"Section 2 - Details of Commands" describes these sections by each individual

command.

ETX This code indicates the end of the text (03Hex).

BCC This is the block check character.

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

BCC.

1-5

ZFV-C

CompoWay/F Communication Command Reference

Section 1 About Communication Commands

Section 1

Command Formats

■Example of BCC calculation

STX Node No. Subaddress SID Command text ETX BCC

02Hex "00"

(3030Hex)

"0"

(30Hex) "0"

(30Hex) "30053001"

(3330303533303031Hex) 03Hex 37Hex

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

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

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

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

1-6

Section 1 About Communication Commands

ZFV-C

CompoWay/F Communication Command Reference

Section 1

Response Formats

The response format of the communication commands is shown below.

In the following section, numerical values appended with "Hex" (e.g. 02Hex) indicate

hexadecimal numbers. Those annotated by " " or only numeral values indicate ASCII

characters.

STX

1 byte

Node No.

2 bytes

Subaddress

2 bytes

End code

2 bytes

Response text ETX

1 byte

BCC

1 byte

02Hex

fixed "00"

fixed MRC SRC 03Hex

fixed

(x 101) (x 100)

Element Description

STX Command Format, page 1-4

Node No.

Subaddress

End code Refer to the next page.

Command text This is the response text section of the command.

"Section 2 - Details of Commands" describes these sections by each individual

command.

ETX Command Format, page 1-4

BCC

1-7

ZFV-C

CompoWay/F Communication Command Reference

Section 1 About Communication Commands

Section 1

Response Formats

End codes of responses are shown below.

An end code is returned after receiving one complete command frame addressed to the

node.

No response is made when ETX or BCC characters are missing from the command frame.

Noise may cause response errors or no response. Be sure to retry from the host.

It may take three seconds at longest from sending a command to receiving a response. If no

response is returned, be sure to send another command after waiting for at least three seconds.

End code Name Description

"00" Normal end Command execution ended successfully.

"0F" Command error The specified command could not be executed.

For details on non-execution, refer to the response code.

"10" Parity error A parity error occurred on one of the characters during command

reception.

"11" Framing error A framing error occurred on one of the characters during command

reception.

"12" Overrun error An overrun error occurred on one of the characters during command

reception.

"13" BCC error An illegal BCC was received.

"14" Format error • This response is returned when characters other than 0 to 9 or A to

F are used in command text sections. (except during echo back

tests)

• No SID and command text exist.

Or, no command text exists.

• Either MRC or SRC is missing in the command text.

"16" Subaddress error • The subaddress of the receive frame is illegal (not supported).

• No subaddress, SID, and command text exist.

• The subaddress is shorter than two characters, and no SID and

command texts exist.

"18" Frame length error The receive frame exceeds the specified (supported) number of

bytes.

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