欧姆龙PLC FINS通信协议详解及应用

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"欧姆龙FINS通信是用于欧姆龙PLC与上位机之间进行数据交换的一种通信协议，适用于欧姆龙的多种型号CPU，如CS1G/H-CPU、CJ1G/H-CPU等。FINS通信命令是实现这种通信的关键，它允许用户自定义程序来控制和监控PLC的状态。本资源可能是一份参考手册，详细介绍了FINS通信的相关命令和安全注意事项。" 在工业自动化领域，欧姆龙FINS（Factory Integrated Network System）通信协议是一个重要的组成部分，它使得欧姆龙的可编程逻辑控制器（PLC）能够与各种设备和上位机系统进行高效的数据交互。FINS协议基于TCP/IP、UDP或串行通信，支持多种网络结构，包括Ethernet、RS-485和RS-232。 **FINS通信协议概述：** FINS协议设计的目标是为了简化PLC与上位机或者PLC之间的通信流程，它提供了一套标准的通信命令集，允许用户编写自定义程序来实现对PLC的读写操作，如读取输入状态、设置输出状态、读取寄存器值、写入数据到寄存器等。FINS协议还支持多站通信，可以实现一对多或多对一的通信模式，适应了复杂工厂环境的需求。 **FINS通信命令：** FINS命令通常包括数据读取（RX）、数据写入（TX）、设备状态查询、网络配置等。在手册中，这些命令通常会有详细的语法和使用示例，帮助开发者理解如何正确构造和发送FINS命令。例如，"" 和 "" 可能分别对应不同的FINS命令代码，用于不同类型的通信操作。 **安全警告与预防措施：** 手册中提到了几种警示标识，包括"DANGER"、"WARNING"和"Caution"，这些都是为了提醒用户在进行FINS通信时必须遵循的安全规则。不遵守这些预防措施可能导致人员伤害或设备损坏。例如，"DANGER"标识提示用户可能存在立即导致死亡或严重伤害的危险情况；"WARNING"表示如果不避免，可能会造成死亡或重伤；"Caution"则警告用户可能会有轻伤或财产损失的风险。欧姆龙FINS通信协议是实现对欧姆龙PLC高效控制和监控的重要工具，而该参考手册则是开发者实施FINS通信时不可或缺的技术参考资料。通过深入理解和应用手册中的内容，可以确保系统的安全运行并优化自动化过程。

SECTION 1

Introduction

This section introduces the C-mode commands and FINS commands, and explains the relationship between them.

1-1 Overview of Communications Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 C-mode Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-3 FINS Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Overview of Communications Commands Section 1-1

1-1 Overview of Communications Commands

Communications Commands Addressed to CS/CJ-series PCs

A CS/CJ-series CPU Unit can receive the following communications com-

mands.

C-mode Commands C-mode commands are specialized Host Link communications commands.

They are issued by a host computer and sent to a CPU Unit. The devices that

can be connected for serial communications are the CPU Unit, a Serial Com-

munications Unit, and a Serial Communications Board.

FINS Commands FINS commands are message service communications commands. They do

not depend on a particular transmission path. They can be used for communi-

cations on various networks (Controller Link, Ethernet, etc.) and for serial

communications (Host Link). They can be issued from a CPU Unit, Special I/O

Unit, or host computer, and they can also be sent to any of these. The specific

commands that can be sent depend on the destination.

This manual explains commands sent to CS/CJ-series CPU Units, when the

commands are issued from a CPU Unit or a host computer connected by Host

Link.

Note When the source of the commands is a CPU Unit, the FINS commands are

sent by means of CMND(490)/SEND(090)/RECV(098). When the source is a

host computer, the FINS commands are issued using Host Link protocol.

1-2 C-mode Commands

The following table lists the C-mode (Host Link) commands. For details, refer

to SECTION 4 C-mode Commands.

Communications commands

C-mode commands via Host Link

FINS commands

Via CMND(490)/SEND(090)/RECV(098)

Via Host Link

Type Header

code

Name Function

I/O memory

reading

RR CIO AREA READ Reads the specified number of words beginning with

the designated CIO word.

RL LR AREA READ Reads the specified number of words beginning with

the designated LR word.

RH HR AREA READ Reads the specified number of words beginning with

the designated HR word.

RC TIMER/COUNTER PV READ Reads the specified number of words of the timer/

counter PV beginning with the designated word.

RG TIMER/COUNTER STATUS READ Reads the specified number of words of the timer/

counter status beginning with the designated word.

RD DM AREA READ Reads the specified number of words beginning with

the designated DM word.

RJ AR AREA READ Reads the specified number of words beginning with

the designated AR word.

RE EM AREA READ Reads the specified number of words beginning with

the designated EM word.

C-mode Commands Section 1-2

I/O memory

writing

WR CIO AREA WRITE Writes the specified data in word units beginning

with the designated CIO word.

WL LR AREA WRITE Writes the specified data in word units beginning

with the designated LR word.

WH HR AREA WRITE Writes the specified data in word units beginning

with the designated HR word.

WC TIMER/COUNTER PV WRITE Writes the specified timer/counter PV data in word

units beginning with the designated word.

WD DM AREA WRITE Writes the specified data in word units beginning

with the designated DM word.

WJ AR AREA WRITE Writes the specified data in word units beginning

with the designated AR word.

WE EM AREA WRITE Writes the specified data in word units beginning

with the designated EM word.

Timer/counter SV

reading

R# TIMER/COUNTER SV READ 1 Reads in four digits BCD the constant SV that is

written as an operand of the designated timer/

counter instruction.

R$ TIMER/COUNTER SV READ 2 Finds the specified timer/counter instruction, begin-

ning with the designated program address, and

reads the constant SV in four digits or the word in

which the SV is stored.

R% TIMER/COUNTER SV READ 3 Finds the specified timer/counter instruction, begin-

ning with the designated program address, and

reads the constant SV in four digits (BCD) or the

word in which the SV is stored.

Timer/counter SV

changing

W# TIMER/COUNTER SV CHANGE 1 Changes the SV of the specified timer/counter

instruction to a new constant SV.

W$ TIMER/COUNTER SV CHANGE 2 Finds the specified timer/counter instruction, begin-

ning with the designated program address in the

user program, and changes the constant SV in four

digits (BCD) or the word in which the SV is stored to

a new constant SV or storage word.

W% TIMER/COUNTER SV CHANGE 3 Finds the specified timer/counter instruction, begin-

ning with the designated program address in the

user program, and changes the constant SV in four

digits (BCD) or the word in which the SV is stored to

a new constant SV or storage word.

CPU Unit status MS STATUS READ Reads the CPU Unit’s operating conditions (operat-

ing mode, forced set/reset status, and fatal errors).

SC STATUS CHANGE Changes the CPU Unit’s operating mode.

MF ERROR READ Reads the CPU Unit’s error information (i.e., all fatal

or non-fatal errors currently in effect).

Forced

set/reset

KS FORCED SET Forcibly sets one designated bit.

KR FORCED RESET Forcibly resets one designated bit.

FK MULTIPLE FORCED SET/RESET Forcibly sets/resets/cancels multiple designated

bits.

KC FORCED SET/RESET CANCEL Cancels all forced set/reset status.

PC model code

reading

MM PC MODEL READ Reads the model code of the CPU Unit.

Testing TS TEST Returns, just as it is, a single block that was sent

from the host computer.

Type Header

code

Name Function

FINS Commands Section 1-3

1-3 FINS Commands

The following table lists the FINS commands. For details, refer to SECTION 5

FINS Commands.

Program area

accessing

RP PROGRAM READ Reads, in one batch, the contents of the CPU Unit’s

user program at the machine language (object)

level.

WP PROGRAM WRITE Writes into the CPU Unit’s user program area the

machine language (object) sent from the host com-

puter.

I/O table creation MI I/O TABLE CREATE Creates an I/O table with the contents of the actual

I/O configuration.

I/O memory area

registration and

reading

QQMR REGISTER I/O MEMORY Registers the I/O memory words or bits that are to

be read.

QQIR READ I/O MEMORY Reads the registered I/O memory words/bits all at

once.

Host Link commu-

nications

processing

XZ ABORT (command only) Aborts the operation being performed by a Host Link

command, and then returns to the initial status.

 INITIALIZE (command only) Initializes the transfer control procedures for all Host

Link Units.

IC Undefined command (response

only)

This is the response when the command header

code cannot be decoded.

Type Header

code

Name Function

Type Command

code

Name Function

MR SR

I/O memory area

access

01 01 MEMORY AREA READ Reads the contents of consecutive I/O

memory area words.

01 02 MEMORY AREA WRITE Writes the contents of consecutive I/O

memory area words.

01 03 MEMORY AREA FILL Writes the same data to the specified

range of I/O memory area words.

01 04 MULTIPLE MEMORY AREA READ Reads the contents of specified non-

consecutive I/O memory area words.

01 05 MEMORY AREA TRANSFER Copies the contents of consecutive I/O

memory area words to another I/O

memory area.

Parameter area

access

02 01 PARAMETER AREA READ Reads the contents of consecutive

parameter area words.

02 02 PARAMETER AREA WRITE Writes the contents of consecutive

parameter area words.

02 03 PARAMETER AREA FILL (CLEAR) Clears the specified range of parameter

area words.

Program area

access

03 06 PROGRAM AREA READ Reads the UM (User Memory) area.

03 07 PROGRAM AREA WRITE Writes to the UM (User Memory) area.

03 08 PROGRAM AREA CLEAR Clears a specified range of the UM

(User Memory) area.

Operating mode

changes

04 01 RUN Changes the CPU Unit’s operating

mode to RUN or MONITOR.

04 02 STOP Changes the CPU Unit’s operating

mode to PROGRAM.

Machine configura-

tion reading

05 01 CPU UNIT DATA READ Reads CPU Unit data.

05 02 CONNECTION DATA READ Reads the model numbers of the device

corresponding to addresses.

FINS Commands Section 1-3

Status reading 06 01 CPU UNIT STATUS READ Reads the status of the CPU Unit.

06 20 CYCLE TIME READ Reads the maximum, minimum, and

average cycle time.

Time data access 07 01 CLOCK READ Reads the present year, month, date,

minute, second, and day of the week.

07 02 CLOCK WRITE Changes the present year, month, date,

minute, second, or day of the week.

Message display 09 20 MESSAGE READ/CLEAR Reads and clears messages, and reads

FAL/FALS messages.

Access rights 0C 01 ACCESS RIGHT ACQUIRE Acquires the access right as long as no

other device holds it.

0C 02 ACCESS RIGHT FORCED ACQUIRE Acquires the access right even if

another device already holds it.

0C 03 ACCESS RIGHT RELEASE Releases the access right that has been

acquire.

Error log 21 01 ERROR CLEAR Clears errors or error messages.

21 02 ERROR LOG READ Reads the error log.

21 03 ERROR LOG CLEAR Clears all error log records.

File memory 22 01 FILE NAME READ Reads file device data.

22 02 SINGLE FILE READ Reads a specified length of file data

from a specified position within a single

file.

22 03 SINGLE FILE WRITE Writes a specified length of file data

from a specified position within a single

file.

22 04 FILE MEMORY FORMAT Formats (initializes) the file device.

22 05 FILE DELETE Deletes specified files stored in the file

device.

22 07 FILE COPY Copies files from one file device to

another file device in the same system.

22 08 FILE NAME CHANGE Changes a file name.

22 0A MEMORY AREA–FILE TRANSFER Transfers or compares data between the

I/O memory area and the file device.

22 0B PARAMETER AREA–FILE TRANSFER Transfers or compares data between the

parameter area and the file device.

22 0C PROGRAM AREA–FILE TRANSFER Transfers or compares data between the

UM (User Memory) area and the file

device.

22 15 DIRECTORY CREATE/DELETE Creates or deletes a directory.

Debugging 23 01 FORCED SET/RESET Force-sets or force-resets bits, or

releases force-set status.

23 02 FORCED SET/RESET CANCEL Cancels all bits that have been force-set

or force-reset.

Type Command

code

Name Function

MR SR

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