欧姆龙FINS通讯协议手册：与PLC以太网通信指南

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"欧姆龙FINS通讯手册是关于如何与欧姆龙PLC通过以太网进行通信的指南，适用于欧姆龙的多种CPU型号，如CS1G/H-CPU、CJ1G/H-CPU等。手册包含了通信命令的详细说明，旨在帮助用户编写自己的程序来实现与PLC的交互。文档中还提到了安全警告和预防措施，以防止在操作过程中发生人身伤害或设备损坏。" 本文档主要涉及以下知识点： 1. **FINS（Factory Integrated Network System）协议**：FINS是欧姆龙开发的一种网络协议，用于在其自动化设备之间进行通信。该协议支持多种通信方式，包括串行通信和以太网通信，允许用户远程控制和监控PLC。 2. **欧姆龙PLC系列**：手册涵盖了CS1G/H-CPU和CJ1G/H-CPU等系列的PLC。这些PLC是欧姆龙工业自动化系统中的核心部件，用于处理逻辑控制、数据采集和过程控制等功能。 3. **通信命令**：手册详细介绍了用于与欧姆龙PLC进行通信的命令集，这些命令可能包括读取和写入寄存器、执行程序、设置参数等操作。了解这些命令对于编写与PLC交互的程序至关重要。 4. **安全提示**：文档中提到了"DANGER"、"WARNING"和"Caution"三个级别的安全警示，分别对应可能导致死亡或重伤、可能造成死亡或重伤以及可能导致轻伤或财产损失的危险情况。在实际操作中，必须严格遵守这些提示，确保操作安全。 5. **应用实例**：虽然具体内容未提供，但通常这样的手册会包含示例代码或步骤，指导用户如何设置通信参数，建立连接，并进行数据交换。 6. **硬件接口**：如CS1W-SCB21/41和CJ1W-SCU41等模块，是实现FINS通信的关键硬件，它们提供了与PLC进行网络连接的功能。 7. **编程语言支持**：虽然没有具体提及，但通常欧姆龙PLC支持其专有的编程语言如Ladder Logic（梯形图）、Structured Text（结构化文本）等，用户需要掌握这些语言来编写与PLC通信的程序。 8. **故障排查**：手册可能还包含了故障诊断和排除的指南，帮助用户解决在通信过程中遇到的问题。为了成功地实现与欧姆龙PLC的FINS通信，你需要理解上述知识点，并结合手册提供的详细信息，正确配置硬件，编写合适的通信程序，同时确保遵循所有安全规定。这将使你能够有效地监控和控制自动化系统，提高生产效率和设备性能。

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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