MODEL: R7K4FE-6-DC16

R7K4FE-6-DC16 SPECIFICATIONS

ES-7778-A Rev.2 Page 4/7

https://www.m-system.co.jp/

MODBUS FUNCTION CODES & SUPPORTED CODES

■ Data and Control Functions

CODE

NAME

01

Read Coil Status

X

Digital output from the slave（read ／ write）

02

Read Input Status

Status of digital inputs to the slave（read only）

03

Read Holding Registers

General purpose register within the slave（read ／ write）

04

Read Input Registers

Collected data from the field by the slave（read only）

05

Force Single Coil

X

Digital output from the slave（read ／ write）

06

Preset Single Register

General purpose register within the slave（read ／ write）

07

Read Exception Status

08

Diagnostics

X

09

Program 484

10

Poll 484

11

Fetch Comm. Event Counter

X

Fetch a status word and an event counter

12

Fetch Comm. Event Log

X

A status word, an event counter, a message count and

a field of event bytes

13

Program Controller

14

Poll Controller

15

Force Multiple Coils

X

Digital output from the slave（read ／ write）

16

Preset Multiple Registers

General purpose register within the slave（read ／ write）

17

Report Slave ID

X

Slave type ／‘RUN’status

18

Program 884 ／ M84

19

Reset Comm. Link

20

Read General Reference

21

Write General Reference

22

Mask Write 4X Register

23

Read ／ Write 4X Registers

24

Read FIFO Queue

■ Exception Code

CODE

NAME

01

Illegal Function

X

Function code is not allowable for the slave

02

Illegal Data Address

X

Address is not available within the slave

03

Illegal Data Value

X

Data is not valid for the function

04

Slave Device Failure

05

Acknowledge

06

Slave Device Busy

07

Negative Acknowledge

08

Memory Parity Error

■ Diagnostic Subfunctions

CODE

NAME

00

Return Query Data

X

Loop back test

01

Restart Comm. Option

02

Return Diagnostic Register

03

Change Input Delimiter Character

04

Force Slave to Listen Only Mode

MODBUS I/O ASSIGNMENT

ADDRESS

DATA TYPE

DATA

Coil (0X)

1 – 16

Digital Output