MODEL: R1M-A1

R1M-A1 SPECIFICATIONS

ES-5661 Rev.14 Page 5/10

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

MODBUS COMMUNICATION

■ COMMUNICATION PARAMETERS

PARAMETER

SPECIFICATION

Data Mode

RTU

Baud Rate

9600 / 19200 / 38400 (*) bps

Parity

None / Odd (*) / Even

Bit Length

8

Stop Bit

1 (*) / 2

Node Address

1 (*) to 15

Floating Point Data

N/A

Interface

RS-232-C/ RS-485

(*) Ex-factory setting

■ FUNCTION CODES & SUPPORTED CODES

CODE

NAME

01

Read Coil Status

X

Digital output from the slave

02

Read Input Status

X

Status of digital inputs to the slave

03

Read Holding Registers

X

General purpose register within the slave

04

Read Input Registers

X

Collected data from the field by the slave

05

Force Single Coil

X

Digital output from the slave

06

Preset Single Registers

X

General purpose register within the slave

07

Read Exception Status

08

Diagnostics

09

Program 484

10

Poll 484

11

Fetch Comm. Event Counter

Fetch a status word and an event counter

12

Fetch Comm. Event Log

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

16

Preset Multiple Registers

X

General purpose register within the slave

17

Report Slave ID

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 Register

24

Read FIFO Queue