R7E-YS2-R datasheet(5/31 Pages) MSYSTEM

5 / 31 page

MODEL: R7E

R7E SPECIFICATIONS

ES-7807 Rev.13 Page 5/31

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

MODBUS FUNCTION CODES & SUPPORTED CODES

■ Data & Control Functions

CODE

NAME

Read Coil Status

Digital output from the slave (read/write)

Read Input Status

Status of digital inputs to the slave (read only)

Read Holding Registers

General purpose register within the slave (read/write)

Read Input Registers

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

Force Single Coil

Digital output from the slave (read/write)

Preset Single Register

General purpose register within the slave (read/write)

Read Exception Status

Diagnostics

Program 484

Poll 484

Fetch Comm. Event Counter

Fetch a status word and an event counter

Fetch Comm. Event Log

A status word, an event counter, a message count and a eld of event bytes

Program Controller

Poll Controller

Force Multiple Coils

Digital output from the slave (read/write)

Preset Multiple Registers

General purpose register within the slave (read/write)

Report Slave ID

Slave type / ‘RUN’ status

Program 884/M84

Reset Comm. Link

Read General Reference

Write General Reference

Mask Write 4X Register

Read/Write 4X Register

Read FIFO Queue

■ Exception Code

CODE

NAME

Illegal Function

Function code is not allowable for the slave

Illegal Data Address

Address is not available within the slave

Illegal Data Value

Data is not valid for the function

Slave Device Failure

Acknowledge

Slave Device Busy

Negative Acknowledge

Memory Parity Error

■ Diagnostic Subfunctions

CODE

NAME

Return Query Data

Loop back test

Restart Comm. Option

Return Diagnostic Register

Change Input Delimiter Character

Force Slave to Listen Only Mode

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