Master Specification; Modbus Master Command List - Mitsubishi FX3U Series User Manual

FX Series Programmable Controllers
3U
User's Manual - MODBUS Serial Communication Edition
8.

Master Specification

This chapter explains the MODBUS Master functions supported by the FX-Series MODBUS
Communication ADP.
8.1

MODBUS Master Command List

Command Subcommand
Code
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x00
0x01
0x02
0x03
0x04
0x0A
0x0B
0x08
Diagnosis
0x0C
0x0D
0x0E
0x0F
0x10
0x11
0x12
0x0B
0x0C
0x0F
0x10
0x11
0x16
0x17
78
Command Name
Code
Read Coils
Read Discrete Inputs
Read Holding Registers
Read Input Registers
Write Single Coil
Write Single Register
Read Exception Status
Return Query Data
Restart Communication Option
Return Diagnostic Register
Change ASCII Input Delimiter
Force Listen Only Mode
Clear Counters and Diagnostic
Register
Return Bus Message Count
Return Bus Communication Error
Count
Return Bus Exception Error Count
Return Slave Message Count
Return Slave No Response Count
Return Slave NAK Count
Return Slave Busy Count
Return Bus Character Overrun
Count
Get Comm. Event Counter
Get Comm. Event Log
Write Multiple Coils
Write Multiple Registers
Report Slave ID
Mask Write Register
Read/Write Multiple Registers
8 Master Specification
8.1 MODBUS Master Command List
Details
Read binary (R/W) devices
Read binary (RO) devices
Read 16 bit (R/W) register
Read 16 bit (RO) register
Write single binary device
Write single 16 bit register device
Read 1 byte of vendor specified data
Loop back function
Restart communication /Remote
Communication Reset
Read 16 bit register of vendor specified data
Change ASCII mode End of Message character
Switch slave to Listen Only Mode
Clear all counters and the diagnostic registers
Read number of detected messages
Read number of detected comm. errors
Read number of detected exception
conditions
Read number of received requests
Read "No Response" counter of the slave
Read NAK counter of the slave
Read "Busy" counter of the slave
Read "Bus Character Overrun" counter of the
slave
Read comm. event counter
Read comm. event log
Write multiple binary (R/W) devices
Write multiple 16 bit (R/W) registers
Read Slave ID code data
Manipulate slave register with AND Mask /
OR Mask
Read/Write multiple 16 bit (R/W) registers