Return Bus Communication Error Count (Sub-Command Code: 0X0C) - Mitsubishi FX3U Series User Manual

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

7.11.8 Return bus communication error count (sub-command code: 0x0C)

Reads out the number of error messages detected on the line to the master.
1) Request message format (Master → Slave)
Function code
2) Response message format (Slave → Master)
(When completed normally)
Function code
*1. Refer to Chapter 6 for the relevant counts, count clear methods and precautions.
(When completed with an error)
*2. Exception and error codes are stored in special data registers and special auxiliary relays in the case
of error completion. Refer to Chapter 6 for storage location, confirmation methods, and other detailed
contents.
64
Sub-function code
Function Sub-function code
(000C
code
(08 )
H
(H)
Sub-function code
Function
Sub-function code
code
(000C
(08 )
H
(H)
Function code
Function
code
(88
Data
) (0000
H
(L)
(H)
Data
Bus communication
) error count value
H
(0000 to FFFF
H
(L)
(H)
Data
Exception
2
code *
)
H
7 MODBUS Standard Commands
7.11 Diagnostics (Command Code: 0x08)
)
H
(L)
) *
1
H
(L)