Return Bus Message Count (Sub-Command Code: 0X0B) - Mitsubishi FX3U Series User Manual

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

7.11.7 Return bus message count (sub-command code: 0x0B)

Reads out the number of messages detected on the line to the master.
1) Request message format (Master → Slave)
2) Response message format (Slave → Master)
(When completed normally)
*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.
Function code Sub-function code
Function
Sub-function code
code
(000B
(08 )
H
(H)
Function code
Sub-function code
Function Sub-function code
code
(000B
(08 )
H
(H)
Function code
Function
code
(88
H
Data
(0000
) H
H
(L)
(H)
Data
Bus message count value
) (0000 to FFFF
H H
(L)
(H)
Data
Exception
2
code *
)
7 MODBUS Standard Commands
7.11 Diagnostics (Command Code: 0x08)
)
(L)
1
) *
H
(L)
1
2
3
4
5
6
7
8
9
10
63