Get Communications Event Log (Command Code: 0X0C) - Mitsubishi FX3U Series User Manual

FX Series Programmable Controllers
3U
User's Manual - MODBUS Serial Communication Edition
7.13

Get Communications Event Log (Command Code: 0x0C)

Acquires the communications event log of the FX-Series MODBUS Communication ADP into the master.
1) Request message format (Master → Slave)
2) Response message format (Slave → Master)
(When completed normally)
Function code
Function
Number of
code
read bytes
(0C )
H
*1. Since the FX-Series MODBUS Communication ADP does not support any program commands,
0000H is always stored.
*2. Refer to the following for the relevant counts, count clear methods and precautions.
Refer to Section 7.12.
*3. Refer to the following for the relevant counts, count clear methods and precautions.
Refer to Chapter 6.
*4. For information on the Communication Event Log and Communication event log Timing and
Communication event log Format refer to Section 9.5.
(When completed with an error)
*5. 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.
72
Function code
Function
code
(0C
Program command Communications event
status count value
(0000 ) * 1 (0000
H
(H) (L) (H)
Function code
Function
code
(8C )
H
7.13 Get Communications Event Log (Command Code: 0x0C)
)
H
Data
Bus message count value
(0000 to FFFF
H
to FFFF ) * 2
H H
(L)
(H)
(Number of read bytes)
Data
Exception
5
code *
7 MODBUS Standard Commands
Communications
Communications
) * 3 event log No. 0 * 4 event log No. 63
H
(L)