Modbus Error Code List - Mitsubishi FX3U Series User Manual

FX Series Programmable Controllers
3U
User's Manual - MODBUS Serial Communication Edition
2) Error codes
When a communication error occurs while using MODBUS communication, the corresponding
communication error flag turns ON, and the MODBUS error code is stored in the corresponding data
register.
Device
D8063
D8402
D8403
D8422
D8423
D8438
12.6

MODBUS Error Code List

Note
Only one channel can be used for MODBUS serial communication.
MODBUS
Error
Code
Invalid Hardware Setup
Failed to detect MODBUS communication
0201 adapter
Details:
Channel number 1 or 2
Invalid Parameter Setup
MODBUS communication parameter settings
are invalid
0202
Details:Special D register (Device Address)
causing the error code
e.g. Invalid slave number channel 1: Details
(D) 8414
Channel Double Use
Single channel used for more than one type
0203
of communication
(i.e.
configured for the same channel)
106
Name
Serial Communication Error Code 1 (ch1)
MODBUS Communication Error Code on ch1 Set to corresponding MODBUS Error Code on ch1.
MODBUS Communication Error Details on
ch1
MODBUS Communication Error Code on ch2 Set to corresponding MODBUS Error Code on ch2.
MODBUS Communication Error Details on
ch2
Serial Communication Error Code 2 (ch2)
Error Name and Details
MODBUS and N:N
Set to 6321, representing MODBUS Error on ch1.
Set to Error Details for MODBUS Error Code in
D8402.
Set to Error Details for MODBUS Error Code in
D8422.
Set to 3821, representing MODBUS Error on ch2.
→ For the MODBUS Error Code List, refer to Section 12.6.
Master
Related Devices:(M & D)
/ Slave
CH1: M8063 set to ON
Master
/ Slave CH2: M8438 set to ON
Master
See above
/ Slave
Master
See above
/ Slave
Networking
12 Troubleshooting
12.6 MODBUS Error Code List
Description
Corrective Action
D8063 set to 6321
M8402 set to ON
D8402 set to
MODBUS Error
Code
M8403 set to ON Verify that the
D8403 set to Error MODBUS Special
Details Adapters are being
used
D8438 set to 3821 (FX
3U
M8422 set to ON or FX
D8422 set to
MODBUS Error
Code
M8423 set to ON
D8423 set to Error
Details
Invalid Parameter
values will not be
entered
corresponding data
registers.
Check MODBUS
configuration program
block.
Make sure only one
Channel is setup for
MODBUS Serial
Communication.
-485ADP-MB,
-232ADP-MB)
3U
into the