Checking Data Transfer Sequence Errors - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
N:N Network
9.6.2

Checking data transfer sequence errors

When a link error occurs in the master station or slave station, the data transfer sequence error flag turns ON.
The data transfer sequence error flag varies depending on the FX Series and station number. Refer to the
table below.
FX Series
FX , FX , FX
1N 1NC 2N
FX , FX , FX
2NC 3S 3G
FX , FX , FX
3GC 3U
FX , FX
0N 1S
9.6.3 Checking error codes
When a data transfer sequence error occurs, the corresponding data transfer sequence error flag turns ON,
and the error code is stored in the corresponding data register.
1. Error storing device
The data register used to store the data transfer error code varies depending on the FX Series and station
number. Refer to the table below.
FX Series
FX , FX , FX
1N 1NC 2N
FX , FX , FX
2NC 3S 3G
FX , FX , FX
3GC 3U
FX , FX
0N 1S
2. Error code list
The data register for storing the data transfer error code stores the corresponding error code. When a data
transfer sequence error occurs, refer to the error code list shown below, and confirm the check points.
Error
Error name
code
01H Monitoring timeout
Station number
02H
error
03H Counter error
Message format
04H
error
11H Monitoring timeout
Message format
14H
error
Slave station no
21H
response error
Slave
Master
station
station
No. 1
,
, M8183 M8184
3UC
M504 M505
Slave
Master
station
station
No. 1
,
, D8211 D8212
3UC
D211 D212
Station Station
in which which
error detected
occurred error
L
L
L
L M, L
M
M
L
9.6 Checking Absence/Presence of Data Transfer Errors
Slave Slave Slave
station station station
No. 2 No. 3 No. 4
M8185 M8186 M8187
M506 M507 M508
For error codes, refer to the next page.
Slave Slave Slave
station station station
No. 2 No. 3 No. 4
D8213 D8214 D8215
D213 D214 D215
Contents of error
Slave station did not respond to the
M sending request from the master station
within the monitoring time.
An unexpected slave station responded
M to the sending request by the master
station.
The counter value included in the
M parameter data is different from the
counter value given by a slave station.
The message given by the slave station
is incorrect.
The master station did not give a sending
L request to the next slave station within
the monitoring timer.
The message from the master station is
L
incorrect.
*1
The specified slave station does not exist.
L
9 Troubleshooting
Slave Slave Slave
station station station
No. 5 No. 6 No. 7
M8188 M8189 M8190
M509 M510 M511
Slave Slave Slave
station station station
No. 5 No. 6 No. 7
D8216 D8217 D8218
D216 D217 D218
Check point
Wiring and power
supply
Station number
settings
Wiring
Wiring, power
supply and station
number settings
Wiring and power
supply
Wiring, power
supply and station
number settings
Wiring, power
supply and station
number settings
B-51
A
B
C
D
E
F
G
H
I
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