Canceling Errors - Mitsubishi MELSEC User Manual

12
TROUBLESHOOTING

12.4 Canceling Errors

Bit number of SD81/error factor corresponding to
continuation error
Bit number
0 Instantaneous power failure
1 Battery low
2 Standard ROM write count excess
3 Test mode continuous RUN tolerance timeout
4 Scan timeout
5 Annunciator ON
6 Safety remote station detection error
Safety remote station product information
7
mismatch
Initial monitoring timeout error
8 Safety monitoring timeout
Error menitoring timeout error
Safety remote station command error
Safety remote station data split error
9 Safety remote station link ID error
Safety remote station running number error
Safety remote station reception data error
12
- 56 12.4 Canceling Errors
CPU module can perform the cancel operation for errors only when the errors allow
the CPU module to continue its operation.
The occurring continuation error can be checked by the bit which is turned "1" of
SD81 (error factor). Error factor/continuation error corresponding to the bit number of
SD81 is shown in Table12.8.
Table12.8 Error factor/error code corresponding to bit number of SD81
Error factor
To cancel the errors, follow the steps shown below.
1) Read the special register SD81 with GX Developer and confirm the cause of
the continuation error that currently occurs in the CPU module.
2) Eliminate the cause of the error.
3) Store the error code to be canceled in the special register SD50.
4) Energize the special relay SM50 (OFF
5) Read the special register SD81 with GX Developer again and confirm that the
bit corresponding to the canceled continuation error is turned OFF.
6) Turn the special relay SM50 OFF.
After the CPU module is reset by the canceling of the error, the special relays, special
registers, and LEDs associated with the error are returned to the status under which
the error occurred.
If the same error occurs again after the cancellation of the error, it will be registered
again in the operation/error history.
Continuation error corresponding to bit number of SD81
Error code
1500 AC/DC DOWN
1600 BATTERY ERROR
1610 EXCEED MAX FLASH ROM REWRIT.ERR.
8100 TEST MODE TIME EXCEEDED
5010 PROGRAM SCAN TIME OVER
9000 F**** (**** indicates the annunciator number.)
8300 CC-LINK REMOTE DETECTION ERROR
8310 CC-LINK PRODUCT INFO. MISMATCH
8320
8321 CC-LINK DATA RECEPTION TIMEOUT
8322
8330
8331
8332 CC-LINK RECEIVED DATA ERROR
8333
8334
ON).
Error message