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TROUBLESHOOTING
22.4 Resetting Errors
The CPU module allows error resetting only for the errors that does not block the CPU
module operation.
The procedure for resetting an error is as follows.
1) Eliminate the cause of the error.
2) Store the error code to be reset to special register SD50.
3) Switch special relay SM50 from OFF to ON.
4) The error is reset.
If the CPU module is returned with the error reset, the special relay and special register
relating to the error, and the LED/LED indicator return to their state before the error
occurred.
If the same error occurs again after the error has been reset, it is recorded in breakdown
history again.
To reset multiple detected annunciators, only the first detected F number is reset.
POINT
When storing the error code to be reset in SD50 at error reset, the lower one digit
of the code number is ignored.
Example:
When error codes 2100 and 2101 occurred, resetting of error code 2100 results in
also resetting of error code 2101.
When error codes 2100 and 2111 occurred, resetting of error code 2100 does not
result in resetting of error code 2111.
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