9.
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MAINTENANCE FUNCTION
9.3.3 Resetting error
The QnACPU can reset the errors only for the errors that continue operation of the CPU
module.
The procedure for resetting an error is as follows.
1) Eliminate the cause of the error.
2) Store the error code to be reset in special register SD50.
3) Turn on special register SM50.
4) The error is reset.
If the CPU module is reset with the error reset, the special relay and special register
relating to the error, and the LED/LED indicator, return to their status before error
occurrence.
If the same error occurs again after the error reset, it is recorded in the error history again.
To reset multiple detected annunciators, only the first detected F number is reset.
POINT
When an error is reset by storing its error code in SD50, the last two digits of the
error code are ignored.
Example:
If errors with error codes 2100 and 2111 have occurred, and error code 2100 is
reset, error code 2111 is also reset.
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