ABB 07CR41 Operating Manual page 113

Acknowledgement
after error recovery:
Advant Controller AC 31 / Issued: 01.99
Class 1 errors: Class 2 errors:
Fatal error Serious error
- Power on
- Power on
- Cold start
- Software cold restart
- Software warm start
or RESET
- Software
acknowledgment
Class 3 errors:
Light error
Switch RUN/STOP from STOP to RUN
- Program start via software
- Software warm start
- Software cold start
- Power on
- Software acknowledgement (command: MAIL)
- Acknowledgement via programming (CS31QU)
- Test button on the 30 and 90 series remote units
7 – 3 Diagnosis
Class 4 errors:
Warnings
- Automatic acknow-
ledgement if the error
number ≤ 15
3