[Cause]
During the pulse check of a safety output signal, the output did not become OFF when an OFF pulse was output. The name of the signal where the abnormality was detected is displayed after the alarm message. In a system connected to multiple safety I/O devices, the number of the safety I/O device where the alarm occurred is displayed at the end of the alarm message, as shown by (1). The safety I/O device number can be checked on the DCS safety I/O device screen.
[Countermeasure]
1. Check the connection of the safety output signal.
2. B cabinet, replace the safety I/O board and emergency stop board.
3. Replace the emergency stop board.
Note To clear this alarm, power needs to be cycled.SERVO DCS Pulse check alarm (SFDO%d) %s
[Cause]
During the pulse check of a safety output signal, the output did not become OFF when an OFF pulse was output. The name of the signal where the abnormality was detected is displayed after the alarm message. In a system connected to multiple safety I/O devices, the number of the safety I/O device where the alarm occurred is displayed at the end of the alarm message, as shown by (1). The safety I/O device number can be checked on the DCS safety I/O device screen.
[Countermeasure]
1. Check the connection of the safety output signal.
2. B cabinet, replace the safety I/O board and emergency stop board.
3. Replace the emergency stop board.
Note To clear this alarm, power needs to be cycled.