Cause : SI P1- Align monitoring functions comes when an error has occurred when aligning the Safety Integrated monitoring functions on processor 1 and processor 2. No common set of supported SI monitoring functions was able to be determined.

- there is a communication error between processor 1 and processor 2 or communication has failed.

Note: This fault results in a STOP A that cannot be acknowledged.

- carry out a POWER ON (power off/on).
- check the electrical cabinet design and cable routing for EMC complianc