Changing the master clock function during a redundancy balancing
A description of this resolution:
- Change the master clock function after the redundancy balancing is complete
The redundancy balancing must be requested and started manually using the relevant CONFIN function.
The problem can be avoided if the master clock is not set until the redundancy balancing is completed or if it is set at the same time as linking is carried out.
'Changing the master clock function during a redundancy balancing' resolves the following:
If modules have already been linked for some time and the master clock function is then changed while a redundancy balancing is in progress, the redundancy balancing may be aborted.
The green active LED on the passive unit continues to flash. CONFIN does not result in the redundancy request being displayed on the active unit.
The underlying cause is:
- Old status information after cold start of the unit
When the master clock bit is changed, the module is rebooted. This software controlled cold start reads information from the NV-RAM which is not up-to-date. One of the consequences of this is that after the cold start the bits for the redundancy request may be deleted. The status of the module is the same as it was after the previous reset (by removing the fuse).