Commissioning / Operation / Maintenance AddFEM
5-64
AddFEM
C79000–G8076–C900–03
1)
Note
If there is no optical–fiber cable redundancy coupling or if it is faulty, the automa-
tion processor decides the master/reserve assignment on the basis of the current
error weighting.
2)
Notice
Please note that the key–operated switch has to be turned to the STOP position
before plugging the optical–fiber redundancy connection during operation to the
reserve module and that it may only be turned to the RUN position after the opti-
cal–fiber redundancy connection has been plugged.
If this point is not observed, untentional multiple master/reserve changes may oc-
cur after plugging, if both modules have errors with equal error weighting (for ex-
ample, due to external errors at the process signals connected to both process
signals).
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