User Manual

Service and Fault Messages
Overcurrent Protection
23
Siemens Industry, Inc.
Application Note, App 14900
140-1231
2020-02-11
Overcurrent Protection
If the sum of the current flowing through all of the relays exceeds 3A, all of the relays
will revert to their OFF state and the OverCurrent binary value object will turn ON. The
RDY2000BN will remain in that state for four minutes. After that time, all of the relays
that were placed in the OFF state will change to their ON state.
Then, the controller re-evaluates the overcurrent condition:
● If the sum of the current through the relays does not exceed 3A, the RDY2000BN
controls normally, and the OverCurrent binary value turns OFF
● If the sum of the current through the relays exceeds 3A again, the process repeats
itself, and the OverCurrent binary value turns ON.