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F05119 fault in siemens S120 Drive

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Cause : Bypass contactor simultaneity monitoring time exceeded comes when a feedback signal for the bypass contactor is interconnected and the simultaneity monitoring (p0255[5, 7]) activated.

After opening or closing a contactor of the parallel connection, after a monitoring time has elapsed, not all of the contactors have assumed the same state.

- check the monitoring time setting (p0255[5, 7]).
- check the wiring and control of the contactor.
- if required, replace the contactor.

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