SP network in "no enable" status during startup

Device status of the SP master: No enable

The SP master awaits the readiness state of the SP slaves.

  • Status bit 6 (sync signal active) in the status word is set to "1":
  • → The SP master sends the synchronization signal.
  • The binary output DO01 is set to "1":
  • → The SP master is ready.
  • The binary inputs are set to "0":
  • → Other stations in the synchronization network are not ready.

Possible causes:

  • The supply system of the SP slaves is not connected (e.g. during startup).
  • The message chain is not closed correctly. Observe chapter Connect digital inputs/outputs.

Device status of SP slave 1: No enable

SP slave 1 does not receive a ready signal and therefore does not forward a ready signal.

  • Status bit 6 (sync signal active) in the status word is set to "1":
  • → The SP slave receives the synchronization signal from the SP master.
  • One binary input is set to "0" or both binary inputs are set to "0":
  • → Other stations in the synchronization network are not ready.
  • → SP slave 1 is not ready and sets both binary outputs to "0".

Possible causes:

  • The supply system of other SP slaves is not connected (e.g. during startup).
  • The message chain is not closed correctly. Observe chapter Connect digital inputs/outputs.


Device status of SP slave 2: Not ready

SP slave 2 does not yet receive a synchronization signal and remains in the "not ready" device status.

  • Status bit 6 (sync signal active) in the status word is set to "0":
  • → SP slave 2 does not receive a synchronization signal and remains in the "not ready" device status while this is the case.
  • One binary input is set to "0" or both binary inputs are set to "0":
  • → Other stations in the synchronization network are not ready.
  • → SP slave 2 is not ready and sets both binary outputs to "0".

Possible causes: