Function block parameters > Option bitstring parameters

Device options

The device options parameter (DEVICE_OPTS) allows you to select device controller logic options. You can set device options in any mode. The following device options are supported in the Device Control function block:
  • Interlock — When the Interlock option is enabled (True) and the INTERLOCK_D input is False, OUT_D is set to the Passive state and is held there until INTERLOCK_D is set to True.

  • SP Track — When the SP Track option is enabled (True), SP_D tracks OUT_D when the actual mode is Local Override (LO).

    WARNING!

    Disabling this option can potentially start the equipment when unattended if the SP is left Active following a failed start due to an interlock.

  • Permissive — Allows OUT_D to transition from a Passive state to an Active state or from one Active state to another when SP_D requests. When the Permissive is enabled (True) and the PERMISSIVE_D input is set True, OUT_D is allowed to transition from the Passive state to an Active state or from one Active state to the other when SP_D requests.

  • Reset Required — When the Reset Required option is enabled (True) and OUT_D is forced to Passive because of an interlock, shutdown, or run confirmation failure, OUT_D remains at Passive until RESET_D is set to True.

  • Trip — When the Trip option is enabled (True) and an Active Confirm is lost for a time greater than TRIP_TIME, OUT_D is set to Passive. The SP_D value must return to Passive to clear the tripped condition. When the Reset Required option is enabled (True), RESET_D must also be set to True to clear the tripped condition.

  • Passive when Confirmed — When the Passive when Confirmed option is enabled (True) and the field device is confirmed to the desired Active state, OUT_D is changed to the Passive state.

  • Passive on Active Timeout — When the Passive on Active Time-out option is enabled (True) and an Active state is not confirmed within the confirm time following a command to an Active state, OUT_D is changed to the Passive state.