Logical Blocks > Device Control function block

Device Control function block alarm detection

You can configure the alarm limits for the following standard alarms:
  • CFM_ACT1_TIME — The maximum time allowed to change from any state to the Active 1 state.

  • CFM_ACT2_TIME — The maximum time allowed to change from any state to the Active 2 state.

  • CFM_PASS_TIME — The maximum time allowed to change from any state to the Passive state.

  • CRACK_TIME — The maximum time allowed to lose the confirm for the state previous to this transition.

  • DELAY_TIME — Specifies the delay time when SP_D is changed from the Confirmed Passive state to an Active state before the change is sent to DC_STATE logic.

  • RESTART_TIME — Specifies the delay time when SP_D is changed when the Device Control block is not in the Confirmed Passive state. The value of OUT_D is held at the Passive state while DELAY_TIMER is active.

  • TRIP_TIME — The time that an Active confirm can be lost before the confirm is considered to be lost.