DC_fp (Device Control function block faceplate)

Configuration view of the Device Control function block faceplate (DC_fp)

The DC_fp is used with the Device Control (DC) function block. The following list describes the major components that are present on the DC_fp.
Interlocked status icon
Icon Status Description
Interlocked (Interlock condition)
Visible when either of the following is true:

  • The DC block's DC_STATE parameter is Shutdown/Interlock

  • The EDC block's OPERATION_STATE parameter is Shutdown/Interlock

Bypassed status icon
Icon Status Description
Bypassed Visible when the module level BYPASSED parameter is True. Interlock bypassed applies only to DC or EDC blocks. Tracking condition bypassed applies to all other function blocks
No Permit status icon
Icon Status Description
No Permit (Permissive condition)
Visible when any of the following is true: For a DC block:

  • DEVICE_OPTS parameter is set to Permissive

  • DC_STATE is set to Confirmed Passive

  • There is no permit

For an EDC block:

  • Only the Device Option for Permissive is true, EDC block is in the passive state, and there is no permit

  • The Device Option for Permissive to Any State is true, and there is no permit

Simulate Active status icon
Icon Status Description
Simulate Active Visible per the Simulation Active condition in the module's BLOCK_ERR parameter. The Simulation Active icon is never visible if either the Not Running or Bad IO icon is visible.
PV
Shows the module's PV value and the PV engineering units. The text color is based on the PV status (blue when the PV status is good and a shade of red when the status is uncertain or bad).
State buttons
Depending on the type of discrete device being controlled, a faceplate provides either two or three state buttons, each labeled with a text description of its corresponding state. Click one of these buttons to set the target state (SP_D of the Device Control block) to the state described on the button (when the state is permitted).
Accept check box
Use this check box to toggle the ACCEPT_D parameter in the Device Control block. When Accept is checked, the actual state (PV_D) is set to the output state (OUT_D), regardless of the discrete input states that determine FV_D.
Target Mode
Shows the target mode for the module. When the normal and target modes are not the same, an exclamation point displays to the left of the text.
Actual Mode
Shows the actual mode for the module. When the actual and target modes are not the same, an exclamation point displays to the left of the text.
State transition timer
Time Limit
Shows the confirm time for the current setpoint of the Device Control block (for example, CFM_PASS_TIME when SP_D is passive).
Elapsed Time
Shows the transition timer that begins to increment when the outputs are driven as a result of a change in SP_D.
Device state
Shows the current state of the DC_STATE parameter in the Device Control block. When the device state is Locked, a reset button appears on the faceplate. Use the reset button to reset the device state.
Device state reset button
Resets the device state. This button is visible only when the device state is Locked.
Delay timer
Shows the module's DELAY_TIMER value - the time remaining for the delay or restart to be complete. The timer counts down to zero.
Fail condition
Shows the current state of the FAIL parameter in the Device Control block.
Trend chart
Provides a condensed version of a trend chart.
Detail display button
Open the module detail display.
Faceplate button
Opens the module faceplate display.