Module dynamos, faceplates, and detail displays > Module faceplates > Module faceplate reference

MPC loop faceplate (LOOPM_FP)

Figure: DeltaV Operate View of the MPC Loop Faceplate (LOOPM_FP)

The following items are contained in the faceplate:

  • BKCAL_IN1 Variable -  This field displays the BKCAL_IN1 value of the MPC block in yellow. The background color of the 3-D box changes from gray to orange or red when the BKCAL_IN1 status becomes uncertain or bad, respectively. The BKCAL_IN1 value is visible in the decimal format provided by MNPLT1_SCALE.DECPT.

  • Controlled Variable - This field displays the CNTRL1 value of the MPC block in yellow. The background color of the 3-D box changes from gray to orange or red when the CNTRL1 status becomes uncertain or bad, respectively. The CNTRL1 value is visible in the decimal format provided by CNTRL1_SCALE.DECPT.

  • Controlled Variable Units - This area provides the engineering units description used for the Controlled Variable as defined in the CNTRL1_SCALE parameter

  • Controlled Variable EU 100 - This value corresponds to 100% of scale for the controlled variable.

  • AUTO/MAN buttons - These buttons are used to set the target mode of the MPC block to the corresponding mode. The visibility of these buttons is based on permitted modes of the MPC block. The buttons for AUTO and MAN mode are displayed when the respective mode is a permitted mode.

  • Target Mode - This field contains a word in white text that describes the target mode for the loop. The background changes to blue when the target mode and normal mode are different.

  • Actual Mode - This field contains a word in yellow text that describes the ACTUAL mode of the loop. The background changes to blue when the actual mode and normal mode are different.

  • Setpoint slew keys - These buttons with an arrowhead pointing up or down are used to increment or decrement the setpoint value by 1 CNTRL1 engineering unit if CNTRL1_SCALE.F_DECPT is less than or equal to 1. If CNTRL1_SCALE.F_DECPT is 2 or greater, each click changes the setpoint by 0.1 engineering unit. The Setpoint slew keys are visible if the target mode is AUTO or MAN

  • Output bar graph - This field indicates the value of the BKCAL_IN1 parameter for the MPC block, which is the same as the value displayed in the BKCAL_IN1 Variable display box.

  • Manipulated Variable Output slew keys - These buttons with an arrowhead pointing up or down are used to increment or decrement the Setpoint value by 1 MNPLT1 engineering unit if MNPLT1_SCALE.F_DECPT is less than or equal to 1. If MNPLT1_SCALE.F_DECPT is 2 or greater, each click changes the Setpoint by 0.1 engineering unit. The Setpoint slew keys are visible if the target mode is AUTO, MAN, or OOS.

  • Manipulated Variable Output slider - To move this button, hold down the left mouse button while the cursor is over the arrowhead and then move the mouse up or down to correspond to the new manipulated value desired. The new value is then written to the MNPLT1 parameter of the MPC block. The arrowhead is controllable only when the target mode is MAN

  • Output Limits - These arrowheads are vertically positioned relative to the BKCAL_IN1 bar graph to indicate the High and Low Output Limits. Although these arrows cannot be dragged with the mouse, the values they indicate can be modified by using the module's detail display.

  • Tick marks - Use this vertical arrangement of black lines to indicate percentages of CNTRL1 and MNPLT1 scale.

  • Controlled Variable bar graph - This field indicates the value of the controlled variable parameter for the loop, which is the same as the value displayed in the Controlled Variable display box.

  • Setpoint slider/Working Setpoint - To move the Setpoint slider, hold down the left mouse button while the cursor is over the arrowhead and then move the mouse up or down to correspond to the new SP (Setpoint) value desired. The new value is then written to the SP1 parameter of the MPC block. The arrowhead is controllable only when the target mode is AUTO or MAN.

    Another arrowhead with the same size and movement range as the Setpoint slider but with a transparent fill color and a black border indicates the Working Setpoint (SP_WRK1) of the nth Controlled Variable in the MPC block. This arrow's movement range is restricted within the Setpoint Limit arrows and is the actual SP used by the controller to calculate output moves. When SP1 and SP_WRK1 have the same value, SP_WRK1 is superimposed upon SP1 and, therefore, is not distinguishable from SP1. The Working Setpoint is visible as a separate entity when Setpoint ramping prevents SP_WRK1 from going to SP1 immediately.

  • Setpoint Entry - Setpoint Entry is the 3-D recessed box displaying the SP1 value of the nth Controlled Variable in the MPC block. The Setpoint Entry box is next to the Setpoint slider. The background color of this box changes from gray to orange or red when the CNTRL1 status becomes uncertain or bad, respectively. Double-clicking this box while the target mode is AUTO or MAN produces a dialog that prompts you for an SP (Setpoint) value. The valid range for input is defined by the engineering unit EU 0 and EU 100 values of CNTRL1_SCALE. Valid input ranges from -10 percent to 110 percent of CNTRL1 scale. The SP value is visible in the decimal format provided by CNTRL1_SCALE.DECPT.

  • Setpoint Limits - These arrowheads are vertically positioned relative to the CNTRL1 bar graph to indicate the High and Low SP Limits. Although these arrows cannot be dragged with the mouse, the values they indicate can be modified by using the detail display.

  • Alarm Limits - These arrowheads are vertically positioned relative to the bar graph to indicate the High High, High, Low, and Low Low Alarm Limits for CNTRL1. Although these arrows cannot be dragged with the mouse, the values they indicate can be modified by using the module's detail display. Only alarms that are enabled have a corresponding arrowhead displayed. The color corresponds to the alarm priority.

  • EU 0 - This value corresponds to 0% of scale.

  • Alarm indications - This is a scrollable list of the current alarms that functions like the first two columns of an alarm summary. The first column shows the state of the alarm represented by one of the following symbols:

    • Active/unacked -- blank field

    • Active/acked -- checkmark

    • Inactive/unacked -- empty box

    The second column is the alarm name or parameter. The text and colors are as configured for the alarm's current state.

  • Unit field - This field displays the unit name.

  • Toolbar - Click the icons from left to right to perform the following functions, respectively:

    • Detail Display button: open the detail display for the loop module.

    • Primary Control Display button: open the primary control display.

    • Trend Display button: open the current trend display for the loop module.

    • Control Studio button: open Control Studio.

    • Event Chronicle button: open the Process History Viewer.

    • Acknowledge Alarms button: acknowledge all alarms on this module.

  • Module Error indicator - A flashing blue bar is displayed below the Detail Display button when a module error occurs. This prompts you to go to the detail display to view and clear the error.