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MOV (OPEN/CLOSE) Block Documentation

Overview

The Motorized Operating Valve (MOV) is a vital component in industrial automation and fluid control systems. Designed for ON/OFF control, it facilitates automated flow regulation through electrically driven actuators, governed primarily by a Programmable Logic Controller (PLC).

  • MOVs are extensively used in process industries—such as oil and gas, water treatment, chemical manufacturing, and power generation—where reliable and responsive flow control is essential.

  • It supports both automatic and manual control modes, permission checks, interlock validation, command execution, and signal-based fault detection. The block outputs critical feedbacks to the HMI faceplates for Operator, Basic, Advanced, and Diagnostic levels.

Interaction modes include:

  • Block Icon (for real-time feedback and status)
  • Faceplates (expandable control panels per user level)
  • I/O Pins (to wire control signals and feedbacks in logic)

Block Icon

The MOV block visually represents its status using different color codes and blinking animations:

  1. MOV in Close Condition MOV Close Condition
  2. MOV in Open Condition MOV Open Condition
  3. Blinking – MOV in Trip Condition Blinking – MOV in Trip Blinking – MOV in Trip
  4. Blinking – Open or Close Permission Not Received Blinking – Open or Close Blinking – Open or Close
  1. Blinking – MOV Opening Blinking – MOV Opening Blinking – MOV Opening
  2. Blinking – MOV Closing Blinking – MOV Closing Blinking – MOV Closing

Note: On Clicking the MOV block icon, the corresponding faceplate below will be displayed.

Faceplate Tabs

In the MOV(Open/Close) faceplate, there are 4 tabs:

  1. Operation Tab : For the operation of the motor.

  2. Basic Tab : Displays basic feedback and operational summary.

  3. Advance Tab : Advanced options for motor configuration and setup.

  4. Diagnostics Tab : Shows all feedback and diagnostic parameters.

Operator Tab

MOV Open Condition

Operating Mode
  • AUTO: For automatic operation
  • MAN: For manual operation

    After selecting MAN, the operator can control the MOV manually.

Command (Available only in MANUAL mode)
  • OPEN: Press to open the valve
  • CLOSE: Press to close the valve
Feedbacks
Feedback Item Condition Status Indicator
PERM OPEN If open permission is OK 🟢 = Open Permission OK
🔴 = Open Permission Not OK
PERM CLOSE If close permission is OK 🟢 = Close Permission OK
🔴 = Close Permission Not OK
INTERLOCK If interlock condition is satisfied 🟢 = Interlock OK
🔴 = Interlock Active
MOV BLOCK ICON Static display showing MOV block icon with Tag Number Icon is always visible with corresponding Tag No.
Valve Status Based on combined status of permissions and interlock Shows Open/Close/Moving based on live MOV condition

Basic Level Tab

MOV Basic Faceplate

Feedback
Feedback Item Condition Status Indicator
Operating Mode Current MOV operating mode MANUAL / AUTO
Valve Status Valve is currently open or closed OPENED / CLOSED
Torque Status Torque switch condition 🟢 = Torque OK
🔴 = Torque Fault
Trip Feedback TRIP_FB signal received = TRIP OK
= TRIP
Run Feedback RUN_FB signal received 🟢 = Run Feedback OK
🔴 = Run Feedback Missing
Operational Summary
  • OPENED TIME (hr): Total valve open time
  • CLOSED TIME (hr): Total valve close time

Advanced Level Tab

On clicking the Adva button, the Adva Tab will open.

Only authorized users can access this after logging in.

MOV Advanced Faceplate

Valve Control Parameters
  • Run Feedback Time (sec): Time to receive RUN_FB
  • ZS Feedback Time (sec): Time to receive open/close (ZSO/ZSC) feedback
Operational Summary
  • OPENED TIME (hr): Total opened duration
  • CLOSED TIME (hr): Total closed duration
  • OPEN COUNT: Number of valve openings
  • CLOSE COUNT: Number of valve closings

Diagnostic Level Tab

MOV Diagnostic Faceplate

Diagnostic Parameters
Feedback Item Condition Status Indicator
CMD_Fault Any fault signal is available 🔴 = CMD_Fault (Fault Active)
🟢 = CMD_Fault (No Fault)
FB_Fault Any fault signal available 🔴 = FB_Fault (Fault Active)
🟢 = FB_Fault (No Fault)
Interlock Interlock status 🟢 = Interlock (No Interlock)
🔴 = Interlock (Active)
PERM OPEN Open permission status 🟢 = PERM OPEN (Satisfied)
🟡 = PERM OPEN (Not Satisfied)
PERM CLOSE Close permission status 🟢 = PERM CLOSE (Satisfied)
🟡 = PERM CLOSE (Not Satisfied)
Run Feedback RUN_FB signal received 🟢 = Run Feedback OK
🔴 = Run Feedback Missing
Trip_FB Trip signal status = TRIP OK
= TRIP
TSO (Torque Open) Torque open limit status 🟢 = TSO (Limit OK)
🔴 = TSO (Limit Not OK)
TSC (Torque Close) Torque close limit status 🟢 = TSC (Limit OK)
🔴 = TSC (Limit Not OK)
ZSC (Valve Closed) Closed feedback status =ZSC (Feedback Received)
= ZSC(Feedback NOT Received)
ZSO (Valve Opened) Open feedback status =ZSO (Feedback Received)
= ZSO(Feedback NOT Received)

This MOV(Open/Close) faceplate structure ensures full control and monitoring at both operator and supervisor levels.

Best Practices

  • Always ensure PERM_OPEN, PERM_CLOSE, and INTERLOCK_OK signals are valid before initiating commands.
  • Use the Diagnostic tab for troubleshooting feedback, torque, and trip signals.
  • Configure RUN_FB and ZS feedback timeout values appropriately to prevent false fault detection.