Skip to content

Visualization Documentation – SOV-SA Block

Usage of SOV-SA Block in Visualization

The SOV-SA (Single Acting Solenoid Valve) block is used for controlling spring-return valves in process systems.
This visualization component offers real-time control commands, permission interlocks, and feedback diagnostics for operators and technicians.

Integrating the SOV_SA Block into Visualization steps are given below:

1. Open the Visualization Page

  • Launch your CODESYS project.
  • Navigate to your visualization target page (e.g., Main_HMI, Valve_Control).

2. Insert the SOV_SA Block Icon from Scada_test visu page

  • Open the Visualization Toolbox Go to Current Project.
  • Drag or drop the SOV_SA block icon to your Visualization page.
  • Or Just Copy the SOV_SA Block Icon from the Scada_test visu page and Paste into your Visualization page.

This promotes standardization and ensures consistent behavior across all HMI pages.

3. Set Referencing Properties

  • Select the inserted SOV_SA block icon.
  • click on the block icon Properties tab open automatically → Properties.
  • Go to the References and Expand the references.
  • you will see bl_SOV_SA Expand that also.
  • set the path in front of the tag_SOV_SA by Double clicking on empty space and select the required tag.
  • Build and run the project.
  • During runtime, confirm the valve responds and displays correct feedback.

SOV-SA Block Icon – Visualization Behavior

Block Icon

Clicking the Tagname inside the SOV_SA icon will open its faceplate, which supports multi-level interaction.

SOV_SA Faceplate Overview

The faceplate for the SOV block is divided into four levels:

  1. Operator Tab
  2. Basic Tab
  3. Advanced Tab
  4. Diagnostics Tab

Faceplate - Operator Tab

Block Icon

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

    After selecting MAN, operator can manually control the SOV.

Command (Available only in MAN 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
SOV BLOCK ICON Shows the Solenoid Valve block icon with tag number. Displayed as graphical block with tag ID
Status Displays the current status of the SOV (Open / Close / Running).

Faceplate - Basic Tab

Block Icon

Summarizes valve mode and open/close state for operator view.

Parameter Description
Operating Mode Displays current mode: AUTO / MANUAL
Valve Status Indicates if valve is OPENED or CLOSED OR NONE

Faceplate - Advanced Tab

Block Icon

For configuration and tracking valve usage. Access is restricted to authorized roles.

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

Faceplate - Diagnostics Tab

Block Icon

Offers full diagnostic detail of feedback, permissions, and faults.

Diagnostic Parameters
Feedback Item Condition Status Indicator
CMD Fault Command fault or externally operated. 🟢 = Everything OK
🔴 = Fault is Available
INTERLOCK Interlock condition status. 🟢 = No Interlock
🔴 = Interlock Available
PERM OPEN Open permission status. 🟢 = Open Permission Satisfied
🔴 = Not Satisfied
PERM CLOSE Close permission status. 🟢 = Close Permission Satisfied
🔴 = Not Satisfied
ZSC Closed feedback status. 🟢 = Closed Feedback Received
🔴 = Not Received
ZSO Open feedback status. 🟢 = Open Feedback Received
🔴 = Not Received

Dynamic Icon Behavior

The SOV block icon automatically changes appearance based on valve status or alarm conditions:

  • ✅ Green: Valve is fully opened
  • ✅ Red: Valve is fully closed
  • ✅ Yellow/Orange: Feedback or permission fault
  • ✅ Blinking: Transitioning state (opening/closing)

Click on the icon’s tag to open the faceplate and take action.

Training or Demo Video

Demonstration video available for understanding faceplate operation:

👉 SOV-SA Block Demo – TPW HMI

Summary

The SOV_SA block allows safe and flexible valve operation, especially in spring-return solenoid valves.
By integrating with TPW’s HMI system:

  • Operators can command and monitor valves in real time.
  • Engineers can adjust control parameters and monitor diagnostics.
  • Faceplate access ensures structured user interaction based on user levels.

This block provides a balance between ease of use and detailed control diagnostics for process safety and reliability.