Visualization Documentation – DACA Block
Usage of DACA Block through SCADA Template
The DACA
block icon is implemented in contexts where a straightforward indication and a cautionary visual representation are required.
In the SCADA Template system, this block is used as a reusable visualization component, enabling runtime control, diagnostics, and engineering configuration.
This block is accessed through a template-based visualization structure, where the graphical icon is pre-configured and placed inside the reusable Scada_test
Visu Page.
- Use the DACA Block icon on any custom visualization page and link it to their corresponding logic instance.
Integrating the DACA Block into Visualization steps are given below:
1. Open Your Visualization Page
- Launch your CODESYS project.
- Navigate to the visualization screen where you want to control analog output (e.g.,
AO_Control
,Main_HMI
, etc.).
2. Insert the DACA Block Icon from Scada_test
visu page
- Open the Visualization Toolbox Go to Current Project.
- Drag or drop the DACA block icon to your Visualization page.
- Or Just Copy the DACA Block Icon from the
Scada_test
visu page and Paste into your Visualization page.
âś… This method maintains visual consistency and supports template reusability.
3. Link the DACA Block to Its Logic Instance
- Select the DACA block icon.
- click on the block icon Properties tab open automatically → Properties.
- Go to the References and Expand the references.
- you will see bl_DACA_tag or bl_DACA_desc Expand that also.
- set the path in front of the tagDACA_fp by Double clicking on empty space and select the required tag.
- Build and run the project.
- During runtime, verify that live values like
PV
functioning.
DACA Block Icon - Visualization Behavior
The DACA block icon includes a Clickable Tagname that opens a faceplate popup during runtime.
This faceplate is divided into multiple access-level tabs:
- Oper Tab – Operator functions
- Adva Tab – Engineering & diagnostic parameters
Faceplate – Operator Tab
This tab is focused on Real-time monitoring and Acknowledge the alarm..
DACA Parameters Details – Operartor Tab
Section | Parameter | Description |
---|---|---|
Process Output | PV |
This show the process output value. |
Acknowledge | ACK |
This button is used to acknowledge the alarm of this perticular DACA. |
PV Bar | Bar |
Bar shows PV value in visual form. |
Faceplate – Advance Tab
This tab contains Engineering and diagnostic-level configurations.
DACA Parameters Details – Advance Tab
Section | Parameter | Description |
---|---|---|
Process Output | PV |
This show the process output value. |
PV Lower Limit | PV_LO |
Low limit of process value |
PV Higher Limit | PV_HI |
High limit of process value |
Alarm Very Low limit | PVLL |
Very low limit alarm value |
Alarm Low limit | PVLO |
Low limit alarm value |
Alarm High limit | PVHI |
High limit of alarm value |
Alarm Very High limit | PVHH |
Very High limit of alarm value |
PV Input Type | IN_Type |
LIN : Value of the PV will be linear. SQRT : Value of the PV will come in square root. |
PV Bar | Bar |
Bar shows PV value in visual form. |
đź”’ Access to this tab should be restricted via user roles to avoid unintended changes.
Demo / Training Video
🎥 Watch Demo – TPW HMI DACA Block Walkthrough
This video shows how to insert, configure, and use the DACA block within a SCADA template project.
Integration Notes
- The DACA block icon must always be linked to a logic instance using the Element Variable in properties.
- Ensure simulation mode is OFF during live commissioning unless required for testing.
- Use access control to prevent unauthorized changes to advanced settings.
Summary
The DACA block is a core part of TPW's SCADA template system, designed for analog output management. It offers:
âś… Reusable template-based visualization
âś… Faceplate with operator and engineering access
âś… Diagnostic features and simulation support
The DACA block ensures scalable, reliable, and flexible control of analog outputs in modern automation systems.