Skip to main content

Send custom data from PLC to camera

Step 1: Create and Configure the Custom Data Tag​

Start by creating two tags, one to copy data from the custom data tag and the other to move it on to the camera output tag. Both have to be a STRING data type.

Custom Data Tags

Step 2: Define the Byte Order for Node-RED​

You can choose any byte order from the output assembly assigned for Node-RED. The byte order refers to how the data is formatted and transmitted.

Example of Byte Order Assigned to Custom Data for Node-RED

Step 3: Develop Trigger Logic​

After creating the custom data tag, use the trigger logic detailed in Trigger Using a PLC to create a new set of logical instructions. The trigger logic should handle the camera's activation, ensuring that it captures an image whenever specific conditions are met.

Trigger Logic for Sending Numeric Data

note

If you trigger the same VIN twice the data won’t be stored on the second image. Try to clear the data before sending the new one in.

Step 4: Create a Flow in Node-RED​

Access the Node-RED flow and create a new flow that mirrors the required functionality.

Node-RED Flow Example for Sending Custom Data

Step 5: Capture the Image and Associate Metadata​

After triggering the camera, verify that the image capture process is working as expected.

Ensure that each image the camera takes has metadata, including the custom data.

Image Capture with Metadata