Transaction Group Execute too early

Ignition
1

Hello,

I have set up a transaction Group for calling a stored procedures in SQL Server.

There are :

  • one input parameter
  • one output parameter
  • one trigger

Sometimes, the transaction is fired before Ignition get the input parameter.
Althought I checked the checkbox "Only evaluate when values have changed" and selecting the input parameter.

How do you manage this kind of situation ?
I could add a timer in the PLC before set the trigger but I hope there i a better way.

2

What kinds of items are these? What are your transaction group settings?

3

It's integer tags. The PLC is a ControlLogix. We use the Allen-Bradley Logix Driver.

You can see the configuration in the capture below

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4

Try changing your OPC data mode to "Read", and make sure the group contains OPC items and not existing OPC tags that you dragged in.

2 Likes
5

Ok, thank you. I will try like this.

I didn't know it make a difference to create the item inside the Transaction Group vs drag an existing tag.