When are transaction groups the best solution?

[pturmel]

Perhaps you are ready for the rabbit hole. Start here:

[SOLVED] Are tag Value Changed scripts running asynchronously?

If it absolutely has to be a tag event, consider calling into a script module that will submit the event to a java concurrent queue, then run a timer event with a dedicated thread to drain the queue and loop through the queued events.

Then this:

Java concurrent queue for tag change scripts

Continuing the discussion from [SOLVED] Are tag Value Changed scripts running asynchronously?: We've got code in our standard library that I need to log a value change on a tag and then associate various data points with that value change. The value is located in a UDT, and because this is part of our "standard" library we use for our customers, the number of tags is variable and quite possibly numerous so having a gateway tag event script isn't feasible for this solution. I was reading up on …

And this:

Modbus Slave/Server to Generate Read Only Tags

I've create a generic "Modbus Publish" script that eliminates the need for a second set of tags. I've publicly posted it here: https://www.automation-pros.com/ignition/modbusPublish.py It requires the "Queue Utility" script posted here: https://www.automation-pros.com/ignition/queueUtil.py and described over here: Both scripts rely on my Integration Toolkit's globalVarMap() script function, but you can rework that (not quite 1:1) to use system.util.getGlobals() if you must. (Not recomme…

And finally this:

Automation Professionals' Integration Toolkit Module

Meanwhile.... Automation Professionals is pleased to announce a BETA release of this module, with a significant new feature: Tag Actors. For Ignition v8.1+: v2.1.0.250841756 The details of the new functionality are in the freshly updated documentation, under Tag Actors. The Republish action provides a built-in alternative to the Modbus Publishing algorithm I recommend over here: The Republish action can also be used with expression tags to revive the old OPC writeback functionality, witho…