SFC Charts, Sleep Timers, and Threads

Ignition
1

Finally found a project that I get to explore SFC charts a bit more and have a question for those who may have explored a bit deeper than I have so far. Building some charts to manage a Test stations sequence for calling sequences of WebAPI calls. In some cases I need to keep polling until my data set is built or the test completed.

Is it safe to use sleep timers in the SFC chart? Or is there a better way to handle this? I don't want to overload the webserver sending too many requests, but I also know sleep timers can cause bottlenecks elsewhere in Ignition. There should only be 2 instances of this chart running maximum at any given time on the gateway.

Thanks in advance!

2

Hi,

Here is an excerpt from our user manual page that goes over pitfalls of using sleep timers and reasons to avoid them:
Adding a Delay to a Script - Reasons to Avoid time.sleep and While Loops

I think you might find SFC Elements - Timer helpful. As a bonus, there is a nifty Inductive University video that supplements the information in the SFC Elements page.
I would also recommend watching the other SFC videos on Inductive University to bolster your knowledge.

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