Automation Professionals' EtherNet/IP Communication Suite V2

[pturmel]

@konstantinetg

If I keep the lower-level (nested) structures within ~1800 bytes, would that help improve performance?

Yes, that will suffice. Minor hit for the extra path segment in the request, but probably not noticeable.

@konstantinetg

load factor measurements

There is a great deal of ambiguity (and bugs) in the various flavors of load measurement. This is what I recommend:

Siemens Enhanced driver, slow browsing and slow update rate

A technique I find helpful when comms performance varies is to use a fast-changing tag in the PLC (I tend to use a GSV to retrieve WallClock currentValue, a microsecond clock) and subscribe to it in Ignition. The ladder that updates the tag should run faster than the fastest poll rate you are attempting to achieve. This yields a valueChange for every poll cycle. Adjacent to the Ignition tag, add a memory tag of type Int8 and use a valueChange script on the OPC tag that looks something like th…