Modbus problem ReadHoldingRegisterRequest


We have 77 modbus devices and we are reading about 70.000 tags and sometimes we have some warnings “ReadHoldningRegistersRequest” and “TimeoutDaemon”.

What can be the problem?

Thank you,

These happen when a response to a request isn’t received within the configured timeout.

It looks like you might be experiencing these for multiple devices at once, which would suggest some kind of temporary network interruption or something like that.

Or a java pause-the-world. What version of Ignition is this, and is it using G1GC?


We are using Ignition 7.9.7. and the garbage collector are:


Yeah, search this forum for “G1GC” for lots of suggestions, many from me. (-: