I thought I posted something ages ago but I can't find it now. Having some trouble with modbus IP.
Symptoms, basically some points stop reading and some work fine.
-analog trends have perfectly flat graphs that never change.
-digital alarms don't work.
-under point properties the refresh time is observed as being zero and never changes. (see attached picture)
-points that are frozen like this just deceptively remain at their last read value.
-modscan32 reads the equipment just fine while this is happening.
-after a power cycle or zap on the module all the above troubles go away, for a while. Sometimes works fine for hours or days but eventually some points stop working.
-while this happens there are plenty of points that work fine too. Plenty of sites that don't have the problem at all as well.
I don't see any evidence I recognize in the modstat, the last modbusIP status is generally connection made error 0.
Generally the IP point counts are fairly low like 20-60 somewhere which means the program execution rates are generally up in the thousands so it isn't like we are overloading the module.
I have OEMctrl working on this for a long time now. We have replicated the problem in our lab using modsim32.