We have a setup using 7.9.10 connecting to a Siemens 317fpn/dp on the PLC:s internal ethernet interface.
The PLC is configured to use 50% of the cpu for communication and the PLC scan cycle time is still below 10ms. So not much load on the PLC because of the plc program.
Twice a day almost on a daily basis we get slow response reading tags in ignition.
The issue remains for about 30 minutes and then it goes back to normal.