which PFC Firmware is this? -check with wbm
check...taskinfo online check plcshell - plcload
...and reduce the load of the plc
we need plclog cat /tmp/codesyscontrol.log or cat /var/codesys/codesyscontrol.log depend on which runtime version you use for the error situation
security related..since SP19 not hardware based
due security reason files could only be accessed in /var/opt/codesys/PlcLogic directory
check the plclogger and use top or htop in by ssh ( which runtime version is this?)
which MQTT lib version is this?