All abnormal shutdowns due to issues with the frozen touchscreen data
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There is a GEA refrigeration unit that has been experiencing abnormal readings recently; the exhaust pressure, exhaust temperature, and motor current all show their maximum values (these are likely the highest values that the PLC can set). This results in the unit shutting down. The manufacturer has inspected it several times and replaced the touch screen, the PLC, and the PLC power supply, but the problem still occurs from time to time. When the PLC power supply is turned off and then restarted, the values displayed on the touch screen return to normal. However, once the unit is started up again, the same problems occur from time to time. I’m not sure what else should be checked
Did the original poster find the reason in the end?