Structured Text Programming: questions, answers and hands-on experience from automation engineers on TII.
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Saranya
recruiter · 2mo ago
PLC Running But HMI shows communication Error- How will You troubleshoot?
In a production plant, a machine suddenly stops working. The PLC CPU is in RUN mode, but the HMI displays: "Communication Error – PLC Not Responding" The Ethernet cable connection looks normal.
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