A practical troubleshooting guide for Yokogawa CENTUM VP and Exaopc integration, covering OPC Classic and UA architectures, tag quality diagnostics, and control system data flow.
A practical ICS cybersecurity FAQ on Purdue Model zones, OT network segmentation, OPC UA hardening, secure remote access, and recovery planning for GE and Bachmann environments.
Trace frozen OPC tags in ABB 800xA and GE PACSystems by checking source values, item paths, timestamps, scan groups, deadband, and controller communication load.
Reduce nuisance alarms with ISA-18.2 principles: rationalize operator actions, tune priority and deadband, control shelving, and verify OPC UA alarm event routing.
The link light is green, but OPC tags have stopped updating. Check PLC address mapping, scan and subscription rates, and communication load before blaming the network.
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