Fagor alarm 9054: The COM port for MODBUSSVRRS cannot be opened
CNC 8060/8065/8070 CNC error · Fagor 8060/8065/8070
What it means
At PLC compilation, opening the serial port reserved for the Modbus server (MODBUSSVRRS) failed, so serial Modbus slave communication cannot be established. Check that the COM port exists/enabled on the unit and that no other process owns it, then review the port parameterization.
Likely causes
- serial port disabled or not present on hardware config
- another application holding the COM port open
- wrong baud/parity/port settings in MODBUSSVRRS setup
Need the part urgently?
Send us alarm 9054 with your machine details — typical RFQ turnaround is 24–48h.