
11.TROUBLESHOOTING B-63945EN/02
- 632 -
Alarm number Contents Faulty location/corrective action
PC501 NC/PMC INTERFACE ERR
PATHn
The read or write operation
between CNC and PMC failed.
Contact us with information on the
circumstances under which the alarm
occurred (displayed message, system
configuration, operation suspected of
causing the alarm, timing of alarm
occurrence, frequency of occurrence, etc.).
PC502 LADDER SUBaaa (PMCn) The sequence program uses the
SUBaaa functional instruction
that is not supported in PMCn.
Correct the sequence program so that the
SUBaaa functional instruction will not be
used.