Delta ASDA-A3 Series User Manual page 1149

Troubleshooting
There are five types of alarms: General, STO, Communication, Motion control, and Third-party
communication. The detailed information is as follows.
General type: alarms caused by signal errors of the hardware or encoder.
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STO type: alarms caused by STO errors.
Communication type: alarms caused by CANopen, DMCNET, or EtherCAT communication
Motion control type: alarms caused by motion control command (in PR mode) errors.
Third-party communication type: alarms caused by errors of third-party encoders (Mitutoyo,
AL.nnn is the alarm format on the 7-segment display.
If the recommended alarm clearing method is DI.ARST, set DI.ARST (alarm reset) to On or
P0.001 to 1 for clearing the alarm.
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errors.
BiSS C, EnDat 2.2, Fagor, or Nikon).
ASDA-A3