Yaskawa DR2 Sigma Servo - Manual (Page 198)

4.2 Using the Functions
185
3) The table below lists the alarms displayed in the alarm trace-back mode.
Displayed Alarm
Code
Description
Absolute data error
User constant breakdown
User constant setting error
Overcurrent
Blown fuse
Regenerative error
Position error pulse overflow (for position control only)
Overvoltage
Overspeed
Overload
Absolute encoder error
Absolute encoder back-up error
Absolute encoder checksum error
Absolute encoder battery error
Absolute encoder data error
Absolute encoder overspeed
Reference input read error
Servo overrun detected (This function prevents (or minimizes)
overrun. )
Encoder output phase error
Incremental encoder initial pulse error
Encoder A-, B-phase disconnection
Encoder C-phase disconnection
External PG A-, B-phase disconnection
External PG C-phase disconnection
Not an alarm. Reset by alarm reset or Servopack power ON.
4