Yaskawa MP920 User's Manual Design - Manual (Page 512)

12 Troubleshooting
12.3.2 Processing Flow When a Motion Error Occurs
12-22
„ Motion Parameter: Alarm IL††22 Details
The following tables lists the axis alarm flags (IL††22).
Parameter No. Contents Remedy
b0: Not used
b1: OTF Positive Overtravel
• Servo Amp overtravel in the positive direction detected
(P_OT signal ON)
b2: OTR Negative Overtravel
• Servo Amp overtravel in the negative direction detected
(N_OT signal ON)
b3: SOTF Positive Software Limit
• Machine movement toward the positive software limit range
detected
b4: SOTR Negative Software Limit
• Machine movement toward the negative software limit range
detected
b5: Not used
b6: TIMEOVER Positioning Time Exceeded
• Positioning was not completed in the time set at OW††34:
Positioning Complete Check Time after distribution.
b7: Not used
b8: Not used
b9: Not used
b10: MODERR Control Mode Error
• A Position Control Mode motion command is used in a mode
other than position control.
b11: ZSET_NRDY Zero Point Not Set
• When an Absolute Encoder was used, the zero point is not set
and a move was executed without a set zero point.
b12: Not used
b13: Not used
b14: Not used
b15: Not used
b16: Not used
b17: ABS Encoder Rotation Count Over
• The number of ABS encoder rotations exceeded the range of
the MP920.
b18: PGLEFT Broken PG Wiring
• Broken PG wiring was detected when the A/B mode was
selected as a pulse calculation mode.
b19 to b31: Not used