
B–63445EN/01
7. TROUBLESHOOTING
169
Digital servo parameters are abnormal.
(Digital servo parameters are set incorrectly.)
When alarm 351 is occured at the same time, check the cause of alarm 351
of Sec. 7.13.
1 Confirm the setting value of the following parameters:
PRM 2020 : Motor format number
PRM 2022 : Motor rotation direction
PRM 2023 : Number of pulses of velocity feedbacks
PRM 2024 : Number of pulses of position feedback
PRM 1023 : Servo axis number
PRM 2084 : Flexible feed gear ratio
PRM 2085 : Flexible feed gear ratio
Confirm the details with diagnosis function of CNC side.
2 Change the setting of this parameter to 0.
PRM 2047 : Observer parameter
3 Perform initial setting of digital servo parameters.
”Refer to setcion 5.1 ”initial setting of servo parameters” .
7.21
ALARM 417 (DIGITAL
SERVO SYSTEM IS
ABNORMAL)
D Causes