
B--63005EN/02
9.TROUBLESHOOTING
615
Digital servo parameters are abnormal.
(Digital servo parameters are set incorrectly.)
When alarm 315 is occured at the same time, check the cause of alarm 351
of section 9.16.
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” .
This data indicates the cause of servo alarm No. 417, detected by the NC.
If the alarm is detected by the servo, the PRM bit (bit 4 of DGN No. 0203)
is set to 1.
#7
0280
#6
AXS
#5 #4
DIR
#3
PLS
#2
PLC
#1 #0
MOT
#0(MOT) : The motor type specified in parameter No. 2020 falls outside the
predetermined range.
#2(PLC) : The number of velocity feedback pulses per motor revolution, specified in
parameter No. 2023, is zero or less. The value is invalid.
#3(PLS) : The number of position feedback pulses per motor revolution, specifiedin
parameter No. 2024, is zero or less. The value is invalid.
#4(DIR) : The wrong direction of rotation for the motor is specified in parameterNo.
2022 (the value is other than 111 or --111).
#6(AXS) : In parameter No. 1023 (servo axis number), a value that falls outside the
rangeof 1 to the number of controlled axes is specified. (For example, 4 is
specified instead of 3.) Alternatively, the values specified in the
parameter are not consecutive.
9.16
ALARM 417 (DIGITAL
SERVO SYSTEM IS
ABNORMAL)
D Causes