
B-63945EN/02 9.DIGITAL SERVO
- 531 -
9.3.8 Others
An alarm is identified from the data of alarm 5. The meaning of each
bit is indicated below.
Alarm 5
OFS MCC LDM PMS FAN DAL ABF
Description Action
1 Feedback mismatch alarm 1
1 Semi-closed/closed loop excessive error alarm 2
1 Current offset error alarm 3
Action 1:
This alarm is issued when the move direction of the position
detector becomes opposite to the move direction of the speed
detector. Check the rotation direction of the separate detector. If
the rotation direction of the separate detector is opposite to the
rotation direction of the motor, take the following action:
For the A/B phase detector:
Exchange the connections of A and A with each other.
For the serial detector:
Reverse the signal direction setting of the separate detector.
Even with the A/B phase detector, the signal direction can be
reversed by setting the parameter below. (This method cannot be
used when absolute position communication is required.)
#7 #6 #5 #4 #3 #2 #1 #0
2018 RVRSE
#0 RVRSE Whether to reverse the signal direction of the separate detector can be
set.
0: Does not reverse the signal direction of the separate detector.
1: Reverses the signal direction of the separate detector.
If there is a large twist between the motor and separate detector, this
alarm may be issued in abrupt acceleration/deceleration. In such a case,
change the detection level.
#7 #6 #5 #4 #3 #2 #1 #0
2201 RNLV
#1 RNLV The detection level of a feedback mismatch alarm can be changed.
1: Detected at 1000 min
-1
or more
0: Detected at 600 mm
-1
or more
Action 2:
This alarm is issued when the difference between the motor
position and separate detector position exceeds the
semi-closed/closed loop excessive error level. Check if the dual
position feedback conversion coefficient is set correctly. If the
dual position feedback conversion coefficient is set correctly,