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MELSEC-A
12 CONTROL AUXILIARY FUNCTIONS
12.3.4 Follow up processing function
Follow up processing monitors the rotation amount (real current value) of the motor in
a servo OFF status and reflects it on the current feed value.
Hence, if the servomotor rotates during servo OFF, the servomotor will not rotate by
the droop pulse value at next servo ON, starting positioning at the stopping position.
The following details will be explained for the "follow up processing function".
(1) Processing execution timing
(2) Setting method
(1) Processing execution timing
The timing of follow up processing execution is shown below.
Servo ON/OFF status
All axes servo ON signal [Y15]
Follow up processing execution
0
OFF
ON
OFF
ON
Servo error
occurrence
Cd.100
Servo OFF command
(2) Setting method
Setting is not necessary for execution of the follow up processing function.
It is executed during servo OFF all the time.
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