29 POSITIONING CONTROL FUNCTION
29.4 Auxiliary Function
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29
29.4 Auxiliary Function
This section describes auxiliary functions of the positioning.
Dog search function
If the forward rotation limit and the reverse rotation limit are used, the DOG search function can be used for OPR. (Page
370 Forward limit and reverse limit) The OPR operation depends on the OPR start position.
(1) If the start position is before the near-point dog:
1. When the DSZR/DDSZR instruction is executed, OPR will be started.
2. Transfer operation will be started in the OPR direction at the OPR speed.
3. If the front end of the near-point dog is detected, the speed will be reduced to the creep speed.
4. After detecting the rear end of the near-point dog, if the zero signal is detected for the specified number of times is
detected, the operation will be stopped.
(2) If the start position is in the near-point dog area:
1. When the DSZR/DDSZR instruction is executed, OPR will be started.
2. Transfer operation will be started in the opposite direction of the OPR direction at the OPR speed.
3. If the front end of the near-point dog is detected, the speed will decelerate and the operation will stop. (The workpiece
will come out of the near-point dog area.)
4. Transfer operation will be started in the OPR direction at the OPR speed. (The workpiece will enter the near-point dog
area again.)
5. If the front end of the near-point dog is detected, the speed will be reduced to the creep speed.
6. After detecting the rear end of the near-point dog, if the zero signal is detected for the specified number of times is
detected, the operation will be stopped.
Reverse rotation limit 1
(Reverse limit)
Rear end
Near-point
DOG
Forward end Forward rotation limit 1
(Forward limit)
Creep speed
Operation in
reverse rotation
direction
OPR speed
(4) (3) (2) (1)
Origin
Operation in forward
rotation direction
OPR speed
OPR direction
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