Mitsubishi MELSEC-A series - Page 35

3. SPECIFICATIONS /MELSEC-A
1 turn of PG
- +
~
(b) Stop and dwell timer time-out
The sequence of events is as follows (See Fig. 3.13-1 1:
0 Zeroing signal received - move in appropriate direction.
0 ”Zeroing dog“ on - start decceleration to creep speed and
0 Work is stopped by mechanical stopper.
0 Dwell timer times out - zeroing complete.
start dwell timer.
(c) Stop and signal from drive unit
The sequence of events is as follows (See Fig. 3.13-2):
0 Zeroing signal received- move in appropriate direction.
0 “Zeroing dog“ on - start decceleration to creep speed.
0 Work is stopped by mechanical stopper.
0 Feedback signal from drive unit (e.g. torque limit exceeded),
zeroing complete. (The feedback signal is fed into the zero-
phase signal input).
Zeroing speed
Actuator signal starts deceleration.
Creep speed
Mechanical stop
1
Fig. 3.13 Home Positioning Using Stop Signal
(3) Zeroing address
0 This address is set as the present value of the home position
0 Set the zeroing address to either the upper or lower stroke
upon completion of zeroing.
limit set in the parameters.
(4) Zeroing speed
0 Sets the zeroing speed. (Refer to Fig. 3.14.)
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IB INAI 66101-C