Mitsubishi A1SD75M3 User Manual page 347

8 ZERO POINT RETURN CONTROL
Zero point
Machine zero point return start
(Positioning start signal)
Zero point return request flag
[ Status: b3]
Md.40
Zero point return complete flag
[ Status: b4]
Md.40
Md.35
Axis operation status
Md.44
Movement amount after
near-point dog ON
Md.29
Current feed value
Md.30
Machine feed value
Fig. 8.7 Operation performed when the zero point is not passed in the count method 1)
(4) If the zero point has never been passed from a machine zero point return start
until the machine moves the movement amount set to " Pr.52 Setting for the
movement amount after near-point dog ON" after the near-point dog ON, an
error "zero point not pass at zero point return" (error code: 210) occurs and the
machine decelerates to a stop.
In the system where the distance between the machine zero point return
starting position and zero point is too short to detect the zero point, select the
zero point return method (5): "count method 3)".
OFF
OFF
OFF
Standing by
Inconsistent
Inconsistent
(5) If the restart command is turned ON after the machine zero point return is
stopped by the stop signal, an error "zero point return restart not possible"
(error code: 209) occurs.
REMARK
•
In the "count method 1)" zero point return method, a machine zero point return
can be made while the near-point dog is ON.
•
In the "count method 1)" zero point return method, a continuous start can be
made after completion of a machine zero point return.
V
Pr.48 Zero point
return speed
ON
Near-point dog
OFF
ON
ON
In zero point return
0
Value the machine moved is stored
8 - 13
MELSEC-A
Setting for the movement amount
Pr.52
after near-point dog ON
Creep speed
Pr.49
t
In error
Address at stop