Mitsubishi A1SD75M1, User Manual

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8 - 13
MELSEC-A
8 ZERO POINT RETURN CONTROL
(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)".
t
Zero point
return speed
V
Machine zero point return start
(Positioning start signal)
ON
OFF
ON
OFF
OFF
Standing by In zero point return
Inconsistent 0
Inconsistent
Value the machine moved is stored
Near-point dog
ON
OFF
In error
Address at stop
Pr.48
Creep speed
Pr.49
Movement amount after
near-point dog ON Md.44
Current feed value
Machine feed value
Md.29
Md.30
Axis operation status Md.35
Zero point return request flag
[ Status: b3]
Md.40
Zero point
Setting for the movement amount
after near-point dog ON
Pr.52
Zero point return complete flag
[ Status: b4] Md.40
Fig. 8.7 Operation performed when the zero point is not passed in the count method 1)
(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.