Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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2 OPR CONTROL
2.2 Machine OPR
Count method 1
The following shows an operation overview of Count method 1, one of the OPR methods. If a machine OPR operation is
started using Count method 1 from a point where the near-point dog is on, the machine moves in the direction reverse to the
OPR direction to go back to a point where the near-point dog turns off, and a normal machine OPR operation is performed.
The machine OPR can be performed using Count method 1 even in the following situations.
• Where the near-point dog is on
• After the machine OPR is completed
Operation chart
(1) The machine OPR is started.
(The machine starts accelerating according to the setting of [Pr.51] OPR acceleration time selection in the direction specified in [Pr.44] OPR direction, and
moves at the speed set in [Pr.46] OPR speed when the acceleration is completed.)
(2) When the on state of the near-point dog is detected, the machine starts decelerating.
(3) The machine decelerates to the speed set in [Pr.47] Creep speed and moves at the creep speed after that.
(4) When the first zero signal is detected after the axis has traveled the movement amount set in [Pr.50] Setting for the movement amount after near-point dog
ON from the point where the near-point dog is turned on, the RD75 stops outputting pulses and produces Deviation counter clear output to the drive unit.
(Deviation counter clear signal output time is set in [Pr.55].)
(5) After Deviation counter clear output is completed, OPR complete flag ([Md.31] Status: b4) turns on and OPR request flag ([Md.31] Status: b3) turns off.
t
ON
OFF
OFF
OFF
ON
0
V
ON
OFF
Md.31
Md.31
Md.34
Md.20
Md.21
Pr.46
Pr.47
Md.34
Pr.50
Pr.55
ON
Md.26
(1) (2) (3) (4)(5)
OPR speed
Standby OPR Standby
Inconsistent
Movement amount
after near-point dog
ON
Inconsistent
A value of the movement amount is stored. OP address
Current feed value
Zero signal
Value of *1
Deviation counter clear output
Movement amount after near-point dog ON
*1
Near-point dog
Creep speed
OPR request flag
OPR complete flag
Machine feed value
Setting for the movement amount
after near-point dog ON
Have sufficient distance from the OP position
to the near-point dog OFF.
Adjust the setting so that the object position after traveling
of the set movement amount after near-point dog ON is as
close as possible to the center of the zero signal HIGH level.
If the position overlaps with Zero signal, the machine OPR
stop position may deviate by one servomotor rotation.
One servomotor rotation
Deviation counter clear signal output time
Machine OPR start
(Positioning start signal)
[Y10, Y11, Y12, Y13]
Status: b3
Status: b4
Axis operation status
First zero signal after the object traveling of
the movement amount set to Pr.50 Setting
for the movement amount after near-point
dog ON