Stopper Method 2 - Mitsubishi Electric MELSEC iQ-R-RD75P4 User Manual

Stopper method 2

The following shows an operation overview of the stopper method 2, one of the OPR methods.
Operation chart
Machine OPR start OFF
(Positioning start signal)
[Y10, Y11, Y12, Y13]
OFF
OPR request flag
Md.31
Status: b3
OPR complete flag
OFF
Md.31
Status: b4
Deviation counter clear output
Md.26
Axis operation status Standby
Movement amount
Md.34
after near-point dog Inconsistent
ON
Md.20 Current feed value
Inconsistent
Md.21
Machine feed value
Torque limit stored
Md.35
Inconsistent
value
(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.
(The torque must be limited for this operation. Otherwise the servomotor may be damaged in step (4).)
(4) The machine presses the workpiece against the stopper at the creep speed and stops.
(5) After the stop and a zero signal is input, 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].)
(6) 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.
V
Pr.46 OPR speed
(1) (2) (3) (4) (5)(6)
Zero signal
Torque limit valid range
Torque limit
ON
Near-point dog OFF
ON
ON
OPR
0
A value of the movement amount is stored.
Torque limit setting value OPR torque limit value
Pr.47 Creep speed
Stops with a stopper.
t
ON
Deviation counter clear signal
Pr.55
output time
Standby
OP address
2
2 OPR CONTROL
47
2.2 Machine OPR