Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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2 OPR CONTROL
2.2 Machine OPR
Stopper method 3
The following shows an operation overview of the stopper method 3, one of the OPR methods.
Stopper method 3 is useful for a system in which a near-point dog cannot be installed. (Note that the workpiece starts traveling
at the speed set in [Pr.47] Creep speed, which means that it takes some time until the machine OPR is completed.)
Operation chart
(1) The machine OPR is started.
(The machine moves at the speed set in [Pr.47] Creep speed in the direction specified in [Pr.44] OPR direction. The torque must be limited for this
operation. Otherwise the servomotor may be damaged in step (2).)
(2) The machine presses the workpiece against the stopper at the speed set in [Pr.47] Creep speed and stops.
(3) 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].)
(4) 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
ON
OFF
OFF
ON
V
0
Pr.47
Pr.55
Md.34
Md.35
Md.20
Md.21
Md.31
Md.31
Md.26
(1) (2)(3)(4)
OPR request flag
OPR complete flag
Torque limit valid range
Creep speed
Torque limit
Zero signal
Stops with a stopper.
Deviation counter clear output
Standby OPR
Standby
Inconsistent
Movement amount
after near-point dog
ON
Inconsistent
A value of the movement amount is stored. OP address
Inconsistent
OPR torque limit value
Current feed value
Torque limit stored
value
Machine feed value
Machine OPR start
(Positioning start signal)
[Y10, Y11, Y12, Y13]
Status: b3
Status: b4
Axis operation status
Deviation counter clear signal
output time