Stopper Method 3 - Mitsubishi Electric MELSEC iQ-R-RD75P4 User Manual

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
Zero signal
Torque limit
Machine OPR start
(Positioning start signal)
[Y10, Y11, Y12, Y13]
OPR request flag
Md.31
Status: b3
OPR complete flag
Md.31
Status: b4
Deviation counter clear output
Md.26
Axis operation status
Movement amount
after near-point dog
Md.34
ON
Md.20
Current feed value
Md.21 Machine feed value
Torque limit stored
Md.35
value
(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.
2 OPR CONTROL
50
2.2 Machine OPR
V
Pr.47
(1)
Torque limit valid range
ON
OFF
ON
OFF
OFF
Standby OPR
0
Inconsistent
A value of the movement amount is stored.
Inconsistent
OPR torque limit value
Inconsistent
Creep speed
Stops with a stopper.
(2)(3)(4)
ON
Deviation counter clear signal
Pr.55
output time
Standby
OP address
t