Mitsubishi Melsec-Q QD75D1, User Manual

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MELSEC-Q
8 OPR CONTROL
8.2.6 OPR method (4): Stopper method 3)
The following shows an operation outline of the "stopper method 3)" OPR method.
The "stopper method 3)" method is effective when a near-point dog has not been installed.
(Note that the operation is carried out from the start at the "
Pr.47 Creep speed", so it will
take some time until the machine OPR completion.)
Operation chart
1)
The machine OPR is started.
(The machine moves at the " Pr.47 Creep speed", in the direction designated in " Pr.44 OPR direction". Torque
limiting is required at this time. If the torque is not limited, the servomotor may fail when the machine presses against
the stopper in step 2.)
2) The machine presses against the stopper at the " Pr.47 Creep speed" and stops.
3)
The pulse output from the QD75 will stop at the zero signal after the machine stops, outputting the "deviation counter
clear output" to the drive unit.
(A "deviation counter clear signal output time" is set in the Pr.55 .)
4)
After a "deviation counter clear output" is output to the drive unit, the OPR complete flag ( Md.31 Status: b4) turns
from OFF to ON, and the OPR request flag ( Md.31 Status: b3) turns from ON to OFF.
t
ON
OFF
ON
OFF OPR request flag
OFF
OPR complete flag
ON
V
Valid torque limit range
Creep speed
Torque limit
Zero signal
Stops at stopper
Deviation counter clear output
Standby OPR
Standby
Inconsistent
0 Movement amount
after near-point dog
ON
Inconsistent
Value the machine moved is stored OP address
Inconsistent
OPR torque limit value
Current feed value
Pr.47
Pr.55
Md.34
Torque limit stored
value
Md.35
Md.20
Md.21
Md.31
Md.31
Md.26
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
1) 2) 3) 4)
Fig. 8.10 Stopper method 3) machine OPR