Opr Method (4): Stopper Method 3) - Mitsubishi Electric MELSEC-L LD75P User Manual

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.)
(1) 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 LD75 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 [Pr.55].)
4.
After a "deviation counter clear signal" 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.
Zero signal
Torque limit
Machine OPR start
(Positioning start signal)
[Y10,Y11,Y12,Y13]
OPR request flag
Status : b3
Md.31
OPR complete flag
Status : b4
Md.31
Deviation counter clear output
Axis operation status
Md.26
Movement amount
Md.34
after near-point dog ON
Md.20 Current feed value
Machine feed value
Md.21
Md.35 Torque limit stored value
330
V
Pr.47
1.
Valid torque limit range
ON
OFF
ON
OFF
OFF
In OPR
Standing by
0
Inconsistent
Value the machine moved is stored
Inconsistent
OPR torque limit value
Inconsistent
Creep speed
Stops at stopper
2. 3. 4.
ON
Deviation counter clear
Pr.55
signal output time
Standing by
OP address
t