Opr Method (3): Stopper Method 2) - Mitsubishi Electric MELSEC-L LD75P User Manual

8.2.5

OPR method (3): Stopper method 2)

The following shows an operation outline of the "stopper method 2)" OPR method.
(1) Operation chart
1.
The machine OPR is started. (The machine begins the acceleration designated in "[Pr.51] OPR
acceleration time selection", in the direction designated in "[Pr.44] OPR direction". It then moves
at the "[Pr.46] OPR speed" when the acceleration is completed.)
2.
The machine begins decelerating when the near-point dog ON is detected.
3.
The machine decelerates to the "[Pr.47] Creep speed", and subsequently moves at that speed.
(Torque limiting is required at this time. If the torque is not limited, the servomotor may fail in step
4).)
4.
The machine presses against the stopper at the creep speed and stops.
5.
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].)
6.
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.
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 after
Md.34
near-point dog ON
Current feed value
Md.20
Machine feed value
Md.21
Torque limit stored value
Md.35
V
OPR speed
Pr.46
1. 2.
Zero signal
Torque limit
ON
Near-point dog
OFF
ON
OFF
ON
OFF
OFF
Standing by In OPR
0
Inconsistent
Inconsistent Value the machine moved is stored
Inconsistent Torque limit setting value
CHAPTER 8 OPR CONTROL
Creep speed
Pr.47
Stops at stopper
t
3. 4. 5. 6.
Valid torque limit range
ON
Deviation counter clear
Pr.55
signal output time
Standing by
OP address
OPR torque limit value
8
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