Mitsubishi Electric MELSEC-L LD75P User Manual page 151

(2) [Pr.50] Setting for the movement amount after near-point dog ON
When using the count method 1) or 2), set the movement amount to the OP after the near-point dog signal turns
ON.
(The movement amount after near-point dog ON should be equal to or greater than the sum of the "distance
covered by the deceleration from the OPR speed to the creep speed" and "distance of movement in 10ms at the
OPR speed".)
(a) Setting range
[Pr.1] setting value
0: mm
1: inch
2: degree
3: pulse
Example of setting for " Pr. 50 Setting for the movement amount after near-point dog ON"
Assuming that the " Pr. 8 Speed limit value" is set to 200 kpulse/s, " Pr. 46 OPR speed" to 10 kpulse/s,
" Pr. 47 Creep speed" to 1 kpulse/s, and deceleration time to 300 ms, the minimum value of " Pr. 50 Setting for the
movement amount after near-point dog ON" is calculated as follows:
[Machine OPR operation]
Pr.8 Speed limit value: Vp=200kpulse/s
Pr.46 OPR speed:
Vz=10kpulse/s
Actual deceleration time:t = Tb
(3) [Pr.51] OPR acceleration time selection
Set which of "acceleration time 0 to 3" to use for the acceleration time during OPR.
0: Use the value set in "[Pr.9] Acceleration time 0".
1: Use the value set in "[Pr.25] Acceleration time 1".
2: Use the value set in "[Pr.26] Acceleration time 2".
3: Use the value set in "[Pr.27] Acceleration time 3".
(4) [Pr.52] OPR deceleration time selection
Set which of "deceleration time 0 to 3" to use for the deceleration time during OPR.
0: Use the value set in "[Pr.10] Deceleration time 0".
1: Use the value set in "[Pr.28] Deceleration time 1".
2: Use the value set in "[Pr.29] Deceleration time 2".
3: Use the value set in "[Pr.30] Deceleration time 3".
Value set with GX Works2 (unit)
0 to 214748364.7 (m)
0 to 21474.83647 (inch)
0 to 21474.83647 (degree)
0 to 2147483647 (pulse)
[Deceleration distance] =
Pr.47 Creep speed: Vc=1kpulse/s
Vz
t
Vp
Deceleration time: Tb=300ms
CHAPTER 5 DATA USED FOR POSITIONING CONTROL
Value set with program (unit)
-1
m)
0 to 2147483647 (10
-5
0 to 2147483647 (10 inch)
-5
0 to 2147483647 (10 degree)
0 to 2147483647 (pulse)
1 Vz
t + 0.01
2 1000
Movement amount for
10ms at OPR speed
Vz Tb Vz
+ 0.01
=
2000 Vp
3
10 10 300 10 10
=
2000 200 10
3
= 75 + 100
= 175
Setting for the movement amount after
near-point dog ON ( Pr. 50 ) should be
equal to or larger than 175.
5
Vz
Vz
3
3
+ 0.01 10 10
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