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Chapter 5 Data Used for Positioning Control
[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 10 ms at the OPR speed".)
Deceleration time: Tb=300 ms
Creep speed: Vc=1 kPLS/s
Actual deceleration time: t = Tb
t
Vz
Vp
Pr.47
Speed limit value: Vp=200 kPLS/s
Pr.8
OPR speed:
Vz=10 kPLS/s
Pr.46
[OPR operation]
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 kPLS/s, " Pr. 46 OPR speed" to 10 kPLS/s,
" Pr. 47 Creep speed" to 1 kPLS/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:
[Deceleration distance] =
1
2
Vz
1000
t + 0.01 Vz
Movement amount for
10ms at OPR speed.
=
Tb Vz
Vp
+ 0.01 Vz
Vz
2000
=
300 10 10
200 10
10 10
2000
3 3
3
+ 0.01 10 10
3
= 75 + 100
= 175
: " Setting for the movement amount
after near-point dog ON" should be equal to
or larger than 175.
Pr.50
[Pr.1] setting value
Value set with GX Works2
(unit)
Value set with sequence program
(unit)
0 : mm
0 to 214748364.7 (
m)
0 to 2147483647 (
10
-1
m)
1 : inch 0 to 21474.83647 (inch)
0 to 2147483647 (
10
-5
inch)
2 : degree 0 to 21474.83647 (degree)
0 to 2147483647 (
10
-5
degree)
3 : PLS 0 to 2147483647 (PLS) 0 to 2147483647 (PLS)
[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".