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MELSEC-
A
5 DATA USED FOR POSITIONING CONTROL
[Table 1]
Pr.11
setting value
Pr.1
setting value
Value set with peripheral device
(unit)
Value set with sequence program
(unit)
0 : Standard mode
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 : pulse 0 to 2147483647 (pulse) 0 to 2147483647 (pulse)
1 : Stepping motor
mode
0 : mm
0 to 13421772.7 (
m)
0 to 134217727 (
10
-1
m)
1 : inch 0 to 1342.17727 (inch)
0 to 134217727 (
10
-5
inch)
2 : degree 0 to 1342.17727 (degree)
0 to 134217727 (
10
-5
degree)
3 : pulse 0 to 134217727 (pulse) 0 to 134217727 (pulse)
: Tb=300ms
: Vc=1kpulse/s
t
: t = Tb
Vz
Vp
: Vp=200kpulse/s
: Vz=10kpulse/s
300
10
10
3
200
10
3
10
10
3
2000
=
=
75 100
Example for setting " Pr.52 Setting for the movement amount after near-point dog ON"
When " Pr.7 Speed limit value" is set to 200kpulse/s, "
Pr.48 Zero point return speed" is set to 10kpulse/s, "
Pr.49 Creep
speed" is set to 1kpulse/s and the deceleration time is set to 300ms, " Pr.52 Setting for the movement amount after near-point
dog ON" is calculated as shown below.
[Machine zero point return operation]
Speed limit value
Pr.7
Zero point return speed
Pr.48
[Deceleration
distance]
Creep speed
Pr.49
Actual decel-
eration time
Deceleration time
* Set 175 or more for " Setting for the movement
amount after near-point dog ON"
Pr.52
Movement amount for 10ms
at zero point return speed
=
1
2
Vz
1000
t
0.01
Vz
Tb
Vz
Vp
=
Vz
2000
0.01
Vz
0.01
10 10
3
=
175
Pr.53
Zero point return acceleration time selection
Set which of "acceleration time 0 to 3" to use for the acceleration time during zero
point return.
0 : Use the value set in "
Pr.8 Acceleration time 0".
1 : Use the value set in "
Pr.26 Acceleration time 1".
2 : Use the value set in "
Pr.27 Acceleration time 2".
3 : Use the value set in "
Pr.28 Acceleration time 3".
Pr.54
Zero point return deceleration time selection
Set which of "deceleration time 0 to 3" to use for the deceleration time during zero
point return.
0 : Use the value set in "
Pr.9 Deceleration time 0".
1 : Use the value set in "
Pr.29 Deceleration time 1".
2 : Use the value set in "
Pr.30 Deceleration time 2".
3 : Use the value set in "
Pr.31 Deceleration time 3".