Mitsubishi Electric MELSEC iQ-R RD75P4, Руководство пользователя

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12 DATA USED FOR POSITIONING CONTROL
12.3 Basic Setting
415
12
[Pr.50] Setting for the movement amount after near-point dog ON
When the OPR method is count method 1 or 2, set the movement amount from the position where the near-point dog signal
turns on to the OP.
(Set the value for the movement amount after near-point dog ON to a value 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".)
■
Buffer memory address
The following table shows the buffer memory address of this area.
■
Setting range
The setting range depends on the setting of [Pr.1] Unit setting.
*1 When this buffer memory area is set with programs, a calculation is performed in the RD75 to convert a setting value to the value in
each unit. For setting this buffer memory area, take the value after the unit conversion into consideration.
■
Default value
The default value is 0 for all the axes.
Buffer memory name Axis 1 Axis 2 Axis 3 Axis 4
[Pr.50] Setting for the movement amount after near-point dog ON 80 230 380 530
81 231 381 531
Setting of [Pr.1] Unit setting Setting value with engineering tools Setting value with programs
*1
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
inches)
2: degree 0 to 21474.83647 (degree) 0 to 2147483647 (

10
-5
degrees)
3: pulse 0 to 2147483647 (pulse) 0 to 2147483647 (pulse)
Pr.47
Pr.8
Pr.46
t
Deceleration time: Tb = 300ms
Creep speed: Vc = 1kpulse/s
Movement amount for 10ms
at OPR speed
Set the value equal to or larger than 175 to
Pr.50 Setting for the movement amount
after near-point dog ON.
Speed limit value: Vp = 200kpulse/s
OPR speed: Vz = 10kpulse/s
Assuming that Pr.8 Speed limit value is set to 200kpulse/s, Pr.46 OPR speed to 10kpulse/s, Pr.47 Creep speed to 1kpulse/s,
and the deceleration time to 300ms, the value of Pr.50 Setting for the movement amount after near-point dog ON is calculated as
follows:
[Machine OPR operation]
[Deceleration distance]
t = Tb × Actual deceleration time:
Vz
Vp
× t + 0.01 × Vz × =
1
2
= × + 0.01 × Vz
= × + 0.01 × 10 × 10
3
= 75 + 100
= 175
Vz
1000
Tb × Vz
Vp
Vz
2000
300 × 10 × 10
3
200 × 10
3
10 × 10
3
2000
Setting example for Pr.50 Setting for the movement amount after near-point dog ON