Mitsubishi Electric MELSEC-L LD75D, User Manual

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139
CHAPTER 5 DATA USED FOR POSITIONING CONTROL
5
5.
2
List
of
P
a
ramet
e
rs
(11)[Pr.41] Allowable circular interpolation error width
With the "allowable circular interpolation error width", the allowable error range of the calculated arc path and end
point address is set.
*1
If the error of the calculated arc path and end point address is within the set range, circular interpolation will be
carried out to the set end point address while compensating the error with spiral interpolation.
The allowable circular interpolation error width is set in the following axis buffer memory addresses.
• If axis 1 is the reference axis, set in the axis 1 buffer memory address [60, 61].
• If axis 2 is the reference axis, set in the axis 2 buffer memory address [210, 211].
• If axis 3 is the reference axis, set in the axis 3 buffer memory address [360, 361].
• If axis 4 is the reference axis, set in the axis 4 buffer memory address [510, 511].
*1 With circular interpolation control using the center point designation, the arc path calculated with the start point address
and center point address and the end point address may deviate.
(a) Setting range
(12)[Pr.42] External command function selection
Select a command with which the external command signal should be associated.
To enable the external command signal, set the "[Cd.8] External command enable" to "1".
[Pr.1] setting value Value set with GX Works2 (unit) Value set with program (unit)
0: mm 0 to 10000.0 (

m)
0 to 100000 (

10
-1

m)
1: inch 0 to 1.00000 (inch)
0 to 100000 (

10
-5
inch)
2: degree 0 to 1.00000 (degree)
0 to 100000 (

10
-5
degree)
3: pulse 0 to 100000 (pulse) 0 to 100000 (pulse)
[Pr.42] External command
function selection
Description
0: External positioning start The external command signal input is used to start a positioning operation.
1: External speed change
request The external command signal input is used to change the speed in the current positioning operation. The new
speed should be set in the "[Cd.14] New speed value"
2: Speed-position, position-
speed switching request
The external command signal input is used to switch from the speed control to the position control while in the
speed-position switching control mode, or from the position control to the speed control while in the position-
speed switching control mode.
To enable the speed-position switching control, set the "[Cd.24] Speed-position switching enable flag" to "1".
To enable the position-speed switching control, set the "[Cd.26] Position-speed switching enable flag" to "1".
3: Skip request The external command signal input is used skip the current positioning operation.
Path with spiral interpolation
Error
End point address
with calculation
End point address
Start point address Center point address