356
(3) Positioning control method when the control unit is set to "degree"
(a) When the software stroke limit is invalid in absolute system
Positioning is carried out in the nearest direction to the designated address, using the current value as a
reference.
(This is called "shortcut control".)
(Examples)
• To specify the positioning direction (not carrying out the shortcut control), use "[Cd.40] ABS direction in
degrees" or "[Da.28] ABS direction in degrees". This function can be performed when the software stroke
limit is invalid. When the software stroke limit is valid, an error "Illegal setting of ABS direction in unit of
degree" (error code: 546) occurs and positioning is not started. In "[Cd.40] ABS direction in degrees" or
"[Da.28] ABS direction in degrees", the set value for the reference axis is applied to both the reference axis
and interpolation axis. Even if a unit other than degree is set for the reference axis, the setting of the
reference axis is applied to the interpolation axis as shown below (for 3-axis linear interpolation control
(ABS3)).
1) Positioning is carried out in a clockwise direction when the current value is moved from 315 to 45
.
2) Positioning is carried out in a counterclockwise direction when the current value is moved from 45 to 315
.
Moved from 315 to 45
Moved from 45 to 315
Axis
Unit setting
[Cd.40] ABS direction in degrees
Rotation direction of the axis
with degree setting
Reference axis
pulse
1: ABS clockwise
0
Interpolation axis 1
degree
1: ABS clockwise
Interpolation axis 2
degree
1: ABS clockwise
315°
45°
315°
45°
Содержание MELSEC-L LD75D
Страница 1: ...MELSEC L LD75P LD75D Positioning Module User s Manual LD75P1 LD75P2 LD75P4 LD75D1 LD75D2 LD75D4 ...
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Страница 47: ...45 CHAPTER 2 SYSTEM CONFIGURATION 2 2 1 General Image of System 1 When connected to a CPU module ...
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Страница 267: ...265 CHAPTER 6 PROGRAM USED FOR POSITIONING CONTROL 6 6 4 Positioning Program Examples ...
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Страница 272: ...270 Z ABRST1 instruction execution ...
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Страница 316: ...314 Memo ...
Страница 685: ...683 APPENDICES A Appendix 1 Function Update Appendix 1 1 Function comparison Memo ...
Страница 738: ...736 Memo ...
Страница 806: ...804 5 LD75D2 Unit mm 6 LD75D4 Unit mm 45 4 90 4 95 4 45 45 DIN rail center 45 4 90 4 95 4 45 45 DIN rail center ...
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