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MELSEC-A
9 MAIN POSITIONING CONTROL
9.1.5 Control unit "degree" handling
When the control unit is set to "degree", the following items differ from when other
control units are set.
(1) Current feed value and machine feed value addresses
When the control method is the absolute system, " Md.29 Current feed value"
becomes the ring address of 0 to 359.99999°.
(If the control method is the absolute system, the address of " Md.30 Machine
feed value" does not become the ring address.)
0°
0°
0°
359.99999°
359.99999°
(2) Positioning control method when the control unit is set to "degree"
(a) Absolute system
1) When the software stroke limit is invalid
Positioning is carried out in the nearest direction to the designated
address, using the current value as a reference.
(This is called "shortcut control".)
Example
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°.
315°
45°
315°
45°
Moved from 315° to 45°
Moved from 45° to 315°
POINT
To make the software stroke limit invalid, set to
[Software stroke limit upper limit value = Software stroke limit lower limit value].
Summary of Contents for A1SD75M1
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Page 27: ...1 5 MELSEC A 1 PRODUCT OUTLINE MEMO...
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Page 52: ...2 10 MELSEC A 2 SYSTEM CONFIGURATION MEMO...
Page 111: ...5 21 MELSEC A 5 DATA USED FOR POSITIONING CONTROL MEMO...
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Page 332: ...7 18 MELSEC A 7 MEMORY CONFIGURATION AND DATA PROCESS MEMO...
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Page 446: ...10 24 MELSEC A 10 ADVANCED POSITIONING CONTROL MEMO...
Page 472: ...11 26 MELSEC A 11 MANUAL CONTROL MEMO...
Page 576: ...12 104 MELSEC A 12 CONTROL AUXILIARY FUNCTIONS MEMO...
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