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318
Present Position Preset
Section 8-3
Axis Operating Output Memory Areas (Operating Commands)
a = Beginning word of Axis Operating Output Areas specified in Common
Para (Axis No.
−
1)
×
25
Present position preset is performed according to the position command value
set in the Axis Operating Output Memory Area and started when the
PRESENT POSITION PRESET Bit turns ON.
Execute PRESENT POSITION PRESET when the Busy Flag for the corre-
sponding axis is OFF. If PRESENT POSITION PRESET is executed while the
axis's Busy Flag is ON, a Multistart Error (axis error code: 3050) will occur
and PRESENT POSITION PRESET will not be executed. When executing
PRESENT POSITION PRESET, make sure that the PRESENT POSITION
PRESET Bit will remain ON until the Busy Flag turns ON.
Axis Operating Input Memory Areas (Monitor)
b = Beginning word of Axis Operating Input Areas specified in Common
Para (Axis No.
−
1)
×
25
Timing Chart
In the following timing chart, the present position is changed to “0.” When the
present position changes to “0,” that position becomes the origin, so the Ori-
gin Stop Flag turns ON. The status of the PCU Positioning Completed Flag
(word b, bit 05) does not change.
Name
Word
Bits
Contents
PRESENT POSITION
PRESET
a
08
0
→
1: Starts present position preset
Position command value
a+2
a+3
---
Position command value (rightmost
word)
Position command value (leftmost
word)
Unit: Command unit
Command range:
−
2,147,483,648 to
2,147,483,647 (80000000 hex to
7FFFFFFF hex)
Name
Word
Bits
Contents
No Origin Flag
b
06
0: Origin established.
1: No origin established.
Origin Stop Flag
07
0: Outside origin range.
1: Within origin range.
Error Flag
12
0: No axis error.
1: Axis error.
Busy Flag
13
1: Axis busy (axis operation executing).
Feedback present posi-
tion
b+6
b+7
---
Present position:
Feedback present position (rightmost
word)
Feedback present position (leftmost
word)
Command present posi-
tion
b+8
b+9
---
Present position:
Command position (rightmost word)
Command position (leftmost word)
Summary of Contents for CJ1W-NC271 - 12-2009
Page 2: ......
Page 4: ...iv ...
Page 6: ...vi ...
Page 22: ...xxii ...
Page 58: ...30 Starting Operation Section 2 2 ...
Page 244: ...216 Axis Operating Input Memory Areas Section 4 8 ...
Page 264: ...236 Transferring Servo Parameters Section 5 3 ...
Page 396: ...368 Linear Interpolation Section 9 7 ...
Page 648: ...620 List of Error Codes Appendix D ...
Page 674: ...646 Additional Functions for the CJ1W NCF71 MA Appendix F ...
Page 684: ...656 Index ...
Page 686: ...658 Revision History ...