Siemens SINUMERIK 840C Installation Instructions Manual page 860

01.99
Function extension of the symmetrical traversing range for rotary axes (as from SW 6)
General
In the case of rotary axes with EnDat absolute encoders and up to SW 5, a position between 0
and 360 degrees or between 0 and 16 revolutions was calculated (depending on MD 1808*,
bit 6). Once switched off at an axis position of -45 degrees, e.g. a position of 315 degrees was
calculated after the next POWER ON.
Bit 0 in MD 1804* must be set to 1 in order to achieve a symmetrical traversing range around
the zero position for finitely turning rotary axes. In this case, no modulo offset is implemented
between -180 degrees and +180 degrees (if MD 1808*, bit 6=1) or between -8 to +8 rota-
tions (if MD 1808*, bit 6=0).
Examples for incorrect overflow:
MD 1808*, bit 6
1
1
1
1
1
0
0
0
0
0
The maximum traversing range for rotary axes remains at 16 rotations above which a modulo
offset is implemented.
The symmetrical traversing range is not available in conjunction with the area
expansion for the ENDAT absolute encoder (MD 1808*, bit 7=1).
© Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
More user manuals on
MD 1804*, bit 0
0
1
0
1
1
1
0
1
0
1
ManualsBase.com
12.11.2 ENDAT absolute encoder (SW 5.2 and higher)
Position before
POWER OFF
-45 degrees
-45 degrees
315 degrees
315 degrees
2700 degrees (=7.5 rev)
2700 degrees (=7.5 rev)
-45 degrees
-45 degrees
3060 degrees (=8.5 rev)
3060 degrees (=8.5 rev)
6FC5197- AA50
12 Functional Descriptions
Position after
POWER OFF
315 degrees
-45 degrees
315 degrees
-45 degrees
180 degrees
2700 degrees
5355 degrees
-45 degrees
3060 degrees (=8.5 rev)
-2700 degrees (=7.5 rev)
12–85