Siemens SINUMERIK 840C Installation Instructions Manual page 334

09.95
NC MD 7
572*
Default value: MD 572 = 0000 1010 only on the 840C; otherwise, all bits are 0.
For 840C (M), all are 0.
Active: In the next block
Bit 4 Bit 4 = 0 When G90 and/or G68 are programmed with rotary axes, traversing paths
of > 360 degrees or > 180 degrees can result, and the established
direction of movement can change if zero offsets, tool offsets etc. are set
up for the first time or if ZO, TO etc. are altered in the program.
Example:
N1 G90 C0 LF
N2 C90 LF
N3 G58 C-180 LF
N4 G90 C+135 LF
(Bit 4=0) traversing path resulting from N3+N4.
315
N3
(Bit 4=1) traversing path resulting from N3+N4.
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Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
6 NC Machine Data (NC MD), NC Setting Data (NC SD)
Bit No.
6 5 4
Traverse
rotary axis
modulo 360
deg.
(C ... rotary axis)
N2
0
0
0
0
90
0
135
N4
0
180
6FC5197- AA50
6.6.4 Axis-specific MD bits 1 (axial bits 1)
3 2 1
TO Modulo
mirroring for 360° prog. Transverse
transverse of rotary axis
axis axis
0
Axes
without TO
on PRESET
6–149