Siemens Sinumerik 802D sl Programming Manual page 68

Movement Control Commands
3.2 Determining the coordinate value input modes
Use of G90 and G91 (G code system B and C)
Table 3-2
G90
G91
Table 3-3
Example: With the commands of "G91 G00 X40. Z50.;" axis movement commands are
executed as incremental commands.
Auxiliary data for circular interpolation
The auxiliary circular interpolation data I, J, K, and R are always interpreted as in-
cremental commands.
Notice
It is not allowed to specify G90 and G91 in the same block. If both of these G co-
des are specified in the same block, the one specified later becomes valid. For
example, if the commands of "G01 G90 X80. G91 Z60.;" are specified in a block,
G91 specified later becomes valid and all axis movement commands (X80. and
Z60.) are interpreted as incremental commands.
3-68
Function of G90 and G91 commands
G code
Absolute designation
Incremental designation
Valid address for G90/G91 designation
Address
X, Z, C, Y
U, W, H, V
SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning - - 04.07 Edition
Function
03
03
G90 command
Absolute
Incremental
© SIEMENS AG 2007 All rights reserved
04.07
Group
G91 command
Incremental
Incremental