Siemens SINUMERIK 840D sl Programming Manual page 1007

Meaning
G290:
G291:
Conditions
SINUMERIK mode
● The default of the G commands can be defined for each channel via machine data.
● No language commands from the ISO dialects can be programmed in SINUMERIK mode.
ISO dialect mode
● The ISO dialect mode can be set with machine data as the basic setting of the control
system. In ISO dialect mode, the control system then reboots by default.
● Only G commands from the ISO dialect can be programmed. The programming of
SINUMERIK G functions is not possible in ISO dialect mode.
● ISO dialect and SINUMERIK language cannot be mixed in the same NC block.
● G commands cannot be used to switch between ISO dialect M (milling) and ISO dialect T
(turning).
● Subprograms that are programmed in SINUMERIK mode can be called.
● If SINUMERIK functions are to be used, a switchover to SINUMERIK mode must first be
made (see example).
Example
Compression of linear blocks in the ISO dialect mode
Program code
N5 G290
N10 COMPCAD
N15 G291
N20 G01 X100 Y100 F1000
...
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Activate SINUMERIK language mode
Alone in the block:
Effective:
Activate ISO language mode
Alone in the block:
Effective:
yes
Modal
yes
Modal
Comment
; Activate SINUMERIK language mode.
; COMPCAD is a command in the Siemens lan-
guage and activates a compressor function
that replaces the successive linear
blocks with polynomial blocks with path
lengths that are as long as possible.
; Activate ISO language mode.
; Since COMPCAD has been activated in the
SINUMERIK mode, even linear blocks in the
ISO dialect mode can be compressed with
this function.
Work preparation
3.23 Additional functions
1007