Siemens Sinumerik 840D sl Programming Manual page 172

Data Description
C.2 Channel-specific machine data
22420
MD number
Default setting: 0
Changes effective after POWER ON
Data type: BYTE
Meaning:
MD cannot be changed for SINUMERIK 802D sl.
22512
MD number
Default setting: -
Changes effective after POWER ON
Data type: BYTE
Meaning:
MD cannot be changed for SINUMERIK 802D sl.
22515
MD number
Default setting: -
Changes effective after POWER ON
Data type: DWORD
172
FGROUP_DEFAULT_AXES[n]: 0, ..., 7
Default value of the FGROUP command
min. input limit: 0
One can specify up to 8 channels whose resulting speed corresponds to the programmed
path feedrate. If all the 8 values are zero (default), then as earlier, the geo axes recorded in
$MC_AXCONF_GEOAX_ASSIGN_TAB are active as the default setting of the FGROUP
command.
Example: the first four axes in the channel are relevant to the path feedrate:
$MC_FGROUP_DEFAULT_AXES[0] = 1
$MC_FGROUP_DEFAULT_AXES[2] = 2
$MC_FGROUP_DEFAULT_AXES[3] = 3
$MC_FGROUP_DEFAULT_AXES[4] = 4
EXTERN_GCODE_GROUPS_TO_PLC[n]: 0, ..., 7
Specification of G groups that are output in the NCK PLC interface, if an external NC
language is active
min. input limit: -
The user can use the channel machine data $MC_EXTERN_GCODE_GROUPS_TO_PLC to
select the G groups of an external NC language whose active G command is to be reported
by NCK to PLC.
Default 0: no output
The NCK_PLC interface is updated with each block change and after each reset. A block-
synchronous relationship between NC block and the reported G functions does not exist in
each case (e.g., short blocks in continuous-path mode).
Similar to $MC_GCODE_GROUPS_TO_PLC
GCODE_GROUPS_TO_PLC_MODE
Response of the G group transfer to PLC
min. input limit: -
Protection level: 7/7
Valid as of software version: 5.2
Protection level: 2/7
Valid as of software version: 5
Protection level: 2/7
Valid as of software version: 6.3
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
max. input limit: 8
Unit: -
max. input limit: -
Unit: -
max. input limit: -
Unit: -
ISO Milling