Siemens Sinumerik 840D sl Programming Manual page 14

Principles of programming
1.2 Preconditions for the feed
Example
$SC_FIXED_FEEDRATE_F1_F9[0] = 5000
$SC_FIXED_FEEDRATE_F1_F9[1] = 1000
$SC_FIXED_FEEDRATE_F1_F9[2] = 500
N10 X10 Y10 Z10 F0 G94
N20 G01 X150 Y30 F1
N30 Z0 F2
N40 Z10 F0
Table 1- 2
F function
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
Note: Input format = REAL
Note
If the function is activated with MD $MC_EXTERN_FIXED_FEEDRATE_F1_ON and if the
feed value from the setting data is not to be active with F1 to F9, then the feed value is
programmed as actual value. If, for instance, a feed value should be programmed at 1
mm/min, the feed must be programmed with F1.0 instead of F1.
If the "DRY RUN" (test run) switch is set to "ON", all the feed commands are traversed at the
feed set for the test run.
The Feed Override function is effective even for the fixed feedrates F0 to F9.
The feed set in the setting data is stored even after the control system is switched off.
In a macro call with G65/G66, the value programmed with F is stored in the system variable
$C_F, i.e. the numeric values 0 to 9 are stored.
If, in a cycle call, a fixed feed (F0 - F9) is programmed in a machining program, the feed
value is read from the relevant setting data and stored in the variable $C_F.
14
;Approach position at 5000 mm/min
;Feed 1000 mm/min active
;Position approached at 500 mm/min
;Approach position at 5000 mm/min
Setting data for the default setting of feedrate F
Setting Data
$SC_EXTERN_FIXED_FEEDRATE_F1_F9[0]
$SC_EXTERN_FIXED_FEEDRATE_F1_F9[1]
$SC_EXTERN_FIXED_FEEDRATE_F1_F9[2]
$SC_EXTERN_FIXED_FEEDRATE_F1_F9[3]
$SC_EXTERN_FIXED_FEEDRATE_F1_F9[4]
$SC_EXTERN_FIXED_FEEDRATE_F1_F9[5]
$SC_EXTERN_FIXED_FEEDRATE_F1_F9[6]
$SC_EXTERN_FIXED_FEEDRATE_F1_F9[7]
$SC_EXTERN_FIXED_FEEDRATE_F1_F9[8]
$SC_EXTERN_FIXED_FEEDRATE_F1_F9[9]
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
ISO Milling