Multiple Feedrate Values In One Block - Siemens SINUMERIK 840D sl Function Manual

V1: Feedrates
17.4 Feedrate control
Mode of operation of the dry run feedrate
The mode of operation of the dry run feedrate entered in SD42100 can be set via the setting
data:
SD42101 $SC_DRY_RUN_FEED_MODE
Value
0
1
2
3 -9
10
11
12
17.4.5

Multiple feedrate values in one block

Function
The function "Multiple feedrate values in one block" can be used to activate six different
feedrate values of an NC block, a dwell time or a retraction motion-synchronously, depending
on the external digital and/or analog inputs.
When the input for the sparking out time or retraction path is activated, the distance-to-go for
the path axes or the particular single axis is deleted and the dwell time or retraction is started.
The retraction is started within an IPO cycle.
Signals
The input signals are combined in one input byte for the function. A fixed functional assignment
applies within the byte.
Table 17-1
Input no.
Feedrate address
I7 to I2: Activation of feedrates F7 to F2
E1: Activation of the dwell time ST/STA (in seconds)
I0: Activation of the retraction motion SR/SRA
1342
Meaning
The programmed feedrate is compared to the dry run feedrate in SD42100 and then tra‐
versing is performed with the higher of the two feedrates (default setting).
The programmed feedrate is compared to the dry run feedrate in SD42100 and then tra‐
versing is performed with the lower of the two feedrates.
The dry run feedrate entered in SD42100 takes effect directly, irrespective of the program‐
med velocity.
Reserved
As for configuration 0, except for thread cutting (G33, G34, G35) and tapping (G331, G332,
G63). These functions are executed as programmed.
As for configuration 1, except for thread cutting (G33, G34, G35) and tapping (G331, G332,
G63). These functions are executed as programmed.
As for configuration 2, except for thread cutting (G33, G34, G35) and tapping (G331, G332,
G63). These functions are executed as programmed.
Input byte for the "Multiple feedrates in one block" function
7 6
I7 I6
F7 F6
Bit
5 4 3
I5 I4 I3
F5 F4 F3
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
2 1 0
I2 I1 I0
F2 ST SR
Basic Functions