Siemens SINUMERIK 840D Function Manual page 102

F1: Travel to fixed stop
3.2 Detailed description
SERUPRO: $AA_FXS (reference state)
During SERUPRO, $AA_FXS supplies the following values depending on the activation status
of the "Travel to fixed stop" function:
Activation status of the "travel to fixed stop" func‐
Note
During SERUPRO, the system variable $AA_FXS only supplies the values 0 and 3. As a result,
based on $AA_FXS, the program sequence can be changed with SERUPRO compared to the
normal program execution for program branches.
SERUPRO: $VA_FXS (actual state)
During SERUPRO, the variable $VA_FXS always supplies the real state of axis on the machine.
Example
The current state of the "Travel to fixed stop" function can be determined in the SERUPRO
ASUP via the system variables $AA_FXS and $VA_FXS, and the appropriate response
initiated:
Program code: FXS_SERUPRO_ASUP.MPF
N100 WHEN ($AA_FXS[X]==3) AND ($VA_FXS[X]==0) DO
FXS[X]=1
N200 WHEN ($AA_FXS[X]==0) AND ($VA_FXS[X]==1) DO
FXS[X]=0
N1020 REPOSA
Displaying the REPOS offset
Once the search target has been found, for each axis, the actual state regarding the "Travel to
fixed stop" is displayed using the following NC/PLC interface signals:
● DB31, ... DBX62.4 (activate travel to fixed stop)
● DB31, ... DBX62.5 (fixed stop reached)
Example:
If the axis is at the fixed stop and the target block is available after deselection of FXS, the new
target position is displayed via DB31, ... DBX62.5 (fixed stop reached) as the REPOS offset.
102
tion
"Deactivated"
"Activated"
Comment
; Reference=="Selection not active" AND
; Actual=="Axis not at fixed stop"
; => "Switch on"
; Reference=="Axis not at fixed stop" AND
; Actual=="Fixed stop successfully approached"
; => "Switch on"
; Reapproaching the contour linearly with all axes
System variable $AA_FXS ==
0 (axis not at fixed stop)
3 ("Travel to fixed stop" selection is active)
Function Manual, 06/2019, A5E47437747B AA
Axes and spindles