Siemens SINUMERIK 840D sl Function Manual page 303
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Effectiveness of FOCON/FOCOF
The state of the modal-acting torque/force reduction FOCON/FOCOF is maintained during the
search and is effective in the approach block.
Block search with FXS or FOC
The user selects FXS or FOC in a program area of the target block in order to acquire all states
and functions of the machining last valid. The NC starts the selected program in Program test
mode automatically. After the target block has been found, the NC stops at the beginning of
the target block, deselects Program test internally again and displays the Stop condition
"Search target found" in its block display.
SERUPRO approach does not really take the FXS command into account.
The approach to the programmed end position of the FXS block is only simulated without
torque limitation.
If FXS is located between the beginning of the program and the search target, the command
is not executed by the NC. The motion is only simulated up to the programmed end point.
The user can log the turning on and turning off of FXS in the part program. If necessary, the
user can start an ASUB in order to activate or deactivate FXS in this SERUPRO-ASUP.
System variable
The reference and actual state of the "travel to fixed stop" function can be read using the
following system variable:
● $AA_FXS (reference state)
● $VA_FXS (actual state)
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.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
CAUTION
tion
"Deactivated"
"Activated"
F1: Travel to fixed stop
6.2 Detailed description
System variable $AA_FXS ==
0 (axis not at fixed stop)
3 ("Travel to fixed stop" selection is active)
303
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