Block Search Response - Siemens SINUMERIK 828D Function Manual

F1: Travel to fixed stop
6.2 General functionality
Function abort
A function abort can be triggered by the following events:
• Emergency stop:
- With an 840D control, the NC and drive are brought into a no-current condition for "Emergency Stop", i.e.
the PLC must react.
- With an 840Di control, the NC and drive are brought into a no-current condition for Emergency Stop, i.e.
the PLC must react.
• The fixed stop monitoring function responds in the case of:
- Exit from fixed stop position by axis
- Tool breakage
- Pulse disable
6.2.3

Block search response

Block search with calculation
The response is as follows:
• If the target block is located in a program section in which the axis must stop at a fixed limit, then the fixed
stop is approached if it has not yet been reached.
• If the target block is located in the program section in which the axis must not stop at a fixed limit, then the
axis leaves the fixed stop if it is still positioned there.
• If the desired fixed stop status is reached, alarm message 10208 "press NC Start to continue the program" is
output. The program can be continued after pressing NC Start to acknowledge.
• At the start of the target block, FXST[x] and FXSW[x] are set to the same value as they would have during
normal program processing.
Block search without calculation
The commands FXS, FXST and FXSW are ignored.
FOC
FOCON/FOCOF is activated modally. It is already active in the approach block.
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CAUTION
Make sure that after canceling the function
"Travel to fixed stop" by "Emergency Stop," no dangerous machine situation
(MD37002 $MA_FIXED_STOP_CONTROL e.g. canceling pulse disable) can occur.
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions