Siemens SINUMERIK Series Function Manual page 194

H1: Manual and handwheel travel
3.9 Retraction in the tool direction (JOG retract)
Selection via the user interface
The selection of JOG retract is performed on the user interface via the "Retract" softkey:
"Machine operating area" > "ETC key (">")" > "Retract"
Selection by PLC user program
The following actions must be performed to select JOG retract by the PLC user program:
● Channel-specific query whether retraction data is available
● Mode group-specific selection of JOG mode:
● Channel-specific selection of JOG retract via the PI service "RETRAC".
● After confirmation of the selection of JOG retract (see below), select the workpiece
Selection confirmation
Following a successful selection, the following NC/PLC interface signal is set:
DB21, ... DBX377.4 = 1 (JOG retract active)
Thread cutting ( or
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If the program execution was aborted during a thread cutting operation (
axis grouping of tool axis and spindle is restored when JOG retract is selected. The
controller parameters and parameter sets for the involved axes are also set in accordance
with a programmed thread cutting in the part program.
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DB21, ... DBX377.5 == 1 (retraction data available)
DB11, ... DBX(n*20+6).2 == 1 (active mode: JOG, with n=0, 1 ,2 ... for mode group 1, 2,
...)
A detailed description of the activation of the PI service "RETRAC" via the function block
FB 4 can be found in:
References:
Basic functions Function Manual, Section "P3: Basic PLC program for SINUMERIK 840D
sl" > "PI services"
coordinate system:
– DB19.DBX20.7 (switch MCS/WCS)
– DB19.DBX0.7 (actual value 1 =WCS, 0 =MCS)
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Function Manual, 03/2013, 6FC5397-1BP40-3BA1
or / ), the
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Extended Functions