Siemens SINUMERIK 840D sl Function Manual page 1054

Z2: NC/PLC interface signals
19.4 Manual and handwheel travel
DB31, ...
DBX4.5 Rapid traverse override
Edge evaluation: No
Signal state 1 or If together with interface signal:
edge change 0 → 1 DB31, ... DBX4.0, 4.1, 4.2 (traverse key plus or traverse key minus)
the PLC interface signal:
DB31, ... DBX4.5 (Rapid traverse override)
is sent, then the corresponding machine axis is operating with rapid traverse.
The rapid traverse feedrate is defined in machine data:
MD32010 $MA_JOG_VELO_RAPID (Conventional rapid traverse).
The rapid traverse override is effective in the JOG mode for the following versions:
•
•
If rapid traverse override is active, the velocity can be modified with the rapid traverse override
switch.
Signal state 0 or The machine axis traverses with the defined JOG velocity:
edge change 1 → 0 SD41110 $SN_JOG_SET_VELO (Axis velocity with JOG)
or
MD32020 $MA_JOG_VELO (Conventional axis velocity).
Signal irrelevant for Operating modes AUTOMATIC and MDA
...
Reference point approach (JOG mode)
Corresponding to .... DB31, ... DBX4.7 and/or DBX4.6 (traversing key plus and traversing key minus)
DB31, ... DBB0 (axial feed/spindle override)
1054
Signal(s) updated: Cyclically
Continuous jogging
Incremental jogging
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions