Basic Zero System (Bzs) - Siemens SINUMERIK 840D sl Function Manual

K2: Axis Types, Coordinate Systems, Frames
10.4 Coordinate systems
Power On
After control run-up (Power On), the last used offset values of the external work offset are
stored and do not become effective again until there is a renewed activation signal.
System frames are retained during Power ON, depending on the following machine data:
MD24008 $MC_CHSFRAME_POWERON_MASK (reset system frames after Power On)
Suppression: External work offset
● The SUPA command suppresses the external work offset while the block is being processed.
● Active external work offsets are suppressed for the duration of the reference point approach
through the G74 command (reference point approach) and the equivalent operator actions
in the reference point approach mode.
● With G74, i.e. "Automatic" or "MDA" mode, the previously active external work offset
automatically becomes active again with the next traversing movement in the block.
● After a mode change from the reference point approach mode, the NC/PLC interface signal
for the referenced axes must be set for reactivation.
10.4.5

Basic zero system (BZS)

Basic zero system (BZS)
The basic zero system (BZS) is the basic coordinate system with a basic offset.
Figure 10-16 Basic offset between BCS and BZS
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions