Signals To Channel (Db21 - Siemens SINUMERIK 840D sl Function Manual

DB19
DBX41.0 - DBX41.7 Channel number (FC9: ChanNo)
Edge evaluation: no
Meaning This byte contains the channel number (FC9: ChanNo).
DB19
DBX42.0 FC9: Start (measuring in Jog mode)
Edge evaluation: no
Signal state 1 or Start active
edge change 0 → 1
Signal state 0 or Start inactive
edge change 1 → 0
2.1.6

Signals to channel (DB21, ...)

DB21, ...
DBX6.2 Delete distancetogo (channelspecific)
Edge evaluation: no
Signal state 1 or Delete distancetogo (channelspecific):
edge change 0 → 1
IS "Delete distancetogo (channelspecific)" for path axes is only active in AUTOMATIC mode.
The rising edge of the interface signal is only effective for the axes involved in the geometry
grouping. These are also stopped with a ramp stop and their distancetogo deleted (setpoint - actual
value difference). Any remaining following error is not removed. The next program block is then
started.
IS "Delete distancetogo (channelspecific)" is therefore ignored by positioning axes.
Note:
IS "Delete distancetogo" does not influence the running dwell time in a program block with dwell
time.
Signal state 0 or No effect
edge change 1 → 0
Signal irrelevant for Positioning axes
...
Application To terminate motion because of an external signal (e.g. measuring probe)
example(s)
Special cases, Delete distancetogo (channelspecific)
errors, ....
When the axes have been stopped with IS "Delete distancetogo" the next program block is
prepared with the new positions. After a "Delete distance-to-go", geometry axes thus follow a
different contour to the one originally defined in the part program.
If G90 is programmed in the block after "Delete distancetogo" it is at least possible to approach the
programmed absolute position. On the other hand, with G91, the position originally defined in the
part program is no longer reached in the following block.
Corresponding to .... DB21, ... DBX6.2 (delete distance-to-go (axis-specific))
Basic logic functions: NC/PLC interface signals (Z1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Signal(s) updated: cyclic
Signal(s) updated: cyclic
Signal(s) updated: cyclic
2.1 Various interface signals and functions (A2)
Detailed Description
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