Signals From Channel (Db21 - Siemens SINUMERIK 828D Function Manual

Z1: NC/PLC interface signals
19.1 Various interface signals and functions (A2)
DB21, ...
DBX6.2 Delete distance­to­go (channel­specific)
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))
19.1.7

Signals from channel (DB21, ...)

DB21, ...
DBX36.6 Channel­specific NCK alarm is active
Edge evaluation: no
Signal state 1 or At least one NCK alarm is present for this channel.
edge change 0 → 1
Thus the following group interface signal is also set:
DB10 DBX109.0 (NCK alarm is present)
The PLC user program can interrogate whether processing for the channel in question has been
interrupted because of an NCK channel:
DB21, ... DBX36.7 (NCK alarm with processing stop present).
Signal state 0 or No NCK alarm is active for this channel.
edge change 1 → 0
Corresponding to .... DB21, ... DBX36.6 (NCK alarm with processing stop present)
DB10 DBX109.0 (NCK alarm pending)
Additional references /DA/ Diagnostics Guide
DB21, ...
DBX36.7 NCK alarm with processing stop present
Edge evaluation: No
Signal state 1 or At least one NCK alarm - which is causing a processing stop of the part program running in this
edge change 0 → 1 channel - is active.
Signal state 0 or There is no alarm active in this channel that is causing a processing stop.
edge change 1 → 0
Application With this alarm a program interruption because of an NCK alarm can be recognized immediately by
example(s) the PLC user program and the necessary steps introduced.
Corresponding to .... DB21, ... DBX36.6 (channel­specific NCK alarm pending)
Additional references /DA/ Diagnostics Guide
1624
Signal(s) updated: cyclic
Signal(s) updated: Cyclically
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions