Feeds (V1); Signals To Channel (Db21 - Siemens SINUMERIK 840D sl Function Manual

Z1: NC/PLC interface signals

19.12 Feeds (V1)

19.12 Feeds (V1)
19.12.1

Signals to channel (DB21, ...)

DB21, ...
DBX0.6 Activate dry run feed
Edge evaluation: Yes
Signal state 1 or The dry run feedrate defined using the setting data:
edge change SD42100 $SC_DRY_RUN_FEED
0 → 1 is used instead of the programmed feed (for G01, G02, G03) if the dry run feedrate is greater than
that programmed.
The dry run feedrate is effective after the reset state.
This interface signal is evaluated at NC start when the channel is in the "reset" state.
The dry run feed can be activated from the PLC or operator panel.
When selected from the operator panel front, the PLC interface signal:
DB21, ... DBX24.6 (dry run feed selected)
is set and transferred from the PLC basic program to the interface signal:
DB21, ... DBX0.6 (activate dry run feed).
When selected using the PLC, the IS "activate dry run feed" should be set from the PLC user program.
Signal state 0 or The programmed feed is used.
edge change Effective after the reset state.
1 → 0
Application exam‐ Testing a workpiece program with an increased feedrate.
ple(s)
Special cases, If the signal changes to "0" within a G33 block, the programmed feed is not activated until the end of
errors, ...... the block is reached, since an NC stop was not triggered.
Corresponding to ... DB21, ... DBX24.6 (dry run feedrate selected)
SD42100 $SC_DRY_RUN_FEED (dry run feedrate)
1652
Signal(s) updated: Cyclically
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions