Siemens SINUMERIK 840D sl Function Manual page 316

H1: Manual travel and handwheel travel
4.7 DRF offset
DRF active
DRF must be active to allow the DRF offset to be modified by means of traversal with the
handwheel. The following preconditions must be fulfilled:
● AUTOMATIC mode
● DB21, ... DBX0.3 (activate DRF) = 1
The DRF offset can be activated/deactivated for specific channels using the "program
control" function on the HMI user interface.
The HMI software then sets the interface signal:
DB21, ... DBX24.3 (DRF selected) =1
The PLC program (basic PLC program or user program) transfers this interface signal to
interface signal
DB21, ... DBX0.3 (activate DRF) once the corresponding logic operation has been
performed.
Control of DRF offset
The DRF offset can be modified, deleted or read:
User:
Part program:
PLC user program:
HMI user interface:
Note
If DRF offset is deleted, the axis is not traversed!
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Traversing with the handwheel
•
Reading via axis-specific system variable $AC_DRF[<axis>]
•
Deleting via parts-program command (DRFOF) for all axes in a
•
channel
Non-modal suppression via parts-program command (SUPA)
•
References:
/PG/ Programming Manual Fundamentals
Reading the DRF offset (axis-specific)
•
References:
/FB1/ Function Manual, Basic Functions; Basic PLC Program (P3)
Display of the DRF offset (axis-specific)
•
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions