Siemens SINUMERIK Series Function Manual page 181

Velocity reduction
The velocity generated using the handwheel for DRF can be reduced with respect to the
JOG velocity:
MD32090 $MA_HANDWH_VELO_OVERLAY_FACTOR (ratio of JOG velocity to handwheel
velocity (DRF))
DRF active
DRF must be active to allow the DRF offset to be modified by means of traversal with the
handwheel. The following requirements 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 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!
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
Traversing with the handwheel
•
Reading via axis-specific system variable $AC_DRF[<axis>]
•
• Deleting via parts-program command (
channel
Non-modal suppression via parts-program command (
•
References:
Programming Manual, Fundamentals
Reading the DRF offset (axis-specific)
•
References:
Function Manual, Basic Machine; PLC Basic Program (P3)
Display of the DRF offset (axis-specific)
•
H1: Manual and handwheel travel
3.7 DRF offset
) for all axes in a
DRFOF
SUPA
)
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