Siemens SINUMERIK 840D Function Manual page 660

H1: Manual traversing
17.6 Manual traversing using a handwheel
MD11324 $MN_HANDWH_VDI_REPRESENTATION
Value
0
1
Output of the NC/PLC interface signals "travel command plus" / "travel command minus"
The output behavior of the NC/PLC interface signals "travel command plus" / "travel command
minus" is specified with the machine data:
MD17900 $MN_VDI_FUNCTION_MASK
Value
0
1
Velocity
The following axis velocities, effective during JOG, are also used for manually traversing using
the handwheel:
● SD41110 $SN_JOG_SET_VELO (axis velocity for JOG)
● SD41130 $SN_JOG_ROT_AX_SET_VELO (axis velocity for rotary axes for JOG mode)
● MD32020 $MA_JOG_VELO (conventional axis velocity)
Note
Because of the limited feedrate, the axis is not able to follow the handwheel rotation
synchronously, especially in the case of a large pulse weighting, and therefore overtravels.
Acceleration
As for manual travel (see "Parameter assignment (general) (Page 637) ").
Movement in the opposite direction
The behavior at a reversal of the traversing direction (by turning the handwheel in the opposite
direction) can be set in the machine data:
660
Meaning
Bit-coded representation (basic setting)
→ Three handwheels can be represented.
Binary-coded representation
→ Six handwheels can be represented.
Meaning
The NC/PLC interface signals "Travel command plus" / "Travel command minus" are already
output when a travel request is active (default setting).
The NC/PLC interface signals "Travel command plus" / "Travel command minus" are only
output when the axis actually moves (i.e. if setpoints are output to the servo).
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA