Siemens SINUMERIK 840D sl Function Manual page 856

Rotary Axes (R2)
13.4 Activating rotary axes
Possible combinations of rotary-axis machine data
1
0
JOG velocity for rotary axes
SD41130 $SN_JOG_ROT_AX_SET_VELO (JOG speed for rotary axes)
The above setting data can be used to specify a JOG velocity valid for all rotary axes.
If a value of 0 is entered in the setting data, axial machine data
MD21150 $MC_JOG_VELO (JOG axis velocity) acts as the rotary-axis JOG velocity.
References:
/FB2/ Function Manual, Extended Functions; Manual and Handwheel Travel (H1)
856
1 0
0 or 1 0 or 1
Yes The axis is a rotary axis; positioning is
performed with modulo conversion, i.e., the
software limit switches are inactive, the
operating range is unlimited; the position
display is absolute; axis with/without
working-area limitation can be used.
Not recom- Axis is not a rotary axis;
mended therefore, the other MD are not evaluated.
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions