Siemens SINUMERIK 840D sl Commissioning Manual page 477

You specify the settings in the following machine data:
MD52207 $MCS_AXIS_USAGE_ATTRIB[n]
Bit 3
Bit 4
Bit 5
As a result, the following setting options are obtained for the main spindle:
Main spindle direction of rotation
SINUMERIK Operate (IM9)
Commissioning Manual, 03/2013, 6FC5397-1DP40-3BA1
Displayed positive direction of rotation is counter-clockwise (for rotary axes)
The view must be from the inside of the machine (operator's view) to the axis of rotation.
Displayed direction of rotation for M3 is counter-clockwise (for spindles)
This bit can be set from the operator's view or according to DIN 66025.
Direction of rotation for M3 corresponds to minus rotary axis (for spindles)
This bit must be set analogous to PLC bit DBn.DBX17.6!
52207[n] 52207[n]
bit 3 = bit 4 = *)
0 0
0 1
1 1
1 0
Configuring cycles
Attributes of the axes
[n] channel axis number
52207[n] DB3n.
bit 5 = DBX17.6
0
1
0
1
22.5 Turning
0
1
0
1
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