Siemens SINUMERIK 840D sl Function Manual page 483

SGA SN1+, SN1-, SN2+, SN2-, SN3+, SN3-, SN4+, SN4-
These signals are used to indicate which of the plus or minus cams of cam pair 1, 2, 3 or 4 is
"actuated".
0 signal:
Axis/spindle is located to the left of the cam (actual value < cam position)
1 signal:
Axis/spindle is located to the right of the cam (actual value > cam position)
SGA Safe Cam Track
This signal displays whether the axis is located on a cam that is assigned to this cam track
(this only applies to the "Safe Cam Track" function).
0 signal:
The axis is not located on a cam of this cam track
1 signal:
The axis is located on a cam of this cam track
SGA Safe Cam range
These bits (4 bits per cam track) display in which cam range the axis is presently located (this
is only valid for the "Safe Cam Track" function).
SGA Safe Cam range bits
This signal displays at which cam the axis is presently located (this is only valid for the "Safe
Cam Track" function).
0 signal: The axis is not located at this cam
1 signal: The axis is located at this cam
SGA SBH active
The signal indicates the status of the Safe Operating Stop (SBH).
1 signal: SBH is active
0 signal: SBH is not active
SGA STOP A/B is active
This signal indicates that STOP A/B is active.
The signal must be used for the forced checking procedure for external STOPs.
0 signal: STOP A/B is not active
1 signal: STOP A/B is active
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Data descriptions
9.6 Interface signals
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