Siemens SINUMERIK 840D sl Function Manual page 1053
Extended functions
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DB10
DBX110.0-113.7
Minus cam signal 1-32
Signal state 0 or
Linear axis:
edge change 1 → 0
The minus cam signal switches from 1 to 0 when the axis traverses the minus cam in the positive
axis direction.
Modulo rotary axis:
The minus cam signal changes level in response to every positive edge of the plus cam signal.
DB10
DBX114.0-117.7
Plus cam signal 1-32
Edge evaluation: No
Signal state 1 or
The switching edge of the plus cam signal 1-32 is generated as a function of the traversing
edge change 0 → 1
direction of the (rotary) axis and transferred to the PLC interface in the IPO cycle.
Linear axis:
The plus cam signal switches from 0 to 1 when the axis traverses the plus cam in the positive
direction.
Modulo rotary axis:
The plus cam signal switches from 0 to 1 when the minus cam is overtraveled in the positive axis
direction.
The described response of the plus cam applies under the condition:
plus cam - minus cam < 180 degrees
If this condition is not fulfilled or if the minus cam is set to a greater value than the plus cam, then
the response of the plus cam signal is inverted. The response of the minus cam signal remains
unchanged.
Signal state 0 or
Linear axis:
edge change 1 → 0
The plus cam signal switches from 1 to 0 if the axis overtravels the plus cam in the negative
direction.
Modulo rotary axis:
The plus cam signal switches from 1 back to 0 if the plus cam is overtraveled in the positive axis
direction.
The described response of the plus cam applies under the condition:
plus cam - minus cam < 180 degrees
If this condition is not fulfilled or if the minus cam is set to a greater value than the plus cam, then
the response of the plus cam signal is inverted. The response of the minus cam signal remains
unchanged.
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Signal(s) updated: Cyclic
NC/PLC interface signals (Z2)
19.9 Software cams, position switching signals
1053
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