Siemens sinumerik 840D sl Function Manual page 543

Detailed description
2.6 Programming
Functionality
Parameterizable digital outputs (system variable $A_OUT) can be used for direction-
dependent disabling of the traversing motion (manipulated variable) induced via clearance
control. As long as e.g. the negative traversing direction is disabled, the clearance-controlled
axes will only travel in a positive direction due to the sensor signal.
This can be used for example when laser-cutting sheet steel to "skip over" sections of sheet
that are not to be machined without foundering.
Parameterization
The following machine data is used to parameterize the digital outputs:
• MD62523 $MC_CLC_LOCK_DIR_ASSIGN_DIGOUT[n] (assignment of the digital outputs
Example
The following digital outputs are to be used:
• $A_OUT[3] to disable the negative traversing direction
• $A_OUT[4] to disable the positive traversing direction
Parameter settings in the machine data:
• MD62523 $MC_CLC_LOCK_DIR_ASSIGN_DIGOUT[0] = 3 (assignment of the digital
• MD62523 $MC_CLC_LOCK_DIR_ASSIGN_DIGOUT[1] = 4
Effect:
• $A_OUT[3] = 0 → Negative traversing direction enabled
• $A_OUT[3] = 1 → Negative traversing direction disabled
• $A_OUT[4] = 0 → Positive traversing direction enabled
• $A_OUT[4] = 1 → Positive traversing direction disabled
Inversion of the evaluation
Enter the negative number of the digital output to evaluate the digital output signal with
inversion:
Parameter settings in the machine data:
• MD62523 $MC_CLC_LOCK_DIR_ASSIGN_DIGOUT[0] = -3 (assignment of the digital
• MD62523 $MC_CLC_LOCK_DIR_ASSIGN_DIGOUT[1] = -4
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for disabling the CLC movement)
n = 0 → Digital output for disabling the negative traversing direction
n = 1 → Digital output for disabling the positive traversing direction
outputs for disabling the CLC movement)
outputs for disabling the CLC movement)
Special functions: Clearance Control (TE1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0