Siemens Sinumerik 840D sl Programming Manual page 554

Axis couplings
9.5 Synchronous spindle
Reset coupling parameters, COUPRES
COUPRES activates the coupling values parameterized in the machine and setting data:
• COUPRES(S2,S1) (with specification of leading spindle)
• COUPRES(S2) (without specification of leading spindle)
System variables
Current coupling status of following spindle
The current coupling status of a following spindle can be read using the following system
variable:
$AA_COUP_ACT[<FS>]
Value
0
4
Note
Other system variable values refer to the axis operation.
Reference:
List Manual, System Variables
Current angular offset
The current angular offset of a following spindle in relation to the leading spindle can be read
using the following system variable:
• $AA_COUP_OFFS[<FS>] (angular offset on the setpoint side)
• $VA_COUP_OFFS[<FS>] (angular offset on the actual value side)
Note
When the controller has been disabled and subsequently re-enabled during active
coupling and follow-up mode, the position offset when the controller is re-enabled is
different to the original programmed value. In this case, the new position offset can be
read and, if necessary, corrected in the part program.
554
Meaning
No coupling active
Synchronous spindle coupling active
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
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