Axial System Variables For Synchronous Spindle - Siemens SINUMERIK Series Function Manual

S3: Synchronous spindle
13.2 Programming
13.2.3

Axial system variables for synchronous spindle

Determining current coupling status
The current coupling status of the following spindle can be read in the NC part program with
the following axial system variable:
$AA_COUP_ACT[<axial expression>]
For explanation of <axial expression>, see Section "Synchronous mode (Page 705)".
Example:
$AA_COUP_ACT[S2]
The value read has the following significance for the following spindle:
Byte = 0:
Bit 2 = 1:
Bit 2 = 0:
Read current angular offset
The current position offset between the FS and LS can be read in the NC part program by
means of the following axial system variables:
● Setpoint-based position offset between FS and LS:
● Actual-value-based position offset between FS and LS:
Example:
$AA_COUP_OFFS[S2]
If an angular offset is programmed with
reading the setpoint synchronization.
Reading the programmed angular offset
The position offset last programmed between the FS and LS can be read in the NC part
program by means of the following axial system variables:
$P_COUP_OFFS[<axial expression>]
Note
After cancellation of the servo enable signal when synchronous operation and follow-up
mode are active, the position offset applied when the controller is enabled again is different
to the originally programmed value.
$P_COUP_OFFS only returns the value originally programmed. $AA_COUP_OFFS and
$VA_COUP_OFFS return the current value. The programmed offset can be recreated with
NST DB31, ... DBX31.4 (resynchronization).
726
No coupling active
Synchronous spindle coupling active
Synchronized spindle coupling is not active
$AA_COUP_OFFS[<axial expression>]
$VA_COUP_OFFS[<axial expression>]
, this coincides with the value read after
COUPON
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
Extended Functions