Siemens SINUMERIK Series Function Manual page 713

Block change behavior
Before synchronous operation is selected, it must be determined under what conditions the
block change must occur when synchronous mode is activated (see Section "Definition
(COUPDEF) (Page 721)").
Determine current coupling status
The $AA_COUP_ACT[<axial expression>] axial system variable can be used in the NC part
program to specify the current coupling status for the specified axis/spindle (see Section
"Axial system variables for synchronous spindle (Page 726)"). As soon as the synchronous
spindle coupling is active for the following spindle, bit 2 must be "1" when read.
Change defined angular offset
Language commands
synchronous mode is active. The following spindle is positioned as an overlaid movement at
the angular offset programmed with POS
(DB31, ... DBX98.4) is set.
Angular offset POS
FS
The defined angular offset POS
zero degrees position of the leading spindle in a positive direction of rotation.
The "0° position" of a position-controlled spindle is calculated as follows:
● From the zero mark or Bero signal of the measurement system and
● From the reference values saved using axis-specific machine data:
Range of POS
References:
Function Manual Basic Functions; Reference Point Travel (R1)
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
COUPON
MD34100 $MA_REFP_SET_POS, reference point value,
of no significance with interval-coded systems.
MD34080 $MA_REFP_MOVE_DIST reference point distance/target point
with interval-coded systems,
MD34090 $MA_REFP_MOVE_DIST_CORR reference point offset / absolute offset with
interval coding.
: 0 ... 359,999°.
FS
and allow the defined angular offset to be changed while
SPOS
. During this time, the IS "overlaid movement"
FS
must be specified as an absolute position referred to the
FS
S3: Synchronous spindle
13.1 Brief description
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