Siemens SINUMERIK 840D sl Function Manual page 97

Geometry axes
● PRESETON can be used on a stationary geometry axis when a further geometry axis is not
being traversed in the channel at the same time.
● PRESETON can be used on a stationary geometry axis even when a further geometry axis
is being traversed in the channel at the same time, but this axis is in the "neutral axis" state
or traversing as a command axis.
Example: A further geometry (X) is traversing at the same time in the "neutral axis" state
Example: A further geometry (X) is traversing at the same time as command axis
PLC-controlled axes
● PRESETON can be used on PLC-controlled axes according to their current type.
Spindle states
The following table shows the reactions that occur when PRESETON is used on a spindle in a
synchronized action:
PRESETON in synchronized action
Spindle mode
Speed control mode
Positioning mode SPOS
Positioning across block bounda‐
ries SPOSA
Synchronized actions
Function Manual, 08/2018, 6FC5397-5BP40-6BA2
Program code
N10 G0 X0 Y0
1)
N15 RELEASE(Y)
N20 ID=1 WHEN 20.0 < $AA_IM[X] DO
PRESETON(Y,20)
N30 G0 X40
N40 M30
1) Note
The release of an axis in the action part of a synchronized action does not ensure that the release
is on time.
N20 ID=1 WHEN 20.0 < $AA_IM[X] DO RELEASE(Y) PRESETON(Y,20) ; NOT
recommended!
Program code
N10 G0 X0 Y0
N20 ID=1 WHEN TRUE DO POS[X]=40
FA[X]=1000
N30 ID=2 WHEN 20.0 < $AA_IM[X] DO
PRESETON(Y,20)
N40 M30
Comment
; X, Y: Geometry axes
; Neutral axis
; $AA_IM: Set position in the
MCS
; Geometry axis X traverses
Comment
; X, Y: Geometry axes
; X command axis
; $AA_IM: Set position in the
MCS
Traversing sta‐ Assigned to the NC
tus program
In motion Alarm 17601
Stationary
In motion Alarm 17601
Stationary
In motion Alarm 17601
Detailed description
3.7 Actions in synchronized actions
Main axis
Alarm 17601
+
Alarm 17601
+
+
+
-
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