Siemens SINUMERIK 840D sl Programming Manual page 115

Travel with POSA
If a command, which implicitly causes a preprocessing stop, is read in a following block, this
block is not executed until all other blocks which are already preprocessed and stored have
been executed. The previous block is stopped in exact stop (as G9).
Examples
Example 1: Travel with POSA and access to machine status data
The control generates an internal preprocessing stop on access to machine status data ($A...).
Machining is stopped until all preprocessed and saved blocks have been executed in full.
Program code
N40 POSA[X]=100
N50 IF $AA_IM[X]==R100 GOTOF LABEL1
N60 G0 Y100
N70 WAITP(X)
N80 LABEL1:
N...
Example 2: Wait for end of travel with WAITP
Pallet feed equipment
Axis U:
Axis V:
Program code
N10 FA[U]=100 FA[V]=100
N20 POSA[V]=90 POSA[U]=100 G0 X50 Y70
N50 WAITP(U)
...
Further information
Travel with POSA
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
CAUTION
Pallet store
Transport of workpiece pallet to working area
Transfer line to a gauging station where spot checks are carried out to assist
the process
2.7 Feed control
Comment
; Access to machine status data.
Comment
; Axis-specific feedrate specifica-
tions for the individual position-
ing axes U and V.
; Traverse positioning and path ax-
es.
; Program execution does not resume
until axis U reaches the end point
programmed in N20.
Fundamentals
115