Festo Distributing Station User manual

EN
01/04
Distributing station
GRAFCET

2© Festo Didactic GmbH & Co. KG • MPS
The following figure displays a comparison of symbols of DIN 40719-6 (1992-02) and
symbols of DIN EN 60848 (2002-12).
9
3s/X9"delay"
S
N
D delay t=3s
Left: DIN 40719-6; right: DIN EN 60848
Note
The standard DIN 40719-6 is valid until 2005-04.
DIN 40719-6
1992-02
Diagrams, charts, tables; rules for function charts;
(IEC 848 modified)
DIN EN 60848
2002-12
GRAFCET specification language for sequential function charts;
(IEC 60848)
Function chart according to DIN EN 60848

© Festo Didactic GmbH & Co. KG • MPS 3
6
"start"
indicator
light
A9
5
emptystep:
cyclestart
7
emptystep:
downstream
stationfree
C16
turnon"start"
indicatorlight
stationisreset
andininitial position
sequential functionchartaccordingtoDINEN60848(IEC60848) fortheDistributionstation
1-bit-link
flag"start"isnot set
flag"start"isset
downstreamstationfree
2
"reset"
indicator
light
3
initial-
position
4
reset
ok
turnon"reset"
indicatorlight
movestation
toinitial position
setflag"reset finished"
stationisnot reset
flag"start"isset
"reset"buttonpressed
flag"reset finished"isset
stationininitial position
1
Start
8
swivel arm
toposition
"downstream
station"
swivel armtoposition
"downstreamstation"
swivel armtoposition"downstreamstation"
Function chart Distributing station

Function chart Distributing station
4© Festo Didactic GmbH & Co. KG • MPS
swivel arminposition"downstreamstation"
B15
10
"magazine"
indicator
light
12
swivel arm
toposition
"magazine"
14
swivel arm
toposition
"downstream
station"
13
workpiece
pickedup
15
dropoff
workpiece
9
emptystep:
magazine
status
11
eject
workpiece
turnon"magazineempty"
indicatorlight
extendmagazineslide
(retract ejectingcylinder)
retractmagazineslide
(extendejectingcylinder)
turnon"start"indicatorlight
swivel armtoposition
"magazine"
setflag"cycleend"
turnoffvacuum
moveswivel armtoposition
"magazine"
moveswivel armtoposition
"downstreamstation"
turnonvacuum
workpieceinmagazineandswivel arm
inposition"downstreamstation" noworkpieceinmagazineandswivel arm inposition"downstreamstation"
noworkpiecepickedup
andmanual mode
noworkpiecepickedup
andautomaticmode
workpieceejected
swivel arminposition"magazine"
anddownstreamstationfree
workpiecepickedupandmagazineslideretracted
anddownstreamstationfree
swivel arminposition"magazine"
workpieceinmagazineand
error acknowledged
A8
B9
16
cycle
end
C5