Graco ProMix PD2K Operation page 46

Operation Using a Programmable Logic Controller (PLC)
Color Change Change Sequence Sequence
Color Color Change Sequence
NOTE: If using Cus tom Ma pping for color
cha nge va lve s , a nd the Inle t s ta ck is s e t to
S ingle , the Ma te ria l Re a dy fla g ne e ds to be
s e t prior to s ta rting a re cipe cha nge . If the
Ma te ria l Re a dy fla g is not s e t, the pump(s )
will not fill with the de s igna te d ma te ria l a nd
the re cipe cha nge will not comple te . S e e
"Write Ma te ria l Re a dy Fla g DCS
Comma nd a nd Cus tom Va lve Ma pping" for
more de ta ils .
Syst em Mode = Re c ip e
Change
(Out put Re gis te r 00 = '2')
Is Material B
chang ing?
Purge Material B out gun.
Syst em Mode = Re c ip e
Change: Purge B
(Out put Re gis te r 00 = '4')
Pump will flus h the n prime .
Is Material A
chang ing?
Purge Material A out gun.
Syst em Mode = Re c ip e
Change: Purge A
(Out put Re gis te r 00 = '3')
Pump will flus h the n prime .
46
Write Go to Re c ip e Nu m b e r
(0,1 - 30) t o Input Registe r 02
Recipe Chan g e System
Write '3' to Input Re gis te r 00
Is system in Standb y
with no a la rm conditions ?
Is purge com plete and
are p umps primed?
Fill mat erial out to mix
Syst em Mode = Recipe
NO
(Out put Re gis te r 00 = '5')
Is material fille d out to
Command
YES
manifold.
Change: Fi ll
mix ma nifold?
No action taken.
Either pu mps a re curre ntly
running or an alarm condition
exists.
Mix material out t o gun.
System Mode = Mix Fill
(Outpu t Register 00 = '6')
Is mix fill complete?
System Mode = Stand by:
Mix Ready
(Output Register 00 = '11')
3A4486D