Graco ProMix PD2K Operation page 43

Purge Recipe Recipe Sequence Sequence
Purge Purge Recipe Sequence
Purge Recipe System Command
Write '9' to Input Re gis te r 00
Is Mix Unit #1 in Standby
or Pumps Of f?
System Mode = Purge B
(Output Register 00 = '10')
System opens catalyst solvent
valve at remote stack to allow
solvent flow through mix manifold
and out gun.
Purge time set according to the
flush sequence assigned to
material B in recipe.
Is solvent flow switch 2
ON?
NO
Purge time expired?
YES
3A4486D
Operation Using a Programmable Logic Controller (PLC)
No action taken.
Either pumps are currently
NO
running or an alarm condition
exists.
NOTE: System will automatically
skip Purge B if it is not necessary
(i.e. working with one component
recipes)
NO
Purge no flow timeout
NO
expired?
No solvent flow detected.
Generate alarm.
System Mode = Purge A
(Output Register 00 = '9')
System opens color solvent
valve at remote stack to allow
solvent flow through mix manifold
and out gun.
Purge time set according to the
.
flush sequence assigned to
material A in re cipe .
Is solvent flow switch 1
ON?
YES
NO
Purge time expired?
YES
System Mode = Standby : Mix
Not Ready
(Output Register 00 = '13')
System closes color solvent valve
at remote stack.
NO
Purge no flow timeout
NO
expired?
YES
No solvent flow detected.
Generate alarm.
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