A Pot-Life alarm condition exists if any of the 40 'buckets'
contains a time value greater than the Pot-Life Time (see
JOB parameters). A Pot-Life alarm may be cleared by en-
tering a Pot-Life Time of zero seconds.
Flush Volume
This parameter is programmed in cc's. It is the volume of
flush solvent or flush solvent/air mixture required to give an
adequate flush of the fluid lines for the gun. It is used by the
software to determine when an adequate flush has occurred.
Trigger OFF Delay
For automatic GUNs only. This parameter has two uses,
depending on the position of DIP SW1-2 (or SW1-6) on
the Channel Module.
In applications where the trigger off pneumatic action is
slow, DIP switch SW1-2 (or SW1-6) on the Channel Module
should be turned off so that when the GUN trigger signal
is removed, the PID loop for the CHANNEL will continue
to control the output of the MVR valve for the CHANNEL
based on the measured flow rate until the end of the Trigger
OFF Delay.
In applications where the trigger off pneumatic action is
fast, DIP switch SW1-2 (or SW-1-6) on the Channel Card
should be turned on so that when the GUN trigger signal
is removed, the PID loop for the CHANNEL holds at the
last output value until the end of the Trigger OFF Delay.
In this case, it is recommended that a trigger valve (color
control valve) be installed at the inlet of the MVR valve.
This valve should be driven by a solenoid controlled by
the MVR Enable signal for the CHANNEL. In this way, the
fluid line will not pressurize to the material supply pressure
while the GUN is not triggered and there will be no delay
in initiating flow when the trigger is turned on again, since
the MVR valve is already at the position last commanded
by the PID loop for the CHANNEL. If a trigger valve is not
installed at the inlet of the MVR valve, then the Trigger
OFF Delay should not be set greater than perhaps 0.5
seconds to avoid pressurization of the fluid line during the
Trigger OFF Delay. If the delay is too long in this situation,
excessive material may be released when the trigger is
turned on again due to the higher pressure in the fluid line.
In either case, the CHANNEL output returns to the MVR
LOW value at the end of the Trigger OFF Delay.
Trigger ON Delay
For automatic GUNs only. This parameter allows the user
to create a delay between the time when the controller
receives a trigger ON signal from a remote device to when
it actually starts the flow of material. This parameter should
be used only in special situations where pneumatic delays
present a problem.
Master and Slave Regulator Type
The channel hardware configuration is stored as this pa-
rameter. It is necessary for the controller to know which
fluid regulator type is being used so that the proper default
PID control parameters can be loaded (Kp, Ki, Kd).
Reverse Flow Volume
The amount of fluid which is allowed to flow backwards in
the GUN before the controller faults. Reverse flow could
cause catalyzed material to backup into either fluid line if
a check valve fails. Keep this value small to minimize that
possibility. If the GUN is configured for two-component
operation, than the Reverse Flow value will apply to each
of the CHANNELs assigned to the GUN.
Reverse flow rate is displayed on the main screen of the
Local Operator Interface as a flow rate bar colored red,
instead of green for normal flow rate.
Bar Chart Maximum Flow Rate
This parameter determines what flow rate is indicated at the
top of the bar-graphs on the main screen and determines
the maximum values displayed on the plot graph screens.
Flow Rate Tolerance Time
This parameter allows the user to program how long the
flow rate can continue to operate outside of the programmed
flow tolerance percentage before the unit fualts and stops
flow. It is expressed in seconds. If this number is too small,
nuisance flow out of tolerance faults may occur and if too
large, improper film builds could result.
Master Pot Volume
This is the volume of material that a pressure pot will be
filled with each time it is refilled. There is a pot-volume re-
set button on the Job Totals screen that allows the user to
preset these volumes when the pots are filled. This value is
incremented downwardly as material in the pot is consumed
and pot empty fault will occur if the volume ever reaches the
value of 0, warning the operator to refill the pot(s).
Slave Pot Volume
See "Master Pot Volume" information.
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