Ransburg DynaFlow User Manual - Manual (Page 50)

LN-9400-00.9
DynaFlow TM User Manual - Operation
rate of the master channel based on flowmeter
feedback and calculates the set point of the slaved
(catalyst) CHANNEL based on the ratio setting for
the GUN. The detection of a Trigger OFF signal
or the lack of Master CHANNEL flow meter pulses
will cause the controller to output the MVR LOW
setting to the Slave CHANNEL. In addition, the PID
control loop is frozen and the last control output
stored. Upon reapplication of a Trigger signal,
or the detection of Master CHANNEL flow meter
pulses depending on the dip switch setting on the
Channel Module, the stored Slave
CHANNEL control signal is output for a short delay
time and then the PID control loop is again initi-
ated. This results in stable control loop operation
regardless of the duration or quickness of trigger
signals.
The flow rate of the master CHANNEL will be
continuously monitored during operation and the
slaved CHANNEL set point adjusted accordingly.
If the slaved CHANNEL cannot achieve the proper
flow rate, the software issues a FLOW TOO LOW
or FLOW TOO HIGH fault.
Additionally, the software verifies ratio after each
TOLERANCE VOLUME has flowed through the
master channel flow meter by comparing the two
volumes that flowed during that time period and
calculates a "ratio error". If that error is greater than
the FLOW TOLERANCE parameter, the software
issues an OUT OF TOLERANCE fault.
When the GUN is given a HALT command, both
fluid regulators are set to 0 psi.
Load Mode
LOAD MODE is similar to RUN MODE. However,
in LOAD MODE, up to 10 faults are permitted be-
fore the gun will leave LOAD MODE and enter the
FAULT MODE. All eleven (11) faults will appear
in the Error Log screen. The GUN will automati-
cally leave LOAD MODE and return to the READY
MODE after a volume greater than or equal to
the Mixed Volume has flowed since the last fault.
To Place A GUN In LOAD MODE:
1. The external GUN Enable input must be sup-
plied to the Master CHANNEL. No system or GUN
faults can be active and the GUN configuration
and JOB tables should be properly
set.
2. The GUN Trigger input is not required for
manual GUNS.
3. A signal must be supplied to the Master CHAN-
NEL LOAD input or a LOAD command issued
from the Operator Interface Panel or other host
controller.
4. Flow will begin immediately.
To Exit LOAD MODE:
1. Simply remove the LOAD input and apply the
HALT input, or issue a command from the Opera-
tor Interface Panel (host controller).
GENERAL
The following are common to both AUTOMATIC
and MANUAL GUN operation.
Pulsed and Maintained Inputs
Pulsed inputs detect the transition in voltage, ei-
ther up or down. This form of input is comparable
to a momentary push-button. Pulsed inputs are
timing sensitive, e.g. the pulse MUST be present
at the input at the proper time in relation to other
input signals. The duration of the pulse is also
critical. Pulsed inputs should be supplied for at
least 0.25 seconds in duration. The input signal
is ignored after detection by the controller and
can be removed at any time after the minimum
0.25 seconds.
Maintained inputs require the voltage to be held
at a level, either low or high in order to perform
the intended function.
System Inputs and Outputs
System I/O applies to all GUNs in the system.
They provide system status, input for JOB
numbers, and all system commands.
46