Ransburg DynaFlow User Manual - Manual (Page 73)

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DynaFlow TM User Manual - Maintenance
Gun Flow Out of Range
Explanation: (Manual Guns Only) This fault in-
dicates that the total flow rate through a GUN
has exceeded the MAXIMUM FLOW RATE JOB
parameter value or dropped below the MINIMUM
FLOW RATE JOB parameter.
Out of Tolerance Faults
Explanation: "OUT OF TOLERANCE" faults are
generated in the following manner. Every time a
specific volume of fluid passes through the GUN
(specified by the TOLERANCE VOLUME param-
eter), the controller determines the amount of resin
and catalyst material that flowed. The controller
then calculates the actual ratio and determines if
it is within the limits as set by the FLOW TOLER-
ANCE setting.
Reference the "Error Codes" table (Figure 16).
Typical causes for OUT OF TOLERANCE faults
are:
1. Kp, Ki, or Kd gains not set correctly.
2. Sticking or faulty fluid regulator.
3. Sticking or faulty flow meter.
4. Running the wrong JOB #, which may in-
clude the wrong gain values.
5. Fluid supply pressures not adjusted properly.
6. The MVR LOW JOB parameter set too high
(above the regulator cracking pressure).
7. Air bubbles or cavitation in the fluid.
8. Unstable fluid supply pressures to the fluid
regulators. This can be seen with pump supply
systems.
Corrective Action:
The cause is the material supply pressure in almost
every case when this fault is observed. Obviously,
if FLOW TOO LOW or FLOW TOO HIGH faults are
not occurring, the flow rates are operating within
the range of the fluid regulators. Over an extended
period of time, however, the volumes used are not
within the appropriate tolerance band. Observe
the ratio for both the resin and catalyst channels
that are producing faults while they are operating
or immediately after the controller faults (before
resetting it). If the actual ratio of the catalyst is
below target, adjust the supply pressure to the
catalyst regulator up approximately 5 psi, or adjust
the resin supply down by approximately 5 psi and
try to run again. Keep adjusting these pressures
until the actual ratio locks in on the target. Keep
in mind that higher is not always better. Many
times it is better to lower the pressure of the op-
posite channel, rather than raise a channel that
is operating low in ratio.
The Kp and Ki gain settings located in the JOB
tables may also be used to eliminate OUT OF
TOLERANCE faults. For example, if an OUT OF
TOLERANCE - CATALYST TOO HIGH fault occurs,
adjust the gain settings for the catalyst channel
down and vice-versa for a OUT OF TOLERANCE
- CATALYST TOO LOW fault. The resin channel
also needs to be taken into account for GUNs
configured as automatic.
Gun Not Ready
Explanation: This is not a fault condition and does
not prevent the GUN from operating. This error
occurs if a GUN has not been configured, is not
enabled, or no JOB #s have yet been saved and
the GUN is placed in the RUN mode. This can be
caused by trying to place a GUN in RUN mode
either from local display/interface or from an ex-
ternal control device such as a PLC or host PC.
Control Output
0 - 10 VDC
0
1
2
3
4
5
6
7
8
9
10
4
5.6
7.2
8.8
10.4
12.0
13.6
15.2
16.8
18.4
20.0
4-20 mA
Pressure
(PSIG)
0
10
20
30
40
50
60
70
80
90
100
ANALOG SEALING