Graco ProMix PD2K Operation page 71

System Screen Screen 4 4 4
System System Screen
System screen 4 sets the following system operating
parameters.
Figure 40 System Screen 4
Fluid Fluid Fluid Control Control Control
Select the desired operating mode (pressure or flow),
using the pull-down menu.
Pressure Mode, Mode, the motor will adjust the pump
• In Pressure Pressure Mode,
speed to maintain the fluid pressure set by an
external control device.
Flow Mode, Mode, the motor will maintain a constant
• In Flow Flow Mode,
speed to maintain the target flow rate set by an
external control device.
Gun Gun Trigger Gun Trigger Trigger Signal Signal Signal
Select the format of the signal indicating whether the
spray device is triggered.
• Discrete — the signal is sent via a direct,
hard-wired connection
• Network — the signal is sent via a PC, PLC, or
other networked device.
Flow Control Control (Setpoint (Setpoint Signal)
Flow Flow Control (Setpoint
Select the format of the signal that indicates system
flow rate or pressure.
3A4486D
Signal)
Signal)
• Discrete — the signal is sent via a direct,
hard-wired connection. This selection will make
the Max Set Point field active.
• Network — the signal is sent via a PC, PLC, or
other networked device.
• Recipe — flow rate or pressure is set according to
user-entered value on each recipe screen.
Max Set Set Point Point
Max Max Set Point
Set the scaling factor for the 4–20 mA discrete Flow
Control Signal (see Analog Inputs, page
Low Low Flow Low Flow Flow Tolerance Tolerance Tolerance
This field is active if Fluid Control is set to 'Flow'.
The system will detect if the flow rate falls below a
designated percentage of the target flow rate. Set
that percentage in this field. For example, you might
want the system to time out if it detects a flow rate
that is 10 percent of the target, rather than waiting
until a no flow timeout occurs.
Low Flow Flow Timeout Timeout
Low Low Flow Timeout
The low flow timeout causes the system to shut down
after the designated period of time if the flow rate
continues to be at or below the low flow tolerance set
in the previous section. The default is 5 seconds.
Enter the desired shutdown time in this field.
Solvent Push Push Enable Enable
Solvent Solvent Push Enable
Enable the Solvent Push option for the end of a
mix/spray cycle. When enabled, the system may be
commanded to end a mix/spray cycle with solvent
push using the soft key on the ADM Spray Screen
or using a PLC command. For more details, see
Solvent Push, page 72.
NOTE: NOTE: The solvent push feature is only available NOTE:
for Flow Mode fluid control systems with single
outlet color change valve configurations (see
Custom Valve Mapping, page
only visible if the mix unit is configured in this way.
Setup Mode Screens
24).
82). The checkbox is
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