Graco ProControl 1KS [81/138] Flow control operating process example

Integrated Flow Control

3A1080F 81

Flow Control Operating Process Example

Operating Ranges

Flow Control operating ranges correlate the desired flow

rate to the incoming flow set point signal (see below).

The operating ranges are:

• 0-300 cc/min

• 0-600 cc/min

• 0-1200 cc/min

• 0-100% (% open in manual override mode)

In this example, the range is set to 0-300 cc/min and

the target flow rate is 150 cc/min.

Step 1: Flow Set Point Input Signal

Discrete Input

A discrete signal is 0-10Vdc, which corresponds linearly

to the set operating range. For example, if the set range

is 0-300 cc/min and the desired flow rate is 150 cc/min,

the ProControl 1KS receives a flow rate setpoint (5Vdc

signal) from the PLC or robot.

Network Communication Input

A network communication signal is either the desired

flow rate (150 cc/min in this example) or the % open.

Step 2: Pressure Loop

NOTE: The gun must be triggered during the pressure

loop.

See F

IG. 85 for module 249849 and FIG. 86 for module

24H989. The ProControl 1KS drives the system to the

necessary pressure to meet the desired flow rate (150

cc/min). The pressure sensor in the module verifies the

actual pressure and returns the reading back to the Pro-

Control 1KS.

Step 3: Flow Loop

NOTE: The gun must be triggered during the flow loop.

The flow meters verify that the target flow rate is

achieved and feeds this information back to the ProCon-

trol 1KS. The ProControl 1KS adjusts the voltage to the

V/P to maintain the actual flow.

Step 2 and Step 3 repeat continuously to maintain pres-

sure and flow.