Integrated Flow Control

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 ProMix 2KS receives a flow rate setpoint (5Vdc sig- nal) 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 FIG. 75 for module 249849 and FIG. 76 for module 24H989. The ProMix 2KS drives the system to the nec- essary 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- Mix 2KS.

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 ProMix 2KS. The ProMix 2KS 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.

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Graco TI12552a Flow Control Operating Process Example, Operating Ranges, Flow Set Point Input Signal, Pressure Loop
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TI12553a, TI12552a specifications

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