Accurate flow measurement by using PLC

Measuring the flow to an accuracy of 2 decimal places. In this example, the diameter of the pipe is measured by mm, the flow rate is measured by dm/s, and the flow is measured by cm3/s. The cross-sectional area of the pipe = πr2 = π(d/2)2 and the flow = cross-sectional area × flow rate

Assume the pipe diameter D0 is 10 mm and the flow rate D10 is 25 dm/s, the operation result of the total flow will be 196 cm3 /s.

Number of PLC Data Registers Required
D0 -Diameter of the pipe (unit: mm; set value: 10mm)
D6 -Operation result of the cross-sectional area (unit: mm2)
D10 -Flow rate (unit: dm/s; set value: 25dm/s)
D20 -Operation result of the flow (unit: mm3 /s)
D30 -Operation result of the flow (unit: cm3 /s)

Number of PLC Inputs Required
X0 - Starting the measurement

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