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7 - X 4 In a blending facility ( see Figure 7 - X 1 ) , tanks T - 1 , T - 2
X
In a blending facility see Figure X tanks T T and T charge to blend tank T through a mass flowmeter FTT with totalizer FTOTT The equipment in the figure are the batch charge equipment module for this mixing unit. The batch charge equipment module has phases TCharge MassTarget TChargeMassTarget and TChargeMassTarget
a Write the phase TChargeMassTarget which charges MassTarget kg of the contents of to T The phase should start the tank circulating first, start the charge, end the charge when the flow totalizer indicates completion, then blow the line back to T Use a Sequential Function Chart for your solution.
b Write a state table for all devices in the equipment module to better document the Equipment states necessary to run the TCharge phase.
c Write Hold, Stop and Abort logic for your phase. Indicate a reentry point for Restart after Hold.
Figure
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