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This is a heating control loop using steam as a direct heating media. I plan on using the energy balance equation to determine the steam flowrate required and use a flow control loop to control the flow. For fine tuning I would like to use the temperature outlet temperature as a feedback trim in my control loop. To do this in a SLC505 do I set up the first PID loop as a flow controller and use the output (0-100%) as the bias (or feedforward parameter) in a second PID loop which is based on temperature control? Or is it the other way around? Or is there a better method.
Thanks
Thanks