[esp-r] Control of a plant component

[Bernd B.]

Dear all,



I have a question concerning the control of a plant component:

I would like to control the mass flow of a pump (type 15, variable speed 
domestic WCH pump) according to a temperature difference between two 
plant components.

I know how to do that with a constant mass flow of the pump. However I 
want to use variable mass flow. Somehow I cannot combine a  *variable 
controller* with the *controller type "temperature difference*"!

In my view it's not possible to do that with a usual control function. 
Does anyone know how to get that done?



Thanks!

Best regards

Bernd


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