Mixing Valve Controller

The function block Mixing Valve Controller can be used to control common mixing valve types.
This makes it possible to control the flow temperature in heating systems or similar applications in ventilation and air conditioning systems.

Mixing valves or actuators can be controlled with two digital outputs for opening and closing, or with an analog value of 0-10.
The setpoint and actual temperature are connected to the block's inputs.

The PI controller of the block calculates the necessary mixing position based on the deviation between the setpoint and actual value, and controls the outputs accordingly.

For applications where cooling is required, the block can be switched to an inverted mode.

Table of Contents

Inputs↑

Abbreviation Summary Description Unit Value Range
ϑt Target temperature ° ∞
ϑc Current temperature ° ∞
Off Off Sets output (V) according to parameter (Offm). - 0/1
DisPc Disable periphery control Disables input (ϑt) when On. (e.g Child lock, cleaning) - 0/1

Outputs↑

Abbreviation Summary Description Unit Value Range
V Valve Provides signal for 0-10V mixing valve. V 0...10
O Open - 0/1
C Close - 0/1
Error Error Active when difference between current and target temperature exceeds 5°C/9°F for longer than 10 minutes. Error timer is reset and suspended for 15 minutes by reference drive, target temperature adaption or a change at input Off. - 0/1
AC API Connector Intelligent API based connector. - -