MAD_CTL Mixed Air Damper Control - Operation Manual - ELC.E14 - EM1.8D - EM1.8R - EM1.8U

Description

This function block set is used to control the output of an analog mixed air damper, which is mainly linked to the output of an outside air damper, i.e., the opening percentage of the mixed air damper is equal to the subtraction of the outside air damper from 100 %. This set also has a manually override function.

If "Mixed Air Damper Mode Select" is "0 - MAN (manual)", the output is "Mixed Air Damper Manual Setpoint". If "Mixed Air Damper Mode Select" is "1 - AUTO", the output is the automatic logic value of the application.

Function

At any time when "Mixed Air Damper Mode Select" is "0" (0-MAN/1-AUTO), "Mixed Air Damper Control" is "Mixed Air Damper Manual Setpoint".

When "Mixed Air Damper Mode Select" is "1" (0-MAN/1-AUTO)", "Mixed Air Damper Control" is equal to the larger value of "Mixed Air Damper Minimum Setpoint" and the subtraction of the outside air damper from 100 %.

Internal logic

Input

Output

Example