HUM_CTL Humidifier Control - Operation Manual - EM1.8U - ELC.E14 - EM1.8D - EM1.8R

Description

HUM_CTL uses PID to control an analog humidification valve and adjust output proportionally as per the current humidity value and setpoint.

Of all the inputs, Fault Alarm is generated from a PID-adjustable primary sensor. The PID-calculated output is 0 % in the event of a Fault Alarm.

This set also has a manual override function. If "Humidifier Control Mode Select" is "0 - MAN (manual)", the output is "Humidifier Manual Setpoint". If "Humidifier Control Mode Select" is "1 - AUTO", the output is the automatic logic value of the application.

Function

When "Fan Command" is "1" (0-OFF/1-ON) and "Sensor Fault Alarm" is "0" (0-OK/1-FLT), "Humidifier Control" is calculated based on PI inverse proportion, ranging from 0 % to "Maximum Output".

When "Humidifier Control Mode Select" is "0" (0-MAN/1-AUTO), "Humidifier Control" is "Humidifier Manual Setpoint".

When "Fan Command" is "0" (0-OFF/1-ON) or "Sensor Fault Alarm" is "1" (0-OK/1-FLT), "Humidifier Control" is 0 %.

The output priority is: Manual mode > Sensor Fault Alarm > PID calculated output in automatic mode.

Internal logic

Input

Output

Example