EVAPCO eco-Air Series, Руководство пользователя

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23
Controller User Manual
The EVAPCO Controller provides two methods of automatic setpoint control. When the Fan Speed Control: is set to PID, the fan
speed will be adjusted based on the deviation of the process temperature to the desired setpoint by a PID regulator. Note that there
are several factors that may influence the behavior of a PID controller, and the proper tuning parameters may vary from the factory
defaults. PID regulation is the recommended method of control for the EVAPCO Controller.
When the Fan Speed Control: is set to Proportional, the fan speed will be scaled linearly based on the desired setpoint and a differential
band parameter.
Parameter Description
Proportional Controls the fan speed by subtracting the process temperature from
the setpoint temperature and linearly ramping up the fan speed to
the current maximum value.
PID (Default) Controls the fan speed by utilizing a feedback compensator
consisting of a proportional, integral, and derivative value.
Table 10
The description of the possible fan speed control options.
Parameter Description Default
Gain The proportional term of the PID. 4
Ti The integral term of the PID. 20
Td The derivative term of the PID. 0
Table 11
The parameters of the PID regulator.
Figure 30
Proportional or PID selection