...
Therefore it is sufficient to add the PID controller in the OnStartEvent() function. In this example we use the following parameters:
Name | Value |
|---|---|
| actualItemId | "NETx\\VIRTUAL\\BuildingA\\Floor1\\RoomA\\Current" |
| setpointItemId | "NETx\\VIRTUAL\\BuildingA\\Floor1\\RoomA\\Setpoint" |
| controlItemId | "NETx\\VIRTUAL\\BuildingA\\Floor1\\RoomA\\Control" |
| ta | 10 |
| Kp | 0.2 |
| Ki | 0.0000222222 |
| Kd | 0 |
| minControlValue | 0 |
| maxControlValue | 255 |
| esumMin | -2 |
| esumMax | 65536 |
| onChange | true |
| Code Block | ||||
|---|---|---|---|---|
| ||||
function OnStartEvent()
AddPidController("NETx\\VIRTUAL\\BuildingA\\Floor1\\RoomA\\Current", "NETx\\VIRTUAL\\BuildingA\\Floor1\\RoomA\\Setpoint", "NETx\\VIRTUAL\\BuildingA\\Floor1\\RoomA\\Control", 10, 0.2, 0.00002222222, 0, 0, 255, -2, 65536, true)
end |
...
Ki is calculated as Kp/Tr where Tr is the reset time in seconds of the controller. A typical value for warm water heating is 150 minutes . Thus, Ki = 0.2/150*60 = 0. 00002222222 for heating.
Article applies to the following products:
- NETx BMS Platform R2 Build 1000+
- NETx Multi Protocol Server R2 Build 1000+