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+--- Thread: Thermostat (/showthread.php?tid=4004)
Thermostat - benanderson_475 - 19.04.2022
Hi,
I have several zones of heating/cooling/ducted ac
Obj per zone are
Room on/off (binary obj)
Room temp
Room setpoint
Room output (binary obj)
Global obj,
System mode, heat|cooling (binary obj)
I’m not sure what the best way to do, event script, resident script
I need to achieve
If room is off output is off
If room is on,
if global mode is heating and temp > setpoint output is on
else if not then output is off
if global mode is cooling and temp < setpoint then output is on
else if not then output is off
If temp changes while room is on re eval setpoint and adjust output if required
Should I do an event script, triggered by tag?
I looked into the pid script, but that achieves proportional control of the output?
RE: Thermostat - admin - 19.04.2022
You can use a resident script for this because you don't need instant reaction to the temperature/mode changes. 2-point thermostat is ok for this task but you should add hysteresis so the output does not bounce between on/off when room temp is near the setpoint. For example, in heating mode the output turns on when room temp < setpoint but turns off when room temp > (setpoint + 1).