SequentMicrosystems_API/scripts/fan_controller.py

from src.variables.service import get_variable, set_variable
from src.modules.RTD8.service import read_temp
from src.modules.IndustrialAutomation.service_analog import set_0_10_out

fans = [
    {
        "inputs": [             #temperature inputs
            {
                "type": "RTD",  #Card type
                "stack": 1,     #Card stack
                "channel": 1    #Card channel
            },
            {
                "type": "RTD",  #Card type
                "stack": 1,     #Card stack
                "channel": 2    #Card channel
            }
        ],
        "temp_min": 40, #minimum temp for fan_min
        "temp_max": 70, #maximum temp for fan_max
        "fan_min": 0,   #fan minimum 0-10V set
        "fan_max": 10,  #fan maximum 0-10V set
        "output_stack": 0,  #stack card
        "output_channel": 2 #card channel
    }
]


def get_temp(channel: dict) -> float:
    match channel["type"]:
        case "RTD":
            return read_temp(stack=channel["stack"], channel=channel["channel"])
        case _:
            return 0


def max_temp(channels: list) -> float:
    temp: float = 0
    for channel in channels:
        temp_ch = get_temp(channel=channel)
        if temp < temp_ch:
            temp = temp_ch
    
    return temp


def fan_control():
    for fan in fans:
        temp = max_temp(fan["inputs"])

        if temp > fan["temp_max"]:
            set_0_10_out(stack=fan["output_stack"], channel=fan["output_channel"], value=10)
        elif temp < fan["temp_min"]:
            set_0_10_out(stack=fan["output_stack"], channel=fan["output_channel"], value=0)
        else:
            temp_calc = temp - fan["temp_min"]
            temp_max_calc = fan["temp_max"] - fan["temp_min"]
            calc_out = round(temp_calc / temp_max_calc, 4) * 10
            set_0_10_out(stack=fan["output_stack"], channel=fan["output_channel"], value=calc_out)