This page describes the device driver and the device window for a customized Building Management System (BMS) via Modbus. The BMS contains a variety of driver instances whereby this driver monitors an Air Handling Unit (AHU).
The driver uses the Modbus TCP protocol. The default TCP port used is 502.
As the driver is developed for a customized and unique system the online help does not contain any description of supported features and parameters.
Variables defined by this device driver
| name | type | flags | range |
|---|---|---|---|
| info.driver | TEXT | R/O | StringRange R/O |
| lowLevel.cmd | TEXT | StringRange | |
| lowLevel.reply | TEXT | R/O | StringRange R/O |
| faults.99 | ALARM | R/O | AlarmFlagRange R/O (Communication) |
| faults.commstat | TEXT | R/O | StringRange R/O |
| info.type | TEXT | R/O | StringRange R/O |
| info.port | TEXT | R/O | StringRange R/O |
| info.frame | TEXT | R/O | StringRange R/O |
| temperature.out | FLOAT | R/O | DoubleRange R/O (0.0 .. 0.0) |
| humidity.out | FLOAT | R/O | DoubleRange R/O (0.0 .. 0.0) |
| temperature.in | FLOAT | R/O | DoubleRange R/O (0.0 .. 0.0) |
| humidity.in | FLOAT | R/O | DoubleRange R/O (0.0 .. 0.0) |
| temperature.cwIn | FLOAT | R/O | DoubleRange R/O (0.0 .. 0.0) |
| fanSpeed | FLOAT | R/O | DoubleRange R/O (0.0 .. 0.0) |
| hoursRun | FLOAT | R/O | DoubleRange R/O (0.0 .. 0.0) |
| valve.open | FLOAT | R/O | DoubleRange R/O (0.0 .. 0.0) |
| valve.position | FLOAT | R/O | DoubleRange R/O (0.0 .. 0.0) |
| setpoint.temp | FLOAT | DoubleRange (0.0 .. 0.0) | |
| setpoint.humid | FLOAT | DoubleRange (0.0 .. 0.0) | |
| fan | CHOICE | R/O | EnumRange R/O (ON OFF) |
| humidifier | CHOICE | R/O | EnumRange R/O (ON OFF) |
| heater | CHOICE | R/O | EnumRange R/O (ON OFF) |
| compressor.1 | CHOICE | R/O | EnumRange R/O (ON OFF) |
| compressor.2 | CHOICE | R/O | EnumRange R/O (ON OFF) |
| dehumidification | CHOICE | R/O | EnumRange R/O (ON OFF) |
| enable | CHOICE | NOPRESET | EnumRange (ON OFF) |
| reset | TEXT | NOPRESET | StringRange |
| faults.01 | ALARM | R/O | AlarmFlagRange R/O (Local Stop) |
| faults.02 | ALARM | R/O | AlarmFlagRange R/O (Low Ret. Air Temp.) |
| faults.03 | ALARM | R/O | AlarmFlagRange R/O (High Ret. Air Temp.) |
| faults.04 | ALARM | R/O | AlarmFlagRange R/O (Low Ret. Air Humid..) |
| faults.05 | ALARM | R/O | AlarmFlagRange R/O (High Ret. Air Humid,.) |
| faults.06 | ALARM | R/O | AlarmFlagRange R/O (Low Sup. Air Temp.) |
| faults.07 | ALARM | R/O | AlarmFlagRange R/O (High Sup.. Air Temp.) |
| faults.08 | ALARM | R/O | AlarmFlagRange R/O (Low Sup. Air Humid.) |
| faults.09 | ALARM | R/O | AlarmFlagRange R/O (High Sup. Air Humid.) |
| faults.10 | ALARM | R/O | AlarmFlagRange R/O (Air Flow) |
| faults.11 | ALARM | R/O | AlarmFlagRange R/O (Air Filter) |
| faults.12 | ALARM | R/O | AlarmFlagRange R/O (Comp.1 High Pressure) |
| faults.13 | ALARM | R/O | AlarmFlagRange R/O (Comp.1 Low Pressure) |
| faults.14 | ALARM | R/O | AlarmFlagRange R/O (Comp.2 High Pressure) |
| faults.15 | ALARM | R/O | AlarmFlagRange R/O (Comp.2 Low Pressure) |
| faults.16 | ALARM | R/O | AlarmFlagRange R/O (Humidifier) |
| faults.17 | ALARM | R/O | AlarmFlagRange R/O (Heater) |
| faults.18 | ALARM | R/O | AlarmFlagRange R/O (Fire) |
| faults.19 | ALARM | R/O | AlarmFlagRange R/O (Water Detected) |
| faults.20 | ALARM | R/O | AlarmFlagRange R/O (Summary) |
| faults.21 | ALARM | R/O | AlarmFlagRange R/O (Unit Off) |