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Point conversions are used to convert between the representations of external systems (the different Connectors List) and the normalized representation. 

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The point conversion is used by the connector framework with the curConvert, writeConvert, and hisConvert tags. Use cases include:

• mathematical conversions of raw modbus registers

• sensor voltage resets

• sensor thermistor tables

• unit conversion from fieldbus devices

So depending on the level where the user wants to make the conversion, meaning: the current value,write value or the history value, he will just add a string property tag for that point.

Example

If the user wants to convert the current value, for the numeric point in our screenshot, he will just add a curConvert string with the desired converted value ( let's say we want the value multiplied by 100)Image Removed

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Other examples of possible conversions:

• multiply raw value by 100 and add 75: * 100 + 75

• convert °C to °F:

   °C

   °C => °F

• reset 5-10 to 0-100:

   reset

   reset(5, 10, 0, 100)

• thermistor table; run pointThermistorTables() for full list:

   thermistor

   thermistor(10k-2)

• invert bool true -> false, vise versa:

   invert

   invert()

• swap endianness of unsigned two byte integer:

   u2SwapEndian

   u2SwapEndian()

• swap endianness of unsigned four byte integer:

   u4SwapEndian

   u4SwapEndian()

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All available functions are: