3.6 Extends Formater, Translator and Combiner, Creating Encoding,Decoding,Combining methods for address

• AddressTranslator has two methods:

  • AddressTranslate is to translate a string address to AddressUnit.
  • GetAreaByteLength is that, an address has how many bytes in an area. For example, 40001 and 40002 in Modbus has 2 bytes length, so GetAdreaByteLength for "4X" returns 2.

• AddressFormater is to format an AddressUnit to a string address used for BaseUtility. It has two methods:

  • First FormatAddress: FormatAddress with no subaddress.
  • Second FormatAddress: FormatAddress with subaddress.

• AddressCombiner means how to combine duplicated AddressUnits into some AddressUnit groups. It has only one function called Combine, means how to combine AddressUnit.

  • The parameter of Combine means AddressUnits waiting to combine.
  • The return value is: from which AddressUnit to start, get how many addresses, and there are multiple messages like above.
  • Please remember there is a parameter in contructor called "max length", means the max combination length. It shows that the continus combination addresses has a max byte length. This length is decided by protocol, which may communicate failed when real byte length for each communication unit is larger than max byte length.