Add support for custom addressing by supplying a TsapPair to the PLC. CPU, Rack and Slot properties are still present to preserve backwards compatibility and to support alternate functionality based on the PLC type.
Allows communication with Siemens Logo 0BA8, currently no Siemens PLC is known to support >960 PDU size.
* ReadBytesWithSingleRequest cannot read >491 Bytes on S7-1500