Simplified handling of CoE parameters in ELM3xxx

The devices of this series are parameterized via the so-called CoE directory, e.g. here ELM3602:

This directory is available for each channel individually under index 0x8000 (channel 1), 0x8010 (channel 2) etc. The following functions are provided for quick and easy editing of the possibly extensive parameters:

• Set all channels to "None":
  Basic for a channel function is the interface 0x80n0:01. It can be set to "None" by command: in the CoE object 0xFB00:01, PAI Command: Request
  
  the following value is to be entered (attention: bytes are rotated):
  0x5100 for all channels at the same time
  If successful, Response = "01" is reported
• Copy all settings from one channel to the other:
  in the CoE object 0xFB00:01, PAI Command: Request:
  
  the following value is to be entered (Attention: Bytes are rotated):
  0x50sd: s = source channel, d = destination channel
  with 0=channel 1, 1=channel 2 etc., for d = "F": channels
  In case of success Response = "01" reports: