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Old August 17th, 2011   #1
Junior Member
Join Date: Aug 2011
Posts: 8
Post Handling incorrect messages


I am working on implementing the, hopefully according to the standard, correct actions to be taken on incorrect messages that could be received by a responder.

After reading the standard several times I am still left with the following questions on how to do things proper:
1. A message count must be 0x00 as received by a responder. What if a non-zero value is received, this should generate a format error?
2. What error to give with a wrong message class value -> format error?
3. When the packet data length mismatches with data length -> format error?
4. When a PID requested via PARAMETER_DESCRIPTION is not available -> format error or range error?


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