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Old May 19th, 2010   #24
Task Group Member
Join Date: Aug 2008
Posts: 369

> What happens with the STATUS_GET_LAST_MESSAGE
> response if there is no last message to resend

Good question.

I'd probably respond with a STATUS_MESSAGES response (similar to E1.20 section 10.3.1 paragraph 3). That effectively means "I have no queued messages for you".

It's probably best to have no parameter data and set the PDL to zero. This way a status message won't get lost if the controller isn't expecting a STATUS_MESSAGES PID in response to a GET_LAST packet.
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