6.2.6
Response Message Format
All valid command messages are acknowledged in the following forms. The address
and command characters are a reiteration of those in the command message.
5
ACK
4
address
command
5
ETX
4
checksum
Simple acknowledgment.
5
ACK
4
address
command
data
5
ETX
4
checksum
Acknowledgment with data.
Any unrecognised or unexecutable commands will be acknowledged in the form
shown below.
5
NAK
4
address
command
data
5
ETX
4
checksum
Not acknowledge, with explanation for the command rejection.
Any command containing a parity, framing, overrun, or checksum error will be
ignored and consequently the master must re-issue the command.
6.2.7
Message Timing
The maximum time between each character of a message must not exceed 10 ms,
and a pause of 10 ms minimum should be inserted after a command message to allow
units to recognise bus inactivity between commands.
HBN63xx-1, Issue 8, Page 34
