AudioControl maestro m9, User Experience Manual

Page: 37 / 48

®
37
a
utomatIon
I
ntegratIon
MAESTRO M9
Command Structure - Receiving
Command processing begins when the first 0x0D (carriage return) is re-
ceived. The Maestro M9 will respond, either by making the change speci-
fied with a status update answer code or by replying with an error answer
code, within 3 seconds. More commands, however, may be sent before the
Maestro M9 responds to the first command. When a command is received,
the Maestro M9 echoes the command back in the following format:
<ST><ZN><CC><AC><DL><Data><ETR>
Parameter Command Description
s
tArt
0x21 Begins transmission to
Maestro M9
Z
one
n
umber
0x01 Zone 1
0x02 Zone 2
C
ommAnD
C
oDe
See code list The code of
the command
A
nswer
C
oDe
0x00 No problems – status
updated
0x82 Incorrect Zone
0x83 Incorrect Command
0x84 Incorrect Parameter
0x85 Invalid Command in
current state
0x86 Data length is
incorrect
D
AtA
l
ength
0x01, 0x02 etc… Number of data units
to follow
D
AtA
See code list The parameters for the
response, limited to
255
ETR
0x0D End transmission
As an example:
Answer code for source change in Zone 1 to DVD: 0x21 0x01 0x0A 0x00
0x01 0x00 0x0D