Audio Authority AVAtrix, 1156 and 1166 User Manual
Appendix B: RS-232 Serial Protocol
Model 1166 and 1156 with or without Model 1176 expanders can be controlled via RS-232 from a PC or
dedicated controller. Follow the specifications and command protocol described below.
Guidelines
The RS-232 control port on the 1156/66 is fixed at
9600 baud. There is no provision for flow control
(XON/XOFF, DTR, etc.). On power up, the 1156/66
echoes any received character, but that echo function
may be turned off as described at the end of this sec-
tion to prevent corruption of replies.
Definitions
Command:
String received by the 1156/66 from the
controlling hardware. Commands are not case sensi-
tive and may be 7 or 8-bit with Odd, Even, Space,
Mark, or No parity. The only characters recognized
are: letters (
a
-
z
and
A
-
Z
), numbers (
0
-
9
), brackets
(
[
and
]
), signs (
+
and
-
), and the question mark (
?
).
All other characters, including spaces and commas,
are optional and may be either included for clarity or
omitted entirely.
Response:
String transmitted by the 1156/66 to the
controlling hardware. Responses are 8-bit with no
parity. Responses are transmitted as noted below,
and always have a
C/R L/F
sequence (0x0d, 0x0a)
after each line.
Query:
A special command that requests the current
status of one or more connections or settings, but
does not change any operation within the 1156/66.
A query must always contain the
?
question mark
character.
Parameters:
Values contained within commands
and responses which identify zones, sources,
Wallplates, and router devices.
j:
zone in range {1-6}
m:
source in range {1-6}
n:
Wallplate in range {1-6}
x:
A/V router device in range {A-L}
In this document, braces
{
and
}
are used to signify
ONE of the enclosed characters. For example,
{L,U}
would mean either of the two characters
L
or
U
.
Extended Command Set:
All valid commands receive a response.
Command:
Response:
Description:
[C,M,Im]
(M,Im)
Connect main output to source
m
[C,Rx,On,Im] (Rx,On,Im) Connect Wallplate n of A/V
router x to source m
[C,X,Im]
(X,Im)
Connect all Wallplates on all
A/V routers to source m
[C,Zj,Im]
(Zj,Im)
Connect all outputs in zone j
to source m
[L,P]
(P,L)
Lock out front panel controls
[U,P]
(P,U)
Unlock front panel controls
[L,I]
(I,L)
Lock out internal I/R receiver
[U,I]
(I,U)
Unlock internal I/R receiver
[L,A]
(A,L)
Lock out AutoSelect function
[U,A]
(A,U)
Unlock AutoSelect function
[+,B]
(B,+)
Turn on display blanking after
45 seconds of inactivity
[-,B]
(B,-)
Turn off display blanking
[+,P]
(P,+)
Select Professional Screen
[-,P]
(P,-)
Select Residential Screen
[+,A]
(A,+)
Turn on AutoSelect if not
disabled (see Q+, Q- below)
[-,A]
(A,-)
Turn off AutoSelect
Query:
Response:
Description:
[?,C,Rx,On]
(Rx,On,Im) Query unit connection
[?,C,M]
(M,Im)
Query main connection
[?,C,X]
see below
Query all connections
[?,{L,U},P]
(P,{L,U})
Query status of panel lockout
[?,{L,U},I]
(I,{L,U})
Query status of internal I/R
lockout
[?,{L,U},A]
(A,{L,U})
Query status of AutoSelect
lockout
[?,{+,-},B]
(B,{+,-})
Query status of Display blank-
ing
[?,{+,-},P]
(P,{+,-})
Query status of Display
Screen
[?,{+,-},A]
(A,{+,-})
Query status of AutoSelect
function
