Specifications

22 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 specications and command protocol described below.
Guidelines
The RS-232 control port on the 1156/66 is xed at
9600 baud. There is no provision for ow 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