Av-452 serial control specification, Room volume level (command only), Query all status – Tascam AV-452 User Manual
Page 8: Emg break (read only), Dip switches (read only)
AV-452 Serial Control Specification
7733 Telegraph Road • Montebello, CA 90640 • (323) 726-0303 • http://www.tascamcontractor.com
All features and specifications are subject to change without notice. Contact your local TASCAM representative for the latest information.
Page 8 of 8
AV-452_RS-232_spec.pdf
031104
ROOM VOLUME LEVEL (COMMAND ONLY)
The ROOM VOLUME control adjusts the level that comes out
the SPEAKER OUTPUT and STEREO OUTPUT. The knob is
motorized, and can be controlled externally. Commands
are available for up or down; there is no status message for
this command - it acts just like the infrared command. One
volume command will turn the dial for 1/2 second.
STATUS - HPF OFF (ID 1)
3
33h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
1
31h
0
30h
s
73h
1
31h
0
30h
CR
0Dh
0
30h
.
2Eh
STATUS - HPF ON (ID 1)
3
33h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
1
31h
0
30h
s
73h
1
31h
0
30h
CR
0Dh
1
31h
.
2Eh
STATUS - CASCADE EXCL (ID 1)
4
34h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
1
31h
0
30h
s
73h
1
31h
0
30h
CR
0Dh
0
30h
.
2Eh
STATUS - CASCADE MIX (ID 1)
4
34h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
1
31h
0
30h
s
73h
1
31h
0
30h
CR
0Dh
1
31h
.
2Eh
STATUS - MONO OFF (ID 1)
5
35h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
1
31h
0
30h
s
73h
1
31h
0
30h
CR
0Dh
0
30h
.
2Eh
STATUS - MONO ON (ID 1)
5
35h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
1
31h
0
30h
s
73h
1
31h
0
30h
CR
0Dh
1
31h
.
2Eh
ROOM VOLUME DOWN
8
38h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
1
31h
N
4Eh
c
63h
A
41h
0
30h
CR
0Dh
0
30h
.
2Eh
ROOM VOLUME UP
8
38h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
1
31h
N
4Eh
c
63h
A
41h
0
30h
CR
0Dh
1
31h
.
2Eh
QUERY ALL STATUS
This command triggers the AV-452 to send all status
messages for a complete update on the system. This is
great for control systems when the unit has not been
monitored in a while, so all functions can become known.
QUERY ALL STATUS
A
41h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
A
41h
N
4Eh
c
63h
A
41h
0
30h
CR
0Dh
0
30h
.
2Eh
EMG BREAK (READ ONLY)
When the AV-452 detects an emergency alarm is activated
(by the relay activation on the EMG port), the AV-452 will
shut down all local audio. All the LEDs flash on the front
panel when in this status. For the control system, this
status is the key to recognizing the situation. As with the
other commands, these status messages are sent when the
status changes.
QUERY EMG
6
36h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
1
31h
N
4Eh
q
71h
A
41h
0
30h
CR
0Dh
1
31h
.
2Eh
STATUS - NORMAL (ID 1)
6
36h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
1
31h
0
30h
s
73h
1
31h
0
30h
CR
0Dh
0
30h
.
2Eh
STATUS - EMG BREAK (ID 1)
6
36h
.
2Eh
LF
0Ah
.
2Eh
.
2Eh
1
31h
0
30h
s
73h
1
31h
0
30h
CR
0Dh
1
31h
.
2Eh
DIP SWITCHES (READ ONLY)
Some of the dip switches on the rear panel are logic
controlled, and will emit their status when the "request all"
status is sent. These switches are only scanned when the
unit first turns on. It may be desirable to have the control
system alert an AV tech if these settings do not match the
normal setting, in case someone tampered with them.