AKG AS8 Operating Instructions Manual page 15

There are several "status" flags that may be set by the host computer. Those flag commands that store the new value in
EEPROM will continue to have the new value even if the power to the AS8 is turned off. One of these flags is particularly
important when controlling the AS8 from an AMX or Crestron controller. This is Set Remote Level Read Flag, command 7.
This flag must be set to 1 (see the command description below for more information) before the AS8 will respond to any
attempts to change the gain of any channel via the LecNet RS-232 port. When the Remote Level Read flag is set to 1, the
AS8 will ignore any inputs on the rear panel DB-15 connector. Similarly, if the Remote Level Read flag is set to 0, the AS8
will ignore any remote level data sent via the LecNet RS-232 port. Two other commands, Set Compressor/Leveller Read
Switch Flag and Set Auto/Direct Read Flag work in a similar manner to Set Remote Level Read Flag. The AS8 uses either
the LecNet RS-232 data or the associated local switch to control the Compressor/Leveller functionality or the Auto/Direct
status of the channels, depending on the state of these two flags.
The following commands are described from the perspective of the host. A "Get" command allows the host to receive
information from the AS8. A "Set" command allows the host to send information to set some parameter in the AS8.
G D C
ENERAL EVICE
Get Device Name - Causes the AS8 to send its "name" string back. The first data byte is the length of the name string,
and the rest of the data bytes are the device name.
Host sends command - 1
Host receives data bytes: Byte 1 is the length of the name string (3 for the AS8), bytes 2, 3, and 4 are the ASCII
values for "AS8" (66,77,56).
Set Device Address - Sets the AS8 device address and stores the new address in EEPROM.
Host sends command - 2
Host sends 1 byte: device address, valid range 128 to 254.
Get Firmware Version - Causes the AS8 to send to the host the version number of the current firmware. For example,
Version 1.0 software would be returned as 10 (decimal).
Host sends command - 25 (19 hex)
Host receives data byte: firmware version.
Get Channel "On" Status - Causes the AS8 to send to the host the current status of all channels (i.e. "on" or "off"),
packed into one data byte as shown below. The status of each channel is represented by one bit in the returned
data byte:
MSB (Bit 7) - CH8 status
Bit 6 - CH7 status
Bit 5 - CH6 status
Bit 4 - CH5 status
Bit 3 - CH4 status
Bit 2 - CH3 status
Bit 1 - CH2 status
Bit 0 - CH1 status
If the associated bit is a 1, the channel is currently on, while a 0 indicates an off channel.
Host sends command - 20 (14 hex)
Host receives data byte: 0-255, interpreted according to the table above.
OMMANDS
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