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USB/RS485 Remote Control protocol for Presets Changing and Gain/Volume
controls
The following is the HEX Code for controlling the DPA-260A recall presets and master volume
control:
Preset Changing:
A. The User has to send the following Command, including the number of the preset to load on
the unit:
TX:
STX
ID_M
ID_N
F0H
C3H
XX
XX = 0,..,31 (ID device)
Npreset=0,...,23 Presetnumber
The DPA-260A's microcontroller will check if the Preset is initialized (available or not yet
created...)
B. If YES, then the microcontroller will send back to the User (eg Crestron/AMX Remote Control..)
the same frame used by the command
RX:
STX
ID_M
ID_N
F0H
C3H
XX
So in this case, if the user gets back EXACTLY what was sent, the preset is existing and loaded on
the unit.
C. If the preset that the user wanted to load is NOT YET INITIALIZED (not yet created, so not
available...). the microcontroller will notify that to the user, sending back the following frame:
RX:
STX
ID_M
ID_N
F0H
C3H
XX
CMD_RECALL_PRESET: CMD=1BH
CMD
D0
D1
1BH
00H
NPreset
CMD
D0
D1
1BH
00H
NPreset
CMD
D0
D1
1BH
00H
FFH
D2
D3
D4
00H
00H
00H
D2
D3
D4
00H
00H
00H
D2
D3
D4
00H
00H
00H
34
D5
D6
D7
00H
00H
00H
D5
D6
D7
00H
00H
00H
D5
D6
D7
00H
00H
00H
ETX
F7H
ETX
F7H
ETX
F7H
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