USB/RS485 Remote Control protocol for Presets Changing and Gain/Volume
controls
The following is the HEX Code for controlling the DLM26 recall presets and master volume control:
Preset Changing:
CMD_RECALL_PRESET: CMD=1BH
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 CMD D0 D1 D2 D3 D4 D5 D6 D7 ETX
F0H C3H XX 1BH NPreset 00H 00H 00H 00H 00H 00H 00H F7H
XX = 0,..,31 (ID device)
Npreset=0,...,64 Preset number
The DLM26'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 CMD D0 D1 D2 D3 D4 D5 D6 D7 ETX
F0H C3H XX 1BH NPreset 00H 00H 00H 00H 00H 00H 00H F7H
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 CMD D0 D1 D2 D3 D4 D5 D6 D7 ETX
F0H C3H XX 1BH FFH 00H 00H 00H 00H 00H 00H 00H F7H
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