Brightsign RS232 Serial Interface to DMX
BS-RS232-DMX (SERIAL) BOARD
This board is used by the Brightsign to control a DMX Dimmer Pack or other DMX device.
Transmit Protocol: 170,DMX-Channel1, DMX-Channel2 to DMX-Channel40 (first byte has to be 170 (decimal). When the 'decimal 170' byte is received, the board is ready to receive the DMX values. IF the first byte of a transmission is not 170 (decimal), then the Hz-LED flashes at 3 Hz.
The DMX bytes have to be sent from the BrightSign as 'multiple serial bytes',
no carriage return. Use the BrightAuthor
Command 'Serial-Send Bytes (comma separated)'.
I.E. to set channels 1-4 at 50% brightness send: [170,128,128,128,128].
Serial-DMX protocol: In order to reliably communicate with this board there has to be a protocol set. There has to be a 20 millisecond 'Break' when sending 'data byte strings' to this board from the Brightsign. The Protocol is: [170, DMX Channel1 byte, DMX Channel2 byte, DMX Channel3 byte, ..to DMX Channel 40] followed by 'BREAK'. Any number of bytes can follow the 'start byte' of 170 decimal.
Note: If only channel 3 needs to be changed, then send channel 1 through channel 3. (Only the channels preceding the channel that needs changing needs to be sent.
Fade Selection: Fixed fade of 20 milliseconds for each 'brightness change' is set in firmware. Use the following switch settings to enable fade.
Note: For more fade channels or for variable fade, use the HMS-RS232-DMX board.