Appendix B: Control panel protocol
Appendix B: Control panel protocol
The SDC 8000 conference and interpretation system supports a control panel. The central unit sends a control command to the connected control panel:
ywhen a delegate or chairman unit is activated,
ywhen a delegate or chairman unit is deactivated,
ya microphone goes into request mode,
ywhen all active microphones are deactived simultaneously (priority function).
The control panel sends a control command to the central unit:
ywhen a delegate or chairman unit is to be activated,
ywhen a delegate or chairman unit is to be deactivated,
ywhen the control panel is to be reset (Reset)
The control panel must be connected to the SDC 8000 CU central unit’s COM 2 interface (RS 232 connection). The settings for the communications port for the control panel are:
Bits per second: 19,200
Data bits: | 8 |
Parity: None
Stop bits: | 1 |
Flow control: None
Note!
In order to connect a control panel to the central unit, you have to purchase the serial output license SDC 8000
Commands
All commands sent by the SDC 8000 CU central unit start with a “%” sign. The last character is a character which states the end of the transmission. Just before the
STX “%” | data | CRC | ETX |
Start of | Data of the | 16 bit sum of the | End of |
Transmission | command | ASCII characters | Transmission |
Character |
| between STX and | Character |
(0x25 = “%”) |
| CRC | (0x0D) |
The CRC checksum is in uppercase hexadecimal form while all other numbers are in decimal form.
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