APPENDIX C: SERIAL INTERFACE
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Appendix C: Serial Interface
Via the serial interface, the whole switch matrix of the ServSwitch™- DKM can be
controlled. The functionality corresponds to the Switching in OSD / Crosspoint Mode
(p. 104).
Optionally, the ServSwitch™- DKM echoes all executed switch commands via either the
serial interface ort he network interface. By means of this echo, the actual switch status of the
switch can be monitored at any time and user applications can be realized based on this echo.
As an additional application, the serial interface may be used to clone a master switch to
additional ServSwitch™ DKM slaves (Daisy Chain).
Communication Format
For communication, please set up the format of the serial data communication to:
115,2K,8,1,NO
(115,2 KBAUD, 8 Data bit, 1 Stop bit, NO parity)
Telegram Structure (Command)
<STX>, <command byte (CMD)>, [data bytes (D0..DN)], <ETX>
[ ] = optional elements
Telegram Structure (Response)
<ACK>, [<ECHO>]
[ ] = optional elements
<ECHO> reports the switch sequences solicited by a command and thus the new switch status
of the switch. The echo can be used to update user applications and to operate several
switches in parallel.
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