IHSE USA 474 Series Draco major - Manual (Page 153)

Specifications
2011-10-11 153
(Special) characters: ACK 0x06
NAK 0x15
STX 0x02
ETX 0x03
CR 0x0D
ESC 0x1B
HTAB 0x09
LF 0x0A
Sequence of a Data Communication
Draco major Matrix Control CPU
– Sending of a command
Acquiring of a command,
processing of a command,
blocking of further commands –
a) Errors occurred: <NAK>
b) No errors: <ACK><ECHO>
c) Optional: Reply telegram with
data –
– a) Repeat telegram
b) Next command
c) Receive and process the repeat
telegram
The serial interface can be blocked while OSD has been opened.