Chapter 4—HDR 203HD RS-232 Serial Control
Page 8
October 26, 1998
series with a regular “straight through” cable. The net result of a null modem connec-
tion is:
Figure 3:
Null Modem Wiring Diagram
Serial Command Set
The HDR 203HD has a limited command set. The commands are simple, 4 character
“words”. There are no arguments.
Setting Up the Serial Port
The serial port on the HDR 203HD can be set up to echo the characters as they are
entered and provide limited feedback. Alternatively, it can be set up for no echo and no
response. These two settings are as follows:
V1
Echoes commands and provides feedback
V0
No echo and no feedback
Simply type the desired set up command and execute with a carriage return <CR>. With
the “
V1
” setting, commands beginning with a “W” followed by any other characters will
generate a “Ready” response. Commands entered starting with any other character will
generate an “Error!” response.
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
