Runco Crystal CX-42HD, Installation & Operation Manual, Page: 65 / 84

Crystal Series LCD Installation/Operation Manual 51
PRE
L
IMINAR
Y
6.1
RS-232 Connection
and Port Configuration To interface the Crystal Series LCD with a home theater automation/control system or a
PC running terminal emulation software (such as HyperTerminal, provided with Microsoft
®
Windows™), connect it to your control system or PC as shown in Figure 3-9. Use a
straight-through cable.
Configure the RS-232 controller or PC serial port as follows: no parity, 8 data bits, 1 stop
bit and no flow control. Set the baud rate to match that of the Crystal Series LCD RS-232
port. To check the baud rate setting, select Baud Rate from the Setup menu (refer to
page 41).
6.2
Serial Command
Syntax • Commands are in ASCII format and are not case-sensitive.
• A carriage return is not required after a command.
• To send a command from a PC running terminal emulation software, create a text file
containing that command. Then, use the file transfer function in your terminal emulation
program to send the command. (If you are using HyperTerminal, choose “Send Text
File...” from the Transfer menu.)
• When you send a valid command, the Crystal Series LCD executes it and
acknowledges it with a right-bracket character (
]
) followed by the four-digit numeric
code you sent; for example,
]0002
.
• When you send an invalid command (one followed by values outside the valid range for
that command), the Crystal Series LCD ignores it and returns
>MAX
or
<MIN
instead of
the four-digit code.
• When you send an unrecognized/misspelled command, the Crystal Series LCD ignores
it and returns
-N/A
instead of the four-digit code.
Table 6-1 lists the RS-232 command set.
6. Serial Communications
Table 6-1. Serial Commands
Command Description
[ S3A 0###
Set audio volume to ### ( = 000-100)
Example:
[S3A0075
sets volume to 75
[ +3A
Audio volume up
[ -3A
Audio volume down
[ S3E 000#
Audio mute
0 = not muted, 1 = muted
Example:
[S3E0001
mutes the audio output