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About this manual
MDSC-1119 and MDSC-2124 __________________________________________________________________ 5
1.
About this manual
The RS232 ASCII communication protocol is available with all MDSC displays. It can be
used through customized RS232 software or by entering the necessary ASCII characters
through terminal software such as Realterm.
2.
RS232 Information
2.1.
Connection of Signals
The MDSC uses a RS232 connection type of 3-wires (RX / TX / GND) without
handshaking. The request to send (RTS) line and clear to send (CTS) line are also not
used by the MDSC.
2.2.
Data Format
Data Length: 8 bits
Transmission Method: Asynchronous
Start bit: 1 bit
Stop bit: 1 bit
No Handshaking
Characters used are part of the ASCII 256 standard
*Transmission Speed: 9600/19200/38400/57600/115200
*Note: Changing the transmission speed or baud rate of the RS232 communication in
your system requires also changing the transmission speed through the OSD menu of
the MDSC.
3.
Command Protocol
Designated ASCII characters determine when a complete command string begins and
ends. The command string must start with the “&&” ASCII characters and end with the
“;” ASCII character. A “,” is used to separate each of the parameters from the
command and from each other.
Commands can be sent sequentially as long as the entire command string is started
with a “&&” and terminated by “;”. A “:” should be used to separate each command.
When writing multiple commands you only need “&&” at the start of the first command.