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EP5804K, EP5804K-T, EP6504K and EP6504K-T RS232 User Guide 1
RS232 Codes
RS232 control is not necessary for operation, but is a convenient way to control
displays from a computer at a distance. Most things you can do with the remote, you
can do with RS232 commands. Plus, you can send inquiries to the displays and find
out the current settings and values.
1 RS232 Command Format
STX (1 byte) + IDT (1byte) + Type (1byte) + CMD (3bytes) + [Value/Reply (1byte)] +
ETX (1 byte)
STX: Start byte = 07
IDT: IDT is always set to 0x00. Monitor ID value can be used here.
Type: Read or Write command, 01: read, 02: write; 00: return to host (from
monitor)
CMD: As shown in the table on the following pages
Value (VAL): Setting Value to be written (for write commands only)
Reply (REP): The current value for the setting represented by CMD
ETX: End byte = 08
Transmit from PC (Host)
Read command: 07 IDT 01 CMD 08 (7bytes)
Write/Setting command: 07 IDT 02 CMD VAL 08 (8 bytes)
Response from Monitor: Sent after receiving any valid command. The response
CMD is the same as the received CMD.
Return command: 07 IDT 00 CMD REP 08 (8 bytes)
2 Serial Port Setting
Note: Baud rate can be set to 115200, 38400, 19200 or 9600 to match the monitor baud rate
setting. Baud rate 19200 is the default setting.
Explanation of symbols
▲: Valid command on power saving/off mode (The “Wake Up from Sleep” setting
must be set to “VGA, Digital, RS232”.)
Baud Rate Data Bit Parity Bit Stop Bit
19200 8 None 1