Runco CW-50MC - Manual (Page 22)

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6) Protocol: From computer to plasmas display:
(1) When sending one command at a time:
STX (02 hex) ID (2 Byte) COMMAND (3 Byte or 6 Byte) ETX (03 hex)
COMMAND: 3 Byte (ASCII)
ARGUMENT: 3 Byte (ASCII)
(2) When transmitting commands in batches (up to max. 3 commands are possible): (NOTE)
STX (02 hex) ID (2 Byte) COMMAND (3 Byte) ARGUMENT (3 Byte) ETX (03 hex)
(3) Echo back
STX (02 hex) COMMAND (3 Byte or 6 Byte) ETX (03 hex)
When the recieved command is a numerical direct effect command, numerical data is returned.
STX (02 hex) COMMAND (3 Byte) ARGUMENT (3 Byte) ETX (03 hex)
When the recieved command is non-corresponding command, 'ERR' is returned.
STX (02 hex) ERR (3 Byte) ETX (03 hex)
When it is determined that the received command cannot be processed (when PON is received when the power
is already ON, etc.) 'XXX' is returned.
STX (02 hex) ERR (3 Byte) ETX (03 hex)
Interface
RS-232C ADJUSTMENT MODE