Message block format, Stx Etx Msb Lsb

MSB

5thbyte) Message Type: (Case sensitive.)

Refer to section 4.2 “Message block format” for more details.

ASCII 'A' (41h): Command.

ASCII 'B' (42h): Command reply.

ASCII 'C' (43h): Get current parameter from a monitor.

ASCII 'D' (44h): "Get parameter" reply.

ASCII 'E' (45h): Set parameter.

ASCII 'F' (46h): "Set parameter" reply.

6th -7thbytes) Message Length:

Specify the length of the message (that follows the header) from STX to ETX. This length includes STX and ETX.

The byte data must be encoded to ASCII characters.

Ex.) The byte data 3Ah must be encoded to ASCII characters '3' and 'A' (33h and 41h). The byte data 0Bh must be encoded to ASCII characters '0' and 'B' (30h and 42h).

4.2 Message block format

Header

Message

Check code Delimiter

“Message block format” is allied to the “Message Type” in the “Header”. Refer to the section 6 “Message format” for more detail.

1）Get current parameter

The controller sends this message when you want to get the status of the monitor.

For the status that you want to get, specify the “OP code page” and “OP code”,

refer to “Appendix A. Operation code table”.
“Message format” of the “Get current					parameter” is as follows,
	STX	OP code page		OP code			ETX
		Hi	Lo	Hi		Lo

Refer to section 5.1 “Get current parameter from a monitor.” for more details.

2）Get Parameter reply

The monitor will reply with the status of the requested item specified by the controller in the “Get parameter message”.

“Message format” of the “Get parameter reply” is as follows,

	Result	OP code	OP code	Type	Max value	Current Value
STX		page					ETX

MSB

LSB

Refer to section 5.2 “Get parameter reply” for more details.

3）Set parameter

The controller sends this message to change a setting of the monitor.

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