NEC RS-232C manual Message type, Get current Parameter from a monitor

5. Message type

5.1 Get current Parameter from a monitor.

STX	OP	code page		OP	code		ETX
	Hi		Lo	Hi		Lo
1st		2nd	-3rd		4th	–5th	6th

Send this message when you want to get the status of a monitor.

For the status that you want to get, specify the “OP code page” the “OP code”, refer to “Appendix A. Operation code table”.

1stbyte) STX: Start of Message

ASCII STX (02h)

2nd-3rdbytes) OP code page: Operation code page.

Specify the “OP code page” for the control which you want to get the status. Refer to “Appendix A Operation code table” for each item.

OP code page data must be encoded to ASCII characters.

Ex.) The byte data 02h must be encoded to ASCII characters '0' and '2' (30h and 32h). OP code page 02h -> OP code page (Hi) = ASCII '0' (30h)

OP code page (Lo) = ASCII '2' (32h)

Refer to Operation code table. (Appendix A) 4th–5thbytes) OP code: Operation code

Refer to “Appendix A Operation code table” for each item.

OP code data must be encoded to ASCII characters.

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

OP code 3Ah -> OP code (Hi) = ASCII '3' (33h)

OP code (Lo) = ASCII 'A' (41h)

Refer to Operation code table. 6thbyte) ETX: End of Message

ASCII ETX (03h)

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