NEC RS-232C Commands, Save Current Settings, Get Timing Report and Timing reply, Msb Lsb Etx

ASCII '0''0' (30h, 30h): Set parameter

ASCII '0''1' (30h, 31h): Momentary

Like Auto Setup function, that automatically changes the parameter. 10th-13thbytes) Max. value: Maximum value that monitor can accept. (16bits)

Reply data from the monitor is encoded to ASCII characters.

Ex.) '0''1''2''3' means 0123h (291)

14th -17thbytes) Requested setting Value: Echoes back the parameter for confirmation. (16bits) Reply data from the monitor is encoded to ASCII characters.

Ex.) '0''1''2''3' means 0123h (291) 18thbyte) ETX: End of Message

ASCII ETX (03h)

5.5 Commands

"Command message format" depends on each command. Some commands are shown with usage. Refer to section 7 to 13.

5.5.1 Save Current Settings.

The controller requests for the monitor to store the adjusted value.

STX

Command code

'0' 'C'

ETX

Send "OC"(30h, 43h) as Save current settings command.

Complete "Save Current setting" command packet as follows; ASCII: 01h-30h-41h-30h-41h-30h-34h-02h-30h-43h-03h-CHK-0Dh

SOH-'0'-'A'-'0'-'A'-'0'-'4'-STX-'0'-'C'-ETX-CHK- CR The monitor replies the packet for confirmation as follows;

SOH-'0'-'0'-'A'-'B'-'0'-'6'-STX-'0'-'0'-'0'-'C'-ETX-CHK- CR

5.5.2 Get Timing Report and Timing reply.

The controller requests the monitor to report the displayed image timing.

STX

Command code

'0' '7'

ETX

Send "07"(30h, 37h) as Get Timing Report command.

Complete "Get Timing Report" command packet as follows; ASCII: 01h-30h-41h-30h-41h-30h-34h-02h-30h-37h-03h-CHK-0Dh

SOH-'0'-'A'-'0'-'A'-'0'-'4'-STX-'0'-'7'-ETX-CHK- CR The monitor replies status as the following format;

STX

Command		SS			H Freq.			V Freq.
'4'	'E'	Hi	Lo	MSB		LSB	MSB		LSB

ETX

SS: Timing status byte

Bit 7 = 1: Sync Frequency is out of range.

Bit 6 = 1: Unstable count

(10/50)