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NEC RS-232C user manual Message block format, Header, Check code Delimiter

Models: RS-232C

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4.2 Message block format

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

Hi

Lo

Hi

Lo

Hi

Lo

Hi

Lo

MSB

LSB

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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NEC RS-232C user manual Message block format, Header, Check code Delimiter

Contents

2. Connectors and wiring 2.1 RS-232C Remote control3.1 RS-232C Remote control 1. Application4. Communication Format 4.1 Header block format fixed length3rdbyte Destination Destination equipment ID. Receiver 4.2 Message block format HeaderCheck code Delimiter Message4.5 Check code Header MessageCheck code Delimiter4.6 Delimiter HeaderMessage Check code5.1 Get current Parameter from a monitor 5. Message type5.2 Get parameter reply 5.3 Set parameter 5.4 Set parameter reply 5.5.1 Save Current Settings 5.5 Commands5.5.2 Get Timing Report and Timing reply 6.1. How to change the “Brightness” setting 6. Typical procedure example5.5.3 NULL Message SOH-0-0-Monitor ID-D-1-2 Page Step 1. Select a temperature sensor which you want to read Delimiter CR 0Dh End of packet 7. Power control procedure 7.1 Power status read7.2 Power control 1 The controller requests the monitor to control monitor power8. Asset Data read and write 8.1 Asset Data Read Request and reply8.2 Asset Data write 9. Date & Time read and write 9.1 Date & Time Read9.2 Date & Time Write This command is used in order to write the setting of the Date & Time1 The controller requests the monitor to write Date & Time Message STX 02h Start of Message 10. Schedule read and write This command is used in order to read the setting of the Schedule10.1 Schedule Read 0-830h, 38h Message length Message STX 02h Start of Message 0-130h,31h VGA 0-230h,32h RGB/HV 0-330h,33h DVI 0-530h,35h Video1 Page 10.2 Schedule Write This command is used in order to write the setting of the Schedule 1 The controller requests the monitor to write ScheduleEX 0-130h, 31h Monday 0-430h, 34h Wednesday 2 The monitor replies a data for confirmation Page SOH-0-0-Monitor ID-B-0-C STX-C-3-1-5-ST-PG-EN-ETX1 The controller requests the monitor to write Schedule bit 4 Friday bit 5 Saturday bit 6 Sunday EX 0-130h, 31h Monday 1-731h, 37h 23 =17h 1-831h, 38h Off timer isnt set 11. Self diagnosis This command is used in order to read the Self-diagnosis status11.1 Self-diagnosis status read SOH 01h Start of Header 0 30h Reserved This command is used in order to read a serial number This command is used in order to read the Model Name12. Serial No. & Model Name Read 12.1 Serial No. Read13. Security Lock 13.1 Security Lock ControlSOH-0-MonitorID-0-A-1-0 STX-C-2-1-D-EN-P1-P2-P3-P4-ETXP1 Security Pass code 1st 0-030h, 30h P2 Security Pass code 2nd 0-030h, 30hC-3-1-D 43h, 33h, 31h, 44h Security Lock Control reply command ST-EN Lock condition result data ST Status 0-030h, 30h No error0-130h, 31h Error ETX 03h End of Message Check code BCC Block Check CodeAppendix A. Operation Code OP code TableADJUST AUDIO SCHDULEPage OSD timer seconds Menu tree resetInformation OSD OSD TransparencyAdvanced Option7 Autooffset Terminate Temperature sensor Carbon footprintRevised at Mar.25/2010 All data are subject to change without notice50/50