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NEC LCD4020-BK-AV - 40IN LCD 1200:1 1366X768 60HZ Dvi-d 8MS Manual
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NEC LCD4020-BK-AV - 40IN LCD 1200:1 1366X768 60HZ Dvi-d 8MS Manual

NEC LCD4020-BK-AV - 40IN LCD 1200:1 1366X768 60HZ Dvi-d 8MS Manual

Lcd4020/4620/5220/6520, m40/m46 external control commands
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See also: User Manual
External Control
1. Application
This document defines the communications method for control of the NEC LCD monitor, MultiSync
LCD4020/4620/5220/6520 and MULTEOS M40/46 when using an external controller

2. Connectors and wiring

Connector: D-Sub 9-pin
Cable: Cross (reversed) cable or null modem cable
(Please refer "Using the LCD with RS-232C" on each User's manual.)

3. Communication Parameter

(1) Communication system Asynchronous
(2) Interface
(3) Baud rate
(4) Data length
(5) Parity
(6) Stop bit
(7) Communication code ASCII

3.1 Communication timing

The controller should wait for a packet interval before next command is sent.
The packet interval needs to be longer than 600msec for the LCD monitor.
RS-232C
9600bps
8bits
None
1 bit
(1/40)
NEC LCD Monitor
.

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Summary of Contents for NEC LCD4020-BK-AV - 40IN LCD 1200:1 1366X768 60HZ Dvi-d 8MS

  • Page 1: Connectors And Wiring

    External Control NEC LCD Monitor 1. Application This document defines the communications method for control of the NEC LCD monitor, MultiSync LCD4020/4620/5220/6520 and MULTEOS M40/46 when using an external controller 2. Connectors and wiring Connector: D-Sub 9-pin Cable: Cross (reversed) cable or null modem cable (Please refer “Using the LCD with RS-232C”...

  • Page 2: Communication Format

    4. Communication Format Header Message Check Code Delimiter The command packet consists of four parts, Header, Message, Check code and Delimiter. Sequence of a typical procedure to control a monitor is as follows, [A controller and a monitor, two-way communication composition figure] Controller Monitor Get Parameter...

  • Page 3: Message Block Format

    “Monitor ID” to “Destination Address” conversion table is as follows, Monitor ID Destination Monitor ID Destination Address (ASCII) Address (ASCII) ‘A’(41h) ‘N’(4Eh) ‘B’(42h) ‘O’(4Fh) ‘C’(43h) ‘P’(50h) ‘D’(44h) ‘Q’(51h) ‘E’(45h) ‘R’(52h) ‘F’(46h) ‘S’(53h) ‘G’(47h) ‘T’(54h) ‘H’(48h) ‘U’(55h) ‘I’(49h) ‘V’(56h) ‘J’(4Ah) ‘W’(57h) ‘K’(4Bh) ‘X’(58h) ‘L’(4Ch)
  • Page 4 1 ÿ 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”...

  • Page 5: Check Code

    “Command reply message” format depends on each command. Refer to section 5.5 “Commands message” for more details. 4.5 Check code Header Message Check code Delimiter Check code is the Block Check Code (BCC) between the Header and the End of Message except SOH. Reserved Destination Source...

  • Page 6: Message Type

    5. Message type 5.1 Get current Parameter from a monitor. OP code page OP code –5 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.

  • Page 7: Set Parameter

    These bytes indicate a result of the requested commands as follows, 00h: No Error. 01h: Unsupported operation with this monitor or unsupported operation under current condition. This result code from the monitor is encoded to ASCII characters. Ex.) The byte data 01h is encoded to ASCII character '0' and '1' (30h and 31h). –5 bytes) OP code page: Operation code page.

  • Page 8: "Set Parameter" Reply

    This OP code page data must be encoded to ASCII characters. Ex.) The byte data 02h must be encoded to ASCII '0' and '2' (30h and 32h). Refer to the Operation code table. bytes) OP code: Operation code This OP code data must be encoded to ASCII characters. Ex.) OP code 1Ah ->...

  • Page 9: Save Current Settings

    ASCII '0''0' (30h, 30h): Set parameter ASCII '0''1' (30h, 31h): Momentary Like Auto Setup function, that automatically changes the parameter. bytes) 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) bytes) Requested setting Value: Echoes back the parameter for confirmation.

  • Page 10: Null Message

    Bit 5-2 Reserved (Don't care) Bit 1 1:Positive Horizontal sync polarity. 0:Negative Horizontal sync polarity. Bit 0 1:Positive Vertical sync polarity. 0:Negative Vertical sync polarity.  H Freq: Horizontal Frequency in unit 0.01kHz  V Freq: Vertical Frequency in unit 0.01Hz Ex.) When H Freq is '1''2''A''9' (31h, 32h, 41h, 39h), it means 47.77kHz.
  • Page 11 Delimiter CR (0Dh): End of packet Step 2. The monitor replies with current Brightness setting and capability to support this operation. Header Message Check code Delimiter SOH-'0'-'0'-Monitor ID-'D'-'1'-'2' STX-'0'-'0'-'0'-'0'-'1'-'0'-'0'-'0' -'0'-'0'-'6'-'4'-'0'-'0'-'3'-'2'-ETX Header SOH (01h): Start Of Header '0' (30h): Reserved '0' (30h): Message receiver is the controller. Monitor ID: Indicate a replying Monitor ID.

  • Page 12: How To Read The Measurement Value Of The Built-In Temperature Sensors

    Header Message Check code Delimiter SOH-'0'-'0'- Monitor ID -'F'-'1'-'2' STX-'0'-'0'-'0'-'0'-'1'-'0'—'0'-'0'-'0' -'0'-'6'-'4'-'0'-'0'-'5'-'0'-ETX Header SOH (01h): Start Of Header '0' (30h): Reserved '0' (30h): Message receiver is the controller. Monitor ID: Indicate a replying Monitor ID. Ex.) When this byte is set to 'A', the replying Monitor ID is '1'. 'F' (46h): Message Type is "Set parameter reply".
  • Page 13 Header SOH (01h): Start of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID which you want to get a value. Ex.) If Monitor ID is '1', specify 'A'. '0' (30h): Message sender is the controller. 'E' (45h): Message Type is "Set parameter command". '0'-'A' (30h, 41h): Message length is 10 bytes.
  • Page 14 SOH (01h): Start of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID which you want to get a value. Ex.) If Monitor ID is '1', specify 'A'. '0' (30h): Message sender is the controller. 'C' (43h): Message Type is "Get parameter". '0'-'6' (30h, 36h): Message length is 6 bytes.

  • Page 15: Power Control Procedure

    7. Power control procedure 7.1 Power status read 1) The controller requests the monitor to reply a current power status. Header Message Check code Delimiter SOH-'0'-Monitor ID-'0'-'A'-'0'-'6' STX-'0'-'1'-'D'-'6'-ETX Header SOH (01h): Start Of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID from which you want to get status. Ex.) If Monitor ID is '1', specify 'A'.

  • Page 16: Power Control

    CR (0Dh): End of packet 7.2 Power control 1) The controller requests the monitor to control monitor power. Header Message Check code Delimiter SOH-'0'-Monitor ID-'0'-'A'-'0'-'C' STX-'C'-'2'-'0'-'3'-'D'-'6'- '0'-'0'-'0'-'1'-ETX Header SOH (01h): Start Of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID which you want to change a setting. Ex.) If Monitor ID is '1', specify 'A'.

  • Page 17: Asset Data Read And Write

    Refer to the section 4.5 “Check code” for a BCC calculation. Delimiter CR (0Dh): End of packet 8. Asset Data read and write 8.1 Asset Data Read Request and reply This command is used in order to read Asset Data. 1) The controller requests the monitor to reply with Asset data.

  • Page 18: Asset Data Write

    Delimiter CR (0Dh): End of packet 8.2 Asset Data write This command is used in order to write Asset Data. 1) The controller requests the monitor to write Asset data. Header Message Check code Delimiter SOH-'0'-Monitor ID-'0'-'A'-N-N STX-'C'-'0'-'0'-'E'-'0'-'0'- Data(0)-Data(1)---Data(N)-ETX Header SOH (01h): Start Of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID in which you want to write data.

  • Page 19: Date & Time Read And Write

    Delimiter CR (0Dh): End of packet 9. Date & Time read and write 9.1 Date & Time Read This command is used in order to read the setting of Date & Time. 1) The controller requests the monitor to reply with the Date & Time. Header Message Check code...

  • Page 20: Date & Time Write

    '1'-'E'(31h, 45h): 30(=1Eh) '1'-'F'(31h, 46h): 31(=1Fh) WW: weekdays '0'-'0'(30h, 30h): Sunday '0'-'1'(30h, 31h): Monday '0'-'2'(30h, 32h): Tuesday '0'-'3'(30h, 33h): Wednesday '0'-'4'(30h, 34h): Thursday '0'-'5'(30h, 35h): Friday '0'-'6'(30h, 36h): Saturday HH: Hours '0'-'0'(30h, 30h): 0 '1'-'7'(31h, 37h): 23 (=17h) MN: Minutes '0'-'0'(30h, 30h): 0 '3'-'B' (33h, 42h): 59 (=3Bh) DS: Daylight saving (Summer time)
  • Page 21 '0'-'1'(30h, 31h): 1 '1'-'E'(31h, 45h): 30(=1Eh) '1'-'F'(31h, 46h): 31(=1Fh) WW: weekdays '0'-'0'(30h, 30h): Sunday '0'-'1'(30h, 31h): Monday '0'-'2'(30h, 32h): Tuesday '0'-'3'(30h, 33h): Wednesday '0'-'4'(30h, 34h): Thursday '0'-'5'(30h, 35h): Friday '0'-'6'(30h, 36h): Saturday HH: Hours '0'-'0'(30h, 30h): 0 '1'-'7'(31h, 37h): 23 (=17h) MN: Minutes '0'-'0'(30h, 30h): 0 '3'-'B' (33h, 42h): 59 (=3Bh)

  • Page 22: Schedule Read And Write

    '0'-'1'(30h, 31h): 1 '1'-'E'(31h, 45h): 30(=1Eh) '1'-'F'(31h, 46h): 31(=1Fh) WW: weekdays '0'-'0'(30h, 30h): Sunday '0'-'1'(30h, 31h): Monday '0'-'2'(30h, 32h): Tuesday '0'-'3'(30h, 33h): Wednesday '0'-'4'(30h, 34h): Thursday '0'-'5'(30h, 35h): Friday '0'-'6'(30h, 36h): Saturday HH: Hours '0'-'0'(30h, 30h): 0 '1'-'7'(31h, 37h): 23 (=17h) MN: Minutes '0'-'0'(30h, 30h): 0 '3'-'B' (33h, 42h): 59 (=3Bh)
  • Page 23 2) The monitor replies Schedule to the controller. Header Message Check code Delimiter SOH-'0'-'0'-Monitor ID-'B'-'1'-'6' STX-'C'-'3'-'1'-'3'-PG-ON HOURS-ON MIN-OFF HOURS-OFF MIN-INPUT-WD-FL-ETX Header SOH (01h): Start of Header '0' (30h): Reserved '0' (30h): Message receiver is the controller. Monitor ID: Indicate a replying Monitor ID. Ex.) When this byte is set to 'A', the replying Monitor ID is '1'.

  • Page 24: Schedule Write

    '0'-'1'(30h, 31h): Monday '0'-'4'(30h, 34h): Wednesday '0'-'F'(30h, 46h): Monday, Tuesday, Wednesday and Thursday '7'-'F'(37h, 46h): Monday to Sunday FL: Option bit 0: 0:once 1:Everyday bit 1: 0:once 1:Every week bit 2: 0:Disable 1:Enable '0'-'1'(30h, 31h): Disable, Everyday '0'-'4'(30h, 34h): Enable, once ETX (03h): End of Message Check code BCC: Block Check Code...
  • Page 25 '1'-'8'(31h, 38h): Off timer isn't set. OFF_MIN: Turn off time (minute) '0'-'0'(30h, 30h): 0 '3'-'B'(33h, 42h): 59 (=3Bh) '3'-'C'(33h, 43h): Off timer isn’t set. INPUT: Timer input '0'-'0'(30h, 30h): DVI '0'-'1'(30h, 31h): VGA '0'-'2'(30h, 32h): RGB/HV '0'-'3'(30h, 33h): HDMI '0'-'4'(30h, 34h): DVD/HD '0'-'5'(30h, 35h): VIDEO '0'-'6'(30h, 36h): S-VIDEO '0'-'7'(30h, 37h): TV (A)
  • Page 26 STX (02h): Start of Message 'C'-'3'-'1'-'4' (43h, 33h, 31h, 34h): Schedule writes reply command ST: Schedule Status command '0'-'0'(30h, 30h): No error '0'-'1'(30h, 31h): Error PG-ON HOURS-ON MIN-OFF HOURS-OFF MIN-INPUT-WD-FL: Schedule data PG: Program No. '0'-'0'(30h, 30h): Program No.1 '0'-'6'(30h, 36h): Program No.7 ON_HOUR: Turn on time (hour) '0'-'0'(30h, 30h): 00 '1'-'7'(31h, 37h): 23 (=17h)
  • Page 27 '0'-'4'(30h, 34h): Enable, once ETX (03h): End of Message Check code BCC: Block Check Code Refer to the section 4.5 “Check code” for a BCC calculation. Delimiter CR (0Dh): End of packet The controller requests the monitor to write Enable/Disable Schedule. Header Message Check code...

  • Page 28: Self-Diagnosis Status Read

    '0'-'6'(30h, 36h): Program No.7 EN: Enable /Disable '0'-'0'(30h, 30h): Disable '0'-'1'(30h, 31h): Enable ETX (03h): End of Message Check code BCC: Block Check Code Refer to the section 4.5 “Check code” for a BCC calculation. Delimiter CR (0Dh): End of packet 11.
  • Page 29 70: Standby-power digital +3.3V abnormality 71: Standby-power +5V abnormality 72: Main-power panel +12V abnormality 73: Main-power +2.5V abnormality 74: Main-power +1.8V abnormality 75: Standby-power analog +3.3V abnormality 76: Main-power analog +3.3V abnormality 77: Main-power digital +3.3V abnormality 78: Power-good signal +4.2V abnormality 80: Cooling fan-1 abnormality 81: Cooling fan-2 abnormality 82: Cooling fan-3 abnormality...

  • Page 30: Model Name Read

    Note.) The maximum data length that can be returned from the monitor at a time is 32bytes. Ex.) The byte data 20h is encoded as ASCII characters '2' and '0' (32h and 30h). Message STX (02h): Start of Message 'C'-'3'-'1'-'6' (41h, 33h, 31h, 36h): Serial No. reply command Data(0)-Data(1)----Data(n):Serial Number ...

  • Page 31: Security Lock Control

    ETX (03h): End of Message Check code BCC: Block Check Code Refer to the section 4.5 “Check code” for a BCC calculation. Delimiter CR (0Dh): End of packet 13. Security Lock 13.1 Security Lock Control This command sets the condition of security lock function to "LOCK" or "UNLOCK". If security pass codes 1st to 4th are matched with monitor resisted pass codes, then this command is executed, and reply no error status and a new condition.
  • Page 32 Delimiter CR (0Dh): End of packet 2) The monitor replies the result to the controller. Header Message Check code Delimiter SOH-'0'-'0'-Monitor ID-'B'-'0'-'A' STX-'C'-'3'-'1'-'D'-ST-EN-ETX Header SOH (01h): Start of Header '0' (30h): Reserved '0' (30h): Message receiver is the controller. Monitor ID: Indicate a replying Monitor ID. Ex.) When this byte is set to 'A', the replying Monitor ID is '1'.

  • Page 33: Operation Code (Op Code) Table

    Appendix A. Operation Code (OP code) Table Item OP code Parameter Remarks code page Brightness 0: dark MAX.: bright Contrast 0: low MAX.: high Sharpness 0: dull 106: sharp Black Level 0: dark 127: bright Tint Color 0: pale 127: deep Color Temperature 0:2600K 100K/step...
  • Page 34 Item OP code Parameter Remarks code page Clock Max. Clock Phase Max. H Resolution Max. V Resolution Max.: Zoom Base Zoom 3:16:9-ZOOM Mode 4:14:9-ZOOM 5:Dynamic 1:Off (Real) 2:Custom Zoom 1:100 ÿ 2:101 ÿ 201:300 ÿ Zoom 1:100 ÿ H-Expansion 2:101 ÿ 201:300 ÿ...
  • Page 35 Item OP code Parameter Remarks code page Off Timer 0: Off 1 hour/step 1: 1 hour 24: 24 hours Enable Schedule 0: No Mean 1: No.1 Enable 7: No.7 Enable Disenable Schedule 0: No Mean 1: No.1 Disable 7: No.7 Disable Menu tree reset 0: None Momentary...
  • Page 36 Item OP code Parameter Remarks code page Position MAX.: Information OSD 0:Disable information OSD 3-10: OSD timer [seconds] OSD Transparency 0: None 1: Off(Opaque) 2: TYPE1 3: TYPE2 Menu tree reset 0: None Momentary (OSD) 7: Reset OSD category Monitor ID 1-26:ID IR Control 1: Normal...
  • Page 37 Item OP code Parameter Remarks code page Motion 0: 0s(Off) 10s/step 90: 900s Side Border Color 0:Black MAX.:White Auto Brightness 0: Off 1: On Menu tree reset 0: None Momentary (Display Protection) 9: Reset Display Protection category Input Detect 0: First detect 1: Last detect 2: None 3: VIDEO detect...
  • Page 38 Item OP code Parameter Remarks code page Audio Input 1: Audio 1(PC) 2: Audio 2 3: Audio 3 4: HDMI 5: TV(A) 6: TV(D)/Option Volume UP/Down 0: whisper 100: loud Mute 0,2: UNMUTE 1: MUTE 0: None 1: Main 2: Sub 3: Main + Sub Sound 1: Off...
  • Page 39 Item OP code Parameter Remarks code page Select Temperature 1: Sensor #1 sensor 2: Sensor #2 3: Sensor #3 Readout a temperature Returned value is Read only 2's complement. Refer to section 6.2 (39/40)
  • Page 40 NEC Display Solutions, Ltd. makes no warranty for the use of its products and bears no responsibility for any errors or omissions which may appear in this document.

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