NEC V651-PC, V551-PC, V462-PC, V422-PC User Manual

EXTERNAL CONTROL NEC LCD Monitor

Rev.2.6

INDEX

I. Application

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II. Preparation

2. Connectors and wiring

2.1 RS-232C Remote control

2.2 LAN control

III. Communication specification

3. Communication Parameter

3.1 RS-232C Remote control

3.2 LAN control

3.3 Communication timing

4. Communication Format

4.1 Header block format (fixed length)

4.2 Message block format

4.3 Check code

4.4 Delimit er

5. Message type

5.1 Get curr ent Parameter fro m a mo n i tor.

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5.2 "Get paramet e r " reply

5.3 Set parameter

5.4 "Se t para meter" reply

5.5 Commands

5.5.1 Save Current Settings

5.5.2 Get Ti m i ng Report and Timing reply.

5.5.3 NULL Message

IV. Control Commands

6. Typical procedure example

6.1. How to change the “Backlight” setting.

6.2. How to read the measurement value of the built-in temperature sensors.

6.3. Operation Code (OP code) Table

7. Power control procedure

7.1 Po wer status read

7.2 Po wer control

8. Asset Data read and write

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8.1 As s e t Data Read Request and reply

8.2 As s e t Data write

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9. Date & Time read and write

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9.1 Date & Time Read

9.2 Date & Time W r ite

10. Schedule read and write

10.1 S chedule Read

10.2 S chedule Write

11. Self diagnosis

11.1 S elf-diagnosis status read

12. Serial No. & Model Name Read

12.1 S er ial No. Read

12.2 Model Name Read

13. Security Lock

13.1 S ecurity Lock Control

14. Direct TV Chanel Read & Write

14.1 Di rect T V Chanel Read & Reply

14.2 Di rect T V Chanel Write & Reply

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I. Application

This document defines the communications method for control of the NEC LCD monitor, MultiSync P402 /P462 /P552 /P702 /V422 /V462 /V551 /V651 /X461S /X551S /X463UN /X551UN when using an external controller

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II. Preparation

2. Connectors and wiring

2.1 RS-232C Remote control

Connector: 9-pin D-Sub

Cable: Cross (reversed) cable or null modem cable

(Please refer “Controlling the LCD monitor via RS-232C Remote control” on User’s manual.)

2.2 LAN control

Connector: RJ-45 10/100 BASE-T

Cable: Category 5 or higher LAN cable

(Please refer “Controlling the LCD monitor via LAN control” on User’s manual.)

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III. Communication specification

3. Communication Parameter

3.1 RS-232C Remote control

(1) Communication system Asynchronous (2) Interface RS-232C (3) Baud rate 9600bps (4) Data length 8bits (5) Parity None (6) Stop bit 1 bit (7) Communication code ASCII

3.2 LAN control

(1) Communication system TCP/IP (Internet protocol suite) (2) Interface Ethernet (CSMA/CD) (3) Communication layer Transport layer (TCP) * Using the payload of TCP segment. (4) IP address (Default) 192.168.0.10 * If you need to change, Please refer “Network settings” on User’s manual. (5) Port No. 7142 (Fixed)

(Note) The monitor will disconnect the connection if no packet data is received for 15 minutes. And the controller (PC) has to re-connect to control the monitor again , after 15 minutes or more.

3.3 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.

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Header

Delimiter

Header

Delimiter

Header

Delimiter

Header

Delimiter

Header

Delimiter

Header

Delimiter

Header

Delimiter

Header

Delimiter

Header

Delimiter

Header

Delimiter

4. Communication Format

Header Message Check Code Delimiter

The command packet consists of four parts, Header, Message, Check code and Delimiter.

Recommended sequence of a typical procedure to control a monitor is as follows,

[A controller and a monitor, two-way communication composition figure]

■

For the general command (see the part "6.3. Operation Code (OP code) Table”)

Get Parameter

Message

Check Code

Get Parameter Reply

Message

Check Code

Set Parameter

Message

Check Code

Set Parameter Reply

Message

Check Code

Get Parameter

Message

Check Code

Get Parameter Reply

Message

Check Code

Save Current Setting Command

Message

Check Code

Save Current Setting Command Reply

Message

Check Code

Monitor Controller

The controller send s command to get a value from the monitor that you want to change.

The monitor replies a current va lue of the requested item.

The controller sends commands to set an adjusted value.

The monitor replies to the controller for confirmation.

The controller sends command to get a value for confirmation.

The monitor replies an adjusted value.

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

The mo nitor replies to the controller for confirmation.

■

For the special command (see the part 7 to 14. and 5.5.2)

Command

Message

Command Reply

Message

Check Code

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Monitor Controller

The control does not suitable for above fixed protocol; use the proper command for each control. Please refer section 5.5 and section 7 to 13.

The monitor replies a proper message defined for each control.

Destination

4.1 Header block format (fixed length)

Header

Message Check code Delimiter

SOH

1st 2nd 3rd 4th 5th 6th -7th

Reserved '0'

Destination Source

Message Type

Message Length

1stbyte) SOH: Start of Header

ASCII SOH (01h)

byte) Reserved: Reserved for future extensions.

On this monitor, it must be ASCII '0'(30h).

byte) Destination: Destination equipment ID. (Receiver)

Specify a commands receiver’s address.

The controller sets the “MONITOR ID” or “GROUP ID” of the monitor controlled in here. On the reply, the monitor sets ‘0’ (30h), always.

“MONITOR ID”, “GROUP ID” to “Destination Address” conversion table is as follows,

Monitor ID

1 41h(‘A’) 26 5Ah(‘Z’) 51 73h 76 8Ch 2 42h(‘B’) 27 5Bh 52 74h 77 8Dh 3 43h(‘C’) 28 5Ch 53 75h 78 8Eh 4 44h(‘D’) 29 5Dh 54 76h 79 8Fh 5 45h(‘E’) 30 5Eh 55 77h 80 90h 6 46h(‘F’) 31 5Fh 56 78h 81 91h 7 47h(‘G’) 32 60h 57 79h 82 92h 8 48h(‘H’) 33 61h 58 7Ah 83 93h 9 49h(‘I’) 34 62h 59 7Bh 84 94h 10 4Ah(‘J’) 35 63h 60 7Ch 85 95h 11 4Bh(‘K’) 36 64h 61 7Dh 86 96h 12 4Ch(‘L’) 37 65h 62 7Eh 87 97h 13 4Dh(‘M’) 38 66h 63 7Fh 88 98h 14 4Eh(‘N’) 39 67h 64 80h 89 99h 15 4Fh(‘O’) 40 68h 65 81h 90 9Ah 16 50h(‘P’) 41 69h 66 82h 91 9Bh 17 51h(‘Q’) 42 6Ah 67 83h 92 9Ch 18 52h(‘R’) 43 6Bh 68 84h 93 9Dh 19 53h(‘S’) 44 6Ch 69 85h 94 9Eh 20 54h(‘T’) 45 6Dh 70 86h 95 9Fh 21 55h(‘U’) 46 6Eh 71 87h 96 A0h 22 56h(‘V’) 47 6Fh 72 88h 97 A1h 23 57h(‘W’) 48 70h 73 89h 98 A2h 24 58h(‘X’) 49 71h 74 8Ah 99 A3h 25 59h(‘Y’) 50 72h 75 8Bh 100 A4h ALL 2Ah(‘*’)

Group ID

A 31h(‘1’) D 34h(‘4’) G 37h(‘7’) J 3Ah(‘:’) B 32h(‘2’) E 35h(‘5’) H 38h(‘8’) C 33h(‘3’) F 36h(‘6’) I 39h(‘9’)

Destination Address

Monitor ID

Group ID

Address

Monitor ID

Group ID

Address

Monitor ID

Group ID

Address

Destination Address

Ex.) If you want to control a monitor that has the "ID No." as '1', specify a destination address

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'A'(41h). If you want to control all of the monitors which are connected by a daisy chain, specify

a destination address ‘

＊

’(2Ah).

byte) Source: Source equipment ID. (Sender)

Specify a sender address.

The controller must be ‘0’ (30h). On the reply, the monitor sets the own MONITOR ID in here.

byte) 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.

-7th bytes) 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).

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Lo Hi Lo

Hi Lo Hi Lo Hi Lo

4.2 Message block format

“Message block format” is allied to the “Message Type” in the “Header”.

Refer to the section 6 “Message format” for more detail.

）

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



）

Get Parameter reply

The monitor will reply with the status of the requested item specified by the controller

in the “Get parameter message”.

STX



STX

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

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

Result

Lo Hi Lo Hi Lo Hi Lo MSB

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

OP code page OP code Hi Lo Hi Lo

OP code

page

Header



OP code Type Max value Current Value

Message

parameter” is as follows,

Check code Delimiter

ETX

LSB MSB

ETX

LSB

）

Set parameter

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

Message format of the “Set parameter” is as follows,

OP code

STX



）

Set Parameter reply

The monitor replies with this message for a confirmation of the “Set parameter message”.

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



）

Command

Result

Hi Lo

STX

page

Refer to section 5.3 “Set parameter” for more details.

OP code

Refer to section 5.4 “Set parameter reply” for more details.

OP code Set Value

page

OP code

MSB

ETX

LSB

Type Max value

MSB

Requested setting

Value

LSB MSB LSB

ETX

“Command message” format depends on each command. Usually, this “com mand message” is used for some non-slider controls and some special operations,

such as “Save current settings”, “Get timing report”, “power control”, “Schedule”, etc. Refer to

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section 5.5 “Commands message” for more details.

）

Command reply The monitor replies to a query from the controller. “Command reply message” format depends on each command.

Refer to section 5.5 “Commands message” for more details.

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n+1

4.3 Check code

Header Message

Check code is the Block Check Code (BCC) between the Header and the End of Message except SOH.

27 26 25 24 23 22 21 20 SOH D0 Reserved D1 Destinatio n D2 Source D3 Type D4 Length(H) D5 Length(L) D6 STX D7 Data D8 | | | | ETX Dn Check code D

P P P P P P P P

= D1 XOR D2 XOR D3 XOR ,,, D

n+1

XOR: Exclusive OR

Check code

Delimiter

Following is an example of a Check code (BCC) calculation.

Header Message

SOH Reserved

01 30 41 30 45 30 41 02 30 30 31 30 30 30 36 34 03 77 0D

Destination

Address

D1 D2 D3 D4 D5 D6 D7 D

Source

Address

Message

type

Message length STX

OP code

page

OP code Set Value ETX

Check

Delimiter

code

(BCC)

D18

Check code (BCC) D

= D1 xor D2 xor D3 xor … xor D14 xor D15 xor D16

= 30h xor 41h xor 30h xor 45h xor 30h xor 41h

xor 02h xor 30h xor 30h xor 31h xor 30h xor 30h xor 30h xo r 36h xor 34h xor 03h

= 77h

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4.4 Delimiter

Packet delimite r code; ASCII CR(0Dh).

Header Message Check code

Delimiter

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5. Message type

5.1 Get current Parameter from a monitor.

STX

OP code page Hi Lo Hi Lo

1st 2nd-3rd 4th–5th 6

OP code

ETX

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

For the status that you want to get, specify the “OP co de page” the “ OP co de”, refer t o A. Operati on code table”.

byte) STX : Start of Message

ASCII STX (02h)

nd-3rd

bytes) 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)



“Appendix



Refer to Operation code table. (Appendix A)

th–5th

bytes) 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.

byte) ETX: End of Message

ASCII ETX (03h)

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5.2 "Get parameter" reply

STX

Result OP code page

OP code

Hi Lo Hi Lo Hi Lo Hi Lo MSB

2nd-3rd 4th–5th 6th –7th 8th -9

Type Max value Current Value

10th -13th 14th -17th 18th

LSB MSB

LSB

The monitor replies with a current value and the status of the requested it em (operation code).

byte) STX: Start of Message

ASCII STX (02h)

nd-3rd

bytes) Result code.

These bytes indicate a result of the requested commands as follows,

00h: No Error.

01h: Unsupported operation with this monito r or unsupported operation u nder 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).

th–5th

bytes) OP code page: Operation code page.

These bytes indicate a replying item's OP code page. This returned value from the monitor is encoded to ASCII characters.

Ex.) The byte data 02h is encoded to ASCII character '0' and '2' (30h and 32h).

ETX

Refer to the operation code table.

–7thbytes) OP code: Operation code

These bytes indicate a replying item's OP code.

This returned value from the monitor is encoded to ASCII characters. Refer to the operation code table.

Ex.) The byte data 1Ah is encoded to ASCII character '1' and 'A' (31h and 41h).

-9thbytes) Type: Operation type code

00h: Set parameter

01h: Momentary

Like the Auto Setup function which automatically changes the parameter. This returned value from the monitor is encoded to ASCII characters.

Ex.) The byte data 01h is encoded to ASCII character '0' and '1' (30h and 31h).

-13thbytes) Max. value: Maximum value which monitor can accept. (16bits)

This returned value from the monitor is encoded to ASCII characters. Ex.) '0','1','2' and '3' means 0123h (291)

-17thbytes) Current Value: (16bits) This returned value from the monitor is encoded to ASCII characters.

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

byte) ETX: End of Message

ASCII ETX (03h)

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5.3 Set parameter

STX

OP code page

OP code

Hi Lo Hi Lo MSB

2nd-3rd 4th-5th 6th-9th 10

Set Value

LSB

ETX

Send this message to change monitor’s adjustment and so on. The controller requests a monitor to change value.

byte) STX: Start of Message

ASCII STX (02h)

nd-3rd

bytes) OP code page: Operation code page 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.

th-5th

bytes) OP code: Operation code This OP code data must be encoded to ASCII characters.

Ex.) OP code 1Ah -> OP code (Hi) = ASCII '1' (31h) OP code (Lo) = ASCII 'A' (41h)

Refer to the Operation code table.

th-9th

bytes) Set value

: (

16bit) This data must be encoded to ASCII characters. Ex.) 0123h -> 1

2 3

byte) ETX: End of Message

(MSB) = ASCII '0' (30h)

= ASCII '1' (31h)

= ASCII '2' (32h)

(LSB) = ASCII '3' (33h)

ASCII ETX (03h)

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Hi Lo Hi

5.4 "Set parameter" reply

STX

Result OP code page

Lo Hi Lo Hi Lo MSB

OP code

Type Max value

LSB MSB

Requested setting

Value

LSB

2nd-3rd 4th-5th 6th-7th 8th-9th 10th-13th 14th -17th 18

The Monitor echoes back the parameter and status of the requested operation code.

byte) STX: Start of Message

ASCII STX (02h)

nd-3rd

bytes) Result code

ASCII '0''0' (30h, 30h): No Error. ASCII '0''1' (30h, 31h): Unsupported operation with this monitor or unsupported operation under

current condition.

th-5th

bytes) OP code page: Echoes back the Operation code page for confirmation.

Reply data from the monitor is encoded to ASCII characters. Ex.) OP code page 02h -> OP code page = ASCII '0' and '2' (30h and 32h)

Refer to Operation code table.

th-7th

bytes) OP code: Echoes back the Operation code for confirmation.

Reply data from the monitor is encoded to ASCII characters.

ETX

Ex.) OP code 1Ah -> OP code (Hi) = ASCII '1' (31h)

OP code (Lo) = ASCII 'A' (41h) Refer to Operation code table

th-9th

bytes) Type: Operation type code ASCII '0''0' (30h, 30h): Set parameter

ASCII '0''1' (30h, 31h): Momentary Like Auto Setup function, that automatically changes the parameter.

-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)

-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)

byte) ETX: End of Message ASCII ETX (03h)

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5.5 Commands

"Command message format" depends on each command section 7 to 13.

Some commands are shown with usage. Refer to

5.5.1 Save Current Settings.

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

STX



ASCII: 01h-30h-41h-30h-41h-30h-34h-02h-30h-43h-03h-CHK-0Dh

The monitor replies the packet for confirmation as follows;

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

Command code '0' 'C'

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

Complete "Save Current setting" command packet as follows;

SOH-'0'-'A'-'0'-'A'-'0'-'4'-STX-'0'-'C'-ETX-CHK- CR

ETX

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5.5.2 Get Timing Report and Timing reply.

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

STX



ASCII: 01h-30h-41h-30h-41h-30h-34h-02h-30h-37h-03h-CHK-0Dh

The monitor replies status as the following format;

STX



Command code '0' '7'

Send "07"(30h, 37h) as Get Timing Report command. Complete "Get Timing Report" command packet as follows;

SOH-'0'-'A'-'0'-'A'-'0'-'4'-STX-'0'-'7'-ETX-CHK- CR

Command SS H Freq. V Freq.

'4' 'E' Hi Lo MSB LSB MSB LSB

SS: Timing status byte Bit 7 = 1: Sync Frequency is out of range.

Bit 6 = 1: Unstable count 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.

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.

ETX

0:Negative Vertical sync polarity.

ETX

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5.5.3 NULL Message

STX

The NULL message returned from the monitor is used in the following cases;



01h-30h-30h-41h-42h-30h-34h-02h-42h-45h-03h-CHK-0Dh SOH-'0'-'0'-'A'-'B'-'0'-'4'-STX-'B'-'E'-ETX-CHK- CR

Command code 'B' 'E'

To tell the controlle r that the monitor does n ot have any answer to give to the host (not ready or not expected)

Following operations need a certain time for to execute, so the monitor will return this message wh en another message is received during execution.



Power ON, Power OFF, Auto Setup, Input, PIP Input, Auto Setup and Factory reset.

Complete "NULL Message" command packet as follows;

ETX

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IV. Control Commands

6. Typical procedure example

The following is a sample of procedures to control the monitor, these are examples of "Get parameter",

"Set parameter" and "Save current settings".

6.1. How to change the “Backlight” setting.

Step 1. The controller requests the Monitor to reply with the current brightness setting and capability

to support this operation. (Get parameter)

Header Message Chec k code Delimiter

SOH-'0'-Mo nitor ID-'0'-'C '-'0'-'6' STX-'0'-'0 '-'1'-'0'-ETX BCC CR

Header

SOH (01h): Start Of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID from 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 command". '0'-'6' (30h, 36h): Message length is 6 bytes.

Message

STX (02h): Start of Message '0'-'0' (30h, 30h): Operation code page number is 0. '1'-'0' (31h, 30h): Operation code is 10h (in the OP code page 0). 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

Step 2. The monitor replies with current Backlight setting and capability to support this operation.

Header Message Check code

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.

Ex.) When this byte is set to 'A', the replying Monitor ID is '1'. 'D' (44h): Message Type is "Get parameter reply". '1'-'2' (31h, 32h): Message length is 18 bytes.

Message

STX (02h): Start of Message

'0'-'0' (30h, 30h): Result code. No error. '0'-'0' (30h, 30h): Operation code page number is 0. '1'-'0' (31h, 30h): Operation code is 10h (in the page 0). '0'-'0' (30h, 30h): This operation is "Set parameter" type. '0'-'0'-'6'-'4' (30h, 30h, 36h, 34h): Backlight max value is 100(0064h). '0'-'0'-'3'-'2' (30h, 30h, 33h, 32h): Current Backlight setting is 50(0032h) . ETX (03h): End of Message

Check code

BCC: Block Check Code Refer to the section 4.5 “Check code” for a BCC calculation.

Delimiter

BCC CR

Delimiter

(20/71)

CR (0Dh): End of packet

Step 3. The controller request the monitor to change the Backlight setting

Header Message

SOH-'0'-Monitor ID-'0'-'E'-'0'-'A' STX-'0'-'0'-'1'-'0'-'0'-'0'-'5'-'0'-ETX BCC CR

Header

SOH (01h): Start Of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID of which you want to change a setting.

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.

Message

STX (02h): Start of Message

'0'-'0' (30h, 30h): Operation code page number is 0. '1'-'0' (31h, 30h): Operation code is 10h (in the page 0). '0'-'0'-'5'-'0' (30h, 30h, 35h, 30h): Set Backlight setting 80(0050h). 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

Step 4. The monitor replies with a message for confirmation.

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".

'1'-'2' (31h, 32h): Message length is 18 bytes.

Message

STX (02h): Start of Message

'0'-'0' (30h, 30h): Result code. No error. '0'-'0' (30h, 30h): Operation code page number is 0. '1'-'0' (31h, 30h): Operation code is 10h (in the page 0). '0'-'0' (30h, 30h): This operation is "Set parameter" type. '0'-'0'-'6'-'4' (30h, 30h, 36h, 34h): Backlight max value is 100(0064h). '0'-'0'-'5'-'0' (30h, 30h, 35h, 30h): Received a Backlight setting was 80(0050h) . 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



Repeat Step 1 and Step 2, if you need to check the Backlight setting. (Recommended)

Step 5. Request the monitor to store the Backlight setting. (Save Current Settings Command)

Check

code

BCC CR

Delimiter

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Header Message Check code Delimiter

SOH-'0'-Monitor ID-'0'-'A'-'0'-'4' STX-'0-'C'-ETX BCC CR

Header

SOH (01h): Start Of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID which you want to store the setting.

Ex.) If Monitor ID is '1', specify 'A'. '0' (30h): Message sender is the controller. 'A' (41h): Message type is "Command". '0'-'4' (30h, 34h): Message length is 4 bytes.

Message

STX (02h): Start of Message '0'-'C' (30h, 43h): Command code is 0Ch as "Save current settings". 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

(22/71)

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