NEC X551UN, X551S, V801-TM, V651, V552-TM User Manual

...
EXTERNAL CONTROL NEC LCD Monitor
Rev.3.8
INDEX
I. Application
................................................................................3
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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(1/72)
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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(2/72)
I. Application
This document defines the communications method for control of the NEC LCD monitor, MultiSync P402 /P462 /P552 /P702 /V422 /V462 /V551 /V651 /V322 /V652 /V552 /X461S /X551S /X401S /X463UN /X551UN /V463 /V423 /X462S /X552S /X462UNV /V801 when using an external controller
.
(3/72)
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 Users manual.)
(4/72)
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 Users 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 wai t for a packet interval before next command is sent. The packet interval needs to be longer than 600msec for the LCD monitor.
(5/72)
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
Check Code
(6/72)
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
Destination
Destination
Destination
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)
nd
2
byte) Reserved: Reserved for future extensions.
On this monitor, it must be ASCII '0'(30h).
rd
3
byte) Destination: Destination equipment ID. (Receiver)
Specify a commands receivers 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
Destination Address
Monitor ID
Group ID
Address
Address
Monitor ID
Group ID
Address
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
(7/72)
'A'(41h). If you want to control all of the monitors which are connected by a daisy chain, specify
a destination address
(2Ah).
th
4
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.
th
5
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.
th
6
-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).
(8/72)
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.
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
2
Get Parameter reply
The monitor will reply with the status of the requested item specified by the controller
in the Get parameter message.
STX
Hi
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
3
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
4
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,
5
Command
Result
Hi Lo
STX
page
Hi
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
(9/72)
section 5.5 Commands message for more details.
6
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.
(10/72)
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
D
= D1 XOR D2 XOR D3 XOR ,,, D
n+1
n
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
D
0
Destination
Address
D1 D2 D3 D4 D5 D6 D7 D
Source
Address
Message
type
Message length STX
OP code
page
8
OP code Set Value ETX
D
D
D
D
D
9
10
11
12
D
13
14
D
15
Check
Delimiter
code
(BCC)
D
D
16
D18
17
Check code (BCC) D
= D1 xor D2 xor D3 xor xor D14 xor D15 xor D16
17
= 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
(11/72)
4.4 Delimiter
Packet delimite r code; ASCII CR(0Dh).
Header Message Check code
Delimiter
(12/72)
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
th
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.
st
1
byte) STX : Start of Message
ASCII STX (02h)
nd-3rd
2
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
4
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.
th
6
byte) ETX: End of Message
ASCII ETX (03h)
(13/72)
5.2 "Get parameter" reply
STX
st
1
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
th
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).
st
1
byte) STX: Start of Message
ASCII STX (02h)
nd-3rd
2
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
4
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.
th
6
–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).
th
8
-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).
th
10
-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)
th
14
-17thbytes) Current Value: (16bits) This returned value from the monitor is encoded to ASCII characters.
Ex.) '0','1','2' and '3' means 0123h (291)
th
18
byte) ETX: End of Message
ASCII ETX (03h)
(14/72)
5.3 Set parameter
th
STX
st
1
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 monitors adjustment and so on. The controller requests a monitor to change value.
st
1
byte) STX: Start of Message
ASCII STX (02h)
nd-3rd
2
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
4
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
6
bytes) Set value
: (
16bit) This data must be encoded to ASCII characters. Ex.) 0123h -> 1
2 3
4
th
10
byte) ETX: End of Message
st
(MSB) = ASCII '0' (30h)
nd
= ASCII '1' (31h)
rd
= ASCII '2' (32h)
th
(LSB) = ASCII '3' (33h)
ASCII ETX (03h)
(15/72)
Hi Lo Hi
5.4 "Set parameter" reply
STX
st
1
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.
st
1
byte) STX: Start of Message
ASCII STX (02h)
nd-3rd
2
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
4
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
6
bytes) OP code: Echoes back the Operation code for confirmation.
Reply data from the monitor is encoded to ASCII characters.
ETX
th
Ex.) OP code 1Ah -> OP code (Hi) = ASCII '1' (31h)
OP code (Lo) = ASCII 'A' (41h) Refer to Operation code table
th-9th
8
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.
th
10
-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)
th
14
-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)
th
18
byte) ETX: End of Message ASCII ETX (03h)
(16/72)
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
(17/72)
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
(18/72)
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
(19/72)
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
(20/72)
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
(21/72)
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
(22/72)
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