![Nec MultiSync C551 [12/101] Check code](/img/pdf.png)
Nec MultiSync C551 [12/101] Check code
![Nec MultiSync C551 [12/101] Check code](/views2/1375369/page12/bgc.png)
(12/104)
4.3 Check code
Check code is the Block Check Code (BCC) between the Header and the End of Message except SOH.
D
n+1
= D
1
XOR D
2
XOR D
3
XOR ,,, D
n
XOR: Exclusive OR
Following is an example of a Check code (BCC) calculation.
Check code (BCC) D
17
= D
1
xor D
2
xor D
3
xor … xor D
14
xor D
15
xor D
16
= 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 xor 36h xor 34h xor 03h
= 77h
4.4 Delimiter
Packet delimiter code; ASCII CR(0Dh).
Header
Message
Check code
Delimiter
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
SOH D
0
Reserved D
1
Destination D
2
Source D
3
Type D
4
Length(H) D
5
Length(L) D
6
STX D
7
Data D
8
| |
| |
ETX D
n
Check code D
n+1
P P P P P P P P
Header
Message
Check
code
(BCC)
Delimiter
SOH
Reserved
Destination
Address
Source
Address
Message
type
Message length
STX
OP code
page
OP code
Set Value
ETX
01
30 41 30 45 30 41
02
30
30
31
30
30
30
36
34
03
77
0D
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D
8
D
9
D
10
D
11
D
12
D
13
D
14
D
15
D
16
D
17
D
18
Header
Message
Check code
Delimiter
Содержание
- External control nec lcd monitor 1
- Rev g5 index 1
- I application 4
- Connectors and wiring 5
- Ii preparation 5
- Lan control 5
- Rs 232c remote control 5
- Communication parameter 6
- Communication timing 6
- Iii communication specification 6
- Lan control 6
- Rs 232c remote control 6
- Command 7
- Command reply 7
- Communication format 7
- Get parameter 7
- Get parameter reply 7
- Monitor controller 7
- Save current setting command 7
- Save current setting command reply 7
- Set parameter 7
- Header block format fixed length 8
- Message block format 10
- Address 12
- Check code 12
- Delimiter 12
- Header message check code bcc 12
- Message 12
- Message length stx op code 12
- Op code set value etx 12
- Soh reserved destination 12
- Source address 12
- Get current parameter from a monitor 13
- Message type 13
- Get parameter reply 14
- Set parameter 16
- Set parameter reply 17
- Commands 18
- Save current settings 18
- Get timing report and timing reply 19
- Null message 20
- How to change the backlight setting 21
- Iv control commands 21
- Typical procedure example 21
- How to read the measurement value of the built in temperature sensors 24
- Brigtness 27
- Operation code op code table 27
- Picture 27
- Adjust 28
- Aspect 28
- Advanced 29
- Balance 29
- Audio delay 30
- Equlizer 30
- Schdule 30
- Schedule 30
- Custom detect 31
- Multi input 31
- Terminal setting 31
- Multi display 32
- Tile matrix 32
- Control 33
- Display protection 33
- Heat status 33
- Ir lock setting 33
- Motion 33
- Power on delay 33
- Screen saver 33
- Key lock setting 34
- Auto dimming 35
- Backlight setting 35
- Monitor information 35
- Power indicator 35
- Room light sensing 35
- System 35
- Power control procedure 37
- Power status read 37
- Power control 39
- Asset data read and write 41
- Asset data read request and reply 41
- Asset data write 42
- Date time read 44
- Date time read and write 44
- Date time write 46
- The controller requests the monitor to write date time 46
- This command is used in order to write the setting of the date time 46
- Schedule read 49
- Schedule read and write 49
- Schedule write 52
- Holiday read 58
- Holiday read and write 58
- Holiday write 60
- The controller requests the monitor to write date time 60
- This command is used in order to write the setting of holiday 60
- Weekend read 63
- Weekend read and write 63
- The controller requests the monitor to write the setting of weekend 65
- This command is used in order to write the setting of weekend 65
- Weekend write 65
- Self diagnosis 67
- Self diagnosis status read 67
- Serial no model name read 69
- Serial no read 69
- Model name read 71
- Security lock 73
- Security lock control 73
- Daylight saving read 75
- Daylight saving read write 75
- Daylight saving write 77
- Firmware version 79
- Firmware version read 79
- Input name 81
- Input name read 81
- Input name write 83
- Input name reset 85
- Power save mode 87
- Power save mode read 87
- Power save mode write 89
- Auto power save time read 91
- Auto power save time write 92
- Security enable 93
- Security enable read 93
- Security enable write 94
- Lan mac address 96
- Lan mac address read 96
- Emergency contents 98
- Emergency contents display 98
- Emergency contents delete 100
- All data are subject to change without notice 101
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