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Nec MultiSync V754Q [12/141] Check code
![Nec MultiSync V754Q [12/141] Check code](/views2/1375342/page12/bgc.png)
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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
= 7 7h
Head er
Mess age
Chec k co de
Deli mite r
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
SOH D
0
Rese rved D
1
Dest inat ion D
2
Sour ce D
3
Type D
4
Leng th(H ) D
5
Leng th(L ) D
6
STX D
7
Data D
8
| |
| |
ETX D
n
Chec k co de 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
Содержание
- External control nec lcd monitor 1
- Rev g4 index 1
- Connectors and wiring 4
- I application 4
- Ii preparation 4
- Rs 232c remote control 4
- Lan 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
- Delimiter 13
- Get current parameter from a monitor 14
- Message type 14
- Get parameter reply 15
- Set parameter 17
- Set parameter reply 18
- Commands 19
- Save current settings 19
- Get timing report and timing reply 20
- Null message 21
- How to change the backlight setting 22
- Iv control commands 22
- Typical procedure example 22
- How to read the measurement value of the built in temperature sensors 25
- Brigtness 28
- Operation code op code table 28
- Picture 28
- Adjust 1 29
- Aspect 30
- Advanced 31
- Rotation 31
- Audio delay 32
- Balance 32
- Equlizer 32
- Schdule 32
- Schedule 32
- Active picture 33
- Input select 33
- Multi input 33
- Picture position 33
- Custom detect 34
- Rotate 2 34
- Text ticker 34
- Equalizer 1 35
- Terminal setting 35
- Multi display 36
- Osd position 36
- Tile matrix 36
- Display protection 37
- Fan control 37
- Control 38
- Heat status 38
- Ir lock setting 38
- Motion 38
- Power on delay 38
- Screen saver 38
- Key lock setting 39
- Auto dimming 40
- Backlight 40
- Backlight setting 40
- Human sensing 40
- Input select 40
- Room light sensing 40
- Volume 40
- Internal pc 41
- Option 41
- Power indicator 41
- Compute module 42
- Monitor information 42
- Service menu 42
- System 42
- Picture 44
- Power control procedure 46
- Power status read 46
- Power control 48
- Asset data read and write 50
- Asset data read request and reply 50
- Asset data write 51
- Date time read 53
- Date time read and write 53
- Date time write 55
- The controller requests the monitor to write date time 55
- This command is used in order to write the setting of the date time 55
- Schedule read 58
- Schedule read and write 58
- Schedule write 62
- Holiday read 70
- Holiday read and write 70
- Holiday write 72
- The controller requests the monitor to write date time 72
- This command is used in order to write the setting of holiday 72
- Weekend read 75
- Weekend read and write 75
- The controller requests the monitor to write the setting of weekend 77
- This command is used in order to write the setting of weekend 77
- Weekend write 77
- Self diagnosis 79
- Self diagnosis status read 79
- Serial no model name read 81
- Serial no read 81
- Model name read 83
- Security lock 85
- Security lock control 85
- Direct tv chanel read reply 87
- Direct tv chanel read write 87
- Stx c 3 2 c majorch minorch etx 87
- Direct tv chanel write reply 88
- Stx c 3 2 d majorch minorch etx 88
- Daylight saving read 89
- Daylight saving read write 89
- Daylight saving write 91
- Firmware version 93
- Firmware version read 93
- Auto id 95
- Auto id execute 95
- Auto id complete 96
- Auto id reset 97
- Input name 98
- Input name read 98
- Input name write 100
- Input name reset 102
- Auto tile matrix 103
- Auto tile matrix execute 103
- Auto tile matrix complete 105
- Auto tile matrix monitors read 106
- Auto tile matrix monitors write 107
- Auto tile matrix reset 108
- Power save mode 109
- Power save mode read 109
- Power save mode write 111
- Auto power save time read 113
- Auto power save time write 114
- Auto standby time read 115
- Auto standby time write 116
- Setting copy 117
- Setting copy read 117
- Setting copy write 119
- Setting copy start 121
- Security enable 122
- Security enable read 122
- Security enable write 123
- Lan mac address 125
- Lan mac address read 125
- Proof of play 127
- Set proof of play operation mode 127
- Get proof of play current 129
- Get proof of play status 132
- Get proof of play number to number 134
- Setting lock control 136
- Setting lock of compute module 136
- Emergency contents 138
- Emergency contents display 138
- Emergency contents delete 140
- All data are subject to change without notice 141
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