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Moxa MD-226X [35/56] Idchk inverse data checksum
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MD-224 Hardware Manual Display Control Interface
5-5
CMD (Message Commands and Queries)
The command portion of the message will be one of the following values. For details, refer to the Display UART
Commands section.
CMD 0 CMD 1 CMD 2 ASCII Description
0x42 0x52 0x49 “BRI” Brightness Minimum Value
0x42 0x52 0x4C “BRL” Set LED Brightness of Touch Keypad
0x42 0x52 0x4D “BRM” Brightness Maximum Value
0x42 0x52 0x54 “BRT” User Brightness Control
0x42 0x52 0x55 “BRU” Glass Display Control - Brilliance Button
0x42 0x5A 0x5A “BZZ” Buzzer Control
0x44 0x4C 0x4E “DLN” Download ECDIS RGB package
0x44 0x4C 0x3F “DL?” ECDIS RGB package Query
0x44 0x32 0x4E “D2N” Download ECDIS RGB package(Second)
0x44 0x32 0x3F “D2?” ECDIS RGB package Query(Second)
0x45 0x54 0x43 “ETC” Elapsed Time Counter Query
0x47 0x4D 0x42 “GMB” Glass Display Control - Minimum Brightness
0x50 0x4F 0x54 “POT” Potentiometer Control
0x53 0x57 0x49 “SWI” Scalar Firmware Version Query
0x53 0x57 0x4B “SWK” Touch Keypad Firmware Version Query
0x41 0x44 0x46 “ADF” AC Input Power Detect Function
0x41 0x44 0x3F “AD?” Query AC Input Power Detect Function Status
0x44 0x44 0x46 “DDF” DC Input Power Detect Function
0x44 0x44 0x3F “DD?” Query DC Input Power Detect Function Status
0x42 0x4C 0x49 “BLI” Brightness Control
0x44
0x55
0x46
“DUF”
Disable UART Command Function
0x45 0x4D 0x53 “EMS” ECDIS Mode Select
0x43 0x54 0x3F “CT?” Current Temperature Query
0x53 0x53 0x3F “SS?” System Status Query
0x4D 0x43 0x43 “MCC” OSD Control Command
LEN (Data Length)
This byte defines the length of data in the message in bytes. The maximum value for this field is 74 bytes, and
the minimum value is 0.
IHCHK (Inverse Header Checksum)
This is a simple 8-bit checksum of the first six bytes of the packet (bytes 0 to 5) after a bitwise inversion has
been performed on them. This means the 8-bit sum (without carrying) of bytes 0, 1, 2, 3, 4, 5, and 6 is 0xFF.
IHCHK = 0xFF – [the sum of bits 0, 1, 2, 3, 4, 5]
DATA (Data Field)
The data field must have a LEN larger than 0; some commands do not have any data, so this field is left blank.
IDCHK (Inverse Data Checksum)
This is a simple 8-bit checksum of the data field, message bytes 7 to 7+ (LEN-1) after a bit-wise inversion has
been performed on each bit. This means that the IDCHK bit is equal to 0xFF, the sum of all data bits:
IDCHK = 0xFF – [the sum of bits 7 to 7+[LEN-1]]
If the message carries no data, then this checksum is not transmitted.
Содержание
- First edition september 2014 1
- Md 224 hardware manual 1
- Www moxa com product 1
- Copyright notice 2
- Disclaimer 2
- Md 224 hardware manual 2
- Technical support contact information 2
- Trademarks 2
- Www moxa com support 2
- Table of contents 3
- Introduction 5
- Available models 6
- Md 224 hardware manual introduction 6
- Optional accessories can be purchased separately 6
- Ordering information 6
- Overview 6
- Package checklist 6
- Display 7
- Front panel 7
- Md 224 hardware manual introduction 7
- Md 224 hardware specifications 7
- Physical characteristics 7
- Product features 7
- Serial interface 7
- Serial signals 7
- Environmental limits 8
- Important safety precaution 8
- Md 224 hardware manual introduction 8
- Power requirements 8
- Standards and certifications 8
- Warranty 8
- Hardware introduction 9
- Appearance and layout 10
- Dimensions 10
- Md 224 hardware manual hardware introduction 10
- Md 224 hardware manual hardware introduction 11
- Savvytouch display control buttons 11
- Hardware connection description 12
- Installation notes 13
- Md 224 hardware manual hardware connection description 13
- Placement notes 13
- Desktop mounting 14
- Md 224 hardware manual hardware connection description 14
- Md 224 hardware manual hardware connection description 15
- Panel mounting 15
- Md 224 hardware manual hardware connection description 16
- Vesa mounting 16
- Attention 17
- Grounding the md 224 series 17
- Md 224 hardware manual hardware connection description 17
- Powering on off the md 224 18
- Savvytouch display control buttons 18
- Ac input power on 19
- Brightness 19
- Dc input power off 19
- Dc input power on 19
- Ecdis mode 19
- Md 224 hardware manual hardware connection description 19
- System status 19
- Configuring the rs 232 422 485 serial ports 20
- Connecting data transmission cables 20
- Enabling the touch screen interface z models only 20
- Md 224 hardware manual hardware connection description 20
- Connecting video input cables 21
- Md 224 hardware manual hardware connection description 21
- Connecting the built in buzzer 22
- Md 224 hardware manual hardware connection description 22
- Touch function 23
- Installing touch function driver 24
- Md 224 hardware manual touch function 24
- Md 224 hardware manual touch function 25
- Md 224 hardware manual touch function 26
- Md 224 hardware manual touch function 27
- Md 224 hardware manual touch function 28
- Md 224 hardware manual touch function 29
- Performing screen calibration 29
- Md 224 hardware manual touch function 30
- Display control interface 31
- Connecting to the uart control interface 32
- Md 224 hardware manual display control interface 32
- Md 224 hardware manual display control interface 33
- Addr address 34
- Attn attention 34
- Command format details 34
- Uart command format 34
- Cmd message commands and queries 35
- Data data field 35
- Idchk 0xff the sum of bits 7 to 7 len 1 35
- Idchk inverse data checksum 35
- Ihchk 0xff the sum of bits 0 1 2 3 4 5 35
- Ihchk inverse header checksum 35
- Len data length 35
- Md 224 hardware manual display control interface 35
- Downloading rgb files 36
- Md 224 hardware manual display control interface 36
- Md 224 hardware manual display control interface 37
- A regulatory approval statement 38
- Regulatory approval statement 38
- B on screen display osd controls 39
- On screen display osd controls 39
- Image setting auto setup 40
- Md 224 hardware manual on screen display osd controls 40
- Opening the configuration screen 40
- Osd menu map and items explained 40
- Source auto source 40
- Color mode color temperature 41
- Color mode color temperature a user 41
- Image setting display 41
- Md 224 hardware manual on screen display osd controls 41
- Management communication 42
- Md 224 hardware manual on screen display osd controls 42
- Osd misc osd position 42
- Md 224 hardware manual on screen display osd controls 43
- Osd misc language 43
- Osd misc osd lock mode 43
- Osd misc preset save 43
- Md 224 hardware manual on screen display osd controls 44
- Service 44
- Service test pattern 44
- C display uart commands 45
- Display uart commands 45
- Bri brightness minimum value 46
- Brl set led brightness of touch keypad 46
- Brm brightness maximum value 46
- Brt user brightness control 46
- Examples 46
- Md 224 hardware manual display uart commands 46
- Osd control command 46
- Bru glass display control brightness button 47
- Bzz buzzer control 47
- Dln download ecdis rgb package 47
- Examples 47
- Md 224 hardware manual display uart commands 47
- D2 ecdis rgb package query second 48
- D2n download ecdis rgb package second 48
- Dl ecdis rgb package query 48
- Etc elapsed time counter query 48
- Examples 48
- Md 224 hardware manual display uart commands 48
- Adf ac input power detect function 49
- Examples 49
- Gmb glass display control minimum brightness 49
- Md 224 hardware manual display uart commands 49
- Pot potentiometer control 49
- Swi scalar firmware version query 49
- Swk touch keypad firmware version query 49
- Ad query ac input power detect function status 50
- Bli brightness control 50
- Dd query dc input power detect function status 50
- Ddf dc input power detect function 50
- Examples 50
- Md 224 hardware manual display uart commands 50
- Duf disable uart command function 51
- Ems ecdis mode select 51
- Examples 51
- Md 224 hardware manual display uart commands 51
- Ct current temperature query 52
- Examples 52
- Mcc osd control command 52
- Md 224 hardware manual display uart commands 52
- Ss system status query 52
- Md 224 hardware manual display uart commands 53
- Md 224 hardware manual display uart commands 54
- Md 224 hardware manual display uart commands 55
- Md 224 hardware manual display uart commands 56
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