SMART Sympodium IM-150, Руководство по установке, Страница: 37 / 63

Sympodium IM–150 Installation Guide 29
Data Format
With the command data format, there are two formatting options: with checksum bytes and
without checksum bytes. Use the following symbols as the start and end bytes:
•
With Checksum:
START Byte = <
END Byte = >
•
Without Checksum:
START Byte = [
END Byte = ]
Option 1 (without command checksum bytes)
Without
Checksum
START Byte
CMD
Byte
1
CMD
Byte
2
CMD
Byte
3 …
CMD
Byte
n
Without
Checksum
END Byte
Option 2 (with command checksum byte)
With
Checksum
START Byte
CMD
Byte
1
CMD
Byte
2
CMD
Byte
3 …
CMD
Byte
n
Checksum
High Nibble
(0h to Fh)
Checksum
Low Nibble
(0h to Fh)
With
Checksum
END Byte
Command List
Command Parameter Definition Description
SRC ? = Query
0 = Source 1 (PC1)
1 = Source 2 (PC2)
2 = Source 3 (Auxiliary) Source (Command or Status
Query)
DIA 0? = Hardware Model Number Query
(e.g. <DIA H8A CF>)
1? = Firmware Version Number Query
(e.g. <DIA v2.11 46>)
2? = Firmware Checksum Query
(e.g. <DIA D189 F4>)
3? = Module Status Query
(e.g. <DIA 1F 85>) Diagnostic Query
Refer to the next page for further
information about the DIA 3
command.
If the device is processing a query when you send the DIA 3 command (module status
query), it may appear to be inoperable. Try repeating the DIA 3 command several times.
Use the following table to understand the module status query reply:
Hex Response Checksum Description
1F 85 All devices are working well.
1E 84 RS-232_A device is not working.
1D 83 RS-232_B device is not working.
1B 81 RGB_A device is not working.
17 76 RGB_B device is not working.
0F 84 Audio device is not working.