Eaton MVX9000 - Table 5-5: Communication Protocol

Group 90 — Communications
MVX9000 User Manual 5-69
Descriptions of
Parameter Settings
Table 5-5: Communication Protocol
ASCII mode
RTU mode
STX
ADR
1
ADR
0
CMD
1
CMD
0 0 1 ...... N-1 N ETX
CHK
1
CHK
0
02H Address CMD Data characters 03H Check Sum
STX Start character: (3AH)
ADR 1 Communication address:
8-bit address consists of 2 ASCII codes
ADR 0
CMD 1
CMD 0
DATA (n-1) Contents of data:
Maximum: 20-word registers
........
DATA 0
LRC
CHK 1
LRC check sum:
8-bit check sum consists of 2 ASCII codes
LRC
CHK 0
END 1 END characters:
END 1 = CR (0DH), END 0 = LF (0AH)
END 0
START A silent interval of more than 10 ms
ADR Communication address:
8-bit address
CMD Command code:
8-bit command
DATA (n-1) Contents of data:
Maximum: 20-word registers
........
DATA 0
CRC CHK Low CRC check sum:
16-bit check sum consists of 2 8-bit characters
CRC CHK High
END A silent interval of more than 10 ms