8
* Data: ASCII-HEX
Ex) when data value is 3000: 3000
→
‘0’ ‘B’ ‘B’ ‘8’ h
→
30h 42h 42h 38h
* Error code: ASCII (20h ~ 7Fh)
* Receive/Send buffer size: Receive= 39 byte, Send=44 byte
* Monitor register buffer: 8 Word
* SUM: to check the communication error
SUM= ASCII-HEX format of lower 8 bit of (Inverter No. + CMD + DATA)
Ex) Command Message (Request) for reading one address from address “9000”
ENQ
Inverter No.
CMD
Address
Number of address
SUM
EOT
05h “01” “R”
“3000”
“1”
“AC” 04h
1
2
1
4 1 2
1
SUM = ‘0’ + ‘1’ + ’R’ + ‘3’ + ‘0’ + ‘0’ + ‘0’ + ‘1’
= 30h + 31h + 52h + 33h + 30h + 30h + 30h + 31h
= 1A7h (Except Control value: ENQ, ACK, NAK, etc.)
5.1.2. Detailed Read protocol
z
Request for Read: Request for reading Word data of the successive ‘n’ number from address
“XXXX”
ENQ
Inverter No.
CMD
Address
Number of Address
SUM
EOT
05h
“01” ~ “1F”
“R”
“XXXX”
“1” ~ “8” = n
“XX”
04h
1 2
1
4 1
2
1
Total byte = 12, The quotation marks (“ ”) mean character.
z
Acknowledge Response:
ACK
Inverter No.
CMD
Data
SUM
EOT
06h
“01” ~ “1F”
“R”
“XXXX”
“XX”
04h
1 2
1
N * 4
2 1
Total byte = 7 + n * 4 = Max. 39
z
Negative
Acknowledge Response:
NAK
Inverter No.
CMD
Error code
SUM
EOT
15h
“01” ~ “1F”
“R”
“**”
“XX” 04h
1 2
1
2
2
1
Total byte = 9
5.1.3. Detailed Write protocol
z
Request for Write:
ENQ
Inverter No.
CMD
Address
Number of Address
SUM
EOT
EOT
05h
“01” ~ “1F”
“W”
“XXXX”
“1” ~ “8” = n
“XXXX…”
“XX”
04h
1
2
1
4
1
n * 4
2
1
Total byte = 12 + n * 4 = Max. 44
