Sanken SVCO6, Инструкция по эксплуатации, Страница: 267 / 326

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7
7-4 Serial Communication Function
3) Message from computer to inverter (BINARY format)
Item Name Content
①
HD Start code Message transmission start code(―@‖
：
ASCII code 40H)
②
IN Inverter No.
Inverter number
Example: 14H for inverter number 20
③
OP Command code
Inverter command code
④⑤
DT Setting data
Data sent to inverter
Example: For data 123
④
→00H
⑤
→7BH
※
Added only to a command code when there is applicable setting data.
⑥
SUM Checksum
Add the two‘s complement of the lower byte of the BINARY sum of data
①
-
⑤
.
(See Reference 2)
Reference 2: As an example of checksum calculation for BINARY format, set 50.00 Hz on the first inverter
①
Start code =40H
：
―@‖
②
Inverter No. =01H
③
Command =4FH
：
―O‖
④
Data (upper byte) =13H
：
50.00Hz→5000D→1388H
⑤
Data (lower byte) =88H
：
⑥
Sum of
①
-
⑤
=12BH
：
40H
＋
01H
＋
4FH
＋
13H
＋
88H=12BH
⑦
Lower byte of 12BH =2BH
：
⑧
Two’s complement of 2BH =D5H
：
Checksum
4) Message from inverter to computer (BINARY format)
Item Name Content
①
HD Start code Message transmission start code(―@‖
：
ASCII code 40H)
②
IN Inverter No.
Inverter number
Example: 14H for inverter number 20
③
OP Command code
Inverter command code
④
ST Status code
By each command, the contents of the status codes are different. Please refer to
details of message formation for more information.
⑤
SUN Checksum
Add the two‘s complement of the lower byte of the BINARY sum of data
①
-
④
.
(Same as the Reference 2 in the preceding paragraph)
① ② ③
④ ⑤
HD IN OP ST SUM