UINICS LV1000 Series, Instruction Manual

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≪About communication operation≫
１．Checksum
①Checksum computing range
（Command 1）
＠ × × Ｒ Ｄ １ △ △ CR
This range is object of a checksum.
（Command 2）
＠ × × Ｗ Ｐ １ ± ０ １ ２ ３ ４ ５ △ △ CR
This range is object of a checksum.
※The object of a checksum is a range from header character "＠" to before a checksum.
②Checksum computing type
A checksum computing type is 2 bytes of character string notation of the HEX value by MOD.
〔Example〕 In the case of ＠ ０ １ Ｒ Ｄ １ △ △ CR
(The indicated value demand of the ID number 01)
A commsnd is transposed to an ASCII code (hexadecimal number), and is added.
＠ ０ １ Ｒ Ｄ １
↓ ↓ ↓ ↓ ↓ ↓
40H ＋ 30H ＋ 31H ＋ 52H ＋ 44H ＋ 31H ＝ 168H
A value is transposed to a checksum.
168H is 168(hexadecimal number) Lower 2 figure 68 becomes a checksum.
If 68 is considered to be a character in order to consider it as 2 bytes of ASCII notation,
６ ８
↓ ↓
36H 38H
A transmitting command becomes "＠ ０ １ Ｒ Ｄ １ ６ ８ CR"
If the above is denoted by an ASCII code (hexadecimal code),
＠ ０ １ Ｒ Ｄ １ ６ ８ CR
↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
40H 30H 31H 52H 44H 31H 36H 38H 0DH