Miyachi LMV1000, User Manual

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8: COMMUNICATION FUNCTION (OPTION)
LMV1000 (G)(E) AIR-COOLED LASER MARKER
990-541 8-3
2. Checksum
Checks if the data was received normally.
All data from STX, command, response and ETX are added on the binary code level, and the
least significant byte of the result becomes checksum.
The calculation result is converted into an ASCII character string (hexadecimal number, 2 bytes),
added as checksum and sent.
3. Expression of value
a. Sign
Plus Nothing is placed before value.
Minus
0x2D is placed before character.
Note: minus does not exist as a hexadecimal number.
b. Value
If not specified, the value is expressed as a decimal.
Decimal number Available ASCII codes are from 0x30 to 0x39.
Hexadecimal number
(used in checksum division)
0x41–0x46 are added to ASCII code available for the
decimal number.
Small alphabet letters are not available.
c. Data with decimals
Data with decimals are treated the same as data without decimals.
When setting the marking speed to 300mm/s
Send code: 0x02,0x53,0x50,0x57,0x33,0x30,0x30,0x03,0x39,0x32
ASCII code: STX S P W 3 0 0 ETX 9 2
STX Marking 300mm/s ETX Checksum
Speed change
Example expression of values
‘1’ for decimal number: 0x31
‘-1’ for decimal number: 0x2D,0x31
‘FFA0’ for hexadecimal number: 0x46,0x46,0x41,0x30
‘12.3A’ when the unit of value is 0.1A (LD current): 123