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M-7065 User’s Manual
Ver2.0, Dec. /200
8
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19
Checksum Calculation:
1. Calculate the ASCII code sum of all the characters in the
command/response string except for the carriage return
character (CR).
2. The checksum is equal to the sum masked by 0FFh.
Example:
Command string: $012(CR)
1. Sum of the string = “$”+”0”+”1”+”2” =
24h+30h+31h+32h = B7h
2. Therefore the checksum is B7h, and so
CHKSUM = “B7”
3. The command string with the checksum = $012B7(CR)
Response string: !01200600(CR)
1. Sum of the string =
“!”+”0”+”1”+”2”+”0”+”0”+”6”+”0”+”0” =
21h+30h+31h+32h+30h+30h+36h+30h+30h = 1AAh
2. Therefore the checksum is AAh, and so
CHKSUM = “AA”
3. The response string with the checksum
= !01200600AA(CR)
Note:
All characters should be in upper case.
Содержание M-7065
Страница 7: ...M 7065 User s Manual Ver2 0 Dec 2008 7 1 2 Pin Assignment...
Страница 42: ...M 7065 User s Manual Ver2 0 Dec 2008 42 Related Commands Section 2 2...
Страница 106: ...M 7065 User s Manual Ver2 0 Dec 2008 106 Supported modules M 7065 Valid starting channel DI Count Value 0x0000 0x0003...