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Table C.3 CRC-16 Checksum Calculation Example
Description
Calculation
Overflow
Description
Calculation
Overflow
Initial Value (FFFFH)
1111 1111 1111 1111
Function Code 03H
0000 0000 0000 0011
Address 02H
0000 0000 0000 0010
XOR w result
1000 0001 0011 1101
XOR w initial value
1111 1111 1111 1101
Shift 1
0100 0000 1001 1110
1
Shift 1
0111 1111 1111 1110
1
XOR w A001H
1010 0000 0000 0001
XOR w A001H
1010 0000 0000 0001
XOR result
1110 0000 1001 1111
XOR result
1101 1111 1111 1111
Shift 2
0111 0000 0100 1111
1
Shift 2
0110 1111 1111 1111
1
XOR w A001H
1010 0000 0000 0001
XOR w A001H
1010 0000 0000 0001
XOR result
1101 0000 0100 1110
XOR result
1100 1111 1111 1110
Shift 3
0110 1000 0010 0111
0
Shift 3
0110 0111 1111 1111
0
Shift 4
0011 0100 0001 0011
0
Shift 4
0011 0011 1111 1111
1
XOR w A001H
1010 0000 0000 0001
XOR w A001H
1010 0000 0000 0001
XOR result
1001 0100 0001 0010
XOR result
1001 0011 1111 1110
Shift 5
0100 1010 0000 1001
0
Shift 5
0100 1001 1111 1111
0
Shift 6
0010 0101 0000 0100
1
Shift 6
0010 0100 1111 1111
1
XOR w A001H
1010 0000 0000 0001
XOR w A001H
1010 0000 0000 0001
XOR result
1000 0101 0000 0101
XOR result
1000 0100 1111 1110
Shift 7
0100 0010 1000 0010
1
Shift 7
0100 0010 0111 1111
0
XOR w A001H
1010 0000 0000 0001
Shift 8
0010 0001 0011 1111
1
XOR result
1110 0010 1000 0011
XOR w A001H
1010 0000 0000 0001
Shift 8
0111 0001 0100 0001
1
XOR result
1000 0001 0011 1110
XOR w A001H
1010 0000 0000 0001
Perform operations with next data (function code)
XOR result
1101 0001 0100 0000
CRC-16
1101 0001 0100 0000
D140H
Continue from here with next data.
n
Response Data
To be sure that the data is valid, perform a CRC-16 calculation on the response message data as described above. Compare
the result to the CRC-16 checksum that was received within the response message. Both should match.
C.8 Message Format
364
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
7/16/2008-13:23
Содержание V1000
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Страница 37: ...2 2 Mechanical Installation This Page Intentionally Blank 36 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 63: ...3 12 Wiring Checklist This Page Intentionally Blank 62 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 221: ...5 11 U Monitor Parameters This Page Intentionally Blank 220 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 273: ...7 5 Drive Replacement This Page Intentionally Blank 272 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 287: ...8 6 Connecting an Option Card This Page Intentionally Blank 286 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 297: ...A 6 Drive Derating Data This Page Intentionally Blank 296 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 379: ...C 13 Self Diagnostics This Page Intentionally Blank 378 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
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