15
2 Protocol description
2.7 Checksum (CRC16)
The checksum (CRC16) serves to recognize transmission errors.
If an error is detected during evaluation, the corresponding
device will not respond.
Calculation
procedure
Example
Data request: Read two words, starting at address 0x00CE
(CRC16 = 0xA592)
Response: (CRC16 = 0xADF5)
CRC = 0xFFFF
CRC = CRC XOR ByteOfMessage
For (1 to 8)
CRC = SHR(CRC)
if (flag shifted right = 1)
then
else
CRC = CRC XOR
0xA001
while (not all ByteOfMessage processed);
07
03
00
CE
00
02
A5
92
CRC16
07
03
04
00
00
41
C8
AD
F5
Word 1
Word 2
CRC16
Содержание 701061
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