Crc Calculation (Checksum For Rtu) - Siemens ATC5300 Manual

General Information

1.13 CRC Calculation (CHECKSUM for RTU)

1.13 CRC Calculation (CHECKSUM for RTU)
CRC Calculation Workflow
XOR
n
POLY
(Generating polynomial = 1 + x
In the CRC 16, the 1
14
no
= exclusive or
= number of information bits
= calculation polynomial of the CRC 16 = 1010 0000 0000 0001
+ x
2 15
st
byte transmitted is the least significant one.
H ex F FF F = CRC
CRC x or B Y TE = CRC
n = 0
CRC rig ht s h ift
ca rry o ve r
CRC x or PO L Y = CRC
n = n + 1
n > 7
n o yes
n ex t B YTE
e nd mes sa ge
ye s
E nd
+ x )
16
Modbus Communication Protocol, Edition 03/2011, A5E02469001-02
ATC5300