Omron VARISPEED L7 User Manual

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The following example clarifies the calculation method. It shows the calculation of a CRC-16 code with the
slave address 02H (0000 0010) and the function code 03H (0000 0011). The resulting CRC-16 code is D1H
for the lower and 40H for the higher byte. The example calculation in this example is not done completely
(normally data would follow the function code).
Calculations Overflow Description
1111 1111 1111 1111 Initial value
0000 0010 Address
1111 1111 1111 1101 ExOr Result
0111 1111 1111 1110 1 Shift 1
1010 0000 0000 0001
1101 1111 1111 1111 ExOr Result
0110 1111 1111 1111 1 Shift 2
1010 0000 0000 0001
1100 1111 1111 1110 ExOr Result
0110 0111 1111 1111 0 Shift 3
0011 0011 1111 1111 1 Shift 4
1010 0000 0000 0001
1001 0011 1111 1110 ExOr Result
0100 1001 1111 1111 0 Shift 5
0010 0100 1111 1111 1 Shift 6
1010 0000 0000 0001
1000 0100 1111 1110 ExOr Result
0100 0010 0111 1111 0 Shift 7
0010 0001 0011 1111 1 Shift 8
1010 0000 0000 0001
1000 0001 0011 1110 ExOr Result
0000 0011 Function Code
1000 0001 0011 1101 ExOr Result
0100 0000 1001 1110 1 Shift 1
1010 0000 0000 0001
1110 0000 1001 1111 ExOr Result
0111 0000 0100 1111 1 Shift 2
1010 0000 0000 0001
1101 0000 0100 1110 ExOr Result
0110 1000 0010 0111 0 Shift 3
0011 0100 0001 0011 1 Shift 4
1010 0000 0000 0001
1001 0100 0001 0010 ExOr Result
0100 1010 0000 1001 0 Shift 5
0010 0101 0000 0100 1 Shift 6
1010 0000 0000 0001
1000 0101 0000 0101 ExOr Result
0100 0010 1000 0010 1 Shift 7
1010 0000 0000 0001
1110 0010 1000 0011 ExOr Result
0111 0001 0100 0001 1 Shift 8
1010 0000 0000 0001
1101 0001 0100 0000 ExOr Result
D1H 40H CRC-16 Result
Higher Lower
Byte Byte

Omron VARISPEED L7 Specifications

General

Brand	Omron
Model	VARISPEED L7
Category	Inverter
Language	English