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Emerson PNC001-A Series User Manual

Emerson PNC001-A Series
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PACSystems™ RX3i and RSTi-EP CPU Reference Manual Section 6
GFK-2222AK October 2019
Serial I/O, SNP & RTU Protocols 168
Transmitter CRC-16 Algorithm
Receiver
74
CRC-16 Algorithm
MSB
75
LSB
79
Flag
MSB
79
LSB
79
Flag
Initial Remainder
1111
1111
1111
1111
Rcvr CRC after data
1110
0010
0100
0001
XOR 1st data byte
0000
0000
0000
0001
XOR 1st byte Trns CRC
0000
0000
0100
0001
Current CRC
1111
1111
1111
1111
Current CRC
1110
0010
0000
0000
Shift 1
0111
1111
1111
1111
0
Shift 1
0111
0001
0000
0000
0
Shift 2
0011
1111
1111
1111
1
Shift 2
0011
1000
1000
0000
0
XOR Gen. Polynomial
1010
0000
0000
0001
Shift 3
0001
1100
0100
0000
0
Current CRC
1001
1111
1111
1110
Shift 4
0000
1110
0010
0000
0
Shift 3
0100
1111
1111
1111
0
Shift 5
0000
0111
0001
0000
0
Shift 4
0010
0111
1111
1111
1
Shift 6
0000
0011
1000
1000
0
XOR Gen. Polynomial
1010
0000
0000
0001
Shift 7
0000
0001
1100
0100
0
Current CRC
1000
0111
1111
1110
Shift 8
0000
0000
1110
0010
0
Shift 5
0100
0011
1111
1111
0
XOR 2nd byte Trns CRC
0000
0000
1110
0010
Shift 6
0010
0001
1111
1111
1
Current CRC
0000
0000
0000
0000
XOR Gen. Polynomial
1010
0000
0000
0001
Shift 1-8 yields
0000
0000
0000
0000
Current CRC
1000
0001
1111
1110
All errors for receiver final CRC-16 indicates transmission correct.
Shift 7
0100
0000
1111
1111
0
Shift 8
0010
0000
0111
1111
1
XOR Gen. Polynomial
1010
0000
0000
0001
Current CRC
1000
0000
0111
1110
XOR 2nd data byte
0000
0000
0000
0111
Current CRC
1000
0000
0111
1001
Shift 1
0100
0000
0011
1100
1
XOR Gen. Polynomial
1010
0000
0000
0001
Current CRC
1110
0000
0011
1101
Shift 2
0111
0000
0001
1110
1
XOR Gen. Polynomial
1010
0000
0000
0001
Current CRC
1101
0000
0001
1111
Shift 3
0110
1000
0000
1111
1
XOR Gen. Polynomial
1010
0000
0000
0001
Current CRC
1100
1000
0000
1110
Shift 4
0110
0100
0000
0111
0
Shift 5
0011
0010
0000
0011
1
XOR Gen. Polynomial
1010
0000
0000
0001
Current CRC
1001
0010
0000
0010
Shift 6
0100
1001
0000
0001
0
Shift 7
0010
0100
1000
0000
1
XOR Gen. Polynomial
1010
0000
0000
0001
Current CRC
1000
0100
1000
0001
Shift 8
0100
0010
0100
0000
1
XOR Gen. Polynomial
1010
0000
0000
0001
Transmitted CRC
1110
0010
0100
0001
E
2
4
1

Table of Contents

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Preview: Manual
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Emerson PNC001-A Series Specifications

General IconGeneral
BrandEmerson
ModelPNC001-A Series
CategoryController
LanguageEnglish

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