Delta DVP-ES2 User Manual download pdf (Page 607)

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4. Communications

Field name ASCII Hex

Bytes Count 10 31 30

Data Hi (T20) 00 30 30

Data Lo (T20) 01 30 31

Data Hi (T21) 00 30 30

Data Lo (T21) 02 30 32

Data Hi (T22) 00 30 30

Data Lo (T22) 03 30 33

Data Hi (T23) 00 30 30

Data Lo (T23) 04 30 34

Data Hi (T24) 00 30 30

Data Lo (T24) 05 30 35

Data Hi (T25) 00 30 30

Data Lo (T25) 06 30 36

Data Hi (T26) 00 30 30

Data Lo (T26) 07 30 37

Data Hi (T27) 00 30 30

Data Lo (T27) 08 30 38

Check sum(LRC) C8 43 38

END CR LF 0D 0A

4.2.3 LRC CHK (checksum)

LRC (Longitudinal Redundancy Check) is calculated by summing up the Hex values from ADR1 to last

data character then finding the 2’s-complement negation of the sum.

Example: Read the content of register at address 0401H. 01H+03H+04H+01H+00+01H = 0AH.

The 2’s-complement of 0AH: F6H

Field name ASCII Hex

STX : 3A

Slave Address

30 31

Command code

30 33

Starting data address Hi

30 34

Starting data address Lo

30 31

Number of data Hi

30 30

Number of data Lo

30 31

LRC checksum F6 46 36

END CR LF 0D 0A

4-5

1 2 ... 602 603 604 605 606 607 608 609 610 611 612 ... 701 702

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Delta DVP-ES2 User Manual Page 607

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