Delta DVP-ES2 - Manual (Page 607)

4 . C o m m u n i c a t i o n s
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 01 30 31
Command code 03 30 33
Starting data address Hi 04 30 34
Starting data address Lo 01 30 31
Number of data Hi 00 30 30
Number of data Lo 01 30 31
LRC checksum F6 46 36
END CR LF 0D 0A
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