Specifications

VFD-G Series
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5-52
LRC CHK 1 ‘9’
LRC CHK 0 ‘A’
END 1 CR
END 0 LF
RTU mode:
Command message: Response message: Error response message
ADR 01H ADR 01H ADR 01H
CMD 10H CMD 1 10H CMD 1 90H
Data
starting
05H Data
starting
05H Error 02H
address
00H
address
00H CRC CHK
LOW
CDH
Number of
data (Word)
00H Number of
data (Word)
00H CRC CHK
HIGH
C1H
02H 02H
Number of
data (Byte)
04 CRC CHK
LOW
41H
The first
13H
CRC CHK
04H
data
88H
HIGH
The second
0FH
data
A0H
CRC CHK
LOW
4DH
CRC CHK
HIGH
D9H
3.4 CHK (check sum)
ASCII mode:
LRC (Longitudinal Redundancy Check) is calculated by summing up, module 256,
the values of the bytes from ADR1 to last data character then calculating the
hexadecimal representation of the 2’s complement negation of the sum.
For example, reading 1 word from address 0401H of the AC drive with address 01H.