Delta Electronics AC Motor Drive VFD-G - Manual (Page 129)

Chapter 4 Parameters|
4-78 Revision July 2008, EG03, SW V1.06
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 00H Number of data 00H CRC CHK HIGH C1H
(Word) 02H (Word) 02H
Number of data
(Byte)
04 CRC CHK LOW 41H
The first 13H CRC CHK HIGH 04H
data 88H
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.
STX ‘:’
ADR 1 ‘0’
ADR 0 ‘1’
CMD 1 ‘0’
CMD 0 ‘3’
‘0’
‘4’
‘0’
Data starting address
‘1’