Delta VFD-L-I Series, User Manual

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Chapter 4 Parameters
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VFD-L-I Series
4-54 Revision July 2009, SW V1.1
ASCII mode:
Command message: Response message:
STX ‘:’ STX ‘:’
‘0’ ‘0’ ADR 1
ADR 0
‘1’
ADR 1
ADR 0
‘1’
‘0’ ‘0’ CMD 1
CMD 0
‘6’
CMD 1
CMD 0
‘6’
‘0’ ‘0’
‘1’ ‘1’
‘0’ ‘0’
Data address
‘0’
Data address
‘0’
‘1’ ‘1’
‘7’ ‘7’
‘7’ ‘7’
Data content
‘0’
Data content
‘0’
‘7’ ‘7’ LRC CHK 1
LRC CHK 0
‘1’
LRC CHK 1
LRC CHK 0
‘1’
CR CR END 1
END 0
LF
END 1
END 0
LF
RTU mode:
Command message:
Response message:
ADR 01H ADR 01H
CMD 06H CMD 06H
01H 01H
Data address
00H
Data address
00H
17H 17H
Data content
70H
Data content
70H
CRC CHK Low 86H CRC CHK Low 86H
CRC CHK High 22H CRC CHK High 22H
3.4 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