Chapter 4 Parameters
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4-66
Revision May 2008, ME14, SW V3.04
RTU Mode:
Command message:
Response message:
ADR 01H
ADR 01H
CMD 10H
CMD 10H
Starting data
00H
Starting data
00H
address 11H
address 11H
Number of data
00H
Number of data
00H
(count by word)
02H
(count by word)
02H
Number of data
(count by byte)
04H
CRC Check Low
11H
The first data
13H
CRC Check High
CDH
content 88H
The second data
0FH
content A0H
CRC Check Low
B2H
CRC Check High
49H
3.5 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 ‘:’
‘0’
ADR 1
ADR 0
‘1’
‘0’
CMD 1
CMD 0
‘3’
‘0’
‘4’
‘0’
Starting data address
‘1’
‘0’
‘0’
‘0’
Number of data
‘1’
‘F’
LRC CHK 1
LRC CHK 0
‘6’
CR
END 1
END 0
LF
01H+03H+04H+01H+00H+01H=0AH,
the 2’s-complement negation of 0AH is
F6
H.
Summary of Contents for VFD-M Series
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Page 12: ...Chapter 1 Introduction Revision May 2008 ME14 SW V3 04 1 3 1 1 4 External Parts and Labels ...
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Page 21: ...Chapter 2 Installation and Wiring 2 4 Revision May 2008 ME14 SW V3 04 Good Not allowed ...
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Page 149: ...Appendix B Accessories B 4 Revision May 2008 ME14 SW V3 04 ...