DATA
(
n - 1
)
Data: function code parameter address,number of function
code parameter ,value of function code parameter
DATA
(
n - 2
)
……………
DATA 0
CRC CHK high- order
Check value: CRC
CRC CHK low- order
END
T1- T2-T3-T4( 3. 5 bytes of transmission time)
Chapter 8 Appendix
ADR
01H
CMD
03H
Starting address high- order
F0H
Starting address low- order
02H
Number of data high- orde
00H
Number of data low- order
02H
CRC CHK low- order
Need to calculate CRC,CHK
CRC CHK high- order
Command code (CMD): 03H , read N words ( at most continuously read 12 wor-
ds) . For example, the inverter of which slave address is 01, memory starting
address is F02, when continuously reading two words, and then the host comm-
and information as below
:
ADR
01H
CMD
03H
Number of bytes high-order
00H
Number of bytes low-order
04H
Data address F002H high- order
00H
Data address F002H low- order
00H
Data address F003H high- order
00H
Data address F003H low- order
01H
CRC CHK low- order
Need to calculate CRC,CHK
CRC CHK high- order
Slave response information
When F13.05 set to 0:
-204-
C
h
a
p
te
r
8
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