8000m Series
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8.7 Example
RTU mode, read 2 data from 0008H (Parameters F0.08~F0.09)
The request command is:
START
T1-T2-T3-T4
NODE ADDRESS
01H
COMMAND 03H
DATA ADDRESS HIGH BYTE
00H
DATA ADDRESS LOW BYTE
08H
DATA NUMBER HIGH BYTE
00H
DATA NUMBER LOW BYTE
02H
CRC LOW BYTE
45
CRC HIGH BYTE
C9
END
T1-T2-T3-T4
The reply is:
START
T1-T2-T3-T4
NODE ADDRESS
01H
COMMAND 03H
BYTE NUMBER
04H
DATA 0008H HIGH BYTE
13H
DATA 0008H LOW BYTE
88H
DATA 0009H HIGH BYTE
00H
DATA 0009H LOW BYTE
00H
CRC LOW BYTE
7E
CRC HIGH BYTE
9D
END
T1-T2-T3-T4
In this example, the VFD’s data settings of 0008H~0009H (F0.08~F0.09) is read
by upper monitor: Data 0008H =1388H, which can be transfer to decimal number
5000 that means parameter F0.08 is set as 50.00Hz; While data 0009H =0000H
