SVF-MN Series Frequency Inverter Operation Manual Chapter 6 Communication Protocol
141
Slave
address
Function
code
Read
byte
quantity
The
first
data
high
byte
The
first
data
low
byte
;
;
;
The
n
data
high
byte
The
n
data
low
byte
Parit
y bit
high
byte
Parit
-y bit
low
byte
(
3
)
For example
The upper machine read two data from the frequency inverter, and
the two data is setting frequency and output frequency, the address is
2102H, 2103H, and the upper machine should send the data to
frequency inverter as follows;
Slave
address
Function
code
Parameter
address
high byte
Parameter
address
low byte
Data
high
byte
Data
low
byte
CRC
Parity
bit
high
byte
CRC
Parity
bit
low
byte
01 03 21 02 00
02
6F
F7
The setting frequency of frequency inverter is 50.00Hz
(corresponding 16 system data is 1388H). Bus voltage is 540v
(corresponding 16 system data is 1518H).The frequency inverter
feedbacks to the data to upper machine: n=2 is the number of
variable quantity.
Slave
address
Function
code
Read
number
of byte
(
2*n
)
The
first
data
high
byte
The
first
data
low
byte
The
second
data
high
byte
The
second
data
low
byte
CRC
Parity
bit high
byte
CRC
Parity
bit high
byte
01 03 04 13
88
13 88 73 CB
6.3.4 Write operation function code
Function code Realized function: change the frequency inverters’