Zest ZQ280, User Manual

Page: 26 / 29

Modbus
address
Function code
Parameter
number high
Parameter
Number low
High word
count
Word count
low
CRC
low order
CRC
high
0x01 0x06 0x00 0x08 0x07 0XD0 0x81 0xF7
Answer:
Modbus
address
Function
code
Parameter
number high
Parameter
number low
High word
count
word count
low
CRC
low order
CRC
high
0x01 0x06 0x00 0x08 0x07 0XD0 0x81 0xF7
Example 3: Reset the parameter to the factory value , set 1 in F0-17 , and restore the parameter to the factory value
Modbus
address
Function
code
Parameter
number high
Parameter
number low
High word
count
word count
low
CRC
low order
CRC
high
0x01 0x06 0x00 0x11 0x00 0X01 0x81 0xF7
Answer:
Modbus
address
Function
code
Parameter
number high
Parameter
Number low
High
word
count
Word count
low
CRC
low
order
CRC
high
0x01 0x06 0x00 0x0A 0x07 0XD0 0x81 0xF7
Data frame field description :
Frame header
START
Idles greater than 35 character transfer times
Slave address
ADR
Communication address range: 1 to 247;
Command
code CMD
03: Read slave parameters; 06: Write slave parameters ;
10 : Write a group of parameters continuously
Parameter
address H
The parameter address inside the inverter , expressed in hexadecimal; it is divided into parameter
type and non-parameter type (such as running state parameters, running commands, etc.)
parameters, etc., see the address definition for details. When transmitting, the high byte comes first
and the low byte follows.
Parameter
address L
Number of
parameters H
The number of parameters to be read in the frame, if it is 1, it means to read 1 parameter. When
transmitting, the high byte comes first and the low byte follows. When the command code is 0 3 , this
protocol can only rewrite one parameter at a time, and there is no such field.
Number of
parameters L
Data H
The data to be answered, or the data to be written, is transmitted with the high byte in front and the
low byte in the back.
Data L
CRC
CHK low
Detection value: CRC16 check value. When transmitting, the low byte comes first and the high byte
follows.
For the calculation method, please refer to the description of CRC check in this section.
CRC
CHK high
END
3.5 characters
5.Parameter parameter address marking rules
The rule is represented by the parameter group number and label as the parameter address:
High byte: 00~0F (group F), 70 ( group d )
Low byte: 00~FF
For example: to access parameter F3-12, the access address of the parameter is represented as 0x030C;
Note: FP group: parameters can neither be read nor changed;
Group d : can only be read, parameters cannot be changed.
Some parameters cannot be changed when the inverter is in the running state; some parameters cannot be changed
regardless of the state of the inverter; when changing the parameters, pay attention to the range, unit and related
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