Duxe.ru VICSION VS500 101
AppendixⅠMODBUS protocol.
1. Communication Configuration
F9.0=X1XX, select MODBUS-RTU protocol.
F9.0=X0XX, select SUNFAR self-defined protocol.
Notes: X indicates that bit is an arbitrary number.
2. Communication Function
To complete the communication between the upper computer and inverter, including sending the operating command
to the inverter, setting running frequency, rewriting the function code parameters as well as reading the running status,
monitoring parameters, fault information and function code parameters of the inverter
3. Protocol Format
MODBUS-RTU Format
ADU
>3.5 character
tran>s3m.5is×siÖo·nû´«
inteÊrvä¼ al ät¸iômÊe ±¼ä
´SaÓdl»advrúeeµssØÖ·
F¹u¦ncÄtiÜoÂn ë
code
DaÊtaý¾Ý
CRC
caCliRbrCaÐtio£nÑé
>3.5 character
tra>n3s.m5i×ssÖi·oûn´«
inÊteär¼ valä¸tôimÊe±¼ä
FraÖm¡eÆstÊðar¼t
PDU
FraÖme¡½enáÊdø
4. Protocol Format Explanation
4.1 Slave address
0 is broadcast address, slave address can be set from 1~247.
4.2 PDU part
(1) Function code 03: for reading the functional parameters, running status, monitoring parameters and fault
information of multiple inverters, which can read maximum 6 address-contiguous inverter parameters.
Transmission by the master:
PDU part
03
Register start address, Register start address, Number of registers,
Number of
high-order
low-order
high-order
registers, low-order
Data length (Byte)
1
1
1
1
1
Response by the slave:
PDU part
03
Number of bytes read (2*number of registers)
Content read
Data length (Byte)
1
1
2*number of registers
(2) Function code 06: for rewriting the operating command, running frequency and functional parameters of single
inverter.
Transmission by the master:
PDU part
06
Register start
Register start
address, high-order address, low-order
Register data,
high-order
Register data,
low-order
Data length (Byte)
1
1
1
1
1
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