VD500 Series Inverter User Manual Communication Protocol
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Fd Communication
Fd-00
Baud Rate
0: 300BPS
1: 600BPS
2: 1200BPS
3: 2400BPS
4: 4800BPS
5: 9600BPS
6: 19200BPS
7: 38400BPS
8: 57600BPS
9: 115200BPS
5
○
This parameter is used to set data transfer rate between the PC and inverter.Note that set the baud
rate of upper machine and converter must agree, otherwise, the communication can't be.The faster
the baud rate, the greater the communication.
Fd-01
Data Format
0: No verify
（
8-N-2
）
1: Even verify
（
8-E-1
）
2: Odd verify
（
8-O-1
）
3: 8-N-1
0
○
Set the data format of upper machine and converter must agree, otherwise, the communication to,
otherwise, the communication can't be.The faster the baud rate, the greater the communication.
Fd-02
Local Address
0~247, 0 is broadcast address
1
○
When the machine address set to 0, namely for the broadcast address, PC broadcasting functions.
The machine address has uniqueness (except the broadcast address), which is to achieve the basis
of upper machine and inverter peer-to-peer communications.
Fd-03
Response Delay
0ms~200ms
2ms
○
Response delay: refers to the frequency converter data to accept the end up to a machine to send
data in the middle of the interval of time.If the response time delay is less than the system processing
time, the response time delay will be subject to system processing time, processing time, such as
response time delay is longer than system after processing the data, the system will delay waiting,
until the response delay time to up to a machine to send data.
Fd-04
Communication
Timeout Time
0.0 (disabled), 0.1s~60.0s
0.0s
○
When the function code is set to 0.0 s, communication timeout parameter is invalid.
When the function code set to valid values, if a communication and the interval time of the next
communication beyond the communication timeout, system error will be reported to the
communication failures (Err. 18).Usually, it is set into is invalid.If, in the continuous communication
system parameter set the time, you can monitor the communication status.
Fd-05
Data Transfer Format
Selection
0: Non standard MODBUS protocol
1: Standard MODBUS protocol
1
○
Fd - 05 = 1: choose the standard Modbus protocol.
Fd - 05 = 0: read command, from the machine returns number of bytes is more than the standard
Modbus protocol a byte, specific see "communications data structures" part of this agreement.
