Frequency Converter Hardware Set-Up; Parameter Settings For Modbus Communication - Danfoss VLT HVAC Basic Drive FC 101 Design Manual

RS485 Installation and Set-...

7.1.3 Frequency Converter Hardware Set-up

Use the terminator dip switch on the main control board
of the frequency converter to terminate the RS485 bus.
Illustration 7.2 Terminator Switch Factory Setting
The factory setting for the dip switch is OFF.
MG18C702
Design Guide
7.1.4 Parameter Settings for Modbus
Communication
Parameter
Parameter 8-30 Prot
ocol
Parameter 8-31 Add
ress
Parameter 8-32 Bau
d Rate
Parameter 8-33 Pari
ty / Stop Bits
Parameter 8-35 Min
imum Response
Delay
Parameter 8-36 Ma
ximum Response
Delay
Parameter 8-37 Ma
ximum Inter-char
delay
Table 7.2 Modbus Communication Parameter Settings
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Function
Select the application protocol to run for
the RS485 interface.
Set the node address.
NOTICE
The address range depends on the
protocol selected in
parameter 8-30 Protocol.
Set the baud rate.
NOTICE
The default baud rate depends on the
protocol selected in
parameter 8-30 Protocol.
Set the parity and number of stop bits.
NOTICE
The default selection depends on the
protocol selected in
parameter 8-30 Protocol.
Specify a minimum delay time between
receiving a request and transmitting a
response. This function is for overcoming
modem turnaround delays.
Specify a maximum delay time between
transmitting a request and receiving a
response.
If transmission is interrupted, specify a
maximum delay time between 2 received
bytes to ensure timeout.
NOTICE
The default selection depends on the
protocol selected in
parameter 8-30 Protocol.
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