Danfoss VLT AutomationDrive FC 300 Design Manual page 129

FC 300 Design Guide
FC 300 Parameter Settings for Modbus Communication
The following parameters apply to the RS-485 interface (FC-port):
Parameter Number
8-30
8-31
8-32
8-33
8-35
8-36
8-37
EMC Precautions
The following EMC precautions are recommended in order to achieve interference-free operation of the
RS-485 network.
NB!
Relevant national and local regula-
tions, for example regarding protec-
tive earth connection, must be ob-
served. The RS-485 communication
cable must be kept away from motor
and brake resistor cables to avoid cou-
pling of high frequency noise from one
cable to another. Normally a distance
of 200 mm (8 inches) is sufficient, but
keeping the greatest possible distance
between the cables is generally rec-
ommended, especially where cables
run in parallel over long distances.
When crossing is unavoidable, the
RS-485 cable must cross motor and
brake resistor cables at an angle of 90
degrees.
RS-485 Installation and Set-up
Parameter name Function
Protocol Select the application protocol to run on the RS-485
interface
Address Set the node address. Note: The address range de-
pends on the protocol selected in par. 8-30
Baud Rate Set the baud rate. Note: The default baud rate de-
pends on the protocol selected in par. 8-30
PC port parity/Stop Set the parity and number of stop bits. Note: The
bits default selection depends on the protocol selected in
par. 8-30
Min. response delay Specify a minimum delay time between receiving a
request and transmitting a response. This can be
used for overcoming modem turnaround delays.
Max. response delay Specify a maximum delay time between transmitting
a request and receiving a response.
Max. inter-char delay Specify a maximum delay time between two received
bytes to ensure timeout if transmission is interrup-
ted.
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MG.33.B8.02 - VLT is a registered Danfoss trademark
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