Fc Protocol Overview - Danfoss VLT AutomationVTDrive FC322 Design Manual

Automation VT Drive FC322 Design Guide
Parameter Number Parameter name
8-30 Protocol
8-31 Address
8-32 Baud Rate
8-33 PC port parity/Stop bits
8-35 Min. response delay
8-36 Max. response delay
8-37 Max. inter-char delay
7.1.5 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 regulations, for example regarding protective earth connection, must be observed. The RS-485 communi-
cation cable must be kept away from motor and brake resistor cables to avoid coupling 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 recommended, 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.

7.2 FC Protocol Overview

MG.20.X1.22 - VLT
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7 RS-485 Installation and Set-up
Function
Select the application protocol to run on the RS-485 interface
Set the node address. Note: The address range depends on the protocol se-
lected in par. 8-30
Set the baud rate. Note: The default baud rate depends on the protocol se-
lected in par. 8-30
Set the parity and number of stop bits. Note: The default selection depends
on the protocol selected in par. 8-30
Specify a minimum delay time between receiving a request and transmitting
a response. This can be used for overcoming modem turnaround delays.
Specify a maximum delay time between transmitting a request and receiving
a response.
Specify a maximum delay time between two received bytes to ensure timeout
if transmission is interrupted.
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