Terminals 81 and 82 are brake resistor terminals.
NOTICE
If a short circuit in the brake IGBT occurs, prevent power
dissipation in the brake resistor by using a mains switch
or contactor to disconnect the mains for the frequency
converter. Only the frequency converter should control
the contactor.
CAUTION
Note that voltages up to 1099 V DC, depending on the
supply voltage, may occur on the terminals.
9.6.5 PC Software
The PC is connected via a standard (host/device) USB
cable, or via the RS-485 interface.
USB is a serial bus utilising 4 shielded wires with ground
pin 4 connected to the shield in the PC USB port. By
connecting the PC to a frequency converter through the
USB cable, there is a potential risk of damaging the PC USB
host controller. All standard PCs are manufactured without
galvanic isolation in the USB port.
Any ground potential difference caused by not following
the recommendations described in
AC Mains Connection
in
the
Operating Instructions
, can damage the USB host
controller through the shield of the USB cable.
It is recommended to use a USB isolator with galvanic
isolation to protect the PC USB host controller from
ground potential differences, when connecting the PC to a
frequency converter through a USB cable.
It is recommended not to use a PC power cable with a
ground plug when the PC is connected to the frequency
converter through a USB cable. It reduces the ground
potential difference, but does not eliminate all potential
differences due to the ground and shield connected in the
PC USB port.
130B
T308.10
Illustration 9.48 USB Connection
9.6.5.1 MCT 10
To control the frequency converter from a PC, install the
MCT 10 Set-up Software.
Data storage in PC via MCT 10 Set-up Software
1.
Connect a PC to the unit via USB com port.
2.
Open MCT 10 Set-up Software.
3.
Select the USB port in the
network
section.
4.
Select
copy
.
5.
Select the
project
section.
6.
Select
paste
.
7.
Select
save as
.
All parameters are now stored.
Data transfer from PC to frequency converter via MCT
10 Set-up Software
1.
Connect a PC to the unit via USB com port.
2.
Open MCT 10 Set-up Software.
3.
Select
Open
– stored files are shown.
4.
Open the appropriate file.
5.
Select
Write to drive
.
All parameters are now transferred to the frequency
converter.
A separate manual for MCT 10 Set-up Software is available.
Download it from
www.danfoss.com/BusinessAreas/DrivesSo-
9.6.5.2 MCT 31
The MCT 31 harmonic calculation PC tool enables easy
estimation of the harmonic distortion in a given
application. Both the harmonic distortion of Danfoss
frequency converters as well as non-Danfoss frequency
converters with additional harmonic reduction devices,
such as Danfoss AHF filters and 12-18-pulse rectifiers, can
be calculated.
MCT 31 can also be downloaded from
BusinessAreas/DrivesSolutions/Softwaredownload/
9.6.5.3 Harmonic Calculation Software
(HCS)
HCS is an advanced version of the harmonic calculation
tool. The calculated results are compared to relevant
norms and can be printed afterwards.
See
www.danfoss-hcs.com/Default.asp?LEVEL=START
Electrical Installation
VLT
®
AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
MG33BF02 - Rev. 2013-12-20
139
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