Specifications

6.6.4 How to Connect a PC to the
Frequency Converter
To control the frequency converter from a PC, install the
MCT 10 Set-up 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.
130BT308.10
Illustration 6.60 USB Connection
6.6.5
PC 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.
6.6.6
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.
Ordering number:
Order the CD containing the MCT 31 PC tool using code
number 130B1031.
MCT 31 can also be downloaded from www.danfoss.com/
BusinessAreas/DrivesSolutions/Softwaredownload/.
6.7
Safety
6.7.1 High Voltage Test
Carry out a high voltage test by short-circuiting terminals
U, V, W, L
1
, L
2
and L
3
. Energise maximum 2.15 kV DC for
380-500 V frequency converters and 2.525 kV DC for
525-690 V frequency converters for one second between
this short-circuit and the chassis.
WARNING
When running high voltage tests of the entire instal-
lation, interrupt the mains and motor connection if the
leakage currents are too high.
Electrical Installation Design Guide
MG11BC02 Danfoss A/S © Rev. 06/2014 All rights reserved. 115
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