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5 Commissioning and Application Examples
In order to avoid potential equalizing currents in the shield, ground the cable screen via terminal 61, which is connected to the frame via an RC link.
Bus termination
The RS-485 bus must be terminated by a resistor network at both ends. If the drive is the first or the last device in the RS-485 loop, set the switch S801
on the control card to ON.
For more information, see the paragraph
5.1.3 How to Connect a PC to the Adjustable Frequency Drive
To control or program the adjustable frequency drive from a PC, install the PC-based Configuration Tool MCT 10.
The PC is connected via a standard (host/device) USB cable, or via the RS-485 interface as shown in the VLT HVAC Drive
Install > Installation of misc. connections
5
NOTE!
The USB connection is galvanically isolated from the supply voltage (PELV) and other high-voltage terminals. The USB connection is
connected to protection ground on the adjustable frequency drive. Use only an isolated laptop as PC connection to the USB connector
on the adjustable frequency drive.
Figure 5.3: For control cable connections, see section on
5.1.4 PC Software Tools
PC-based Configuration Tool MCT 10
All adjustable frequency drives are equipped with a serial communication port. Danfoss provides a PC tool for communication between PC and adjustable
frequency drive, PC-based Configuration Tool MCT 10. Please check the section on
MCT 10 set-up software
MCT 10 has been designed as an easy to use interactive tool for setting parameters in our adjustable frequency drives. The software can be downloaded
from the Danfoss internet site
The MCT 10 set-up software will be useful for:
•
Planning a communication network off-line. MCT 10 contains a complete adjustable frequency drive database
•
Commissioning adjustable frequency drives on-line.
•
Saving settings for all adjustable frequency drives.
5-4
Switches S201, S202, and S801
.
Control Terminals
http://www.
.com/BusinessAreas/DrivesSolutions/Softwaredownload/DDPC+Software+Program.htm
Danfoss
MG.11.AB.22 - VLT
VLT
.
.
Available Literature
for detailed information on this tool.
®
is a registered Danfoss trademark
®
HVAC Drive Instruction Manual
Design Guide, chapter How to
.
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