In order to avoid potential equalizing currents in the screen, earth the cable screen via terminal 61, whichis connected to the frame via an RC-link.Bus terminationThe RS485 bus must be terminated by a resistor network at both ends. For this purpose, set switch S801on the control card for "ON".For more information, see the paragraph Switches S201, S202, and S801.NB!Communication protocol must be set to FC MC par. 8-30.How to Connect a PC to the FC 300To control the frequency converter from a PC, in-stall the MCT 10 Set-up Software.The PC is connected via a standard (host/device)USB cable, or via the RS485 interface as shown inthe section Bus Connection in the chapter How toProgramme.NB!The USB connection is galvanically iso-lated from the supply voltage (PELV)and other high-voltage terminals. TheUSB connection is connected to pro-tection earth on the frequency con-verter. Use only isolated laptop as PCconnection to the USB connector onthe FC 300 drive.USB connection.The FC 300 Software DialogData storage in PC via MCT 10 Set-Up Soft-ware:1. Connect a PC to the unit via USB com port2. Open MCT 10 Set-up Software3. Choose ìRead from driveî4. Choose ìSave asîAll parameters are now stored.Data transfer from PC to drive via MCT 10Set-Up Software:1. Connect a PC to the unit via USB com port2. Open MCT 10 Set-up software3. Choose ìOpenîñ stored files will be shown4. Open the appropriate file5. Choose ìWrite to driveîAll parameters are now transferred to the drive.A separate manual for MCT 10 Set-up Software isavailable.FC 300 Design GuideHow to Install94 MG.33.B7.02 - VLT is a registered Danfoss trademark
