VFD Features V/Hz And VVW Operating Modes
WEG Electric introduced the CFW500 variable frequency drive, the most recent addition to WEG’s complete line of variable frequency drives. The WEG CFW500 drive has 230vac power ratings of 1/4HP-3HP single-phase input; 1/4HP-15HP three-phase input, as well as 1/4HP-25HP three-phase input at 460vac. Key features include V/Hz and vector control (VVW) operating modes, a built-in PLC, an integrated keypad with backlit display, optional external flash memory module and ‘plug and play’ option modules for communications and I/O to accommodate numerous machine configurations.
The CFW500 is designed to operate in ambient temperatures up to 50°C and can supply an overload of 150% for one minute, repeatable every six minutes without derating, eliminating the need for the machine designer to oversize the VFD. In addition, the CFW500 is designed to follow a pulse train signal as its speed reference and also transmit a pulse train through its digital output making it suitable for master/slave or matched speed applications.
The built-in keypad makes programing and viewing drive parameters simple, according to the company. The backlit display can monitor up to three different variables at the same time, along with indication of operation status, alarms and faults. A remote keypad CFW500-HMIR connected through a USB cable can be used in a local or remote location, and can be selected to serve as an external control device or locked to prevent unauthorized operation. The CFW500 drive is also compatible with WEG Superdrive G2 programing control software.
The built-in fully programmable Soft PLC can manage an OEM’s machine logic control needs. It includes a P-I controller for contr.ol loops, a sequencing control for progressive machine processes along with numerous logical functions. The programs saved in the CFW500 memory can also be password protected to secure the OEM's intellectual property. The drive parameters and PLC code can be saved for backup and transfer to another drive using the CFW500-MMF flash memory module. Powered by internal batteries, the flash memory module has a capacity for over 5000 operations and can be used without applying power to the VFD.