INTRODUCTION
Have you ever found yourself wishing you had a easy way to monitor status of one or more
VFDs on a network, maybe even store the data to a database on a personal computer? How
about, starting, stopping or resetting a tripped out VFD using a personal computer? How
does this sound, troubleshooting a VFD’s parameter settings even if it’s
hundreds of miles away. Look no further because VFDComm is a communication tool designed
to answer those wishes and more!
VFDCOMM OVERVIEW
VFDComm allows the application developer to use the Microsoft Visual Basic programming
environment for the creation of Windows applications. These applications communicate with
the Mitsubishi Variable Frequency Drive using Mitsubishi’s FR-APA or FR-ZRS computer
interface modules with or without a modem.
The computer interface module allows VFDComm to transfer information between one or more
networked Mitsubishi Variable Frequency Drive(s) and one or more IBM compatible PCs using
RS232, multidrop RS422 or RS485 communications.
VFDComm transfers major information, status, and parameters up to 13 times a second per
communications port (up to 99) and imposes no limit on the number of data points passed
between the Variable Frequency Drive(s) and the PC’s application.
Once VFDComm is installed, all that is required to access the Variable Frequency Drive's
internal devices is a simple statement similar to assigning or retrieving the value of a
variable in memory. This method gives the application developer an intuitive way to create
effective operator interface and monitoring applications. An example of a simple operator
interface is contained within this document.
VFDComm is a VBX file which is a special type of Windows DLL(Dynamic Link Library) which
integrates and becomes a part of the Visual Basic programming environment. This type of
DLL is commonly referred to as a custom control. This is the tightest, and most intuitive
integration possible with any application development environment for Microsoft Windows.
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