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Revised 7/95 DFS-1 Manual
POWERTEC Ind. Corp.©
Programmable analog inputs and analog outputs
allow many possibilities for control through external
voltages, currents, and frequencies. They may also be
used to monitor drive operation. Digital inputs and
outputs (also programmable) give control and
monitoring flexibility as well as coordination
functions.
Provision is made for plug-in options which add
input and output options and accomplish special
functions. Optional software packages may be
ordered for specific application needs.
INTRODUCTION
A
s the computer revolution takes greater
control of industrial processes, there is
a growing need for more intimate control of
the process parameters. It is becoming ever more
necessary to control the important characteristics of
motors directly from computers and microprocessor-
based controllers. Such control cannot wait for
operator intervention when changes occur in milli-
seconds and tolerances are measured in thousandths.
All of the operational characteristics of a motor
are controllable by manipulating its speed, torque,
and power. POWERTEC digitally implemented,
speed, torque, and power control - the DFS-1.
The Brushless DC motor and its control are
digitally based, and are a natural choice for a
computer controlled environment. Now computers
and PLC's talk to the drive itself when the field-
installable DFS-1 control board replaces the Speed
and Current boards on the standard POWERTEC
Brushless DC drive.
One of the first things you will notice about the
DFS-1 is that there are no adjustment potentiometers
and no setup switches. All characteristics of the drive
are controlled by software parameters which may be
entered by the optional KDU-1 keypad or host
computer. The KDU-1 keypad can be mounted on the
DFS-1 board, in a remote location (usually the
enclosure door), or in a handheld unit. A default set
of parameters which represent the most common
operating conditions will facilitate immediate
operation and testing after installation.
Capable of operating on a single drive or in
networks, the DFS-1 is programmable by an optional
keypad with its two line, 16-character display. A
single computer port may be used to monitor and
control up to 32 units in an RS-485 communications
link.