Yaskawa VCD 723 - Manual (Page 10)

1 Introduction
4 Drive Description
9/15/93
The VCD 723 drive is composed of several major components. The base
component is the MagneTek VCD 703 drive, with special software. To this is
added the MicroTrac circuit card, which provides graphical PAC programming
environment, LAN communications and extra local I/O. The other components
are the Local and Portable Control/Display Units, which allow user friendly
interface for drive setup and provides extensive diagnostic capabilities. In
addition, optional circuit cards can be added for expanded local I/O capabilities
and added functionality.
The VCD 723 can be set up to operate in one of two major modes based on the
level of regulation enabled. The first mode allows the drive to run as if it were a
VCD 703 drive, but the input for the constants come from the PAC environment
instead of from the Digital Operator. In addition to utilizing the speed control
logic of the VCD 703 drive to control the motor, this mode adds the extra I/O
capabilities that are present on the MicroTrac circuit card. This also allows for
all of the advantages and flexibility of utilizing the PAC programming language.
In this mode, the inputs and outputs on the VCD 723 behave in the same way
that they would have had this been a VCD 703 drive, however, the An, Bn, Cn,
Dn, On, Sn, and Un constants are entered via the PAC environment.
The second major operating mode of the VCD 723 has the VCD 703 drive
operate as a slave to the MicroTrac circuit card. In this mode, the PAC
programmer has complete freedom in how the motor should be controlled,
including which inputs/outputs should perform a specific function.
The VCD 723 is mounted in a NEMA 1 wall mount enclosure, with other
power/control components required for VCD/VCM interconnection.
When properly installed, operated and maintained, the VCD 723 can provide
years of troublefree service. It is important that the person who operates,
inspects, or maintains this equipment thoroughly read and understand this
manual before proceeding.
Useability
Versatility
Characteristics