Specifications

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GLOSSARY
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Firmware: Software that is stored in EPROM (Erasable
Programmable Read Only Memory). Firmware can be uploaded
from the configuration program to a VRC unit and also updates
the unit's programming.
Floating Point: A decimal notation that describes a number. For
example, 3.14 is referred to as a floating point number since the
decimal value may appear at any position.
General Setup: General Setup is a component of the VRC2500
software. It is the primary tool in setting up the VRC2500
hardware and software. This application is used to setup all VRC
unit functions such as status inputs, meter limits, command
outputs, time of day events, and macros. Configuration is also
used to setup site security, site time, and dial-out information.
Latching: A control signal that remains in a fixed state until
released. This is opposed to a momentary control which is a
pulsed signal.
Leased-Line: See Dedicated Telephone Line.
LED Light Emitting Diode. A semiconductor diode used in an
electronic display that emits a light when subjected to an applied
voltage.
Logging: A scheduled routine of having the PC connect to a
VRC2500 site and gather current information on selected units
and their respective input or output conditions. The Data Browser
and Scheduler programs handle this function.
Macro: A string of software commands to a system that allows it
to perform complex functions. Macros allow VRC2500 units to
evaluate a situation and take corrective action based on the
programmer's desired responses.
Monitoring: Handled by the viewer application. Live data viewing
of input and output channels is available, as well as the ability to
issue commands or run macros.
Network Address Number: Refers to the unique number that
each VRC2500 site is assigned during configuration. This number
allows the software to differentiate between more than one site
when simultaneously connected.
Null-modem Cable: An RS-232 cable that reverses pins two and
three. Use only the provided custom null-modem cable when
connecting your PC to a VRC2500 unit.