Rockwell Automation RECOMM-CNET ControlNet Communications Module - Manual (Page 156)

Glossary-4 ControlNet Communications Module
status indicators - LEDs that are used to report the status of the
module, network, and drive. They are on the module and can be
viewed on the front cover of the drive when the drive is powered.
VS Utilities software - A software tool for monitoring and
configuring Reliance Electric products and modules. It can be run
on computers running Microsoft Windows 95, Windows 98,
Windows NT (version 4.0 or greater), Windows Me, Windows 2000,
or Windows XP operating systems. VS Utilities can be used to
configure the ControlNet module and SP600 drives.
zero data - When communications are disrupted (for example, a
cable is disconnected), the module and drive can respond with zero
data. Zero data results in the drive receiving zero as values for
command data. If the drive was running and using the reference
from the module, it will stay running but at zero reference.