Rockwell Automation 22-COMM-L LonWorks Adapter User Manual
Page 70
G-6
Glossary
SNVT (Standard Network Variable Type)
SNVTs are a set of predefined types of network variables with associated
units, such as degrees, centigrade, etc. SNVTs promote interoperability
of products from different manufacturers by standardizing the names
given to Network Variable Inputs and Network Variable Outputs.
Status Indicators
Status indicators are LEDs that are used to report the status of the
adapter, network, and drive. They are on the adapter and can be viewed
on the front cover of the drive when the drive is powered.
T
Transceiver
A device that is both a transmitter and a receiver for a communications
channel.
Type 0/Type 1/Type 2 Control
When transmitting I/O, the adapter can use different types of messages
for control. The Type 0, Type 1, and Type 2 events help Rockwell
Automation personnel identify the type of messages that is used.
Z
Zero Data
When communications are disrupted (for example, a cable is
disconnected), the adapter and drive can respond with zero data. Zero
data results in the drive receiving zero as values for Logic Command and
Reference data. If the drive was running and using the Reference from
the adapter, it will stay running but at zero Reference.