Rockwell Automation 20-COMM-D DeviceNet Adapter Series B FRN 2.xxx User Manual
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G-8
Glossary
20-COMM-D DeviceNet Adapter User Manual
Publication 20COMM-UM002G-EN-P
S
Scanner
A scanner is a separate module (of a multi-module controller) or a built-in
component (of a single-module controller) that provides communication
with adapters connected to a network. See also Controller.
Status Indicators
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
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 Allen-Bradley
personnel identify the type of messages that an adapter is using.
U
UCMM (UnConnected Message Manager)
UCMM provides a method to create connections between DeviceNet
devices.
UDDT (User-Defined Data Type)
A structure data type that you define during the development of an
application (for example, to convert 32-bit REAL parameter data for written
and read values to correctly display them in human readable format).
Update
The process of updating firmware in a device. The adapter and its connected
PowerFlex 7-Class host drive and its peripherals can be updated using
various Allen-Bradley software tools. See
Z
Zero Data
When communication is 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, Reference, and Datalink
data. If the drive was running and using the Reference from the adapter, it
will stay running but at zero Reference.