Rockwell Automation 22-COMM-C ControlNet Adapter User Manual

Page 153

Glossary

G-3

Explicit Messaging

Explicit Messages are used to transfer data that does not require
continuous updates. They are typically used to configure, monitor, and
diagnose a device over the network.

Fault Action

A fault action determines how the adapter and connected drive act when
a communications fault (for example, a cable is disconnected) occurs or
when the scanner is switched out of run mode. The former uses a
communications fault action, and the latter uses an idle fault action.

Fault Configuration

When communication is disrupted (for example, a cable is
disconnected), the adapter and PowerFlex drive can respond with a
user-defined fault configuration. The user sets the data that is sent to the
drive using specific fault configuration parameters in the adapter. When
a fault action parameter is set to use the fault configuration data and a
fault occurs, the data from these parameters is sent as the Logic
Command and Reference.

Flash Update

The process of updating firmware in the adapter. The adapter can be
flash updated using the Allen-Bradley software tool ControlFLASH, the
built-in flash capability of DriveExplorer (version 4.01 or higher), or
when the adapter is installed in a DSI External Comms Kit, the
X-Modem protocol and a 22-SCM-232 serial converter (version 3.xx or
higher firmware).

HIM (Human Interface Module)

A device that can be used to configure and control a PowerFlex 4-Class
drive. PowerFlex 4-Class HIMs (22-HIM-xxx) can be used to configure
connected peripherals.

Hold Last

When communication is disrupted (for example, a cable is
disconnected), the adapter and PowerFlex drive can respond by holding
last. Hold last results in the drive receiving the last data received via the
network connection before the disruption. If the drive was running and
using the Reference from the adapter, it will continue to run at the same
Reference.

I/O Data

I/O data, sometimes called “implicit messages” or “input/output,”
transmit time-critical data such as a Logic Command and Reference. The