Rockwell Automation 20-COMM-K CANopen Adapter User Manual
Page 112
G-4
Glossary
20-COMM-K CANopen Adapter User Manual
Publication 20COMM-UM012B-EN-P
Fault Configuration
When communications are 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, Reference, and/or
Datalink(s).
Feedback
See Reference/Feedback.
Flash Update
The process of updating firmware in a device. The adapter can be flash
updated using various Allen-Bradley software tools. Refer to
Updating the Adapter on page 3-10
for more information.
G
Guard Time
See Node Guarding.
H
HIM (Human Interface Module)
A device that can be used to configure and control a drive. PowerFlex
7-Class HIMs (20-HIM-xxx) can be used to configure PowerFlex 7-Class
drives and their 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
I/O Data
I/O data, sometimes called “ implicit messages” or “input/output,” is
time-critical data such as a Logic Command and Reference. The terms
“input” and “output” are defined from the controller’s point of view. Output
is produced by the controller and consumed by the adapter. Input is
produced by the adapter and consumed by the controller.
L
Life Guarding
Life Guarding is used for error control to check that the NMT master is
working properly. The NMT master guards all of its NMT slaves cyclically
(cycle time = Guard Time) by using an RTR frame (see Node Guarding). If
a slave does not receive an RTR frame from the NMT master within a
specified time (= Guard Time x Life Time Factor), the slave knows that the
NMT master must have failed. This mechanism is called Life Guarding.