Rockwell Automation 20-COMM-Q ControlNet Adapter - Manual (Page 261)

Glossary G-7
20-COMM-C/Q ControlNet Adapter User Manual
Publication 20COMM-UM003F-EN-P
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
Updating the Adapter
Firmware on page 3-8 for more information.
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.