Rockwell Automation 20-750-PNET Profinet Single Port Option Module - Manual (Page 90)

90 Rockwell Automation Publication 750COM-UM006A-EN-P - January 2013
Glossary
Update The process of updating firmware in a device. The option module can be flash
updated using various Allen-Bradley software tools. See
Updating the Option
Module Firmware on page 38 .
Zero Data When communication is disrupted (for example, a cable is disconnected), the
option module 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 option module, it will
stay running but at zero Reference.