Rockwell Automation 20-COMM-B BACnet MS/TP Adapter - Manual (Page 67)

Glossary-5
S
Status Indicators
Status indicators are 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 Control
When transmitting I/O, the adapter can use different types of messages
for control. The Type 0 events help Allen-Bradley personnel identify the
type of messages that an adapter is using.
Z
Zero Data
When communications are 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 and
Reference data. If the drive was running and using the Reference from
the adapter, it will stay running but at zero Reference.