Issue
Troubleshooting steps for the Infinet and MSTP bus.
Product Line
Andover Continuum, EcoStruxure Building Operation
Environment
- Continuum
- SmartStruxure
- RS-485
- Infinet
- BACnet MSTP
Cause
Methods are needed to troubleshoot the Infinet and MSTP bus
Resolution
This is not a comprehensive list of all methods for troubleshooting, but a starting point.
The Infinit-mstp troubleshooting document is available here.
NOTE
If BACnet MSTP devices do not support COV subscriptions, then care must be taken when reading values (eg EBO trends or alarms) as excessive traffic can be created that overwhelms the communication bus. For example, if 30 non-COV BACnet devices have EBO alarms (or EBO change of value trends) bound to 4 objects in each controller, this will create 240 packets (reads/replies) that will be attempted every "Minimum polling Interval". This is likely to fill the MSTP bus bandwidth
