Learn about the Community. Join our Core Community to Get Started

Schneider Electric Exchange Community

Discuss and solve problems in energy management and automation. Join conversations and share insights on products and solutions. Co-innovate and collaborate with a global network of peers.

Register Now
Knowledge Base
Showing results for 
Search instead for 
Did you mean: 

How Continuum tracks communication status of third party BACnet devices


What is the mechanism used by the Continuum system to determine the communication status of third party BACnet devices?

Product Line

Andover Continuum


  • CyberStation
  • bCX
  • BACnet


To maintain the communication status of third party BACnet devices


Continuum sends a read property message to read the vendor id from the device once a minute by default (or whatever the probe time is set to), as long as a timely response is received from the device Continuum keeps it online, if no response is received the device will be marked OFFLINE (after a retry)

Once a device is marked OFFLINE Continuum will perform a WHO-IS once a minute (ARP if CyberStation) until an I-AM is received which will cause the device to be tagged back online, once the device is back online Continuum will resume probing the device via the read property message once a minute.

Note that Continuum allows several probe options for BACnet devices, the behavior explained above is for when the probe type is set to 'Probe'

ProbeOnDemand - Probing does not occur unless a communications transaction with the target device fails. Once a transaction fails then probing occurs at the interval specified in Probe Time until the device comes back online. The advantage is that additional requests to the controller fail immediately. The disadvantage if that node failure is not detected  until a CyberStation application needs to communicate with a controller. 

ProbeOff - Probing does not occur. The advantage is that there is never probe traffic to the device. The disadvantage is that each request to the device fails only after the transaction times out.

Tags (1)
Labels (1)
No ratings