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CG_144895183-Newcomer
3-Newcomer
February 4, 2026
Solved

KepServerex V5 BACnet/IP Driver communication with ARCnet/IP sub network.

  • February 4, 2026
  • 1 reply
  • 105 views

Im having issues trying to communicate KepServerex V5 5.13 with BACnet server Automated Logic WebCTRL. The server have some HVAC, eletrical and Diesel equipments, but some of these devices are listed on ARCnet network. They dont have IP Address, or MAC Address that i can read, they have their Network Number, 1 MAC Address digit and their Device instance.

I managed to connect some devices to Arcnet, but these devices are listed under Routers that are configured as BBMD Devices, and the other devices listed in other ARCnet networks, i can't link or manage their communication in KepServer BACnet/IP driver.

 

Configuration for ARCnet devices that are communicating:

Kepserver device ID: <network number listed in WebCTRL device> . <device instance listed in WebCTRL>.

Kepserver discovery scope: Using Who-Is/I-Am - Remote Scope.

Kepserver COV: Do not use COV.

 

Error messages:

- Error reading tag '<tag_address>' on device '<device_path>' (Class: 1 (Object), Code: 31 (Unknown object)).
- Connection failed - did not get i-Am from remote device '<device_path>'.
- Device '<device_path>' with ID <network ID> . <device instance> is not responding.

 

Thank you in advance.

Best answer by MRohilla

Greetings,

The BACnet driver only supports BACnet/IP (Annex J). All other BACnet data link and transport types must go through a gateway.

The same applies to LonWorks and BACnet MS/TP, which must be converted to BACnet/IP via a gateway before they can communicate with Kepware. This is why the ARCNET devices connected through a BBMD are accessible.

Regards,

Mohit

1 reply

M
MRohilla12-AmethystAnswer
12-Amethyst
February 23, 2026

Greetings,

The BACnet driver only supports BACnet/IP (Annex J). All other BACnet data link and transport types must go through a gateway.

The same applies to LonWorks and BACnet MS/TP, which must be converted to BACnet/IP via a gateway before they can communicate with Kepware. This is why the ARCNET devices connected through a BBMD are accessible.

Regards,

Mohit

C
CG_144895183-NewcomerAuthor
3-Newcomer
February 25, 2026

Thanks for yor reply and informations!

 

But in my case of system, I can communicate with some devices/Routers in ARCnet network, but with others Routers in ARCnet, I can't.

Here's some infos about Routers thta communicate with ARCnet network.

  • The Routers have BBMD configuration, primary and secundary BBMD
  • They are listed on a node called "Discovered Networks" that has the ARCnet network

I can read the correct values from their BACnet Object and Instace Device ID.

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