Modbus Network Offline Alarm in EBO Version 6 and Later

[Jonas_Brissman]

Issue

In EcoStruxure Building Operation (EBO) version 6 and later, users may encounter a persistent Modbus Network Offline alarm, even when all Modbus devices under the network are online.

Product Line

EcoStruxure Building Operation

Environment

• Building Operation Enterprise Server
• Building Operation Automation Server Premium(AS-P)
• Building Operation Automation Server Bundled (AS-B)

Cause

The Modbus communication architecture was restructured between EBO versions 5 and 6.

• In EBO version 5, the system could generate alarms for the Modbus network itself being offline.
• In EBO version 6 and later, network-level offline alarms are deprecated. Alarms are now only generated at the device level, not for the network.

If a site is upgraded from version 5 to 6, any existing Modbus network offline alarms will persist, but EBO will no longer monitor or clear them, as it no longer tracks network-level status.

Resolution

 To remove the obsolete Modbus network offline alarm in EBO version 6, you have two options:

1. Hide the Alarm

   • Since the alarm is no longer relevant in version 6, you can simply suppress or hide it from the alarm list.

2. Delete and Recreate the Modbus Network

   • This method ensures complete removal of the alarm. Important: Ensure you have a verified backup before performing these steps:
     • Export the Modbus network configuration.
     • Delete the network using the “Keep Bindings” option.
     • Re-import the network configuration.