How to connect Unity Pro to a Modbus Plus network through the MBX Gateway Driver

Issue

How can Unity Pro connect from a remote PC to a PLC on a Modbus Plus network through the MBX Gateway Driver?

Product Line

• Unity Pro
• MBX Driver Suite

Environment

• MBX Driver Suite v6.0
• MBX Gateway Client
• Modbus Plus network

Resolution

Before proceeding, the MBX Gateway Client and Server must already be configured for remote access to the Modbus Plus network.

In Unity Pro:

1. Open PLC > Set Address.

2. Enter the Modbus Plus address of the target PLC.

3. In Media, select the MB+ device corresponding to the MBX Gateway Client.

4. The device numbering used by Unity Pro is offset by 1 compared with the MBX Gateway configuration.

   Example: If the MBX Gateway Client is configured as device 1, select MBPLUS02 as the Media in Unity Pro.

   

5. Select OK.

6. From the PLC menu, select Connect to establish the connection to the PLC.