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We are unable to communicate a Third Party Modbus TCP Gateway device with Vijeo citect SCADA as there in Citect no option for setting the Unit ID available which enables communication with slave device.

To set the Unit ID or Device Address you need to first complete the configuration of the Modbus TCP driver (using the Express Wizard) the similar way that you have configured in your attached pdf file then after that navigate to Citect Project Explorer >> Communication >> IO Devices . Here in this IO Device you need to set the Address of your device like 1 , 30 45 etc that you have already configured in your modbus device as shown in the attached snapshot.
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