DSE 7320 supports Modbus communication protocol, so it can be connected to Rapid SCADA.
You should do the following:
1. Read this article and watch this video.
2. Create your own simple project to read data from Modbus simulator.
3. Find the Modbus register map for DSE 7320 in the manufacturers documentation.
4. Create your Modbus template DSE 7320 for that specifies the registers to read.