The inputs, outputs and parameters of an application can be influenced in various ways. These are identified by the following symbols in this document:
| Term | Description |
|---|---|
| DTE | Data Terminal Equipment |
| Modbus master | A MODBUS device, which is able to access data in one or more connected MODBUS Slave |
| Modbus slave | A MODBUS device, which is able to respond to requests from a single MODBUS master |
| Pxx | Parameters of the device where xx = 00, 01, 02, etc. |
| RDF Modbus | The name of RDF302, RDF302/VB and RDF302.B providing RS485 Modbus communicative |
| RTU | Remote Terminal Unit = Standard MODBUS transmission mode |
The communication objects of the RDF302, RDF302/VB and RDF302.B thermostats are described accordingly.
A list of the parameters is shown in section 3.13.