What are the modbus addresses and how are they set?
The Modbus address (NODE Address) for the sensor is used to differentiate each sensor from each other. This is required so that the controller or the PLC can identify which sensor it is talking to and belongs to which process. Each sensor must have a unique address on the network. The address is set by means of the DIP switch (SW100) located in the sensor assembly itself. Only switch positions 1 to 6 are used giving valid address settings from 1 to 64 (Note that valid Modbus addresses are 1 – 32). The address switch uses binary coding to calculate the required address. For example, to set address number 5: Set switch 1 (binary 1) ON and switch 3 (binary 4) ON (4 + 1 = 5).
