I/O means input/output. A digital input (DI) only has a high value or zero. Its either on or off as an input to your PLC. Eg, start signal through the PLC. (Either 24Vdc or 0Vdc - On or off).
Digital outptut however (DO) is an output signal from the PLC or controller. It gives out 24Vdc or...
Im busy with an existing installation and I have the abovementioned PLC installed. It's my first time on such a PLC. I need to install an ethernet module to configure it the an Intouch SCADA over the network. Are there any hardware configurations that I need to do like in S7 (Siemens)?
