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Configuration of the UniPi module
A UniPi Neuron/Axon consists of small computer running a GNU/Linux and HW IO modules (see inner diagram for Neuron and Axon). These modules offer different functionality based on the IOs they present. For example digital inputs can act as Direct Switches, analog inputs can measure different quantities, digital outputs can output PWM and so on. Any output can have a default value, which applies right after powering up the PLC, way before the finishing the boot up sequence of the operating system.
All of these configurations are OS-independent and are permanently stored into the modules. If you receive an used PLC, the best approach is to save a blank new configuration to overwrite some unwanted settings.
In Mervis,
