The compact controller is part of a series of controllers, which can be used universally and in different DIN formats for controlling temperature, pressure or, for example, flow rate. This is suitable for front installation. The controller is characterized by a simple, clearly structured operation supported with texts. Process values and parameters are represented by two 18-segment LCD displays. In addition, the design has individual display elements for the switch positions of the outputs as well as for manual mode, ramp function and timer The controller also has a self-optimization function and a program controller. The function of limit value monitoring, digital control signals and a service counter round off the performance of the controller. The controller can be easily configured with a PC using the setup program (including program editor and ST-Editor). During configuration via the USB interface no separate power supply is required (USB-powered). The device is operated via a fou