Circuit arrangement for diagnosing faults in static-converter devices

The invention relates to the field of electrical engineering/electronics and has the aim of reducing the outage times of static-converter devices and of improving the utilisation of machining and processing machines. The object of the invention consists in creating a circuit arrangement in which, when faults occur in the static-converter device itself or in higher-level controllers, together with the disconnection of the actuators, the cause of the fault is displayed and/or the fault messages are prepared for computer evaluation. According to the invention, the proposed arrangement contains single-fault evaluating units (EFE 1; EFE 2) and a cumulative fault evaluating unit (SFE) for inputting fault signals, these evaluating units being used for generating fault messages for processing in a fault diagnostics unit (FDE). To control the operation of these units, a start-up unit (AE) with a start-up call-up unit (AAE), a fault lock (FS) and a reset unit (RSE) are also arranged. The field of application for the invention is static-converter devices for actuators in a controller for machining and processing machines. Figure 1 best shows the invention.