Hakuteksti "can".

their internal transfer and processing of information, to show ways in which the respective system can be influenced in order to achieve certain objectives.

Of the most important forms of energy that can be used for drives (mechanical, hydraulic and pneumatic) only mechanical energy does not require conversion (Figure E 29) . For all forms of energy the detour

pressure on the barrier element. For certain applications, check valves are built so that the barrier can be lifted by control pressure ( releasable check valves).

where the pressure difference is able to emerge. This difference between total and static pressure can be used to infer the flow velocity. The pitot-static tube is only slightly dependent on direction.

ion of a controller are based. It acts like a kind of automated analysis of system parameters. It can take place within a time or frequency range.

oscillating movements where the stroke remains within the height of the seal. No new lubricating film can develop during this kind of movement, which means the whole process is affected by dry friction.

adapt acceleration and delay processes to the respective requirements. The incline and decline ramps can be selected separately.

(VDI/VDE 2600). The resolution of digital signals is limited by the selected step size that, however, can be very small. However, more time is then also required for the processing. Digital measured signals

program changes by changing or replacing the stored program, short commissioning times as changes can be made quickly, automatic and error-free program documentation, identifying and localising errors [...] and logic control system , therefore as a replacement for relay and contactor controls. However, it can normally be enhanced for control technology tasks.

Errors that cause a hazard for man and/or machine. The definition of a dangerous error in a control can only be derived from the interaction of the control with the device to be controlled. Here both active [...] unintended placing in operation) and also passive errors (e.g. prevention of intended standstill) can be dangerous errors (DIN 19 237). Sleeping errors : Errors that only occur if another error has occurred