CS210201B1 - The electrical revival of the wounded unit to the logical system - Google Patents

Abstract

The invention relates to an electrical regeneration of a thyristor control logic system used in the most severe operating conditions of switching and flip-flop circuits, memories and computers. The invention solves the technical problem of shortening the regeneration of the thyristor control logic system so that it operates even during short supply voltage failures. The essence of the invention is the parallel connection of the regenerative resistor to the capacitor. The device is applicable, for example, to the Lormatic control logic system, designed for the most demanding applications in heavy duty conditions, for example, for controlling the movement of materials in engineering, metallurgy, transport or chemical industries.

Description

BACKGROUND OF THE INVENTION The present invention relates to an electrical circuit for an auxiliary unit of a control system of a logic control system used to adjust the initial conditions of sequential and flip-flop circuits, memories and counters.

The wiring known to date has the drawback that in the event of a short-time power failure, flip-flops, memories, and counters acquire a random state.

It is an object of the present invention to overcome the disadvantage that the regeneration resistor is connected in parallel to the capacitor.

The connection according to the invention achieves a higher effect compared to the effect achieved by the presently used circuit, in that without the use of additional semiconductor elements, the regeneration time of the control logic auxiliary unit circuit is shortened to such an extent that it operates even with short power supply failures.

In the accompanying drawing, the overall circuit diagram of an auxiliary unit of a Lormatic logic control system extended by a circuit according to the invention is shown.

The function of the electric circuit according to the invention is as follows: a positive pulse is applied to the control electrode of the thyristor T2 when the supply voltage is applied. which switches and through the diodes D2 to D23 gives the desired initial values by the automatic sequential circuit. At the same time, the capacitor 8 is charged and when charged to the voltage at which it opens the TI. this turns on and off the T2 thyristor. The unit does not participate in further activities. In the event of a short-time power failure, the capacitor C will not discharge, the TI thyristor remains open and the T2 thyristor is closed and thus the unit cannot participate in the initial condition setting. However, this does not happen after the R5 regeneration circuit is connected, because the capacitor C is discharged immediately after the power failure through the regeneration resistor R5. the thyristor T2 is closed and the thyristor T1 is opened, thereby setting the unit to the initial conditions as it would during long-term disconnection.

The electric circuit of the auxiliary unit in the control logic system according to the invention can be used, for example, in the Lormatic control logic system intended for the most demanding applications in difficult operating conditions, for example for controlling the movement of masses in engineering, metallurgy, transport or chemistry.

Claims (1)

OBJECT OF THE INVENTION An electrical circuit of an auxiliary unit 7 by a control logic controller for adjusting the initial conditions of the sequential circuits, characterized in that the regenerative resistor (R5) is connected in parallel to the capacitor (0).