SU746420A1 - Programme-control device - Google Patents

Description

one

This invention relates to the automation of industrial processes, which is possible; to be used, in particular, in the development of various high-reliability software control devices, operating in remote control mode or by signaling sensors of parameters and state of executive bodies, for example, refrigerating machines.

A device for programmed control is known, comprising pargillet and actuator state sensors, a central program control unit and program control units for aggregates 1.

In this device, the units software control units contain input and output, a relay, and a switch for control.

TaiKHe devices are not reliable enough, because part of the input or output relays are under current for a long time, which leads to an intensive development of their resource.

The closest in technical essence to the proposed solution is a device for programmed control, containing a switch, the input of which is connected to the first BXo; D OM devices, and outputs - to the forward inputs of remote switches, the second inputs of which are connected to the second input of the device G2.

Disadvantage of this device

 is reliability.

The purpose of the invention is to increase the reliability of the device.

The goal is to ensure that the device contains a block

15 time relays, pulse counter and control relays, the first winding terminal of which.) Connect via the first open contact of the time relay unit to the output of the control unit,

20 second output through the first esmykuyo; and 1sontakt time relay unit - to the second input of the device, which through the first closing contact of the control relay is connected to the first inputs of the pulse counter and the time relay unit, the second inputs of which are connected to the first input through the second shorting contact devices that are connected via a serially connected second and third disconnecting contacts of the time relay unit are connected to the input of the control unit, and the input of the switchboard through the second closing contact of the time relay unit is connected Inonii the first input device.

The functional diagram of the device is shown in the drawing.

The device contains inputs 1 and 2, disconnecting contacts 3 of remote switches, switch 4, remote switches 5, time relay 7, pulse counter 8, disconnecting contacts of time relay unit 9-11, closing contacts of time relay unit 12 and 13, closing contacts 14- 16 control relays and a control unit 17 consisting of valve elements 18 and 19, closing contacts 20 remote switches, contacts of sensors of monitored parameters 21 and 22, and relays 23 with contacts 24,

The device works as follows. When the contact of the sensor of the monitored parameter 21 is closed and, consequently, when contact 22 of the same sensor is opened, the positive potential from the input 1 of the device through the closed contact 3 of the switch 5, valve element 19, the disconnecting contact 9, block 7 is fed to the control winding b. Relay 6 is triggered; at the same time, through its closing contact 14, it becomes self-picking up from the positive power bus, connects its positive contact 15 to the first power supply bus to the first terminals of the switching time relay block 7 and the pulse counter 8, and the third locking pin 16 of the CTisg device to the second input bus. K: common bus neutral relay iJ3. As a result, the unit and the pulse counter 8 are energized.

In addition, the element (diode) 18 is displaced in the positive direction and triggers the corresponding neutral relay 23, which through its closing contact 24 becomes self-picking up from the positive bus of the first input of the device, and its contacts entering the switch 4 switch the circuits to trigger the remote switches 5.

After some time, the second disconnecting contact 10 of block 7 opens, disconnect ;: contacts of input signals from the device positive bus, and contact 13 of block 7 closes, connecting the positive bus of the device to switch 4. As a result of the previously prepared circuits of the switch, the corresponding remote switches 5 and their contacts in turn turn changing the circuits of switch 4, opening contacts 3, closing contacts 20, and other contacts (not shown in the drawing) giving commands to enable controlled aggregates.

After the second time delay, the closing contact 12 of the g 7 block closes, which bypasses the closing contact 16 of the control relay 6.

After the third time delay, the opening contact 9 of the switching unit 7 de-energizes the relay.

control 6 and break contact

11 of block 7, in addition to the contact. 10 disconnecting the contacts of the input signals from the positive power bus of the device. As a result, the control relay 6 turns off and opens its contacts 14, 15, and 16. This leads to the disconnection of block 7 and pulse counter 8, in which the unit is written. Then, block 7, after a fourth time delay, opens its contact 13, thus disconnecting the switch 4 and the remote switches 5 from the device’s power supply bus at the required time interval, and closes its disconnecting switch

5 pin 10 in the positive power supply bus circuit of the device, which remains disconnected from the contacts of the input signals through the open contact 11 of block 7.

Q After a fifth time, the closing contact 12 of the unit 7 is opened, which leads to the disconnection of the input neutral relays 23, the contacts of which return to the initial position.

After the sixth time delay, the opening contact 11 of block 7 closes, connecting the device's positive power bus to contacts 21, 22 of the input signals.

With the closure of the contact 22 of the input sensor and, therefore, with the opening of the contact 21 of this sensor, the positive potential on

5, the input of the valve element 19 enters through the closed contact 22 of the sensor for controlling the parameters and the closed contact 20 of the remote peer. key 5. In this case, the operation of the software control device is similar to that described above. The exception is that in this case the corresponding input relay 23 is not activated. and its contacts, included in the com mutator, remain in the initial position.

Thus, the proposed device for software control of units has the following technical advantages.

0 Disabling the common bus of the sensor contacts of the parameters control from the positive bus of the device power supply by means of the opening contacts of the time relay unit eliminates the effect of the switching frequency of the sensor contacts

Claims (1)

Claim Device for software. a circuit comprising a switch, the input of which is connected to the first input of the device, the outputs - to the first inputs of the remote switches, the second inputs of which are connected to the second input of the device, characterized in that, in order to increase the reliability of the device, it contains a time relay unit, a pulse counter and control relay, the first output of the winding of which is connected through the first NC contact of the time relay unit to the output of the control unit, the second output through the first NC contact of the time relay unit - to the second input of the device a, which through the first make contact of the control relay is connected to the first inputs of the pulse counter and the time relay unit, the second inputs of which through the second make contact of the control relay are connected to the first input of the device, which is connected through the second and third disconnect contacts of the time relay unit to the input control unit, and the input of the switch through the second make contact of the time relay unit is connected to the first input of the device.