SU1697073A1 - Self-check information input device - Google Patents

Abstract

The invention relates to computing technology, in particular, to technical means of software control of process equipment. The aim of the invention is to simplify the device. The device contains 1 galvanic isolation units, information inputs 2 devices, input 3 RESOLUTION OF THE SAMPLE, input 4 CONTROL / OPERATION, element OR 5, generator 6 pulses, counter 7, data buffer 8, decoder 9, information outputs 10 devices, comparator unit 11, driver 12, trigger 13, display element 14. If the output information of the device does not coincide with the reference, a malfunction indication is formed and the pulse generator is blocked, which ensures that the test is stopped at the address of the channel through which the malfunction was detected.

Description

The invention relates to computing technology, in particular, to technical means of software control of process equipment.

The purpose of the invention is to simplify the device.

The drawing shows a block diagram of the device.

The device contains 1 galvanic isolation blocks, information inputs 2 devices, input3 RESOLUTION OF THE SAMPLE, input 4 CONTROL / OPERATION, element OR 5, pulse generator b, counter 7, data buffer 8, decoder 9, information outputs 10 of the device, unit 11 comparison, driver 12, trigger 13, display element 14,

The device works as follows. In OPERATION mode, a low level at input 4 CONTROL / OPERATION of the device blocks the generator of 6 pulses, allows the signal from input 3 the inputs of the galvanic isolation of the outputs of the driver 12. The inverse output of the flip-flop 13 is set to one, which determines the state of the display element 14. In this mode, signals applied to galvanic isolation blocks 1, if there is an active signal at input 3, the RESOLUTION OF THE SELECTION of the device is transmitted through buo y

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Fer 8 data to the outputs 10 of the device. In the absence of an active signal at input 3, the SELECTION RESOLUTION of the device information is not transmitted to the information outputs 10 of the device 10.

The OPERATION mode corresponds to the normal operation of the input device in the programmable controller.

In the CONTROL mode, a logical unit at input 4 and inverse output of flip-flop 13 enables the generator 6 pulses, setting counter 7 to work in continuous counting mode, translates data buffer 8 and shaper 12 into data transfer mode from its inputs to outputs, and enables receiving information 13 from the information input of the signal from the second inverted output of the generator b pulses.

Thereby, the control inputs of the galvanic isolation unit 1 are stimulated by the test combinations formed by the decoder 9. The output reactions of the device, taken from the outputs 10, are compared with the reference information corresponding to the state of the decoder in the current clock cycle. The result of the comparison, generated by the comparison unit 11, is recorded in the trigger 13 by the sync signal from the second (inverse) output of the pulse generator b.

When the device is healthy, the monitoring procedure is repeated cyclically. In this case, the logic zero level is maintained at the output of the comparison unit.

If the output information of the device does not coincide with the reference information, a logical unit is formed at the output of the comparator unit 11, which converts the trigger 13 into the unit state. An indication of the malfunction and

6 pulse generator is blocked, i.e. The test stops at the address of the channel where the malfunction was detected.

Claims (1)

The invention of the device for entering information with self-control, containing blocks galvanic isolation and data buffer, outputs which are informational outputs of the device, and the inputs are connected to the outputs of the corresponding galvanic isolation blocks, the inputs of which are the informational inputs of the device, which, for the sake of simplicity, are inserted into it the OR element , pulse generator, counter, decoder, comparison unit, driver, trigger, display element, the first input of the element OR is the input RESOLUTION OF THE SELECTION of the device, the second input of the element OR is connected to the start input of the generator pulse, with the control input The mapper, the reset input of the trigger and is the CONTROL / OPERATION input of the device, and the output is connected to the control input of the data buffer, the outputs of which are connected to the first group of inputs of the comparison unit, the second group of inputs of which are connected to the decoder outputs and the inputs of the compiler, the outputs of which are connected to the control inputs of the respective galvanic isolation blocks of corpses, the stop input of the pulse generator is connected with the input of the indication element and the inverse output of the trigger, the information input of which is connected to the output of the comparison unit, and the clock input with the inverse output of the pulse generator, direct output which is connected to the clock input counter, the outputs of which are connected to the inputs of the decoder.