SU1525896A1 - Programmable timer - Google Patents

Abstract

The device can be used in multichannel control devices that perform the work on a predetermined time program. The purpose of the invention is to increase reliability by simplifying the device while simultaneously expanding the functionality — achieved by performing a counter in the form of Johnson's counter 2, excluding one of the pulse generators from the device, and making it easier for the channel of the multichannel reversal unit 3. The device also includes a generator of 1 pulses, output buses 4.1-4.N

5.1-5.N, tire 6 zeroes. Each channel of the multichannel reversal unit 3 contains the elements AND-HEN 7 - 9. The introduced differences provided a simpler hardware implementation of the device, as well as expanded its functionality, since the cyclograms at the outputs of each channel of the multichannel reversal unit 3 can be set with different time parameters, and also with the necessary phase shifts. 1 il.

Description

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The invention relates to automation and impulse technology and can be used in multichannel control devices that carried out work on a program predetermined in time.

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

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IENT 9 is connected to the output 5 of the channel „

The operation of the software time relay for one channel of the multichannel block 3 reverse is carried out as follows.

With power on, after removing the zero signal from bus 6

while simultaneously expanding the function, a wave of ones propagates from the first trigger of Johnson's counter 2 to the last one, and then a wave of zeros.

After a certain time, depending on the frequency of the pulse generator 1, a single signal is generated at the n-output of Johnson's counter 2 (at the same time a zero signal is stored at the n + K - output)

of opportunities.

The goal is achieved by performing a counter in the form of a Johnson counter, excluding one of the pulse generators from the device, making the channel of a multichannel reversing unit simpler and introducing new connections, which allows on the one hand to simplify the device, and

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the other one is to expand its functional.,. "It is supplied to one of the inputs of the elements, since the cyclograms at the outputs of each channel can be set with different time parameters, as well as with the necessary phase shifts.

FIG. 1 shows a functional diagram of a software time relay; in fig. 2 - cyclograms of the program time relay for two actuators.

A software time relay contains a generator of 1 pulses, a counter of 2 Johnson, m} 1-channel block 3 reverse, outputs 4.1-5.1-4.n-5.n and bus 6 zeroing. The channel of the multichannel block 3 reverse contains the elements AND-NOT 7-9.

Pulse generator 1 is connected to the synchronization input of Johnson's counter 2, the outputs of which are connected to input No. 1 of the channel of the multichannel reversal unit 3. The first channel outputs of the multichannel block 3 reverse form a group of device outputs 4-4.1, the second outputs of these channels are outputs 5-5.1. A bus zeroing device 6 is connected to the zeroing input of counter 2 Johnson. Each channel of the multichannel block 3 reverse contains the elements AND NOT 7–9. The first inputs of the elements AND-NOT 7 and 8 are connected to the first input of the channel. The second inputs of the elements AND-NOT 7-9 are connected to the second input of the channel. The output of the element AND-NOT 7 is connected to the second input of the element AND-NOT 8 and the first input of the element AND-NO 9. The output of the element AND-NE 8 is connected to the output 4 of the channel. Output25

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That AND-NOT 8, to the other input of which also receives a single signal from g, the output of the element AND-NOT 7. At the output of the element AND-NO 8 (output 4), a zero signal is generated, and at the output of the element IS-HE 9 (exit 5) formed a single level. This state of the device is conventionally referred to as a forward rotation.

Upon further counting, after a certain time, a single signal is formed on n + K discharge of Johnson's counter 2, and at the output of the NAND element of the first channel of the reverse 3 block, a zero signal is generated, since at the n-output of Johnson's counter 2 a single signal is valid. Therefore, unit levels are formed on the 4 and 5 outputs. This state of the device is Osta45.

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After a certain time, a zero signal is generated again at the output of the counter of Johnson 2. Therefore, at the output of the NAND 7 element of the 3 rpm, i.e. at the first input of the element IS-HE 9, a single signal is formed. Therefore, a single signal is generated at the output 4, and zero at the output 5. This device status is Rotation back.

Then, on the n + K output of Johnson’s counter 2, a zero signal is formed and single signals - Stop, are formed again at outputs 4 and 5. Then the process of the program time relay operation is repeated in a similar way. The operation of the others channel of the multichannel unit 3 reverses about

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That AND-NOT 8, to the other input of which also receives a single signal from g, the output of the element AND-NOT 7. At the output of the element AND-NO 8 (output 4), a zero signal is generated, and at the output of the element IS-HE 9 (exit 5) formed a single level. This state of the device, conventionally referred to as Rotation Forward

Upon further counting, after a certain time, a single signal is generated on n + K discharge of Johnson's counter 2, and at the output of the NAND 7 element of the first channel of the reverse 3 block, a zero signal is generated, since at the moment the n-output of Johnson's counter 2 a single signal about Therefore on unit 4 and 5 unit levels are molded. This state of the device is Osta5.

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After a certain time, at the n-output of the Johnson counter 2, a zero signal is again generated. Therefore, at the output of the NAND 7 element of the 3 reverse unit, i.e. At the first input of the element IS-HE 9, a single signal is generated. Therefore, a single signal is generated at the output 4, and zero at the output 5. This device state is Rotation back.

Further, on the n + K output of Johnson’s counter 2, a zero signal is formed and single signals - Stop, will be generated again at outputs 4 and 5. Then the process of the program time relay operation is repeated in the same way. The operation of other channels of the multichannel unit 3 reverse prog

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Frame Time Relay is similar.

Thus, the time relay responds to the program according to the cyclograms shown in FIG. 2. By connecting the inputs of the multichannel reverser unit 3 to the various outputs of Johnson's counter 2, the program time relay can be varied over a wide range. .

To stop the program time relay, you need to send a signal from bus 6 to zero. At the same time, Johnson's counter 2 is zeroed out and single signals are produced at the outputs - Stop.

Claims (2)

1. Software time relay containing a pulse generator, a counter Rotation forward 0 five 96 0 five 0 6 and a reverse unit, the outputs of which are outputs of the device, characterized in that, in order to increase reliability by simplifying the device while simultaneously expanding its functionality, the counter is executed in the form of a Johnson counter, the synchronization input of which is connected to the output of the pulse generator, and the zero input is with the device zeroing bus, the outputs of the Johnson counter are connected to the corresponding inputs of the channels of the reverse-unit block, made multi-channel. I 2. Relay according to claim 1, characterized in that each channel of the multichannel reverse unit is made in the form of three AND-NOT elements, the first inputs of the first and second of which are connected to the first input of the channel, and the second inputs of the first and third are connected to the second input of the channel , the output of the first element AND-NOT connected to the second input of the second element AND-NOT and the first input of the third element AND-NOT, the output of the second element AND-NOT connected to the first output of the channel, the output of the third element AND-NOT connected to the second output of the channel.