RU1833874C - Priority device - Google Patents

Abstract

The invention relates to computer technology and can be used in group control systems for numerically controlled machines and other objects. The purpose of the invention is to expand the scope of the device by providing the possibility of its aggregation. The priority device contains a trigger, a register, a counter, a decoder, a multiplexer, an adder, a one-shot, a buffer element, three OR elements, two I. elements. Based on this device, it is possible to build distributed control systems of arbitrary configuration. 2 ill.

Description

The invention relates to computer technology and can be used in group control systems for numerically controlled machines and other objects.

The purpose of the invention is to expand the scope of the device by providing the possibility of its aggregation. .

The essence of the invention consists in providing the possibility of increasing the number of query sources processed by the device by making it possible to connect the same type of aggregated devices without introducing circuit changes inside the device and without using external additional elements.

The introduction of the multiplexer and its communications makes it possible to extract the request signal, which has the highest priority at a given time, and generate a signal on

stopping the search and starting serving the found request.

The introduction of the second OR element and its connections allows you to generate a single signal at the output of the device request when a request is detected by this module, or by a module with a higher priority,

The introduction of the adder and its relations allows the formation of the number of the group to which the found query belongs.

The introduction of the decoder and its connections allows us to record the moment when the search for the module ends and to generate a signal to turn off the module and enable the search for the next module.

The introduction of the buffer element and its connections allows the number of the found request to be transmitted to the device request number bus.

The introduction of a single vibrator and its connections allows you to generate a reset signal

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Just before the end of the device request search cycle.

The introduction of the first OR element allows generating a reset signal of trigger 4 if the request is found by this device (module), or by a higher priority module, or the search cycle for requests is terminated to no avail.

The introduction of the third OR element allows generating a reset signal of the counter 5 upon receipt of the reset signals at one of the two inputs of the reset device.

The introduction of the second AND element allows a signal to be detected when a request is detected by this device if permission has been received from a higher priority device (module).

By using the device according to the invention, a positive effect can be obtained by expanding the field of application of the device.

Figure 1 shows the functional diagram of the device; figure 2 is a functional diagram of a priority device for n x K inputs of a request implemented by combining n proposed priority devices for K input of a request each.

The multi-channel priority device (Fig. 1) contains the first element OR1, register 2, multiplexer 3, trigger 4, counter 5, decoder 6, buffer element 7, adder 8, one-shot 9, third ORI element, first I11 element, second I12 element , the second element OR13, the input of the group number of the device 14, the request input of the device 15, the input of the permission of the device 16, the input of the request of the device 17, the first input of the reset of the device 18, the input of the synchronization of the device 19, the input of the start of the device 20, the second input of the reset of the device 21, the permission output device 22, exit number for dew device 23, the group number output device 24, output device 25, a request, a reset output ustroytva 26.

Consider the purpose of the elements of the proposed device.

The element-IL И1 generates a reset signal of trigger 4 if the request is found by a higher priority module (device), this device, or the search for the request is completed, but the request is not found.

Register 2 is designed to receive, store and issue request signals received at the input 17 of the device. The request signals are recorded in register 2 on the leading edge of the signal received at the synchronization input of register 2 from the output of trigger 4. The register 2 is reset is asynchronous to the reset signal received at the input 18 of the device.

The multiplexer 3 is designed to extract the request signal during sequential search by the address code generated by the counter 5.

Trigger 4 is designed to generate a signal that the device is turned on. It is set to one when

the presence of a single signal at input S along the trailing edge of the pulse input to sync input C. Trigger 4 is reset to zero asynchronously when a single signal arrives at the input Re of the output of element OR1.

Counter 5 is designed to receive the formation of request numbers when they are searched. Switching of the counter 5 to the next state is carried out at the trailing edge of the pulse arriving at the counting input. The counter 5 is reset to zero asynchronously with a single signal supplied to input R.

Decoder 6 has only one output, on which a single signal is generated when a code of number K is received at its input. It is designed to generate a reset signal 3 to zero of trigger 4, i.e. turning off the device at the end of the cycle

search queries. At the same time, the signal from the output of the decoder 6 is transmitted to the output 22 of the device and enables the operation of the device having lower priority.

The buffer element 7 connects the output

counter 5 to the request number bus after it is detected, i.e. issues the request number to the serving device.

Adder 8 generates the number of the group in which the request is issued, summing the number

previously served request groups with a signal from the output of the OR13 element of their device.

The one-shot 9 generates the device signal in the source cocTqflHne at the end

search query cycle.

The element ILI forms a counter reset signal 5.

Element I11 is intended to generate pulses to the counting input of the counter 5 in the search mode for a service request.

Element I12 generates a signal for detecting a request by the device, if the latter is found and there is permission to issue it

from a higher priority device.

1. The request was detected by module 34.p, which has the highest priority.

2. The request was detected by one or several modules 34.K ().

3. The request was not detected by any of the modules 34.1-34.p,

Consider the operation of the device in these modes,

1.Since the output signal of the multiplexer 3 of module 34.p is a single signal, he set trigger 4 of this module to zero, thereby prohibiting the arrival of pulses to the counting input of counter 5. At the same time, the signal from the output of multiplexer 3 passes through an open single signal to input 16 element I12. The signal from the output of the I12 element opens a group of buffer elements 7 and the zero code from the output of the counter 5 of the module 34.p is fed to the output bus of the device request number and then to the output 31 of the request number in the group.

At the same time, the signal from the output of the I12 element of the module 34; p passes through the OR13 element to the output 25 of the module 34.p and then to the input 15 of the module 34.P-1. In the module 34.p-1, this signal returns the trigger 4 to zero through OR 13 to exit 25 and so on. Passing through the modules 34. p-134.1 this signal is output 25 of the module 34.1, which is the output 32 of the request multi-channel device. A signal at this output signals that a request has been issued.

In addition, a single signal generated at the output of the element OR13 module 34.p is fed to the input of the adder 8 of this module. As a result, in the adder 8 of each module 34. P-34.1, an addition to the incoming number of units and output 24 of the module 34.1, which is the output 30 of the group of request inputs, of the device, a number n is generated, indicating that the selected request belongs to the highest priority n-th group.

Having received the request signal from the output 32 of the device, the servicing device, after the time necessary for generating the number of the request group, will read the request and group numbers from the outputs 31, 30, respectively, and will proceed to service the request.

At the end of the service, the service device will generate a reset pulse, which will be fed to the device input 27 and then to the inputs 18 of the modules 34.1-34.p and will return the registers 2 and counters 5 to their initial state. At the same time, the servicing device will set the Start signal, which will go to the input 29 of the device and then to the inputs 20 of the modules 34.1-34.P and allow the search for the next request.

2. If the request with the highest priority is detected by one or more

34.K () modules, then in these modules the query search will be stopped, due to the reset of the triggers 4 of these modules to zero. However, the signals from the outputs of the 5 multiplexers 3 in these modules do not arrive at the outputs of the I12 elements, because at the outputs 22 and 25 of the module 34, n there are zero signals that close the elements I12 and OR 13 of the module 34.p-1. This, in turn, leads to the appearance of zero signals at outputs 22 and

25 modules 34.P-2, 34.P-334.1.

As a result of this, the device will continue to search for the request that has the highest priority,

5 Regular sync pulses from input 28

devices through elements I11 will go to the counting inputs of the counters 5, which with the help of multiplexers 3 will sequentially poll the outputs of the bits

0 registers 2 modules in which a query has not yet been found that has the highest priority in its group.

When a request is detected by module 34.p at the output of I12, a single signal appears,

5 which will stop the process of further search for requests and will be sent to the output of the device 32, informing the service device about the end of the request search process. Device operation in

0 in this case is similar to that described in mode 1.

If after (K-1) clock cycles (K is the number of inputs

17 per module, i.e. number of requests in

. group) module Z4.p the request is not detected, then

5 by the next clock pulse, the number K is written to counter 5 and a single signal is sent to the output of the decoder b, which will reset trigger 4 of this module and will go to output 22 of module 34.p and then to input 16

0 module 34.p-1. If this module has detected a request in its group, then the output I12 displays a single signal that will allow the issuance of the request number in the group at the output 31 of the device and the group number on

5, the output 30 of the device is similar to that described in mode 1 of the device.

If the module 34.P-1 also did not find the request, then at the output of the decoder 6 of this module a single signal is received,

0, which will reset trigger 4 and go to output 22, will enable the analysis of the state of the (34.p-2) -th module and so on until it detects a module that has recorded an incoming request that has the highest priority in its group. This module will issue a request to the outputs 30, 31, 32 of the device, as described above.

3. If there are no requests at the outputs 17 of all modules 34.1-34.P, then to the registers

2, zero information will be recorded. As a result of this, at the output of the decoder 6 module 34.1, a single signal is received, which will trigger the single-shot 9 and the pulse generated by it will go to the output 26 of the module 34.1 and then to the output 21 of the modules 34.1-34.p. This pulse will return, to the initial state, the counters 5 of all modules, the device will return to its original state and at the next pulse at the input 28 will go into a repeated request search cycle.

Claims (1)

SUMMARY OF THE INVENTION Priority device comprising a register, counter, trigger, first element AND, wherein the device request inputs are connected to the unit inputs of the register, the output of which is connected to the information input of the multiplexer, the first device reset input is connected to the register reset input, the device synchronization input is connected to the sync input trigger and the first input of the first element And, the output of which is connected to the counter input of the counter, the start input of the device is connected to a single input of the trigger, the output of which is connected with a second input of the first AND element, characterized in that, in order to expand the scope of the device by allowing it to be aggregated, a multiplexer / decoder, an adder, a buffer element, a one-shot, a second AND element, from the first to the third OR elements are introduced into it moreover, the counter output is connected to the information inputs of the decoder and the buffer element, as well as to the address input, multiplexer, output which is connected to the first input of the first OR element and the first input of the second AND element, the decoder output is connected to the second input of the first OR element, the device enable output and the one-shot input, the output of which is the device reset output, the device enable input is connected to the gate decoder input and the second the input of the second element And, the output of which is connected with the gate input of the buffer element and the first input of the second OR element, the input of the device request is connected to the second input of the second OR element, and the third input of the first OR element, the output of which is connected to the trigger reset input, the first and second inputs of the device reset are connected to the first and second inputs of the third OR element, respectively, whose output is connected to the input counter reset, the trigger output is connected to the register synchronization input, the output of the second OR element is connected to the device request output and the first adder input, the output of which is connected to the device group number output, the device group number input is connected to the second adder input, the output of the buffer element is the output device request numbers. . ... 3V.n 77 F $ S Yes Const., 1 76 Mia ftlt J5P- :% ng nineteen twenty LTFIrL and b # m about 21 .L 25 Threat / 7 Z8 S to ngs 86 al LOTLII- tier g f Editor Compiled by G. Timonkin Tehred M. Morgenthal Corrector L. Livrints st D TG 1 5 5Z. 8 sff 2J 75 -J-J G thu neither 2J and 7 / ABOUT 26 - &: Phig. 2