SU1509894A1 - Multichannel device for servicing group requests - Google Patents

Abstract

The invention relates to automation and computing and can be used in designing a control system for a group of CNC machine tools from a computer. The aim of the invention is to simplify the device. A multichannel device for serving group requests contains a control unit 1 consisting of three elements OR 4-6, two binary decimal counters 2, 3 and a pulse distributor 7 and N channels 8. The device prioritizes the group requests according to the sequence the binary-decimal queue number codes assigned to the requests in the order of their arrival eliminates conflict situations with a random flow of requests from a group of CNC machines.

Description

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The invention relates to automation and computing and can be used in designing a control system for a group of CNC machine tools from a computer.

The purpose of the invention is to simplify the device.

 Figure 1 presents the scheme of the device; figure 2 - diagram of the channel in the device.

The device contains a kit (Fig. 1) control block 1, two binary-decimal counters 2 and 3, three elements

On the leading edge of the next clock pulse at the corresponding i-M output of the pulse distributor 7, a logical 1 signal is generated at the output of the AND 25 element of the i-ro channel. In the i-ro channel register 24) the binary-ten code is written

1-SHI 4-6, distributor 7 pulses, 15 turns in a group of 20 code inputs

channels b ,. , request inputs, respectively, from the outputs binary inputs 10 (End of Service, the highest decimal counter. 2. Binary-ten moves 11,. m 5-outputs, N resolution, the actual code of the queue number, recorded output 13 of the request, clock input 14, Ny in register 24 i-ro channel post20

general reset input 15, output groups of 16-18 channels, distribution outputs group 19 of 7 pulses, code input groups of 20 and 21 channels.

Each channel contains (Fig. 2) two triggers 22 and 23, a register 24, a comparison circuit 25, two elements AND 26 and | 27 and an element OR 28.

The device works as follows.

Before starting the operation, the device is reset with the logical 1 signal at the input 15 of the general reset of the device, the binary decimal counters 2 and 3 are reset, the triggers 22 and 23 of all channels 8, -8 4 are set to zero state In this case, the registers of 24 all channels are set in .1 ... 1 state.

Service requests for a group of 40 CNC machines arrive at random times in the form of logic 1 signals to the corresponding request inputs 9 of the device. The clock input 14 of the device is supplied with clock 45 pulses, the arrival period of which is chosen two to three orders of magnitude shorter than the minimum signal duration of logical 1 at the device's request inputs 9, i.e. equal to 1 - 2mk / s

Consider the operation of the device on the example of servicing a request from one of the CNC machines of a group connected to a randomly selected 1st channel,, ..., -N, where N is the number of device channels.

When a logical 1 signal arrives at the i-request input 9 of the device, trigger 22 of the i-ro channel

falls on the first group of inputs of the circuit 25 comparing its channel.

At the moment of coincidence of the code signals on the first and second groups of inputs of the circuit 25, comparing the i-ro channel

25, a logical 1 resolution signal is generated at the i-th output 12 of the device. On the falling edge of the clock pulse at the i-th output of the distributor. 7 pulses of the trigger 23, the i-ro channel goes to one state and a logical 1 signal is generated at the output 13 of the device request.

On the falling edge of the logical 1 signal at the output of the AND 26 i-ro: channel, one is added to the contents of the binary-decimal counter 2. After the request is satisfied, the i-ro channel, i.e. after receiving the next frame of the control program of the part processing program, the CNC system of the i-ro channel with the logical 1 signal at the service end input 10 resets the trigger 22 of its channel to the zero state and sets the status to 1 ... 1 - the channel 24 of its channel, the logical O signal from the direct output of the flip-flop 22 is fed to the output 11 of the i-ro channel of the device. On the falling edge of the clock pulse at the i-th output of the distributor 7 pulses, the trigger 23 of the i-channel returns to the zero state and the logical O signal from the direct output of the trigger 23 of the i-ro channel

HS enters the output request 13 device.

On the falling edge of the logical 1 signal at the output of the element I 27 of the i-ro channel to the content of binary 50

enters the unit state on the falling edge of the next clock pulse at the clock input 14 of the device, and a logical 1 signal is generated at the i-th output 11 of the device.

On the leading edge of the next clock pulse at the corresponding i-M output of the pulse distributor 7, a logical 1 signal is generated at the output of the AND 25 element of the i-ro channel. In the i-ro channel register 24) the binary-ten code is written

queues for a group of 20 code inputs

0

five

0 5

falls on the first group of inputs of the circuit 25 comparing its channel.

At the moment of coincidence of the code signals on the first and second groups of inputs of the circuit 25, comparing the i-ro channel

5, a logical 1 resolution signal is generated at the i-th output 12 of the device. On the falling edge of the clock pulse at the i-th output of the distributor. 7 pulses of the trigger 23, the i-ro channel goes to one state and a logical 1 signal is generated at the output 13 of the device request.

On the falling edge of the logical 1 signal at the output of the AND 26 i-ro: channel, one is added to the contents of the binary-decimal counter 2. After the request is satisfied, the i-ro channel, i.e. after receiving the next frame of the control program of the part processing program, the CNC system of the i-ro channel with the logical 1 signal at the service end input 10 resets the trigger 22 of its channel to the zero state and sets the status to 1 ... 1 - the channel 24 of its channel, the logical O signal from the direct output of the flip-flop 22 is fed to the output 11 of the i-ro channel of the device. On the falling edge of the clock pulse at the i-th output of the distributor 7 pulses, the trigger 23 of the i-channel returns to the zero state and the logical O signal from the direct output of the trigger 23 of the i-ro channel

With the output of the device request request 13.

On the falling edge of the logical 1 signal at the output of the element And 27 i-ro channel to the content of binary 0

from counter 3, one is added. Servicing of subsequent requests from an i-ro channel CNC machine is similar.

In the case of simultaneous arrival at the request inputs 9 of the device, a group of requests from CNC machines, the triggers of the 221.15098946 corresponding channels

the first binary decimal block of the control unit is connected to the first groups of inputs of the comparison circuits of all

channels, the single output of the first trigger of the i-ro channel is connected to the i-th output of the device, the register outputs of each channel are connected to the second group of inputs of the comparison circuit

Newly switch to a single soy-jg th channel, characterized by

20

that notion. The transition to the unit state of the flip-flops 23 of the corresponding channels is divided in time in accordance with the moments of the arrival of the clock pulses to the inverse clock inputs of the triggers of the 23 corresponding channels of the device from the same outputs of the 19 output groups of the distributor 7 pulses.

Moreover, the moments of arrival of signals from logical 1 from the outputs of elements AND 26 of the corresponding channels determine the sequence of writing the binary-decimal codes of the queue to the registers of these 24 channels of the device.

The servicing of a group of simultaneously received requests from CNC machines is carried out by the device sequentially and independently, in the same way as described. The sequence of servicing group queries is set by the device in accordance with the sequence of binary-decimal codes of the queue numbers recorded in the registers 24 corresponding channels of CNC machines. At the time of the end of the group service of requests from CNC machines, a logical signal O is generated at the output 13 of the device request.

In order to simplify the device30

It contains in each channel the OR element, the first input of the OR element of each channel is connected - the zero inputs of the first and second binary-decimal counters of the control unit and the general reset input of the device, the second input of the OR element of each channel is connected to the iM input the end of service of the device, the output of the OR element of each channel is connected to the zero input of the first trigger of its channel and its own register input

The 25th channel, the first input of the first element AND of each channel is connected to and the second clock input of the second three channel of its channel, the inverse clock input of the first trigger of each channel is connected to the input of the pulse control unit and the clock input of the device, the inverse output of the first trigger each channel is connected to the zero input of the second trigger of its channel and to the second input of the second element AND its channel, the direct output of the first trigger of each channel is connected to the single input of the second trigger of its channel and the second input of the first element AND of its channel, the direct output of the second trigger of each channel is connected to the third input of the second element AND of its channel AND the corresponding input of the first element OR control block, the output of which is connected to the output of the device request, and the full output the second trigger of each channel is connected to the third inlet

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Claims (1)

Invention Formula A multichannel device for servicing group requests, comprising a control unit including a pulse distributor, three OR elements and two binary-decimal counters and N channels (where N is the number of requests), and in each channel there are two triggers, two AND elements, the comparison circuit and the register, with (i 1, ..., N) sup {the pulse distributor is connected to the first inputs of the first and second elements of the i-ro channel, the outputs of the first binary-decimal counter of the control unit are connected to the information inputs of the registers of all channels, outputs the second is that in order to simplify It contains in each channel the OR element, the first input of the OR element of each channel is connected - the zero inputs of the first and second binary-decimal counters of the control unit and the general reset input of the device, the second input of the OR element of each channel is connected to the iM input the end of service of the device, the output of the element OR of each channel is connected to the zero input of the first trigger of its channel and the set input of the register of its channel, the first input of the first element AND of each channel is connected to the inverse clock by the second trigger of its channel, the inverse clock input of the first trigger of each channel is connected to the input of the pulse distributor of the control unit and the clock input of the device, the inverse output of the first trigger of each channel is connected to the zero input of the second trigger of its channel, etc. my output of the first trigger of each channel is connected to the single input of the second trigger of my channel and to the second input of the first element I of my channel, direct output of the second trigger of each channel is connected to the third input of the second element AND of its channel AND to the corresponding input of the first element OR control unit whose output is connected to the device request output, the inverse output of the second flip-flop of each channel is connected to the third input i the house of the first element AND of its channel, the output of the first element AND of each channel is connected to the clock input of the register of its channel and with the corresponding input of the second element OR the control unit, the output of which is connected to the inverse counting input of the first binary-decimal counter of the control unit, the output of the second element AND of each channel is connected to the corresponding input of the third OR element of the control unit, the output of which is connected to the inverse of the counting 15098948 the first input of the first trigger of the i-ro channel is connected to the i-th request input of the device, the output of the comparison circuit the second input of the binary binary-1st channel is connected to the 1st output of the counter of the control unit, one-enable device; FIG. 2