SU1649541A1 - Multichannel device for group request servicing - Google Patents

Abstract

The invention relates to computing technology and can be used in designing a control system for a group of CNC machines from a computer. The purpose of the invention is to increase speed. The device contains a distributor of 1 pulses, counters 2, 3, elements OR 4-6, channels 7. Each channel 7 contains a register, a comparison circuit, two triggers, four AND elements, two OR elements, 2 Il.

Description

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

The purpose of the invention is to increase speed.

FIG. 1 is a block diagram of the device; in fig. 2 is a block diagram of the device channel.

The device contains (Fig. 1) a pulse distributor 1, counters 2 and 3, elements OR 4-6, channels 7, signal output 8 of the device, clock input 9 of the device, input 10 of the device interrupt, input 11 of the device reset, query inputs 12 of the device, response inputs 13 of the device, code outputs 14 of the device, information outputs 15 of the device, outputs 16 and 17 of counters 2 and 3, respectively, outputs 18-20 of channels 7 and outputs 21 of the distributor 1 pulses.

Channel 7 (FIG. 2) is formed by a register 22, a comparison circuit 23, triggers 24 and 25, elements AND 26, and elements OR 30 and 31.

The device works as follows.

When the power is turned on, the clock pulses arrive at the device clock input 9, the arrival time of the clock pulses is usually 2-3 orders of magnitude shorter than the duration of signals 1 on input groups 12 and 13. Before starting, the device is reset with signal 1 at input 11 of the device reset. In this case, triggers 24 and 25, registers 22 and counters 2 and 3 are zeroed.

Subscriber service requests are received at random times in the form of t signals to the corresponding inputs 12 of the device.

Consider the operation of the device on the example of servicing a single request.

When a signal 1 arrives at the input 12, the trigger 24 of the switch 7 goes into one state on the leading edge of the next clock pulse at the output 21 of the pulse distributor 1. At the same time, at the output of the channel element 26, a single pulse is formed, on the leading edge of which a binary queue code is written to the channel register 22 from the output 16 of the counter 2.

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The binary code of the queue number recorded in the channel register 22 is fed to the first inputs of the channel comparison circuit 23. At the moment of coincidence of the codes at the first and second inputs of the comparison circuit 23, a signal 1 is generated at the output of the circuit 23, which is fed to the first inputs of the channel elements 28 and 29.

On the falling edge of the clock pulse at the output 21 of the pulse distributor 1, the second channel trigger 25 goes into one state and one is added to the contents of counter 2. If there is a signal 1 at the output of the channel comparison circuit 23 at output 15, a signal 1 is generated, which is the transmission request signal of the next frame of the control program.

After the request of the system channel is satisfied by the signal 1 at input 13, the register 22 and the triggers 24 and 25 of this channel are reset to zero. On the falling edge of signal 1 at the output of the element 27, one is added to the contents of the counter 3. The maintenance of subsequent channel requests is made similarly. If it is necessary to terminate a transmission session at the initiative of the servicing device, signal 1 is fed to input 10 of the device and resets register 22 to zero, channel triggers 24 and 25 and adds one to the contents of counter 3. In the case of multiple requests to the request inputs 12, multiple triggers 24 and 25 channels travel to the unit state in accordance with the arrival times of the clock pulses from the same outputs 21 of the distributor 1 pulses. In this case, the moments of arrival of signals 1 from the outputs of the elements AND 26 channels determine the sequence of writing the queue codes in the registers 22 of these channels. The service of a group of simultaneously received requests is performed by the device sequentially, independently and in the same way as described. The order of servicing group requests is determined by the presence of signal 1 at the corresponding output in accordance with the sequence of queue number codes recorded in the registers of these 22 channels. At the time of the end of the group 5164954

In order to service the requests, an O signal is generated at the output 8 of the device.

Claims (1)

A multichannel device for servicing group requests containing a pulse distributor whose input is connected to a clock input of the device, the first and second counters, three OR elements, channels, each channel contains the first and second triggers, four AND elements, Two OR elements, a register, the comparison circuit, in each channel the first group of inputs of the comparison circuit is connected to the output group of the register, the second group of inputs of the comparison circuit is connected to the output group of the first counter, the outputs of the second counter and connected to the information inputs of the channel registers, in each channel the output of the first element OR is connected to the zero input of the first trigger of its channel, the single input of the first trigger of each channel is connected to the same input of the first group of device request inputs, the first input of the first OR element of each channel is connected to the same the input of the group of response inputs of the device, the clock input of the first trigger of each channel is connected to the same output of the pulse distributor, the output of the second element OR of the channel with the input of zeroing the register of its channel, the first inputs of the second elements of the OR channels, the inputs of zeroing the first and second channel triggers, the zeroing inputs of the first and second counters are connected to the device reset input, which is due to the fact that, in order to improve the device performance, my output of the first channel trigger is connected to a single input five 0 five 0 five 0 five sixteen The second trigger of its channel and the first input of the first element of its channel, the second input of the first element of the channel connected to the inverse output of the second trigger of its channel, the inverse output of the first channel trigger connected to the zero input of the second trigger of its channel the channel, the clock input of the second channel trigger is connected to the clock input of the first channel of its own, the direct output of the second trigger of each channel connected to the corresponding output of the group of code outputs of the device, to the first input of the third element AND of its channel, to the second input of the second element AND of its channel and to the corresponding input of the first OR element, the output of which is the signal output of the device, the second input of the third And channel element connected to the output of the comparison circuit and with the first input of the fourth element AND of its channel, the output of the third element AND of each channel is connected to the corresponding output of the group of information outputs of the device, the second inputs elements of the channel are connected to the interrupt input of the device, the output of the fourth element of the AND channel is connected to the second input of the first element OR of its channel, the output of the first element of the channel is connected to the clock input of the register of its channel and to the corresponding input of the second OR element whose output is connected to the counting the input of the second counter, the output of the second element AND of the channel is connected to the second input of the second element OR of its channel and with the corresponding input of the third element OR, the output of which is connected to the counting in Odom first counter.