SU1251088A1 - Information input device - Google Patents

Abstract

The invention can be used in numerical control systems for machine tools. The invention allows for improved device reliability. The behavior of the device element, the element and the new connections eliminates the effect of changing the parameters of the input signal on the operation of the device, which increases its reliability. 1 il.

Description

The invention relates to automation and computer technology and can be used in direct control systems from a computer by a group of computer numerical control machines (CNC).

The purpose of the invention is to increase the reliability of the device by eliminating the influence of changes in the parameters of the input signal on its operation.

The drawing shows a block diagram of the proposed device.

The device for inputting the control program contains the first 1, second 2, third 3 and quarter 4 differential amplifiers connected to the first 5, second 6, third 7, fourth 8 twisted pairs of telephone cable 9, respectively, register 10, trigger 11, group of elements AND , 2, the first 13, the second I4j, the third 15 elements AND, the first 16 and the second 17 elements OR, the element NOT 18, the drives and the inputs 19-21 of the device. . .

The device works as follows.

Before the start of input, the device is reset to the initial state by the logic 1 signal at the first 20 input, the 10-bit register 10 is reset to the initial state 01 000 00000, the trigger 11 in the initial state generates the enable signal to the first And 13 element and the inhibit signal the second element and 14,

In this case, a logic 1 signal is simultaneously sent to the inputs of the third 3 and fourth 4 differential amplifiers, at the outputs of which different polarity pulses are transmitted, transmitted via the third 7 and fourth .8 telephony cable 9, respectively. The transmission of the output signals of the third 3 and fourth 4 differential amplifiers is a request for inserting into the CNC system of the machine of the next symbol of the control program. The transmission of the UE symbol is carried out sequentially, one by one, by the interpolar pulses of the first 5 and. second six twisted pairs of telephone cable 9.

The transfer of a single digit of the code symbol UE is carried out in different ways. simultaneous pulses simultaneously

251088. 2

the first 5 and second 6 twisted pairs of telephone cable 9. Moreover, the first twisted pair 5 is common for the transmission of different polarity pulses

5 unit and zero bits of the symbol UE in the code 1 0. The input device of the control program receives sequentially different signals of the single and zero bits of the code O of the symbol UE using the first I and

second 2 differential amplifiers, lei.

Upon receipt of the inputs of the first 1 and second 2 differential amplifiers of simultaneously polarized impulses corresponding to the transmission of a single bit of code, the output of the third element And 15 generates a signal of logical 1, the incoming

20 to the information input of the register 10 and to the counting input of the trigger 11, to produce an account modulo two unit bits in the code of the symbol UE.

Information received in the register

75 10, on the falling edge of a single signal on the code of the first I differential amplifier, is moved one bit to the right by a single signal at the first shifting input

30 register 10,

After receiving the eighth check bit of the code of the UE symbol at the second output of the register 10, a logical 1 signal is generated, which supplies35 the second inputs of the first 13 and second 14 And elements,

When the state of the trigger 1I corresponding to the source, the code of the symbol UE is even, the signal of the logical I

40 at the output of the first element And 13 syncronizes the transmission of the eight-bit code of the symbol UE through a group of elements 12 at the output 19 of the device. In case of parity violation

The 45 code of the symbol UE trigger 11 goes into the opposite state, and the signal of the logical 1 on: the input of the second element AND 14 sets the device to the initial state. At the outputs of the third 3 differential amplifier form a different junction pulses for the repetition of the transmission of the code of the UE symbol.

When the next UE 55 character is entered, the device cycle is repeated. If there is an emergency, a logical signal I l is sent from the CNC machine to the second input 21 of the device

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and at the output of the fourth differential amplifier 4, a fault signal is generated, transmitted to the fourth 8 twisted pair telephone cable 9.

The use of the essential distinguishing features of the device makes it possible to increase its reliability by eliminating the influence of the input signal parameters on the operation of the device. .

Claims (1)

Invention Formula The information input device containing the first to fourth differential amplifiers, the inputs of the first and second differential amplifiers are the information inputs of the device, the outputs of the third and fourth differential amplifiers are the information outputs of the device of the first group, the trigger, the two And elements, two elements. OR, a group of elements AND, the first inputs of which are connected to the output of the first element AND, which is the synchronous input of the device, the second inputs of elements AND of a group are connected to one register output, another output of which is connected to the first inputs of the first and second elements AND, the second input of the first element And connected to the first trigger output, the second output of which is connected to 0884 the second input of the second element And the outputs of the elements AND of the group are information outputs of the device of the second group, characterized in that, in order to increase the reliability of the device by eliminating the influence of changes in the parameters of the input signal on its operation, the third element AND whose output is connected to the register clock input, the element input is NOT and the first input of the third element is AND is connected to the output of the first differential amplifier, the output of the second differential amplifier is connected to the second input ohm t of the second element, the output of which is connected to the counting input of the trigger and to the information input, the register, the installation input of which is connected to the installation input of the trigger and the input of the third differential amplifier, is connected to the output of the first element OR, the first input of which is connected to the output of the second element And, the second input of the first element OR and the first input of the second element OR are the first control input of the device, the second input of the second element OR is the second control input of the device, the output of the second element OR is connected to the input of the fourth differential amplifier. R R 7/7 Afff 1p I / f // 18 15 g // BUT 20 21 / /four Y t. : tM. sixteen 17 Compiled by I. Alekseev Editor T. Miteiko Tehred I. Gaidosh, Proofreader M. Samborek Order 4412/46 Circulation 671 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4