SU1255994A1 - Device for entering control program in numeric-control system - Google Patents

Abstract

The invention} 1 relates to numerical program control (CNC) and can be used in group control systems for computer machines. The purpose of the invention is to simplify the design. The device allows reducing the number of wires for the communication line, eliminating transformer connections and reducing the size by using for decoding information and galvanic isolation from the communication line of unit 1 and zero 2 optocouplers, whose inputs, i.e. LEDs, connected on-parallel, For each impulse of the request, the CNC system. 18, the computer 17 transmits to the first pair of wires 15 of the communication line nine different polarity pulses separated by pauses, the polarity of the first pulse corresponding to a single value, and the polarity of the subsequent ones depends on the transmitted information. These. impulses depending on polarity are sensed by optocoupler 1 or 2, yes. through amplifier 3 or 4, threshold element 5 or 6 are fed to the inputs of the OR element 7 and from its output are fed to the shift input of the shift register 10, and the unit signal goes and to the information input of the register 10. The incoming signals themselves are recorded and shifted in the register 10. The unit at the ninth output of the register 10 informs the CNC system that the received information is set at the other outputs of the register. The register is reset after receiving this byte through delay element 9 and element OR 8, as well as when the TNC issues a Reset signal. The Reset and Inquiry signals, arriving respectively at the inputs 11 and 12 of the device, are transmitted via the second pair of wires 16 of the communication line through repeaters 13 and 14. 1 sludge. Q S (L K9 followed QD 4

Description

one

The invention relates to numerical control (CNC) and can be used in group control systems for computer machines.

The purpose of the invention is to simplify the design of the device by reducing the number of wires for the communication line, eliminating transformer connections and reducing the size of the device.

The drawing shows the block diagram of the device.

A device for inputting control programs contains single and zero optocouplers 1 and 2, the input element of each of which is a LED. The inputs of optocouplers 1 and 2 are turned on counter-parallel in the same way. counter-parallel inclusion obganyh semiconductor diodes. A single optocoupler 1 responds to a positive polarity signal, a. null optocoupler 2 - on the signal of negative polarity. In addition, the device contains the first and second amplifiers 3 and 4, the first and second threshold elements 5 and 6, the first and second elements OR 7 and 8, the delay element 9, the shift register 10, the first and second inputs 11 and 12 of the device, the first and second repeaters 13 and 14, first and second pair of wires 15 and 16 lines of communication.

The device through the communication line is connected to the computer 17, and its outputs are connected to the CNC system 18.

The device works as follows.

Before starting, and also in the process of operation, the CNC system 18 issues a signal to the first input 11 of the device, Reset, which goes to the second input of the element OR 8, passes to the installation input of segistoa 10 and zeroed - 45 elements OR 8, the signal from which / k- „„, - „, pry on the set-up input

ten.

em it. The reset signal also arrives at the first output repeater 13, which outputs to the second pair of wires 16 of the communication line a signal indicating the computer 17 that the CNC system 18 is in the initial state.

On the signal The request of the CNC system, which is fed to the input 12 of the device, the second repeater 14, generates a signal, which polarity is reverse polarity of the Reset signal, to the external link.

register

The presence of a single signal before 50 each transmitted byte makes

the receiving part of the device is immune in between requests for interference, commensurate with the signal of zero value information, since 55 such interference does not change the state of the zero register 10.

The use of optocouplers whose inputs are included anti-parallel.

559942

For each impulse, the computer sends to the device via the first pair of wires 15 of the communication line nine different polarity pulses separated by pauses, the polarity of the first pulse corresponding to a single value, and the polarity of the subsequent ones depends on the information value of each bit of the transmitted byte.

These pulses are sent to optocouplers and 2, the inputs of which are included in anti-parallel, therefore, one of the optocoupler perceives signals only of positive polarity, and the other | Ha - negative.

 The signals from the output of optocouplers 1 and 2. through amplifiers 3 and 4, the threshold elements 5 and 6 are fed to the inputs

ten

(five

0

element OR 7, in addition, the signal.

five

corresponding to the information unit, / also arrives at the information input of the shift register 10, and the threshold elements 5 and 6 pass only those signals that are sufficiently high. The signal from the output of the element OR 7 enters the shift input of the shift register 10, records and shifts the information received at the information input, i.e. each 0 incoming signal on the communication line itself records and shifts in register 10 and, thus, the serial code is converted into a parallel one.

After receiving nine pulses from the communication line, a single signal appears on the ninth output of the shift register 10, which is transmitted to the CNC system, and the device thus informs that the remaining outputs of register 10 have received received information.

In addition, the signal from the ninth output of the register 10 enters through the delay element 9 to the first input

five

0

ten.

register

The presence of a single signal before each transmitted byte makes

the receiving part of the device is insensitive in the period between requests for interference, commensurate with the signal of the zero value of the information, since such interference does not change the state of the zero register 10.

The use of optocouplers whose inputs are included anti-parallel.

for decoding received signals and galvanic isolation of a device with a communication line, it reduces the number of wires for a communication line, the use of threshold elements ensures high reliability of data reception, and the exclusion of transformer connections ensures simplicity of hardware implementation and allows you to make a device completely of microelectronic elements , which significantly reduces its size.

Claims (1)

Invention Formula A device for inputting a control program to the CNC system, comprising the first and second amplifiers, the delay element, the first and second OR elements, the first input of the first OR element, is connected to the information input of the shift register, which, in order to simplify Editor P.Kossey Order 4822/47 Compiled by I.Shvets Tehred M.Hodanich Corrector Circulation 836 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. Production and printing company, Uzhgorod, Projecto st., 4 five 0 five 0 device designs, and the first and second optocouplers, two threshold elements and two repeaters, the outputs of which are connected to the first outputs of the device, and the inputs - to the first inputs of the device, and the input of the first repeater are connected through the first input of the second element OR to the reset input shift, the output of the last bit of which through the delay element is connected to the second input of the second element OR, and the outputs of all bits to the second outputs of the device, the second inputs of which are connected to the corresponding inputs of the first second photocouplers whose outputs are connected through respective amplifiers to the inputs of the first and second threshold elements, the outputs connected to first and second inputs of said first OR gate, respectively, whose output is connected to the shift input of the shift register. Proofreader S. Chokmar