SU708306A1 - Programme-control device - Google Patents

Description

(54) DEVICE FOR SOFTWARE CONTROL

The invention relates to the field of automation and computing technology. It can be used in systems such as:,: a lot of machine control.

A multi-axis digital linear-speed controller is known, containing the clock and pulse generator with a reference digital divider, divisors of the real-time coordinates with two synchronous circuits;: ;; oscillations, valves, and a discharge unit. viaKCH a lot of signal. This device is overclocking; em and brakes the machine drives according to a certain law to the speed specified in each frame of programm.mm 1.

The disadvantage of such a linear speed regulator is the impossibility of changing the acceleration-deceleration regions depending on the variation of the contact speed, especially in the acceleration stabilization mode.

The closest technical solution to this is a device for software control, comprising a series-connected block, a program, a speed reference block, a control signal switch, and a reversible control unit.

the counter, the second output of the village, is set to -;:; :, rorra:,; vbi golssel.ipo to iirpi jMy р;,. у о.-о: -: а кн; i; : :) DOJi and to the irjpisoM} counter, tO-- co.p; - tltora ci ;; na.j (i% correct: so.i.is.w.: - by the entrance (; ka ana ;;;; p; ll: -: z .-: ..,: 7Ia oii: LM. l gr.,; d - h. pg.:,:.;

taliseytopr ;. m; ::; -: ..; v .-:.; / i V :: iAilPtiT year ;; l1: 1che :; :; C:; Fashion.-Lgl: h; iLJ Signgs upp g;:; -: g P 12.

Not enough; ognogo s1r:,: th; ::; The fact that it is. -... Wowhset has been discussed; the formation of a program without a loss of ICFOR: a: -:; 3 SCHUPS Pb: N UHHDSNK;

(emergency) braking, which dramatically reduces the reliability of the device, pr; 1 water: t to accident and reject; to reduce g1rO: - 3 labor productivity.

Purpose of the invention :; ; - Determining the reliability of the device.

This is achieved by the fact that a computing unit is introduced into the unit, which is connected in series with the lock unit ;; emergency mode. ps;) yy :: lkJiYu4 and pepshchy element OR. well:; -: e chos.ocstsych;

the interlocked node, the second key and the second OR element, the output of which is connected to the second input of the speed setting unit, and the second input - to the counter output, to the second input of the control signal switch and the first input of the interlock node, the second output of which is connected to the second input of the first element OR connected by the output to the input of the program task block, the second input of the blocking node is connected to the second output of the emergency mode control unit, the third output to the third input of the speed setting block and the third input to control signal mutator, the third output of the emergency mode control unit is connected to the second input of the second key, the fourth output to the fourth inputs of the control signal switch, the output of the reversible counter is connected to the fifth input of the control signals switch and to the second input of the first key, and the inputs of the computing unit are connected with the outputs of the analyzer unit, and the output - with the second input of the element BAN.

Functional diagram of the device shown in the drawing. The device contains the program setting block 1, the analyzer block 2, the first analyzer 3 exiting to block 2, the counter 4, the OR 5 element, the speed setting block 6, the blocking node 7, the first element OR 8, the second switch 9, the control signals switch 10 , the emergency mode control unit 11, the second analyzer 12 included in the unit 2, the BANE item 13, the first key 14, the reversible counter 15 and the computing unit 16.

In normal mode, the device operates as follows.

Information on the magnitude of the movement L from the output of block 1 is entered into the counter 4 as an additional code if the counter 4 works on addition, or as a direct code if the counter 4 works on subtraction. At the same time, the analyzer 3, to which this information also arrives, checks the number L for odd and remembers "1 if the number L is odd. At the same time in block 6 receives the value of the specified feed rate and the start signal. Therefore, the signal from the output of block 6 to the switch 10 begins to receive a frequency equal to the feed rate f, which, by the “Start signal begins to increase from FMUH. up to f given, thereby overclocking. From the output of the switch 10, the frequency 2f is fed to the input of the counter 4 and the analyzer 2. At the same time, the frequency f is fed to the input of the analyzers 3 and 12 and the element 13 BANGE, the output of which is the output of the device. In this case, if the magnitude of the displacement L is odd, the first pulse arriving at the input of the element 13 BANGE will be prohibited by the output signal of the analyzer 3, through the block 16

arrives at the prohibitory entry element 13 BAN. Thus, the doubling of the unit of the least significant bit of an odd number is precluded. At the same time, the same pulse information arrives at the summing input of the reversible counter 15. This continues until acceleration to the specified frequency is completed. Then the information on the counter 15 is not received, and the counter 4 gives the frequency f, not 2f, which continues to flow to the output of the device. This continues until counter 4 is in the zero state. In this case, its output signal goes to the switch 10, which causes the disconnection of the counter 4 and the connection of the counter 15 15 to the subtraction. At the same time, the same signal through the element OR 5 is fed to the input of the braking command of the speed-setting unit 6. As a result, deceleration of the output frequency of the block 6 from the given value f to fjow-.TaK begins as the number of pulses recorded in counter 15 is equal to the number of pulses received at its output during the processing of the acceleration section, doubling which provided a pre-production in counter 4, then by the time the end of braking, counter 15 will be in zero state. The signal "On counter 15 arrives at the input of the switch 10 and causes the output of the output information to the element 13 to stop and through the output through the key 14, g, and the OR element 8 gives the command to enter the next frame in block 1. The frame is processed. In the event that the predetermined displacement portion is smaller than the double acceleration (deceleration) portion, then the counter 4 comes to the state zero earlier than the acceleration ends. At the same time, the signal "About counter 4 through the element OR 5 turns on the braking of block 6, and in switch 10 it turns off counter 4 and connects the subtracting input of counter 15. The zero state of the reversing counter is the same as in the previous case completion of the relocation.

If in the process of working out the program frame it was necessary to stop without losing information, press

5 button "Emergency stop on the control panel. In this case, the signal “Emergency stop” is fed to the corresponding input of the emergency mode control unit 11. In this case, two main situations are possible.

First: at the moment of the arrival of the signal "Emergency stop, the device was operating the acceleration section or the section with a constant speed. In this case, the unit 11 generates a signal at the input of the switch 10. This signal turns off the counter and turns on the counter 15 on the subtraction. Simultaneously from the output of block 11 to key 14,

The "Prohibiton" signal is received, and the key 9, on which the "Prohibitory" signal is missing, and the OR 5 element, in block 6, receives the deceleration signal. The deceleration section recorded in the reversing counter 15 begins to work. The signal "On the reversing counter 15 disables the frequency output and its own input, but does not include the processing of the next frame, since the key 14 is closed. Thus, by the end of the emergency braking, the counter 15 will be in the state "O, and in the counter 4 there will remain a number equal to the unworked remainder of the initially given number L, since the anticipation entered during acceleration into counter 4 will be compensated for when the counter is subtracted by counter 15. Analyzer 12, the input of which received the same pulses as the input to the counter 4 is in the state "1, if the number of pulses fed to the counter 4 is odd, and in the state" O, if even. The signal "Emergency start unit 11 generates a signal" Start, which enters the node lock 7. In the described situation, the block node, which has not yet received the signal "On counter 4, switches the received signal from the output of block 11, block 6 input and switch 10 This signal provides acceleration of block 6 and start of switch 10. Thanks to EBomu, the remainder of the movement is processed as a new frame. The peculiarity of working out this frame is only that instead of analyzer 3, analyzer 12 works in conjunction with block 16, which indirectly determine the even-odd remainder to be tested. This is done as follows: in block. 16, the odd signal is stored if the initially specified portion was odd, and the analyzer 12 stores the sign of the even-odd exhausted pre-emergency deceleration of the portion. Due to this, block 16 implements the following logic: there was an odd part of the current, an odd number was worked out — even remained, an odd number was worked out, even number was worked out — odd remained; was even, worked odd - remained odd, was even, worked even - remained even. In the case of an odd residue, the first impulse is subtracted in element 13 of the BAN.

Second: at the time of emergency braking, the device brakes itself. In this case, the signal "On counter 4" is present in node 7 of blocking. Therefore, node 7 prohibits the passage of the braking signal through key 9. At this emergency braking is terminated, since key 14 is also closed. All counters in "O. The “Emergency start” signal in this case through block 11 and node 7 enters the circuit of the OR circuit 8 and starts processing the next frame.

The advantage of this device is the ability to select special modes of operation of specialized machine tools with programmed control, eliminating waste due to emergency braking without loss of information. In the case of emergency braking, a recalculation of waste sections and anticipation values is reversed, so that after an emergency start, a new advance is calculated and the remainder of the movement is processed without loss of information and with preservation of the necessary dynamic modes. As a result, it is possible to eliminate scrap and it is possible to quickly restore mining after a forced shutdown, which is especially important when mining large, high-value workpieces with a large processing cycle.

Claims (2)

1. Authors certificate of SSr. .NO 206566, class G 05 B 11/00, 1969. 2. USSR author's certificate in accordance with the reference number 25С471К cl. G 05 B 19/18, 07.07.77 (prototype).