SU1254438A1 - Device for controlling the manufacturing process - Google Patents

Abstract

The device relates to the field of control of production processes and can be used in discrete control systems, for example, in the coal and mining industries. The purpose of the invention is to simplify the design of the device, which will lead to an increase in its reliability. The device for controlling production processes contains a switching unit, AND-NES elements, a memory unit, an OR element, a decoder, an output unit, a timer unit, and a control unit. Due to the input to the device of the decoder and the switching unit, which, when the connection in the device changed, made it possible to significantly reduce the number of bits of the second memory block (permanent storage device), the number of AND-NOT and SH-NOT elements decreased. i2 il (L IsD SD 4 4 ;: 00 00

Description

I1

The invention relates to devices for controlling production processes and can be used in discrete control systems, for example, in the coal and mining industries (control of mine hydrotransport, mine rail transport, drainage installations, etc.)

The purpose of the invention is to simplify the design of the device, which will lead to an increase in its reliability.

Fig, 1 shows a diagram of the device

agencies; in fig. 2 is a control block diagram; in fig. 3 is a timing diagram of the operation of the control unit.

The device contains a switching unit 1, an element AND-NOT 2, an element AND-NOT 3, a block 4 of memory, a trigger 5, a control block 6, elements AND-NOT 7 and 8, an element OR 9, a decoder 10, a block 11 of a loop, a second a memory unit 12 and a timer unit 13.

The control unit 6 consists of a generator of 14 pulses, two RS-triggers 15 and 16, the element 17 and the element AND-18.

The second input unit 11 is connected to. the fourth output of the control unit 6. The switching unit 1 is a multiplexer, for example, made on the K155KII7 chip. The information output block consists of several independent output channels that control the mechanisms of a technological object by commands received via a decoder 10 s:;: the first memory block 4 when there is a signal from the OR element 9. The second memory block 12 consists of several RS - triggers, the activation and disabling of which is carried out according to commands received through the decoder 10 from the first memory block 4 in the presence of a signal from the element OR 9. The timer block 13 consists of several elements

delays, which are turned on and off using the RS trigger by commands, acting through the decoder 10 from the first memory block 4 in the presence of a signal from the OR element 9. The first memory block 4 is a read-only memory drive & read amplifiers. The drive has any design, for example, made on ferrite Ø-cores, etc.

0

five

five

The device works as follows.

The initial state of the memory elements in the circuit of the device follows: at the output of the trigger 5, connected with the NAND 7 element, there is a signal 1, and at the output connected with the NAND 8 element - the signal O, to the output of the second element 12 the memory is a signal O, at the output of the memory element of the timer unit 13 is the signal O. The initial states of the memory elements are set automatically using their automatic setting schemes when the power supply voltage is applied to the device.

The device control unit 6 operates as follows.

In the initial position, all counting triggers of the device are in the zero state. The first counting trigger 15 generates signals (point 8) arriving at the first memory block 4 — a permanent storage device (ROM).

Using the signals of the first 15 and second 16 counting triggers, as well as the pulse generator 14, on the elements 17 and AND-NE 18 of the control unit 6, the information recording permission signal is formed in the output units 11, the second memory unit 12 and the timer unit 13 (point O and the trigger setup signal 5 to the initial state (point e).

A program is read from the first memory block 4 by a signal from the control block 6 (dot). Each cycle of the device operation is conditional: but divided, for example, into four sub-strokes. On the first punch can be programmed processing direct, and on the second - inverse values of input variables. On the third time, the result of the Conjunction operation (element AND-NE 7) or Disjunction operation (IS-NOT element 8) is programmed over all input variables in 0 output unit 11, the second memory unit 12 and the timer unit 13 by feeding to the inputs of the decoder 10 of the binary code of the program of the first memory block 4, which defines the address at 5 which you need to enter information.

The fourth operation tactic of the device is used to form

five

0

five

signal set trigger 5 to its original state. For example, on the second cycle of operation of the device, the inclusion of the second memory block 12 is programmed, and on the tenth its shutdown when some different logical conditions are fulfilled, which are programmed at the input according to the device operation algorithm. If the first condition is fulfilled, then the second memory block 12 is turned on. When the second logic condition is fulfilled, which corresponds to the device operation algorithm, the RS flip-flop of the second memory block 12 is turned off.

On the elements AND-NOT 2 or 3 using the switching unit 1 sequentially in time, the variables A, f f t arrive. The choice of the desired variable is made using the program signals from the first memory block 4 to the input of the switching unit.

The direct value of the variable is supplied to the element AND-NOT 2, and the inverse to the element AND-NOT 3. These values of the variables are processed on the specified elements using program signals from the first memory block 4.

When performing a disjunction on a variable, its programming is carried out in such a way that the value of the program coincides with the value of the variable, and when performing the Conjunction operation, it is opposite to it.

40

45

The programming of the disjunction and conjunction of the input variables arriving through the switching unit 1 is performed on the AND-HE elements 2 and 3 using the signals of the program of the first memory unit 4, which are fed to the other inputs of the indicated elements. These signals are software and take logical values of 0 or 1. When performing Disjunction operation over the direct value of the input variable, the input of the AND-NOT element 2 from the first memory block 4 receives a signal 1, and the AND-NOT element 3 - signal O. When performing the Disjunction operation on the inverse value of the input variable, the input of the NAND 3 element from the first memory block 4 receives a signal 1, and the NAND.2 element receives the O signal. When performing the Conjunction operation on the pr the first value of the input variable to the input element AND-NOT 2 from the first block 4 memory signal O, and the element AND-NOT 3 - signal 1. When the Conjunction operation is performed over the inverse value of the input variable, the input of the element AND-NE 3 from the first memory block 4 receives the signal O, and on the element I- NOT 2 - signal 1.

So, when performing the Disjunction operation on the input variables A,

p, v, which follow

In time, the IS-NE 2 and 3 elements arrive, trigger 5 is triggered if the expected variable of the function coincides with the program value of the signal. At the end of the device operation cycle, the output processing signal from the control unit 6 to the NAND 7 and 8 elements is processed using the enable signal. Disjunction on the NID 8 element is programmed using the program signals of the first memory block 4. If the trigger 5 contains information on the execution of the Disjunction operation on the variables Ap,, p, & from its output, the element AND-NOT 8 receives permission to perform the Disjunction operation on the input variables. If the Disjunction operation is performed on the input variables on the NAND 8 element, then its output receives the enable signal through the OR 9 element on the decoder 10. Entering the result of the Disjunction operation into the output block 11 or the second memory block 12, or block 13 the timers are made using the output signals of the decoder 10. The address to which information is to be entered is determined using the code of the input signals of the decoder 10, coming from the first memory block 4 according to the device operation program. After the information from trigger 5 is entered into output unit 11 or second memory unit 12, or timer unit 13, trigger 5 returns to its initial state according to the signal from control unit 6 and the device goes to the second operation cycle. When the device transitions to the second cycle of operation, from the output of the control unit 6, the IS-HE elements 7 and 8 receive a inhibitory signal at the time of execution, for example, operations

Conjunctions over input variables A, p, s. Programming sequentially incoming input variables, i; From the switching unit on the NE-NE2 elements, the E3 is produced in such a way that the value of the program is opposite to the value of the variable. When performing the Conjunction operation on all the required input variables, it does not trigger the trigger. 5, i.e. it is in the zero state.

At the end of the device operation cycle, the NAND elements 7 and 8 from the control unit 6 receive a permission signal for recording information from the trigger 5 to the output unit 11, the second memory unit 12 or the timer unit 13. At this time, programming of the recording of the Conjunction operation on the NAND 7 element to the output block 11, the timer block 13 or the second memory block 12 with the signal of the first memory block 4 is performed. When the trigger 5 is in the zero state, from its second output, an enable signal is sent to the NAND 7 element. The NE-7 element issues an enable signal through the OR element 9 to the input of the decoder 10. The result of the Conjunction operation is entered into the output unit 11, the second memory unit 12 or the timer unit 13 is produced using the output signals of the decoder 10. The address to which you need to enter information is determined using the code of the input signals of the decoder 10, which, according to the program of operation of the device, comes from the first memory block 4.

Such a construction of a device with 32 AP inputs, 32 outputs 2 "and 16 feedback p requires 16 bits of the first memory block (against 96 in the prototype) and allows reducing the set of elements OR OR NOT

as well as the connections between them, which simplifies the device and, consequently, increases its reliability.

five

Claims (1)

Invention Formula A device for controlling production processes, containing 0 control unit connected by the first output to the first input of the first memory block, output block, second memory block, timer block, first AND-NOT elements, the first inputs of which 5 are connected to the first outputs of the first memory block these and outputs to the first inputs of the trigger, the second input of which is connected to the second output of the control unit, as well as the second elements 0 AND-NOT and an OR element, characterized in that, in order to simplify the construction of the device, a descrambler and a switching unit are inserted into it, the direct and outputs of which are connected to the second inputs of the first AND-NOT elements, the control inputs - to the control ones the outputs of the first memory block, the third outputs of which are connected to the first inputs 0 decoder, fourth outputs to the first inputs of the second AND-NOT elements connected by the second inputs to the third output of the control unit, outputs through the OR element to the second input of the decoder, the first outputs of which are connected via the timer unit to the first input: the switching unit, the second the input of which through the second memory block is connected to the second outputs of the decoder connected by the third output to the first input of the output block, the second input of which is connected to the fourth output of the control unit — the trigger outputs are connected to 5 third inputs of the second element and NOT. Order 4718/50 Circulation 836 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 FIG. 2