SU1195343A1 - Information input device - Google Patents

Description

The invention relates to computer technology and automated control systems and is intended for the input of discrete initiative signals into a control computer complex, for example, flexible automated productions (GAL}, injection molding, one of the main elements of which is a casting machine (LM), equipment - Juridical control system, and real-time computer.

The purpose of the invention is to increase the reliability of the device by blocking. 15 level of entering false information.

The drawing shows a functional diagram of the device.

The device contains a block of forming information signals · 20 (block of discrete sensors), switch 2, counter 3, trigger 4, delay element 5, timer 6, second element 7 OR, first element 8 OR.

Switch 2 operates in such a way that, in accordance with the code set on its control inputs, its output is connected to the corresponding information input.

At the same time, the sensor of the first cycle of unit 1 is connected to the zero informational 30 input of the switch 2, to the first informational sensor of the second cycle, etc. As a switch 2, for example, a multiplexer 35 can be used.

The time of the timer 6 is set somewhat longer than the maximum inter-cycle time of the LM operation cycle. 40

'Trigger 4 switches over the leading edge of the signal at its clock input when there is an “O” at the device reset input.

The device works as follows 45 times. · „'

Before the beginning of the next cycle of operation of the LM in the control system, a reset signal is generated, which translates the LM to its initial position and arrives at the “Reset” output as a pulse “1". This signal resets the counter 3 and, acting through the element 8 OR, resets the trigger 4 and timer 6. After this set the squadron "0" 55 at the outputs of element 7 OR "Interrupt") · timer 6 ("Alarm") and the outputs of counter 3 ("Tact code"). The code from the outputs of counter 3 is fed to the control inputs switch 2, which connects its zero information input to the output. the reset signal at the input of the device and the appearance of "0" at the input "Reset" of the device, timer 6 begins to count the allowable waiting time for the next cycle cycle, in this case, the first one. The appearance of the signal "1" at the output of the D1 sensor causes the same signal at the switch output 2. The leading edge of the signal appears on the clock input of trigger 4. On the direct output of trigger 4, the same signal is set as on the information input - "1". The last signal through the element 7 IDN comes to the second. the device output ("Interrupt"), shifts the counter to the first position and enters the input of the delay element 5. Changing the code on the counter 3, and consequently, on the control inputs of the switch 2 leads to the switching of the latter. In this case, the output of the switch 2 connects its first input. When trouble-free operation of the LM signal "1" at the output of the sensor D2 unit 1 can not appear before switching switch 2. Therefore, the output of the latter. a "0" appears, which does not change the state of the trigger 4. The duration of the arrival of the interrupt signal is determined by the value of the delay element 5 and is selected so that the computer has time to receive it and start processing.

The signal from the output of the delay element 5 through the element 8 OR resets the trigger 4 and timer 6. After the appearance of the trigger 4 on the direct output 4 "0" reset is removed. Timer 6 starts counting again. The output of timer 6 is stored "0". A similar procedure continues until all cycles of the LM operation cycle have been exhausted, the number of which, naturally, cannot exceed the number of information inputs of switch 2 equal to m = 2 if the number of control inputs is equal to II. After the last cycle of operation of the LM from the control system is completed, a reset signal is sent to the device input and all operations occur in the previously described sequence. Thus, switching of switch 2 is performed by the input information ^{3 itself.}

mation signals and does not require for this special generator.

The emergency mode of operation of the LM is manifested in the form of a non-receipt of a signal from the next sensor of unit 1, or in the form of simultaneous appearance of signals from two adjacent sensors. If the next sensor does not work within the control time ("O" at the output of the corresponding sensor), the timer 6 is activated. vaet. "1" appears at its output, arriving at the first output ("Accident") of the device and through element 7 OR to the second output "Interruption". The presence of "1" at the first output of the device is a sign of an emergency state of the LM, and the signals at the outputs of counter 3 indicate in the binary code the place of the cycle where the fault occurred.

In the case of simultaneous actuation of two adjacent sensor unit 1 "1" signal from the first of them is output switch 2.'V eluchae this signal is generated pre1195343 ⁴

snatching at the output of the second element 7 OR, the timer 6 is reset and restarted, the counter 3 connects to the output of the switch 2 the second

5 of the simultaneously triggered sensors of block 1. Since there is "1" at the output of this sensor, then the same signal remains at the output of switch 2. Therefore trigger 4

10 after reset does not work again. The interrupt signal is not generated, counter 3 does not move, switch 2 does not switch, timer 6 is not reset. After triggering

15 timer 6 signals are formed "Ava: Ria" and "Interrupt", and the state

counter 3, indicates the number of the clock on which the fault occurred.

In the proposed device number

The 20 clock cycle is analyzed in a computer only if there is a signal "1" at the output of timer 6 ("Accident"). Saving computer time is due to the fact that the processing time

25 information is increased only in an emergency.

Claims (1)

A DEVICE FOR INPUT OF INFORMATION, containing an information signal generation unit, the outputs of which are connected to the inputs of the first switch group, the inputs of the second group of which are connected to the outputs of the counter, and the output is connected to the first input of the trigger, the delay element, the outputs of the counter are device group outputs, characterized in that, in order to increase reliability by ensuring blocking the input of false information, the first and second OR elements and the timer are entered into the device, the stroke of which is connected to the second trigger input and output of the first OR element, the first input of which is first the input of the counter, are the input of the device, the second input of the first OR element is connected through a delay element to the trigger output, the first input of the second OR element and the second counter input, the timer output is connected to the second input of the second ele cient OR is the first output device, the output of the second OR gate is the second output of the apparatus. WITH SP WITH 4 ^ WITH > 1 1195343, 2