SU1762310A1 - Device for information output - Google Patents

Abstract

The invention relates to automation and computing and can be used in automated process control systems for outputting information from data processing systems to communication channels. The purpose of the invention is to expand the scope of application by providing information output to the communication channel in a sequential code. The device comprises first and second counters, a pulse generator, a third counter, a comparison unit, a memory unit and a switch. 2 Il.

Description

The invention relates to automation and computing and can be used in automated process control systems for outputting information from data processing systems to communication channels.

The purpose of the invention is to expand the field of application of the device by providing information output to the communication channel in a serial code.

Figure 1 shows the functional diagram of the device for outputting information; 2 shows timing diagrams for his work.

The device for outputting information contains first 1, second 2 and third 3 counters, pulse generator 4, comparison unit 5, memory block 6 and switch 7, a group of information inputs 8 of the device, input 9 of the device recording, information output 9 of the device, output 11 device interrupts.

The device for outputting information operates as follows.

When the device is turned on, a pulse is fed to the reset inputs of the first 1 and second 2 meters from the data processing system (not shown) and zeroed them.

When the codes received on the first and second groups of inputs of the comparison unit 5 coincide with the groups of outputs of the first 1 and second 2 counters, respectively, the equality output of the comparison unit 5 forms a high signal level and enters the reset input of the third counter 3, zeroing it.

If the group of control inputs of the switch 7 contains a zero code received from the group of outputs of the bits of the third counter 3, the information output 10 of the device through the switch 7 receives a high signal level.

The information that is output from the data processing system to the communication channel is word by word written into memory block 6 as follows.

On the leading edge of the pulse arriving at the input of the record 9 of the device from

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data processing system, the word of information received by the group of information inputs 8 of the device from the data processing system is recorded in memory block 6 at the address whose code came to the first group of address inputs of memory block 6 from the group of bits of the first counter 1 ,

On the trailing edge of the pulse arriving at the input to the device record 9, the content of the first counter 1 is increased by one.

The information recorded in memory block 6 is word for word transmitted to the communication channel as follows.

If the codes received on the first and second groups of inputs of the comparison block 5 do not match, the output of the equality of the comparison block 5 results in a low signal level and is fed to the reset input of the third counter 3.

If there is a low signal level at the output of the equality of the comparison unit 5, the third counter 3 is used to recalculate the pulses received at its counting input from the output of the pulse generator 4.

The information word recorded in memory block 6 at the address whose code entered the second group of address inputs of memory block c from the group of bits of the second counter 2 bits is formed on the group of outputs of memory block 6 and goes to the group of information inputs of switch 7.

In accordance with the sequence of codes received for the group of control inputs of switch 7 from the group of outputs of bits of the third counter 3, the start (low signal level), informational (formed on the output group of memory block 6) and stop (high signal level) bits through the switch 7 is sequentially received at the information output 10 of the device and further into the communication channel.

The counting module of the third counter 3 is equal to the number of bits in the serial code transmitted by the device to the communication channel.

On the falling edge of the pulse arriving at the counting input of the second counter 2 from the high bit output of the third counter 3, the content of the second counter 2 is increased by one.

When the codes received on the first and second groups of inputs of the comparison block 5 coincide, the output of the equality of the block of comparison 5 forms a high level

the signal and enters the reset input of the third counter 3, it is wrapped,

The impulse generated at the equality output of the compare block 5 enters the output of the interrupt 11 of the device and then to the data processing system.

When receiving a comparison signal from the device, the data processing system records the next information in the memory block 6 for transmission to the communication channel.

Figure 2 shows the pulse signals:

a - at the input of the device 9; b - at the output of the lower bit of the first counter 1;

in - at the output of the pulse generator 4;

Mr. on the output of the younger bit of the third counter 3;

d - at the output of the senior bit of the third counter 3;

e - at the output of the lower bit of the second counter 2;

g - at the output of the equality of the block compared to 5;

h - at the output of the switch 7.

Claims (1)

Invention Formula A device for outputting information containing a memory block, a comparison block and two counters, the information inputs of the memory block are information inputs of the device, the outputs of the first counter are connected to the address inputs of the first group of the memory block and the inputs of the first group of the comparison block, the outputs of the second counter are connected with the inputs of the second group of the comparison unit, the equality output of which is the interrupt output of the device, characterized in that, in order to expand the field of application by providing information output to the channel connection in the serial code, a third counter, a switch and a pulse generator are inputted into it, the output of which is connected to the counting input of the third counter, the low-order outputs of which are connected to the control inputs of the switch, and the high-level output is connected to the second counter, the address inputs of the second group of the memory block are connected to the outputs of the second counter, the equality output of the comparison block to the reset input of the third counter, the recording input of the memory block and the count input of the first counter are the recording input of devices a, the outputs of the memory unit are connected to the information inputs of the switch, the output of which is the information output of the device. 8 g - 9-Mz1 L 4 H 2 f. one l MP J.l.l MM I 1 П П Л ЛП P. 1 I. L .one . . 1. L 1. 1 M