SU714386A1 - Data exchange device - Google Patents

Description

I / -L.,;

The invention is related to the field of computer technology and can be used in automated process control systems and industrial processes for distributed objects.

A device is known that contains a priority scheme, a decoder of a group of And elements, control keys, transmit and receive readiness keys, keys of an analog, amplifiers, and OR SH elements.

The drawback of the device is that the information exchange initiative comes from subscribers.

The closest in technical essence to the proposed invention is a device for data exchange, comprising an input / output unit connected to the input and output of the device and through synchronization, coding and decoding units connected to the control unit, the first input of the encoding unit is connected to the first output

the information receiving unit, the first output of the decoding unit is connected to the second input of the coding unit, the second output of the decoding unit is connected to the first. The inputs of the operation mode setting block, the address receiving block, the information receiving block, the input-output blocks of the operation mode setting blocks, the address reception and the second input of the information receiving block are connected to the outputs of the control unit, the first input-output of the interface block is connected to the fourth input-output the control unit, the second input / output of the interface unit is connected to the inputs of the operation execution units, the third input and the third output of the interface unit are connected respectively to the first output of the address receiving unit and the third input of the receiving unit the second output of which is connected to the second input of the interface unit

AND.

However, the known device has the disadvantage of

The fact that to search for initiative blocks of operations, as well as the functional elements included in their composition, which have put up a request for communication, is three. considerable time, since such a search is carried out for several communication cyclora. You increase the duration of the exchange of information through the communication channel.

The purpose of the invention is to reduce the time of information exchange.

The goal is achieved by; that the device contains a priority block 6p 6: resolution and addresses, the first input of Kotoporo is connected to the corresponding output of the control unit, the second input is connected to the OUTPUT of the interface block, and the first and second outputs of the priority address definition are connected to the second input of the control unit Receive address and the fourth input of the information receiving unit, the fifth input of which is connected to the second output of the address receiving unit.

The drawing shows a diagram of a device that contains an I / O unit 1 that receives and outputs a pv signal over a communication channel, converts the signal level, and takes Mbrs from the communication channel to a level accepted for the system of elements on which the device blocks are executed , and also the inverse conversion by the level of signals sent to the communication channel, synchronization unit 2, synchronizing the | this device S during the communication cycle, control unit 3, organizing the operation of all the blocks, and the algorithm defined by the operation mode device, coding unit 4, representing information entered into a communication channel in the form of a serial K0 {5 code, block, 5 decoding, performing control, and decoding information received from a communication channel, block 6 setting modes of operation, implemented Shmbkda: commands To organize various modes of operation of the device, block 7 receiving i addresses, receiving code of the address of this device, as well as code of the address of blocks. performing operations, an information receiving unit 8 for receiving serial information transmitted to a receive-receiver bd, as well as for receiving 11H (| an ST-6CH1Ka block transmitted on a communication channel, an address determining address, |

the formation of the codes of the address of the initiative blocks of operations and functional elements included in their composition, with the highest priority, the 1Q interface block, which allows independently of the functions performed to connect the required number of execution blocks

ft ..

operations through a unified interface, blocks 11. . . And vypol

0 operations with a variable functional composition of the equipment, intended for switching and transforming into digital form of continuous frequency signals, input positional

5 and coded signals, specifying reference frequencies, time and time intervals, outputting signals in discrete form, storing them and converting them into electrical analogue, continuous

Digital and discrete signals, control of amplifiers of executive devices, devices of digital indication, signaling, digital recording devices and perforators.

The setting of the blocks 11 to perform certain functions is carried out by installing the corresponding functional elements in the blocks.

The exchange of information through the communication channel is carried out synchronously in cycles. Each cycle consists of clock cycles, one bit of information is received or output for one clock cycle. The synchronization of the operation of the device is carried out by a sync pulse coming from the communication channel before the start of each cycle. In order to evaluate the reliability of information transmission over a communication channel, a serial correlation code is used.

The device works as follows.

The sync pulse from the communication channel goes to block 1, which converts the input signal by level, and then to the input of block 2, which allocates a sync pulse, and accordingly generates a signal to the input of block 3 that drives the blocks

5, 6 and 10 in the initial state.

Through the first three cycles of the communication cycle, a command code is transmitted from the communication channel to the device, which is transmitted through block 1 to the input of block 5, controlled

Claims (1)

 block 3. Block 5 monitors and decodes each bit of information that is then sent to the output of block 6, controlled by block 3. 57 If information is distorted, a fault signal is generated, which from the output of block 5 is fed to the input of block 3 and prohibits further reception of information from the communication channel. At the end of the communication cycle, block 5 generates a fault signal, which is fed to the input of block 4, where it is encoded into a correlation code and then, via block 1, is allocated to the communication channel. After receiving the command code, the device operation is determined by the state of block 6, which is transmitted to block 3, which organizes the operation of all blocks in the corresponding modes. The following device operation modes are provided, defined by the command code:. -installation is common; -determining the address of the device with a COMMUNICATION request} -determining the address of the operation execution block and the functional element with the communication request ;. - establishing communication; -transmission of information to block 3.1 - receiver; V-reception of information from source block 11; -the repetition of information; block 11 - the source. JB mode, the installation of a common carHian from the output of block 6 enters the input of block 3, which forms a control signal arriving at the corresponding block 1 input of block 10, after which the latter installs the blocks lli. in the initial state. In the cycle assigned to this device, block 3 generates a response signal about the installation of blocks 11 ,,,, 11., to the initial state, which is sent to the input of block 4, where it is represented in the correlation code, and through block 1 it is output to the communication channel. When operating in the mode of determining the address of a device with a communication request, the signal from block 6 enters the input of block 3, in which the position signal of the light of availability of a communication request, which was received by block 10 from blocks 11, is formed at the clock allocated to this device |. . . and transmitted to the input of block 3. The specified response signal is fed to the input of block 4, where it encodes c in the correlation code, is transmitted to the input of block 1 and further to the communication channel. In the mode of determining the address of the block of operations and functional. 6 elements with a request for a PI after block 6 receives a command code, in block 7 the code of the address of the device that placed the call request signal is entered. In this case, in block 7, the received address code is compared with the address assigned to this device. If the codes do not match, block 7 generates a corresponding signal arriving at block 3, which disconnects the device from the communication channel of the given communication cycle. When the codes coincide, block 3 generates a control signal arriving at the input of block 10. At the same time, the last scientific research institute organizes a parallel poll of communication requests of all initiative blocks 11 connected to block 10. In this case, blocks 11 form an input-output bus: unit u signals. communication request that arrives Yes block 9 input. Block 9 converts the positional signals of the communication request blocks 11 to the binary code of the block 11 address with the highest priority. The specified code is entered into block 7. BLOCK 7 converts the binary code of the block 11 address with the highest priority into a positional address signal, which is fed to the input of block 10, Block 10, controlled by block 3, organizes a parallel poll of communication requests of functional elements. In the corresponding bits of the information buses of block 11, communication request signals are generated for the initiative, functional elements of block 11, which through block 10 pass to the input of block 9. Block 9 converts positional signals requests for COMMUNICATION of functional elements in the binary code of the address of the functional element with the highest priority. Then the binary code of the address of the functional element from block 9, as well as the binary code of the address of block 11 from block 7, are copied to the corresponding bits of the register of block 8 and at subsequent cycles of the communication cycle from block 8 through blocks 4 and 1 are output to the communication channel. In the connection establishment mode, communication is organized with the unit for performing operations in order to check the availability and readiness of the selected functional element included in this unit, to receive information, if that is a functional element-receiver, and to issue information, if it is functional. .l ,,, L ,, ll T1TG p-UPP OTG fflVTIKII ION, fifth element source. In this case, the code of adros of the selected device is entered into the block 7 by the corresponding ticks from the communication channel, and the received code is compared with the address assigned to this device. When the codes coincide, block 7 forms: m the corresponding signal arriving at block 3, which organizes the further reception of information. At the same time, the block 7 address register is set to its initial state, and the block address code is entered into it by the corresponding clock. After entering the specified address code into block 7, block 8, the functional element address code and the channel number code for the multichannel functional elements are entered into the corresponding clock cycles . Thereafter, block 3, through block 10, organizes communication with the block for performing operations .; : -; In this case, block 8 transmits; the address code of the functional element and the code of the channel number through cell 10 to block 11 in accordance with its received address, where the functional element corresponding to the previously received address is sampled. In turn, the block; K 11 notifies that the functional element is ready for communication; the state signals are set, which are credited to the block 3 through the block 1O. The block 3 transmits the signals of the state of the functional block to the corresponding measures (the block 4, and then, they are output to the communication channel through block 1. In the mode of transmitting information to the I-receiver unit, information is received from the communication channel by the corresponding clock to the register of block 8, which should be transmitted to the receiving unit, after which the specified information is transmitted on the receiver unit, with The connection was established in the previous communication cycle.If in the connection establishment mode, the connection was established with the 11-source block, then the following mode receives information from the 11-source block, in which the information from the source block is 10 is entered into the register of block 8, and then transmitted to the communication channel by the corresponding clock. The mode of repeating the transmission of information from the 11-member block is used in the event of a failure. In this mode, the information outputted to the channel in the preceding operation cycle of the device is transmitted to the channel zi again without referring to the block re-istochni1Ch This is necessary when using blocks 11 razrushayuscheys information when reading ,. When the device operates in all of the above modes, at the end of the communication cycle, block 5, monitoring each bit of information received from the communication channel, outputs to the block 4 a positional signal indicating the presence or absence of a fault, which is encoded and through block 1 to the communication channel. Thus, the introduction of a priority address determination block into a device has reduced the number of communication cycles required to search for initiative blocks for performing operations and their functional elements, which reduces the time of information exchange through a communication channel. The invention The device for data exchange, containing a block, input-output connected to the input and output of the device and through synchronization blocks, Xy (uniting and decorating) connected to the control unit, the first input of the encoding unit, the first the output of the decoding block is connected to the second input of the coding block, the second output of the decoding block is connected to the first inputs of the block for specifying the modes of operation, the block for receiving the address, the block for receiving information, the inputs-outputs for the blocks modes of operation, reception of the address and the second input of the information receiving unit are connected to the outputs of the control unit, the first input output of the interface unit connects to the fourth input of the control unit, the second input output of the interface unit is connected to the inputs output of the operation units, The first input and output of the interface unit are connected respectively to the first output of the address receiving unit and the third input of the information receiving unit, the second output of which is connected to the second input of the interface unit, characterized in that, in order to reduce and the time of information exchange, the device contains the block of priority determination of the address, the first input of which is connected to the corresponding output of the control unit, the second input - to the output of the block,