SU881724A1 - Device for input of requests from subscriber to electronic computer - Google Patents

Description

The invention relates to computing technology and can be used in devices for collecting and preprocessing data of automated process control systems (APCS) based on electronic computers. Automated process control systems are currently widely used in various areas of the national economy. Increasingly, automated control systems are used in agricultural production to automate hydraulic and land reclamation facilities. An important parameter of control systems in the course of this is hardware simplicity of devices and, accordingly,. their cost is low, which significantly increases the efficiency of their use and contributes to the speedy implementation. In the various types of automated process control systems, the problem of information exchange between computers and peripheral devices is always solved. Among the existing ways of exchange, there are two ways to choose: the one that is inactive on the part of the peripheral device and the other on the initiative side. In the first case, the computer establishes communication with one receiver or source of information according to the program. Such devices have circuit simplicity, but have narrow functionality and cannot be used in operational process control systems. The second method involves the establishment of communication with the peripheral device and the computer on the initiative signal from the receiver or source of information (module). Usually there are two types of initiative signals: Request for source modules and Fault for receiver modules. Devices using initiative modules allow, firstly, to promptly enter information into a computer at the request of a source, process it and influence the technological process, and secondly, with the help of receivers, signal about this and facilitate its early elimination.

The known scheme of scanning the interrupt register, which allows the computer to receive the initial signals of the functional modules and determine the addresses of the latter to move the computer to the desired part of the program. To determine the address of the initiative module, these devices include registers, i.e. memory elements for storing initiative signals. The location occupied by this signal in the register is set to the address of the module flj.

The disadvantage of the device is the hardware complexity of the circuit for determining the address of the peripheral device generating the initiative signal, which limits their use in the control system.

The closest in technical essence to the present invention is a device for inputting a subscriber's request into a computer. In the device, the initiative signals Request and Fault come over the radial buses to the block controller and are written into the corresponding registers, in which the bit-by-bit signal storage takes place. The modular signals are combined to form the generalized signals of the Request and Fault block, coming through the source interface, of various blocks to the control panel and further to the computer. According to special commands from a computer, the positioning code FROM the corresponding register is read through the layout scheme to the information buses and transmitted to the computer. According to the presence of information units in certain bits of the received positional code, the size of which coincides with the number of modules in the block, the computer determines the address of the module generating the initiative signal. On a signal the request of a computer polls the sources of information, after which the signal request disappears. The device has the ability to exclude the request signal from a particular module by masking. On a signal A computer malfunction signals a module malfunction and does not exchange information with it.

The disadvantage of the device for determining the address of the initiative module of the controller REV of the TM-130 telemetry complex is the hardware complexity, expressed by the need to have the signal storage registers of the Signal and Request registers with a total number of bits twice the number of modules in the unit.

The purpose of the invention is to simplify hardware information exchange with a computer and reduce energy consumption by a device for - input from a subscriber into a computer.

The goal is achieved by

that the device containing the request mask register, the request masking block AND, the output group of the request mask register is connected to the first group of inputs of the request block AND block, a group of OR elements is entered, a switch, an OR element, a synchronization block, and the second group of elephant inputs And the salary masking unit is connected to the input buses. The device request, the output group is connected to the first inputs of the elements OR groups, the second inputs of which are connected to the input buses. roystva, groups OR element outputs are connected to inputs of OR element group and the first switch input, a second group of inputs of which is connected to the address input rails

the device module, the output is connected to the first input of the synchronization unit, the second input of which is connected to the output of the OR element, the output of the synchronization unit is the output of the device.

The proposed solution allows to exclude the Request and Fault signal storage registers from the scheme of the known device, the layout scheme for overwriting the contents of the registers to computer information buses and the OR elements to form generalized Request and Fault signals.

The device's input signal interface signals Query and Fault

Claims (2)

In one common signal it is possible, since one particular module usually outputs only one of these signals: information source — Request, receiver 55 Fault, and the computer itself determines by the module that this is the initiative signal. The task of determining the address of a module programmatically performs a computer by iterating over the bus address of the module of all possible addresses, while analyzing at its input the presence of a generalized initiative signal. If the address given to the computer coincides with the address of the module that issued the Request or Fault signal, then the generalized signal at the input of the computer disappears. This is achieved by gating the generalized signal with the help of a switch, to the control inputs of which a module address code is supplied by a Request or Fault signal of each module in the block. The drawing shows a device for inserting applications from a subscriber into a computer. The device contains a block of I elements And request masking, a request mask register, bus 3 Request, group 4 elements OR, bus 5 Subscriber malfunction, switch 6, element 7 OR, synchronization unit 8, computer unit 9, bus 10 Module address The first group of inputs of the block 1 elements And the masking of requests is connected to the group of outputs of the register 2 of the request mask, and the second group of inputs is connected to the input buses 3 Query The outputs of block 1 are connected to the first inputs of the OR elements of group 4, the second inputs of which are connected to the input terminals 5 Subscriber failure The outputs of a group of 4 elements OR are connected to the first group of inputs of the switch 6 and element 7 OR, the output of which through the synchronization unit 8 is connected to the input of the computer communication unit 9 The second input of the unit 8 is connected to the output of the switch 6, g torus-Rupp input coupled to address buses 10 modulation. The device works as follows. On one or several tires .3 Request or tires 5 Fault of the subscriber receive initiative signals from subscribers (applications). Signals from busses 3 A request is sent to block 1 and, depending on the contents of register 2 of the request mask, then to a group of 4 OR elements. The other inputs of the elements of OR group 4 are given signals from buses 5 subscriber failure .. A group of elements of a bitwise OR group 4 is connected simultaneously to the inputs of the switch 6 and element 7 OR The latter, if at least one signal is present, the Request or Fault generates a generalized initiative signal (the ), which through the synchronization unit 8 enters the computer communication unit 9 and then to the computer. The control inputs of the switch 6 are supplied with signals from the bus 10 Module address. Depending on the address code, the first input of the synchronization unit 8 through the switch 6 is connected to the buses passing through the initiative signal (application) of one or another subscriber. When the address given by the computer to the switch 6 coincides with the address of the subscriber who initiated the initiative signal (app), the latter through the switch 6 enters the synchronization unit 8 and blocks the generalized signal from passing to the computer. The computer, analyzing every time after issuing a new address, the presence of a generalized signal at its input, when it disappears, adds an address to the memory of the machine in order to organize work with the module having this address in accordance with the program. Having searched all possible address codes, the computer records all addresses of subscribers that generate initiative signals (applications). By setting the addresses, memory in the machine, which of the subscribers are sources of information, and which are the receivers, the computer determines the type of information signal: Request or Fault. Thus, the device for inputting applications from a subscriber into a computer allows solving the problem of determining the address of an initiative subscriber programmatically without using memory elements. The logic circuits used in the invention consume less energy and are less costly compared to the memory elements of the known device, which reduces the overall costs of manufacturing and operating the process control system. The invention includes a device for inputting a subscription from a subscriber to an electronic computer that contains a request mask register, a request masking block, and a group of outputs of the request mask register is connected to a first group of inputs of the request masking block, characterized in that device and reduce energy consumption, introduced into him a group of elements OR, switch ,. the OR element, the synchronization unit, the second group of inputs of the AND block of the mask and the request connected to the input buses. Device request; a group of outputs connected to the first inputs of the OR elements, the second inputs of which are connected to the input buses. with the inputs of the SHS element and the first. group of inputs of the switch, the second group of inputs of which is connected to the input buses The address of the device module, the output is connected to the first input of the synchronization unit, second whose input is connected to the output of the OR gate, the output sync block is the output device. Sources of information taken into account in the examination 1. Japanese patent number 52-7301, cl. G 06 F 9/18, published 1978 2. OKR No. 31584508. Catalog of instruments and means of automation and teleautomation for reclamation systems. M., TSBNTI, 1978 (prototype). W.