RU101551U1 - CONTROLLER FOR MANAGING COMPLEX OBJECTS - Google Patents

Abstract

 A controller for managing a complex object, containing a microcontroller with RAM, blocks of two serial CAN interfaces and two serial RS-485 interfaces, blocks of serial Ethernet interfaces and two serial RS-232 interfaces, a control circuit, a data bus, a Compact Flash memory block, a non-volatile real-time clock time, CAN transceiver unit, TU, TS channel blocks, RS-232 service port, UART driver block, power supply, each of the CAN and RS-485 serial interface blocks contains a power unit, an indication unit and a gal isolation and interface node, characterized in that it additionally includes four blocks of serial RS-485 interfaces, a UART transceiver unit, a control unit, a data buffer, a network address setting unit, the output bus of which is connected to the input bus of the control unit, one the input of which is connected to the output of the TC channel block, one of the outputs is connected to the input of the TU channel block, the second output is connected to the input of the data buffer, the first bi-directional bus of the control unit is connected to the microcontroller, in pairs allele data bus connected to the data buffer, the second bi-directional bus of the control unit is connected to a non-volatile real-time clock, the third bi-directional bus of the control unit is connected to the RS-232 service port, the fourth bi-directional bus of the control unit is connected to a memory unit whose data bus is the data bus of the blocks CAN and UART transceivers and the data buffer data bus are combined into a bi-directional parallel data bus, the transmission of information through which is controlled by the control unit via control circuits.

Description

The utility model relates to the field of computer technology, in particular, to automation systems for controlling technological processes of complex industrial facilities, and can be used as a central processing unit in distributed and centralized complexes and telemechanics systems, data collection, technological control, energy metering at facilities electric power, oil production, industrial enterprises and other industries.

The technical result that manifests itself when using the proposed utility model is the ability to collect and transmit information from a large number of smart devices with various interfaces and exchange protocols, versatility, ease of use.

A known controller containing a printed circuit board on which a microcontroller is located, which collects information from pulse channels and transmits via RS-232 interfaces, which is used to connect to a computer, RS-485 and CAN interface, providing remote connection to an object, a lithium cell, non-volatile memory, remote control channel, real-time clock, power supply, additional printed circuit board with clamps for connecting pulse channels, while the real-time clock is made with built-in power -volatile memory, a CAN controller is a separate chip [1].

The reason that impedes the obtaining of a technical result provided by the claimed utility model using the described utility model is the inability to remotely locate the computer relative to the control and management point, since this requires long lines for communication with the smart devices of the control object, which is due to the use of analogue for communication with a RS-232 computer.

The closest in technical essence - the prototype of the claimed utility model - is a programmable logic controller for building distributed fault-tolerant information and control systems, which contains a microcontroller and RAM, which allow executing a control program, a non-volatile Compact Flash memory card to change the control algorithm and maintain working protocols Ethernet, CAN, RS-485, 1-wire interfaces galvanically isolated from internal power circuits for connecting sensors, computers and other programs mimic controllers, with the organization of duplicated communication channels and providing "hot" redundancy, built-in real-time clock for determining the time of the event, configuration unit and external error, temperature sensor, as well as analog I / O lines, discrete water / output lines with diagnostic functions load break, short circuit to + U, -U, short circuit, overheating, overvoltage protection, as well as an indication unit for displaying the status of mechanisms, sensors and the most programmable control Lera. The programmable controller operation algorithm is loaded from the Compact Flash memory card and depends on the requirements for a specific control system [2].

Signs common to the claimed technical solution and prototype are the following: the presence of a microcontroller with RAM; availability of Ethernet, CAN, RS-485 interfaces; the presence of non-volatile real-time clocks; the presence of non-volatile memory Compact Flash; the presence of a power supply; the presence of channel blocks TU and TS (discrete water / output lines in the prototype); the presence of the service port RS-232 (configuration block in the prototype), the presence of display units and galvanic isolation; the presence of UART transceiver blocks.

The reason that prevents the obtaining of a technical result provided by the claimed utility model using the prototype is the limited number of RS-485 interfaces to provide communication with numerous intelligent devices of a complex object having various communication protocols. To implement additional RS-485 interfaces, the programmable logic controller must be additionally equipped with four processor modules, which limits the rate of exchange with smart devices, complicates the controller and dramatically increases its cost.

When developing the claimed technical solution, the task was to create a controller for controlling numerous, having various exchange protocols, intelligent devices of a complex object, quite simple in circuit design, affordable and having a high information exchange rate.

The problem is solved due to the fact that the controller for controlling a complex object containing a microcontroller with RAM, blocks of two serial CAN interfaces and two serial RS-485 interfaces, blocks of serial Ethernet interfaces and two serial RS-232 interfaces, control circuit, data bus , Compact Flash memory block, non-volatile real-time clock, CAN transceiver block, TU, TS channel blocks, RS-232 service port, UART driver block, power supply, each of the CAN serial interface blocks The RS-485 contains a power unit, an indication and galvanic isolation unit, and an interface interface unit; four RS-485 serial interface units, a UART transceiver unit, a control unit, a data buffer, a network address assignment unit, the output bus of which is connected to the input bus, are additionally introduced control unit, one input of which is connected to the output of the channel block of the vehicle, one of the outputs is connected to the input of the channel block of the control unit, the second output is connected to the input of the data buffer, the first bi-directional bus of the control block is connected to the micro the controller, through a parallel data bus connected to the data buffer, the second bi-directional bus of the control unit is connected to a non-volatile real-time clock, the third bi-directional bus of the control unit is connected to the RS-232 service port, the fourth bi-directional bus of the control unit is connected to the memory unit, the data bus of which CAN and UART transceiver unit data buses and a data buffer data bus are combined into a bi-directional parallel data bus, the information transfer through which is controlled by the control unit via The management team.

The utility model is illustrated in the drawing, which shows the structural diagram of the controller for controlling a complex object.

The proposed controller for controlling a complex object is implemented on the basis of a microcontroller with RAM, which performs the computing functions of the controller, implements some communication resources - Ethernet interfaces, two RS-232 and UART interfaces, on which two RS-485 interfaces are implemented, and interacts with non-volatile Compact memory Flash, a control unit that controls the exchange of information between two CAN interfaces and four RS-485 interfaces via a parallel data bus via a data buffer with a microcontroller.

The controller for managing a complex object, shown in the drawing (Fig. 1), contains a control unit 1, the first output of which is connected to the input of the data buffer 2, one bus of which is connected to the microcontroller 3, and the other bus of the data buffer 2 is connected to the UART transceiver unit 4 , to CAN transceiver unit 5 and to memory unit 6, the other bus of which is connected to control unit 1, the corresponding buses of control unit 1 are connected to microcontroller 3 connected to non-volatile memory 7, to network address setting unit 8, to power dependent real-time clock 9 and to the RS-232 service port 10, a reset signal generating unit 11 connected to the output of the microcontroller 3 by an input and connected to the corresponding inputs of the UART transceiver unit 4, CAN transceiver unit 5 and control unit 1, the control circuit of which connected to the UART transceiver unit 4, to the CAN transceiver unit 5 and to the memory unit 6, the corresponding input and output circuits of the microcontroller 3 are connected to the corresponding output and input circuits of the UART driver unit 12.

The controller also contains a power supply 13, six blocks 14 of the serial RS-485 interface, blocks 15, 16 of the serial CAN-1 and CAN-2 interfaces, respectively, a block 17 of connectors, indication and protection of RS-232, a block of 18 channels of the vehicle, a block of 19 channels TU, block 20 connector and indication of the Ethernet network. The outputs and inputs of blocks 14-1, 14-2, 14-3, 14-4 are connected to the corresponding inputs and outputs of block 4 of the UART transceiver, the outputs and inputs of blocks 14-5, 14-6 are connected to the corresponding inputs and outputs of block 12 of the driver UART, the outputs and inputs of blocks 15, 16 are connected to the corresponding inputs and outputs of block 5 of the CAN transceiver. Each serial interface unit 14-1 ... 14-6, 15, 16 contains a power unit, an indication and galvanic isolation unit, and a interface unit with a corresponding external interface. Block 17 of the connectors, indication and protection of RS-232 and block 20 of the connector and indication of the Ethernet network are connected to the microcontroller 3, the channel blocks TC 18 and TU 19 are connected to the control unit 1.

The control unit 1 is a programmable logic integrated circuit and is designed to create a parallel hardware interface of the microcontroller 3 through a data buffer 2, which is implemented as a bi-directional bus transceiver with smart devices of the object via serial interfaces RS-485-1, ..., RS-485-4, CAN-1, CAN-2 and pairing according to signal levels of TU, TS.

The proposed controller operates as follows.

Before the controller starts, a program is developed to control the corresponding technological process and is recorded on a separate workstation on a Compact Flash 7 card, which, after recording, is installed in the controller as an external storage device of microcontroller 3, as well as the program of control unit 1, implemented on the basis of a programmable logical integral circuit (FPGA) and memory block 6 for storing permanent data. FPGA programming of control unit 1 is performed by a separate device (programmer) through the RS-232 10 service port.

When supplying voltage to all the functional nodes of the controller, the microcontroller 3 is initialized through the power supply unit 13. After initialization, the microcontroller 3 diagnoses the control unit 1, directly initializes the external interfaces RS-485, RS-232 and Ethernet - blocks 17, 12, 20, respectively, and through data buffer 2 initializes the external interfaces RS-485 (4) and CAN (5). Then, the microcontroller 3 downloads the working program from the Compact Flash 7 card to the internal memory for execution and starts its execution using the data of the configuration file corresponding to the control system.

Discrete input signals are fed to the vehicle channel block 18, where the presence of discrete input signals is indicated, galvanic isolation and their transmission to control unit 1, where the signals are converted in accordance with the specified levels and transmitted to the input of the microcontroller 3, which collects and subsequently processes information . The microcontroller 3 directly exchanges information with smart devices via two serial RS-232 buses, which are connected to the block 17 connectors, indication and protection of RS-232-1, RS-232-2, and two serial RS-485 buses - with devices, connected to blocks 14-5, 14-6 of the serial RS-485 interface through block 12 of the UART driver.

Microcontroller 3 also exchanges information on the parallel bus with smart devices that are connected to the controller via serial CAN buses, designed to support CAN interfaces of ISO 11898-2 and RS-485 standard, designed to support the physical level of EIA-485 signals, through blocks CAN 15, 16 serial interface, through CAN-1, CAN-2, and RS-485 transceiver unit 5 14-1, ..., 14-4 - through UART transceiver unit 4, through data buffer 2 according to control signals from control unit 1 .

The microcontroller 3 processes information and events collected from smart devices of the TC 18 sensors, processes it, binds to astronomical time read from real-time clock 9, and stores it in non-volatile memory Compact Flash 7.

Discrete output signals are issued directly by the microcontroller 3 to external devices through a block of channels TU 19, which produces special telecontrol signals.

The exchange of information (control commands, state of the control object, configuration, data of smart devices) of the controller with the control point is performed by the microcontroller 3 via the Ethernet interface in accordance with the IEEE 802.3 standard via the Ethernet interface connector block and display unit 20. The network address of the controller in the Ethernet network is set using the switch in the network address setting unit 8.

INFORMATION SOURCES:

1. Patent for utility model No. 61900, publ. 03/10/2007, class IPC G06F 9/00.

2. Patent for utility model No. 83146, publ. 05/20/2009, class IPC G06F 15/16.

Claims (1)

A controller for managing a complex object, containing a microcontroller with RAM, blocks of two serial CAN interfaces and two serial RS-485 interfaces, blocks of serial Ethernet interfaces and two serial RS-232 interfaces, a control circuit, a data bus, a Compact Flash memory block, a non-volatile real-time clock time, CAN transceiver unit, TU, TS channel blocks, RS-232 service port, UART driver block, power supply, each of the CAN and RS-485 serial interface blocks contains a power unit, an indication unit and a gal isolation and interface node, characterized in that it additionally includes four blocks of serial RS-485 interfaces, a UART transceiver unit, a control unit, a data buffer, a network address setting unit, the output bus of which is connected to the input bus of the control unit, one the input of which is connected to the output of the TC channel block, one of the outputs is connected to the input of the TU channel block, the second output is connected to the input of the data buffer, the first bi-directional bus of the control unit is connected to the microcontroller, in pairs allele data bus connected to the data buffer, the second bi-directional bus of the control unit is connected to a non-volatile real-time clock, the third bi-directional bus of the control unit is connected to the RS-232 service port, the fourth bi-directional bus of the control unit is connected to a memory unit whose data bus is the data bus of the blocks CAN and UART transceivers and a data buffer data bus are combined into a bi-directional parallel data bus, the transmission of information through which is controlled by the control unit via control circuits.