RU185710U1 - ANALOGUE CONTROL MODULE - Google Patents

Abstract

The analog control module (UIA) contains a microprocessor configured to test the blocks of the UIA module by supplying a test signal from the microprocessor in a closed loop through an internal data bus, the output data register, a second galvanic isolation unit, a digital-to-analog converter, a control unit and the regulation of output signals, a block protection and regulation of input signals, analog-to-digital converter, first galvanic isolation unit, input data register, internal transmission bus data to the microprocessor. The microprocessor is connected through a buffer register and a data transfer bus with an external processor module of the programmable controller. The analog control module contains an input data register connected via an internal data bus with a microprocessor and designed to receive signals from external monitored devices, an output data register connected through an internal data bus with a microprocessor and designed to transfer data to external monitored devices. The microprocessor is connected by an additional line of communication with the input signal protection and rationing unit for monitoring the condition and diagnostics of open input lines from external monitored devices and a second additional communication line with the output signal monitoring and rationing unit for monitoring the status of the output signals with external monitored devices for diagnosing short circuit faults and interruption of current signals.

Description

Technical field

The utility model relates to technological process control devices implemented on the basis of information and computer technology and can be used to build automatic and automated process control and management systems at industrial enterprises in various industries.

State of the art

A DEVICE FOR CONNECTING A PERSONAL COMPUTER WITH EXTERNAL DEVICES FOR SIMULATING A RADAR SITUATION FOR CONTROL OF INFORMATION FROM OPERATOR RANKS (see, for example, RU 155520 U1, G06F13 / 00, published on 10.10.2015). The specified device contains: a switch, transmitting command amplifiers, a coordination microcontroller unit with a USB port of a personal computer, receiving data amplifiers and transmitting data amplifiers, a data register from an external device, a command register from an external device, a data register to an external device, a command register from an external devices, receiving command amplifiers and transmitting command amplifiers. The first input-output of the switch is connected to the second input-output of the matching microcontroller unit with a USB port, the second input of the switch is connected to the third output of the matching microcontroller unit with a USB port. The third input of the switch is connected to the first output of the data register from an external device, the second input of which is connected to the first output of the receiving data amplifiers, the second input of which is connected to the first output of the bus of the external device. The fourth input of the switch is connected to the first output of the command register from an external device, the second input of which is connected to the first output of the receiving command amplifiers, the second input of which is connected to the second output of the bus of the external device. The fifth output of the switch is connected to the first input of the data register to an external device, the second output of which is connected to the first input of the transmitting data amplifiers, the second output of which is connected to the third bus input of the external device. The sixth output of the switch is connected to the first input of the command register to an external device, the second output of which is connected to the first input of the transmitting command amplifiers, the second output of which is connected to the fourth bus input of the external device. The first input-output of the coordination microcontroller unit with a USB port is connected to the input-output of a serial USB port of a personal computer.

The disadvantages of this device include the lack of analog channels and the lack of self-diagnosis of the device.

As the nearest technical solution, a signal processing device for a technological installation is considered (see, for example, RU 71013 U1, published on 02.20.2008).

The specified device comprises a processor module, which includes respectively connected a microcontroller, an interface for input and output of digital signals, power supplies, an alphanumeric indicator and a control keyboard, as well as one input and / or output module of digital signals and input modules of analog signals, including the first and the second part, which are connected with the possibility of transmitting information and are electrically disconnected, for example, using an isolation device installed between them, while the first parts of the specified module st are connected to the interface of the processor module via a system bus, characterized in that the first parts of the analog signal input modules are connected to the system bus through an adapter located in the processor module, each of the inputs of which is connected via a separate serial bus to the output of the first part of the corresponding analog signal input module .

The disadvantages of this device include the lack of self-diagnosis.

Utility Model Summary

The proposed analog control module will allow to solve the problem of expanding the functionality by providing self-diagnosis of the module by automatically checking the operation of the main blocks of the module using the CAN interface controller included in the analog control module.

The technical result achieved by the proposed utility model is to expand the functionality of the module self-diagnosis and increase its reliability by automatically checking the operation of the main units of the analog control module and due to the presence of a CAN interface controller module configured to transmit the self-diagnosis results of the analog control module to the diagnostic remote control for visualization of self-diagnosis results.

The technical result is achieved due to the fact that the proposed utility model - analog control module contains:

a microprocessor configured to communicate through a buffer register and a data bus with an external processor module of a programmable controller,

input data register, connected via an internal data bus with a microprocessor and designed to receive signals from external controlled devices through series-connected first galvanic isolation unit, analog-to-digital converter and input signal protection and rationing unit,

an output data register connected via an internal data bus with a microprocessor and designed to transfer data to external monitored devices through a second galvanic isolation unit, a digital-to-analog converter, and a unit for monitoring and normalizing output signals, connected in series,

wherein the microprocessor is connected by an additional communication line with the input signal protection and rationing unit for monitoring the condition and diagnosing the breakdown of input communication lines from external monitored devices,

the microprocessor is connected by a second additional communication line with the control unit and regulation of output signals to monitor the status of the output lines of communication with external monitored devices for the diagnosis of short circuits in the lines and interruption of current signals,

the microprocessor is configured to test the blocks of the UIA module by supplying a test signal from the microprocessor in a closed circuit through the internal data bus, the output data register, the second galvanic isolation unit, a digital-to-analog converter, the output signal monitoring and regulation unit, the input signal protection and rationing unit, analog-to-digital converter, the first galvanic isolation unit, input data register, internal data bus to the microprocessor.

Preferably, the analog control module comprises a CAN interface connected via a CAN interface controller to a microprocessor and designed to transmit the results of the self-diagnosis of the module blocks to an external diagnostic console for subsequent indication of the diagnostic results.

Brief Description of the Drawing

The utility model is illustrated by a description of a preferred embodiment with reference to the accompanying drawing, which shows a block diagram of an analog control module.

Description of the preferred embodiment

Elements of a utility model and the relationships between them are shown in FIG.

The analog control module 1 (UIA) contains a microprocessor 2 connected through a buffer register 3 and a data transfer bus 4 to the processor module 5 of the programmable controller, from which it receives commands and data for transmission to external monitored devices 6.

The microprocessor 2 is connected via an internal data bus 7 to the input data register 8 and the output data register 9.

The input data register 8 receives information signals from external monitored devices 6 through the input signal protection and rationing unit 10, the analog-to-digital converter 11 and the first galvanic isolation unit 12.

The output data register 9 provides information signals to external monitored devices 6 through a second galvanic isolation unit 13, a digital-to-analog converter 14, and an output signal monitoring and regulation unit 15.

The microprocessor 2 is connected via line 16 and 16-1 with the block 10 of the protection and regulation of input signals. Line 16 transmits a control signal for setting the current value or potential difference for the input signal protection and rationing unit 10 and a control signal range for the input analog signals, and information about the state of the input line is transmitted, i.e. diagnosed breakage of the current signal transmission line by the absence of current in the specified line.

The microprocessor 2 is connected via lines 16 and 16-2 to the output line monitoring and regulation unit 15, through which the task of setting the current value or the potential difference and the range of output analog signals is controlled, and information on the status of the output lines connecting the output monitoring and control unit 15 is transmitted with external controlled devices 6, i.e. a line break is diagnosed along which current signals are transmitted and a short circuit is diagnosed in a line along which voltage signals are transmitted. Block 15 control and regulation of the output signals is connected with the block 10 of the protection and regulation of the input signals line 16-3 communication.

Self-diagnosis of the operation of the analog control module is performed by supplying a test signal from the microprocessor 2 in a closed loop through the internal data bus 7, the output data register 9, the second galvanic isolation unit 13, the digital-to-analog converter 14, the output signal monitoring and regulation unit 15, the protection unit 10 and normalization of input signals, analog-to-digital converter 11, first galvanic isolation unit 12, input data register 8, internal data transfer bus 7 to microprocessor 2.

By passing the test signal, the health of the blocks of module 1 is checked.

Diagnostics of the communication line of the analog control module 1 with the external processor module 5 via the data bus 4 is carried out as follows. The communication process is performed periodically with a given cycle time. In each communication cycle:

- the external module 5 of the processor transmits a message to the microprocessor 2,

- after receiving the message, the microprocessor 2 sends a response message to the external module 5 of the processor,

- if in the current cycle microprocessor 2 did not receive a message and this was repeated in the next cycle, the connection between module 1 with the external module 5 of the processor is lost.

The claimed analog control module 1 also contains a CAN 17 interface, which is designed to organize serial, highly reliable and inexpensive communication channels in distributed control systems. It allows you to organize both multiplex channels and high-speed networks. This interface has a protocol that supports the ability to locate several leading devices on the trunk and provides real-time data transfer.

The CAN 17 interface has high noise immunity due to error correction. Data transmission is carried out by frames, which are accepted by all network devices. The CAN interface identifier describes the contents of the data packet and is used to determine the priority when trying to transmit data simultaneously between multiple devices. The data transfer rate is selected based on the distance, the number of subscribers in the network and the capacity of the communication line. It is set according to the program and can range from a dozen Kbaud to one Mbaud.

The CAN interface standard defines data transfer regardless of the physical layer, i.e. The communication channel can be anything, for example, a radio channel or optical fiber. However, in practice, the CAN interface usually means a network with a physical communication channel in the form of a differential pair of wires.

After establishing the fact of loss of communication or the fact of a malfunction of the blocks of module 1, a diagnostic message is generated via the CAN 17 interface about this fact, a message is transmitted, for example, to an external diagnostic console 18 and is displayed on the display to the operator.

Diagnostics of the communication line via the CAN 17 interface is performed similarly to the diagnostics of the communication line of module 5 of the processor of the programmable controller. The only difference is that if there is no communication, a diagnostic message about the lack of communication via CAN 17 is transmitted to the processor module 5 via the data bus 4.

The microprocessor 2 through the CAN interface 17 and the CAN interface controller 19 can receive information about the status of external monitored and controlled devices 6 having a CAN interface (sensors, actuators), output the module self-diagnosis results to external devices having a CAN interface, for example, an external diagnostic console 18, and receive instructions for changing the operating mode.

The use of the industrial CAN 17 interface allows for reliable real-time data transmission for a wide class of devices - diagnostic consoles, industrial computers, input-output devices.

Industrial applicability

This technical solution can be widely used in industry, has advanced functionality, is made on a modern elemental base, has increased reliability and security.

Claims (9)

1. The analog control module (UIA), containing a microprocessor configured to communicate through a buffer register and a data bus with an external processor module of a programmable controller, input data register, connected via an internal data bus with a microprocessor and designed to receive signals from external controlled devices through series-connected first galvanic isolation unit, analog-to-digital converter and input signal protection and rationing unit, an output data register connected via an internal data bus with a microprocessor and designed to transfer data to external monitored devices through a second galvanic isolation unit, a digital-to-analog converter, and a unit for monitoring and normalizing output signals, connected in series, characterized in that the microprocessor is connected by an additional communication line to the input signal protection and rationing unit for monitoring the condition and diagnosing the breakdown of input communication lines from external monitored devices, the microprocessor is connected by a second additional communication line with the control unit and regulation of output signals to monitor the status of the output lines of communication with external monitored devices for the diagnosis of short circuits in the lines and interruption of current signals, the microprocessor is additionally configured to test the blocks of the UIA module by supplying a test signal from the microprocessor in a closed loop through the internal data bus, the output data register, the second galvanic isolation unit, a digital-to-analog converter, the output signal monitoring and regulation block, the input signal protection and rationing block , analog-to-digital converter, first galvanic isolation unit, input data register, internal data bus to microprocessor . 2. The module according to claim 1, characterized in that it contains a CAN interface connected via a CAN interface controller to a microprocessor and designed to transmit the results of the self-diagnosis of the blocks of the analog control module to an external diagnostic console to indicate the diagnostic results.

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