RU211983U1 - Multi-purpose programmable logic controller "BAGET-PLK1" - Google Patents

Abstract

The utility model relates to computer technology, namely to programmable logic controllers (PLCs), and can be used to build automated control systems for critical infrastructure of medium complexity in the fuel and energy complex, oil and gas industry and other industries. The technical result of using the patented utility model is to increase functional safety by providing effective protection of the PLC from freezing using watchdog timers, from possible failures using self-diagnosis, including periodic testing of RAM and ROM, monitoring of short circuits and overheating, and increasing the level of trust PLC through the use of domestic software. PLC "Baget-PLK1" contains a processor module, including a domestic microprocessor with low power consumption 1890VM108, expansion modules, including a specialized domestic microcontroller, a digital signal input module, a 220 V discrete signal input module, a digital signal output module, a 220 V discrete signal output module, DC voltage analog signal measurement module, DC voltage analog signal measurement module, DC voltage analog signal generation module, DC voltage analog signal generation module, thermocouple signal measurement module, RTD signal measurement module, RS485 communication module, RS232 communication module, power supply module; bus terminations. 1 ill.

Description

The utility model relates to computer technology, namely to programmable logic controllers (PLCs), and can be used to build automated control systems for critical infrastructure of medium complexity in the fuel and energy complex, oil and gas industry and other industries.

PLCs are usually modular systems and consist of a processor module and modules for input/output of external signals and interfaces. The processor module controls the entire logic of the PLC and includes a processor and memory. I/O modules are connected to field equipment (sensors and actuators) and provide an interface between the processor module and external inputs/outputs (see TOPAZ PLC manufactured by PLC Technology LLC, https://tpz.ru/production/).

The closest analogue is RealLab PLC! produced by NIL AP LLC (https://www.reallab.ru/catalog/modular-plc/). This PLC has a modular architecture and consists of a central processor module and standard expansion kits: analog and discrete signal input/output modules, a power supply and interface converters that are connected to the processor module using an industrial network based on the RS-485 interface and the Modbus protocol.

The disadvantages of this device are insufficient functional safety for use in critical infrastructure due to the lack of: effective protection of the PLC from freezing, from possible failures, short circuits and overheating, as well as an insufficient level of trust due to the use of predominantly foreign electronic components and operating systems in devices (Windows or Linux), which may contain unexpected bookmarks.

The technical result of using the patented utility model is to increase functional safety by providing effective protection of the PLC from freezing using watchdog timers, from possible failures using self-diagnosis, including periodic testing of RAM and ROM, monitoring of short circuits and overheating, and increasing the level of trust PLC through the use of domestic software.

The specified technical result is achieved by a multi-purpose programmable logic controller "BAGET-PLK1", containing a processor module and expansion modules, which, unlike the prototype, contains a processor module as a processor module, including an 1890VM108 microprocessor associated with a random access memory (RAM) with a user constant a memory device (ROM), with a built-in real-time clock, with a programmable read-only memory (PROM) of the NAND type, with a receiver of time reference signals from GPS / GLONASS satellite navigation systems with an external active antenna and with technological and external communication interfaces, using for interaction with expansion modules RS-485 interface, and as expansion modules it contains:

- a digital signal input module, including a K5500VK018 microcontroller and having a digital signal input interface and an RS-485 interface for intermodule interaction;

- a digital signal output module, including a K5500VK018 microcontroller and having a digital signal output interface and an RS-485 interface for intermodule interaction;

- a module for measuring analog DC signals, including a K5500VK018 microcontroller and having an analog current signal input interface and an RS-485 interface for intermodule interaction;

- a module for measuring DC voltage analog signals, containing a K5500VK018 microcontroller and having an analog voltage signal input interface and an RS-485 interface for intermodule interaction;

- a module for generating analog DC signals, containing a K5500VK018 microcontroller and having an analog current signal output interface and an RS-485 interface for intermodule interaction;

- a module for generating analog DC voltage signals, containing a K5500VK018 microcontroller and having an analog voltage signal output interface and an RS-485 interface for intermodule interaction;

- a thermocouple signal measurement module containing a K5500VK018 microcontroller and having an interface for connecting thermocouples and an RS-485 interface for intermodule interaction;

- a module for measuring thermistor signals, including a K5500VK018 microcontroller and having an interface for connecting resistance thermometers and an RS-485 interface for intermodule interaction;

- a 220 V discrete signal input module, including a K5500VK018 microcontroller and having a 220 V discrete signal input interface and an RS-485 interface for intermodule interaction;

- a 220 V discrete signal output module containing a K5500VK018 microcontroller and having a 220 V discrete signal output interface and an RS-485 interface for intermodule interaction;

- communication module RS485, including a K5500VK018 microcontroller and having 4 isolated RS-485 channels for connecting external subscribers and an RS-485 interface for inter-module interaction;

- communication module RS232, including a K5500VK018 microcontroller and having 4 isolated RS-232 channels for connecting external subscribers and an RS-485 interface for inter-module interaction;

- a power supply module containing a K5500VK018 microcontroller, which has an RS-485 interface for intermodule interaction, and provides power supply to the internal consumers of the controller with a stabilized voltage of 24 V with the implementation of hot swap, hot and cold backup functions;

- bus terminations.

Due to the use in the modules of highly reliable domestic microprocessor with low power consumption 1890 BM108 (certificate No. 2018630007 dated January 11, 2018) and a specialized microcontroller K5500VK018 (certificate No. 2021630048 dated April 27, 2021) with the KOMDIV 64 architecture using the specified expansion modules, the specified technical result is achieved, namely, increasing the functional security and the level of trust of the PLC.

PLC "BAGET-PLK1" is designed to build systems with an open architecture, configured by users in accordance with the requirements of specific tasks performed.

The essence of the utility model is illustrated in Fig. 1, which shows an example of an implementation of a block diagram of a PLC assembly.

The composition of the PLC "BAGET-PLK1", shown in Fig. 1, includes modules in the following design, designated by Arabic numerals:

1 - processor module (design marking of the developer BT75-201), including microprocessor 1890 VM108, DDR3 RAM with a capacity of at least 256 MB, user ROM with a capacity of at least 16 MB, NAND ROM with a capacity of at least 256 MB, a built-in real-time clock and having the following external communication interfaces: 2 channels of Ethernet 10/100 Base-TX interface, 3 channels of RS-485 interface for connecting external subscribers, 2 channels of RS-485 interface for connecting the module to a common internal bus, RS232 process interface, USB 2.0 process interface, signal receiver time readings from GPS/GLONASS satellite navigation systems with an external active antenna; expansion modules;

2 - digital signal input module (BT75-401), including a K5500VK018 microcontroller and having 16 isolated digital signal input channels and an RS-485 interface for intermodule interaction;

3 - digital signal output module (BT75-402), including a K5500VK018 microcontroller and having 16 isolated digital signal output channels and an RS-485 interface for intermodule interaction;

4 - a module for measuring analog signals of direct current (BT75-403), including a K5500VK018 microcontroller and having 16 isolated channels for inputting analog current signals and an RS-485 interface for intermodule interaction;

5 - module for measuring DC voltage analog signals (BT75-403A), containing a K5500VK018 microcontroller and having 16 isolated channels for inputting analog voltage signals and an RS-485 interface for intermodule interaction;

6 - module for generating analog signals of direct current (BT75-404), containing a K5500VK018 microcontroller and having 4 isolated channels for outputting analog current signals and an RS-485 interface for intermodule interaction;

7 - module for generating analog DC voltage signals (BT75-404A), including a K5500VK018 microcontroller and having 4 isolated channels for outputting analog voltage signals and an RS-485 interface for intermodule interaction;

8 - module for measuring thermocouple signals (BT75-405), containing a K5500VK018 microcontroller and having 16 isolated channels for connecting thermocouples and an RS-485 interface for intermodule interaction;

9 - module for measuring thermal resistance signals (BT75-405A), including a K5500VK018 microcontroller and having 2 isolated channels for connecting resistance thermometers and an RS-485 interface for intermodule interaction;

10 - module for input of discrete signals 220 V (BT75-406), including the microcontroller K5500VK018 and having 6 isolated channels for input of discrete signals 220 V and RS-485 interface for intermodule interaction;

11 - 220 V discrete signal output module (BT75-407), containing a K5500VK018 microcontroller and having 6 isolated 220 V discrete signal output channels and an RS-485 interface for intermodule interaction;

12 - RS485 communication module (BT75-251), including the K5500VK018 microcontroller and having 4 isolated RS-485 channels for connecting external subscribers and an RS-485 interface for inter-module interaction;

13 - RS232 communication module (BT75-251A), including the K5500VK018 microcontroller and having 4 isolated RS-232 channels for connecting external subscribers and an RS-485 interface for inter-module interaction;

14 - power supply module (BT75-001), containing the K5500VK018 microcontroller, which has an RS-485 interface for intermodule interaction, and provides power supply to the internal consumers of the controller with a stabilized voltage of 24 V with the implementation of hot swap, hot and cold backup functions;

15 - RS485 information interface bus and power supply, consisting of bus connectors included in the modules;

16 - bus contact, installed on the right;

17 - bus contact, mounted on the left.

The domestic highly stable real-time operating system (RT OS) BAGET is used as the general software of the PLC "BAGET-PLK1".

PLC "BAGET-PLK1" provides the following functions:

- direct measurements of input electrical signals (current, voltage, temperature);

- input of information from sensors of input digital signals;

- control of executive mechanisms, control of their condition;

- implementation of program-logical control, reception/transmission of the timestamp.

When building an automated control system based on PLC modules "BAGET-PLK1" using one system bus, it is allowed to use no more than 32 modules. In this case, the set of I/O interfaces depends on the module configuration used.

For the organization of fault-tolerant control systems in the PLC, the following redundancy methods are provided:

- redundancy of processor modules;

- redundancy of the configured PLC as a whole (mirroring);

- redundancy of communication channels.

When implementing hot redundancy in the PLC "BAGET-PLK1", two BT75-201 processor modules and at least two BT75-001 power supply modules are used.

To prevent equipment downtime when replacing a failed module, the BAGET-PLK1 PLC implements hot swapping of modules.

PLC "BAGET-PLK1" and the basic software for it can be produced on the territory of the Russian Federation for a long period of time: at least 20 years. The necessary upgrades of the basic software and PLC hardware can be performed by domestic specialists using promising Russian microprocessors and real-time operating systems.

Claims (1)

A multi-purpose programmable logic controller containing a processor module and associated expansion modules, characterized in that, as a processor module, it contains a processor module that includes a 1890VM108 microprocessor, random access memory (RAM), user read only memory (ROM), built-in real-time clock time, a programmable read-only memory (PROM) of the NAND type, a receiver of time reference signals from GPS / GLONASS satellite navigation systems with an external active antenna and with technological and external communication interfaces, using the RS-485 interface to interact with expansion modules, and expansion modules in contain the K5500VK018 microcontroller as a control controller.

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