RU102402U1 - COMMUNICATION GSM / GPRS CONTROLLER - Google Patents

Abstract

 1. Communication GSM / GPRS controller, made in the form of a housing in which a printed circuit board is installed with a programmable microcontroller located on it, which receives information from digital inputs and the RS-232 port and transmits received information via Ethernet, as well as non-volatile memory, moreover the case is equipped with fastening means for a vertical and horizontal supporting surface and is equipped with a network cable socket for connecting to a 10/100 Base-Tx switch with PoE technology support, as well as a detachable contact block, including contacts for connecting external devices to the four inputs / outputs of universal programmable digital channels, contacts for connecting the power wires and the control circuit of the actuator, contacts for connecting the serial port of the connected device to the controller, as well as contacts for connecting to optically isolated relay outputs with current up to 2.5 A and voltages up to 60 V, equipped with control buttons and a connector for connecting an external 12-36 V DC power supply, designed started for use if the connected switch does not support PoE technology, characterized in that it is equipped with a converter of I2C interface signals into 1 Wire interface signals, a connector for connecting external sensors with a 1 Wire interface, a GSM / GPRS radio modem with an antenna and an interface for SIM CARD , infrared port, galvanically isolated RS-485 and CAN-bus interfaces, detachable contact block for connecting external devices to four additional inputs / outputs of universal programmable digital channels, astra

Description

The claimed technical solution (controller) relates to devices with programmed control, namely to programmable controllers and can be used in devices for collecting, processing and transmitting information in technical systems.

A controller is known from the prior art comprising a printed circuit board with a microprocessor, a power supply, read-only memory, a time control device and an actuating relay control circuit, as well as communication lines connected to the microprocessor I / O channels, control and signaling lines, a matching circuit, and protection of communication lines, the external battery charge control circuit, while the microprocessor is connected to the external battery charge control circuit. (Patent RU 41167 U1, July 8, 2004, published October 10, 2004).

A disadvantage of the known controller is the lack of I ² C and 1Wire interfaces for connecting external temperature, humidity and smoke sensors, which narrows the scope of the controller in smart home systems, the absence of RS-485, CAN interfaces and a GSM / GPRS radio modem limits it application in distributed information collection systems, and the absence of a programming unit with an integrated programming environment in the IEC 61131-3 standard languages slows down the process of developing user programs and complicates the transfer of programs to other controllers in its class.

A known controller containing a printed circuit board on which there is a microcontroller that collects information from pulse channels and transfers via RS-232 interfaces, which is used to connect to a computer, RS-485 and CAN, providing remote connection to the object, a lithium cell, non-volatile memory , telecontrol channel, real-time clock, power supply, additional printed circuit board with clamps for connecting pulse channels, real-time clock with integrated non-volatile memory, a CAN the controller is made by a separate chip. (Patent RU 61900 U1, October 23, 2006, published March 10, 2007).

A disadvantage of the known controller is the lack of I ² C and 1Wire interfaces for connecting external temperature, humidity and smoke sensors, which narrows the scope of the controller, and the absence of a programming unit with an integrated programming environment in languages from the IEC 61131-3 standard slows down the program development process user and complicates the transfer of programs to other controllers of this class.

A known controller comprising a housing with a cross-board, which is a unifying node, a secondary power source module, a system module containing the computing core of the system, as well as an Ethernet interface, a set of 4 additional input modules necessary to implement the tasks of collecting data from primary energy meters , an operator interface unit, including a printed circuit board with a liquid crystal display, a keyboard, an infrared port, an SD-card interface for connecting flash cards, a piezo ceramic emitter and bracket for installing connectors on it for connecting external circuits and interfaces, the switching of which with the cross-board is made by a flat cable. (Patent RU 63560 U1, December 20, 2006, published May 27, 2007).

A disadvantage of the known controller is the lack of I ² C and 1Wire interfaces for connecting external temperature, humidity and smoke sensors, which narrows the scope of the controller in smart home systems, the absence of RS-485, CAN interfaces and a GSM / GPRS radio modem limits it application in distributed information collection systems, and the absence of a programming unit with an integrated programming environment in the IEC 61131-3 standard languages slows down the process of developing user programs and complicates the transfer of programs to other controllers in its class.

Closest to the claimed technical solution is the controller, made in the form of a housing with a terminal panel, in which a printed circuit board with a microcontroller located on it is installed, which receives information from digital inputs and the RS-232 port, and transfers the received information via the Ethernet interface, as well as non-volatile memory, and the case is equipped with means of attachment to a horizontal or vertical supporting surface and is equipped with a network cable socket for connection to a 10 / 100Base-Tx switch with PoE support (front and power via Ethernet), as well as a detachable terminal block of contacts, including contacts for connecting external devices to four inputs / outputs of universal programmable digital channels, contacts for connecting power wires and an actuator control circuit, contacts for connecting a serial port of a connected device to the controller as well as contacts for connecting to optically isolated relay outputs with current magnitudes up to 2.5 A and voltages up to 60 V. The controller is equipped with control buttons and a socket for connecting an external 12-36 V DC power supply, intended for use if the connected switch does not support PoE technology, a network cable socket for connecting to a 10/100 Base-Tx switch with PoE support. (Patent RU 2348966 C1, 02.21.2008, published 03/10/2009) (prototype).

A disadvantage of the known controller is the lack of I ² C and 1Wire interfaces for connecting external temperature, humidity and smoke sensors, which narrows the scope of the controller in smart home systems, the lack of RS-485, CAN interfaces and a GSM / GPRS radio modem its use in distributed information collection systems, and the lack of a programming unit with an integrated programming environment in IEC 61131-3 standard languages slows down the process of developing user programs and complicates the transfer of programs mm on other controllers in its class.

The task to which the claimed device is directed is to expand the functionality of the controller and expand the arsenal of technical means in this technical field.

The solution to this problem is achieved due to the fact that the well-known controller additionally has: an I ² C interface signal converter into 1Wire interface signals with a connector for connecting an external sensor having a 1Wire interface, a GSM / GPRS radio modem with an antenna and an interface for SIM CARD, an infrared port , RS-485 interface, CAN interface, controller protection circuit against incorrect polarity of the supply voltage, a removable programming unit containing a processor, an indication unit with a keyboard, a memory device with a dustanovlennoy integrated development environment applications KRUGOL ™ company "CIRCLE" implementing programming languages of IEC 61131-3, the programming unit is connected to the controller via the Ethernet interface.

The technical result provided by the given set of features is the expansion of the functions performed by the controller by introducing the ability to connect temperature, humidity, smoke sensors to it via the 1Wire interface, the ability to remotely transfer the readings of substance and energy meters through the GSM / GPRS radio modem to commercial metering centers. The presence of RS-485, CAN interfaces and a GSM / GPRS radio modem expands the possibility of using the controller in geographically distributed control systems, the protection circuit of the controller from incorrect polarity of the supply voltage increases its reliability, and the programming unit with the integrated application development environment KRUGOL ™ accelerates the development of user programs and improves the reliability of application software.

Figure 1 shows a block diagram of a GSM / GPRS communication controller, and figure 2 shows a General view of the device without a programming unit.

“GSM / GPRS communication controller” contains: housing base 1, printed circuit board 2, input / output channel 3 connector, programmable microcontroller 4, microcontroller status indicator “INIT” 5, controller operation mode indicator “STATUS” 6, “RESET” button »7, interface RS-232 8, interface RS-232/485 9, interface RS-232 / CAN-bus 10, network interface Ethernet 11, interface USB 12, non-volatile memory NANDFLASH 13, random access memory SDRAM 14, random access memory SRAM with of battery 15, the power supply connector 16, the transmitter interface signals in the I ² C Sig interface 1Wire 17, connector for connecting external sensors with 1Wire 18 interface, GSM / GPRS radio modem with interface for SIM CARD 19, IrDA 20 infrared, astronomical calendar timer RTC 21, battery power for timer calendar RTC 22, protection against incorrect polarity of supply voltage 23, hardware WatchDog 24, DC / DC power converter 25, screws securing the board to the base of the case 26, programming unit 27, display unit 28, keyboard unit 29, Ethernet cable 30, controller mounting device DIN rail 31 k the cradle of the housing 32.

The controller software (software) consists of four components:

- bootloader

- The loader of the operating system;

- Operating system (OS) Linux;

- Application software.

Bootloader

The bootloader is used for initial recording of software in the production of the controller. The bootloader binary code is loaded into the internal memory of the microcontroller via the built-in USB-slave port (provided by the BOOT ROM of the microcontroller) and control is transferred to it. The bootloader should ensure that binary files of the operating system loader and Linux OS files are written to NandFlash memory using one of the microcontroller interfaces.

Bootloader

UBoot or RedBoot is used as the OS Loader. When the controller starts, control is transferred to the executable code of the loader of the operating system.

Linux OS

All Linux system and related files are located on the NandFlash system partition of the controller’s memory, which is the root (directory '/'). The root file system works by default in read-only mode, which increases the resiliency of the OS. The root system contains an empty / gsw directory into which the application software will be written. The operating system is based on the Linux kernel v.2.6.x of the latest stable version at the time of the creation of the system partition image. The kernel includes drivers to support the entire hardware of the controller. The functionality of the Linux OS is sufficient for the application code execution environment. According to the system startup scenario, all controller interfaces are initialized, based on user settings, which are located in the application software section. If there are no user settings, the default settings are used. At the end of the OS initialization, control is transferred to the script with a predefined name located in the application software section.

Application software

The application software is located in the application section of flash memory, which contains a script with a predefined name that contains the application software start procedure, a file for configuring Linux OS parameters. The directory structure and the set of files are formed at the discretion of the manufacturer of the application software.

Description of the controller

Before starting work, connect connector 11 on the GSM / GPRS communication board of the controller with an Ethernet 30 cable, and connect 24 V DC power supply to connector 16. Two-color LED indicator “INIT” 5 displays the current status of the controller:

- “off” - the controller is de-energized;

- “red” - controller power is on;

- “green” - a successful start of the bootloader of the operating system (OS).

Functionally, the controller can operate in one of three modes: "START", "WORK", "PROGRAMMING". The current operating mode of the controller is indicated by the “STATUS” indicator 6.

After applying the supply voltage, the controller goes into the "START" mode, the status of the "RESET" button 7 is read to determine the further mode of operation of the controller. If the button has been pressed for 2-3 seconds, the “STATUS” indicator lights up in red, while the internal bootloader variable is set to state 1, then the system software starts, and file systems are checked and restored, if necessary. All input / output interfaces are inactive in this mode, and discrete outputs are turned off. Then the controller goes into the “OPERATION” mode, if the pressing of the “RESET” button has not been recorded. The “OPERATION” mode is the main one for the controller and is indicated by the green color of the “STATUS” indicator. In this mode, the controller executes the user program. All interfaces, analog and digital inputs / outputs of the controller are used in accordance with the user program.

If the RESET button was pressed in the "START" mode, the controller switches to the "PROGRAM" mode, which is intended to configure the controller and load the user program into it, while all interfaces except Ethernet 11 are inactive, the user program is not executed, the indicator “STATUS” glows with a pulsating red glow. In this mode, the controller software and hardware supports a programming unit 27, which contains a display unit 28 with a keyboard 29 and a storage device with a pre-installed integrated Krugol ™ application development environment from KRUG, which implements programming languages from the IEC 61131-3 standard. The programming unit is connected to the controller via the Ethernet interface 11. Indication unit 28 has the ability to graphically display interface objects of the KRUGOL ™ integrated development environment, which allows the user to select the preferred programming language from among the languages of IEC 61131-3 standard and program the control algorithm in the selected language using the keyboard 29, debug the program in real time and write it to the controller memory. Next, the controller is restarted by pressing the “RESET” button and through the “START” mode it switches to the “OPERATION” mode, moreover, the programmed controller can execute the user program, both when the programming unit 27 is connected and without it. The supply voltage of 24 V DC is converted by a DC / DC converter 25 to 5 V and 3.3 V DC to power all nodes of the controller. The IrDA 20 infrared port allows you to contactlessly take measurement data from the controller to a portable laptop computer. The WatchDog 24 watchdog timer removes the controller from uncontrolled states by automatically restarting it in case of failures under conditions of strong electromagnetic interference. The protection unit 23 prevents damage to the controller if the polarity of the 24 V supply voltage is not observed.

“GSM / GPRS communication controller” is practically implemented using the components shown in the table.

Table The position number in figures 1 and 2 Type of Qty per product 1, 32 Base and cover 65 05 112 to DIN rail one 2 Printed circuit board Fiberglass laminate FR-4 one 3 I / O Channel Connector 15EDGRC-3.81-16 one four Microcontroller AT91SAM9G20 one 5, 6 Led indicator Two-color, d = 3 mm 2 7 RESET button TS_A2PS_130, h = 5 mm one 8 RS-232 interface MAX3243ECOBR one 9 RS-232/485 interface SN75176BD one 10 Interface RS-232 / CAN SN65HVD251D one eleven Ethernet network interface Micrel KS28721CL one 12 USB interface Type B (USB slave); one 13 NANDFLASH memory Samsung K9F1G08UOB one fourteen SDRAM Samsung K4S561632J 2 fifteen SRAM Samsung K6X8016T3V one 16 24 V power input 15EDGRC-3.5-03. one 17 I ² C to 1Wire Converter DS2482S-100 one eighteen 1Wire Connector Rj11 one 19 GSM / GPRS Radio Modem SIM300DZ Hilo (Sagem) one twenty Infrared IrDA TFDS4500 one 21 RTC Timer Calendar DS1338Z-33 one 22 RTC Timer Battery CR2032 one 23 24V power protection diode Schottky Diode 10MQ040N one 24 Watchdog WatchDog ADM6822SYRJ one 25 DC / DC power converter TRACO TEN3 2411 one 26 Board Mount Screws 3 × 10 mm 2 27 Programming unit ASUS A2500L one

Claims (5)

1. Communication GSM / GPRS controller, made in the form of a housing in which a printed circuit board is installed with a programmable microcontroller located on it, which receives information from digital inputs and the RS-232 port and transmits received information via an Ethernet interface, as well as non-volatile memory, moreover the case is equipped with fastening means for a vertical and horizontal supporting surface and is equipped with a network cable socket for connecting to a 10/100 Base-Tx switch with PoE technology support, as well as a detachable contact block, including contacts for connecting external devices to the four inputs / outputs of universal programmable digital channels, contacts for connecting the power wires and the control circuit of the actuator, contacts for connecting the serial port of the connected device to the controller, as well as contacts for connecting to optically isolated relay outputs with current up to 2.5 A and voltages up to 60 V, equipped with control buttons and a connector for connecting an external 12-36 V DC power supply, designed started for use if the plug-in switch does not support PoE technology, characterized in that it is equipped with a converter of I ² C interface signals to 1 Wire interface signals, a connector for connecting external sensors having a 1 Wire interface, a GSM / GPRS radio modem with an antenna and an interface for SIM CARD, infrared, galvanically isolated RS-485 and CAN-bus interfaces, detachable contact block for connecting external devices to four additional inputs / outputs of universal programmable digital channels, astra onomic timer-calendar with redundant battery power, protection circuit against reverse polarity of the supply voltage, hardware WatchDog watchdog timer, operating mode indicator, removable programming unit. 2. The controller according to claim 1, characterized in that the memory of the microcontroller is capable of storing system software, including the application code execution environment (real-time operating system) and at least one control algorithm. 3. The controller according to claim 1, characterized in that the programming unit comprises a processor, an indication unit with a keyboard, a storage device with a pre-installed integrated application development environment KRUGOL ™ from KRUG, which implements programming languages from IEC 61131-3. 4. The controller according to claim 1, characterized in that the programming unit is connected to the controller via an Ethernet interface, and the programmed controller can execute the user program, both when the programming unit is connected and without it. 5. The controller according to claim 3, characterized in that the display unit with a keyboard has the ability to graphically display interface objects of the KRUGOL ™ integrated development environment.