KR101121319B1 - Controller and method for transmitting and receiving data of that controller - Google Patents

Abstract

PURPOSE: A controller and a method for transmitting and receiving data thereof are provided to minimize power loss by the high-speed transmission and reception of data between stations. CONSTITUTION: A second station is installed in a second bus extension module. A first bus extension module converts first data into a first voltage signal and transmits the first voltage signal. The second bus extension module gets the first data by difference. The second bus extension module converts the second data into a second voltage signal and transmits the second voltage signal. The first bus extension module gets the second data by difference.

Description

Controller and Method for Transmitting and Receiving Data of That Controller}

The present invention relates to a controller, and more particularly to a controller of a nuclear power plant.

Various types of power plants include controllers to allow the power plants to run safely.

For example, the controller in charge of control of nuclear power plant controls the insertion of control rods and boric acid injection to safely shut down the reactor in the event of an accident in the nuclear power safety system, and controls the operation of the reactor's valves, pumps, and fans. It is responsible for personal safety.

Such a controller may be composed of a plurality of stations on which a plurality of modules performing various functions are mounted, as shown in FIG. 1. In this case, each station may be connected to each other through an expansion module included in each station.

As such, in the case of a nuclear power plant controller including a plurality of stations connected to each other through an expansion module, all modules mounted in the plurality of stations should be controlled by one processor module, and the processor module may have one scan time. Since data must be transmitted / received with all modules, the speed of data transmission and reception between stations is very important.

In the case of a general controller, data is transmitted and received between stations using a TTL (Transistor Transistor Logic) method of converting data into a voltage signal.

However, this TTL method has a problem that the amplitude of the voltage signal is relatively large, such as 3.3V to 5V, and is implemented as a single cable, so that the voltage signal may be changed during transmission and reception due to external influences.

Disclosure of Invention The present invention has been made in view of the above-described problems, and an object thereof is to provide a controller that is robust to external influences during data transmission and reception and a data transmission / reception method of the controller.

Another object of the present invention is to provide a controller capable of transmitting and receiving data at high speed when transmitting and receiving data between stations and a method of transmitting and receiving data of the controller.

In addition, another object of the present invention is to provide a controller capable of minimizing power loss during data transmission and reception between stations and a method for transmitting and receiving data of the controller.

Another object of the present invention is to provide a controller capable of efficiently using a cable connecting stations and a method of transmitting and receiving data of the controller.

A controller according to an aspect of the present invention for achieving the above object includes a first station equipped with a first bus expansion module; And a second station equipped with a second bus expansion module connected to the first bus expansion module via a cable, wherein the first bus expansion module converts first data into two different first voltage signals, When transmitting to a second bus expansion module, the second bus expansion module obtains the first data using a difference value between the two different first voltage signals, and the second bus expansion module obtains the second data from each other. The first bus expansion module obtains the second data by using a difference value between the two different second voltage signals when the second bus signal is converted into two different second voltage signals and transmitted to the first bus expansion module. It is done.

According to another aspect of the present invention, there is provided a data transmission / reception method of a controller, the method comprising: converting, by a first bus expansion module, first data received from a processor module into two different first voltage signals; Transmitting the two different first voltage signals to a second bus expansion module; Acquiring, by the second bus expansion module, the first data using a difference value between the two different first voltage signals; And transmitting the first data to a target module.

According to another aspect of the present invention, there is provided a method for transmitting and receiving data of a controller, the method including: converting, by a second bus expansion module, second data into two different second voltage signals; Transmitting the two different second voltage signals to a first bus expansion module; Acquiring, by the first bus expansion module, the second data using a difference value between the two different second voltage signals; And transmitting the second data to a processor module.

According to the present invention, since data is transmitted in the form of two voltage signals and data is restored by using difference values of two different voltage signals when receiving data, the data can be robust to external influences. .

In addition, since the amplitude of the voltage signal transmitted between stations is small, the present invention has an effect that data can be transmitted / received at high speed due to a fast transition.

In addition, the present invention reduces the current loop area as the data of the receiver receiving the voltage signal is returned again, thereby minimizing electromagnetic interference and minimizing spike current, thereby minimizing power loss during data transmission and reception between stations. The effect is that you can.

In addition, the present invention has the effect that it is possible to efficiently use the cable connecting the stations because the data can be transmitted in series.

1 is a view showing the configuration of a nuclear power plant controller according to an embodiment of the present invention.
FIG. 2 is a block diagram schematically illustrating a configuration of a bus expansion module included in each station in FIG. 1. FIG.
3 is a flowchart showing a data transmission / reception method of a controller according to a first embodiment of the present invention.
4 is a flowchart showing a data transmission / reception method of a controller according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view schematically showing the configuration of a controller according to an embodiment of the present invention. Hereinafter, for convenience of description, it is assumed that the controller according to the present invention is used for controlling a nuclear power plant. However, the present invention is not limited thereto and may be used for controlling various kinds of power plants.

As shown in Figure 1, the controller 100 according to an embodiment of the present invention includes a plurality of stations (110 ~ 110n).

The nuclear power plant controller 100 shown in FIG. 1 is a controller used to protect a nuclear reactor in a nuclear power plant. The nuclear power plant controller 100 satisfies the nuclear safety class standard (eg, Safety Class 1), and the reactor protection system RPS (Reactor Protection System), engineering It is a power generation facility that configures the safety system-based ESF-CCS (Engineered Safety Feature-Core Cooling System) and CPCS (Core Protection Calculator System).

Here, RPS refers to a system that continuously monitors safety-related parameters of a nuclear power plant and generates a nuclear reactor shutdown signal and an engineering safety equipment start signal when it falls outside a predetermined safe operation range.

In addition, ESF-CCS refers to a system that operates various engineering safety facilities for the purpose of mitigating the impact of accidents in the event of design criteria of a nuclear power plant.

CPCS refers to a system that monitors the state and nuclear reactivity of a nuclear reactor core and protects the reactor core from unstable conditions.

The nuclear power plant controller 100 according to the present invention may be configured with up to eight stations. In this case, each station (110a ~ 110n) is equipped with a plurality of modules, each station (110a ~ 110n) is connected by connecting the bus expansion modules (120a ~ 120n) with each other by a cable.

In addition, the first station 110, which is one of the plurality of stations 110a-110n, is equipped with a processor module 130 for integrally controlling various modules mounted in the plurality of stations 110a-110n. . Since a maximum of 16 modules may be mounted in one station, when the nuclear power plant controller 100 includes eight stations, the processor module 130 may control 127 modules.

Specifically, the processor module 130 not only executes an application program for operating the nuclear power controller 100, but also performs self-diagnosis, system configuration management, and monitoring and control of each module mounted in each station 110a to 110n. To perform.

In addition, the processor module 130 may perform task scheduling, inter-task communication, interrupt processing, online diagnosis, dead lock and live lock prevention, communication task execution, upload and download of the application, and security. -Perform authentication function.

In this case, when the plurality of stations 110a to 110n are connected to each other, the processor module 130 needs to exchange data with all the modules mounted in the plurality of stations 110a to 110n during one scan time. The speed of data transmission and reception between the stations 110a to 110n may be a very important problem.

In the case of the present invention, the data transmission process between each station (110a ~ 110n) for this purpose is converted into two different voltage signals and transmitted, and in the receiving process using the difference value of the two different voltage signals received By acquiring the received data, the data can be transmitted and received at high speeds between the stations 110a to 110n.

That is, when the processor module 130 of the first station 110a transmits the first data to the first bus expansion module 120a, the first bus expansion module 120a transmits the first data to two different voltage signals. Is converted to the second bus expansion module 120b of the second station 110b.

Also. The second bus expansion module 120b of the second station 110b converts the second data into two different voltage signals and transmits the first data to the first bus expansion module 110b of the first station 110a. The first data received from the station 110a is reconverted into two different voltage signals and transmitted to the third bus expansion module 120c of the third station 110c.

In an embodiment, the present invention may transmit and receive data using a Low Voltage Differential Signaling (LVDS) method in transmitting and receiving data between stations 110a through 110n.

In the case of the transmitter to implement the LVDS method, the current is configured to change only the direction of the current according to the data value while a constant current flows, and the receiver detects and amplifies the voltage difference applied to the termination resistor at the input of the receiver. It is.

Hereinafter, the configuration of the bus extension module included in each station that transmits and receives data using a voltage signal will be described.

2 is a diagram schematically illustrating a configuration of a bus extension module for transmitting and receiving data according to an embodiment of the present invention. In FIG. 2, for convenience of description, the nuclear power controller is described as consisting of three stations, but this is only one example and may be extended to seven stations as described above.

First, in the case of the first bus expansion module 120a mounted in the first station 110a, as shown in FIG. 2, the first bus expansion module 120a includes a first transmitter 200 and a first receiver 210.

The first transmitter 200 receives first data from the processor module 130 and converts the received first data into two different voltage signals.

In an exemplary embodiment, the first transmitter 200 may convert the first data into a low voltage signal having an amplitude of approximately 300 mV.

As described above, since the present invention converts the first data into a low voltage signal, data transition is fast and data can be transmitted at high speed.

Thereafter, the first transmitter 200 transmits two different voltage signals to the second bus expansion module 120b through two cables (not shown).

In this case, since the present invention transmits two different voltage signals using two cables, the data is not changed even if an external influence occurs.

In addition, in the conventional TTL method, in order to transmit a lot of data at a high speed, the cable had to be extended in parallel as much as possible, but in the present invention, since the data can be transmitted serially, the first bus expansion module 120a and the second bus are used. The cable connecting the expansion module 120b can be used efficiently.

In addition, in the present invention, the amount of electromagnetic interference or crosstalk can be minimized, and the power loss can be minimized because the amplitude of the voltage signal is small.

In one embodiment, the first transmitter 200 may be implemented using an LVDS chip.

Next, the first receiver 210 receives two different voltage signals for the second data from the second bus expansion module 120b and uses the second difference value of the received two different voltage signals. Acquire data.

In detail, the first receiver 210 indicates that the second data is 0 when the difference between two different voltage signals is less than or equal to the reference value, and the second data is 1 when the difference between the two different voltage signals exceeds the reference value. You can judge.

Thereafter, the first receiver 210 provides the obtained second data to the processor module 130.

In one embodiment, the first receiver 210 may also be implemented as an LVDS chip.

Next, in the case of the second bus expansion module 120b mounted to the second station 110b, as shown in FIG. 2, the second receiver 220, the determiner 230, and the third transmitter 240. , A second transmitter 250, and a third receiver 260.

First, the second receiver 220 receives two different voltage signals for the first data transmitted from the first transmitter 200 of the first bus expansion module 120a, and receives the two different voltage signals. The first data is obtained using the difference value of.

In detail, the second receiver 220 indicates that the first data is 0 when the difference between two different voltage signals is less than or equal to the reference value, and the first data is 1 when the difference between the two different voltage signals exceeds the reference value. You can judge.

Thereafter, the second receiver 220 provides the obtained first data to the determiner 230. In one embodiment, the second receiver 220 may also be implemented as an LVDS chip.

Next, the determination unit 230 determines a target module to which the first data is to be transmitted using the first data transmitted from the second receiver 220. In one embodiment, the determination unit 230 may determine the target module using the address of the target slot included in the first data.

As a result of determination, when the target module is a module mounted in the second station 110b, the determination unit 230 transmits the first data to the corresponding module.

As a result of determination, when the target module is a module not mounted in the second station 110b, the determination unit 230 transmits the first data to the third transmitter 240.

When the first data is transmitted from the determiner 240, the third transmitter 240 reconverts the first data into two different voltage signals, and uses the two cables to convert the two different voltage signals. To the fourth receiver 270 of the third bus expansion module 120c.

In one embodiment, the third transmitter 240 may also be implemented as an LVDS chip.

Next, the second transmitter 250 receives the second data from the predetermined modules included in the second station 110b, converts the second data into two different voltage signals, and uses two cables. To the first receiver 210 of the first bus expansion module 120a.

In this case, the predetermined module may include a module such as a communication module (not shown), an input module (not shown), or a special module such as a pulse count module (not shown).

In one embodiment, the second transmitter 250 may also be implemented as an LVDS chip.

In the above-described embodiment, although the second data is described as being transmitted from the modules included in the second station 110b, the second data is transmitted from the third station 110c through the third receiver 260. Can be

In detail, the third receiver 260 receives two different voltage signals from the fourth transmitter 280 of the third bus expansion module 120c and uses a difference value between the two different voltage signals to generate a second signal. By acquiring the data, the acquired second data may be provided to the second transmitter 250.

In this case, the third receiver 260 determines that the second data is 0 when the difference between two different voltage signals is less than or equal to the reference value, and the second data is 1 when the difference between the two different voltage signals exceeds the reference value. can do.

In one embodiment, the third receiver 260 may also be implemented as an LVDS chip.

In FIG. 2, the determination unit 230, the third transmitter 240, and the third receiver 260 are described as essential components. However, if only the second station 110b is connected to the first station 110a, the first data transferred from the first station 110a will be delivered to one of the modules mounted in the second station 110b, In this case, since the data transmitted to the first station 110a is provided from any one of the modules mounted in the second station 110b, the determination unit 230, the third transmitter 240, and the third station may be used. The receiver 260 may not be included.

Next, the component included in the third bus expansion module 120c mounted to the third station 110c performs the same function as the component included in the second bus expansion module 120b and thus, the third The description of the bus expansion module 120c will be omitted.

On the other hand, although not shown in Figure 1, each station (110a ~ 110n) is a power module, communication module, network module, input module, output module, pulse count module, TC (Thermocouple) module, RTD (Resistance Temperature Detector) module, It may further include a bus module.

The power module receives an external AC voltage and outputs a DC voltage for operating the modules mounted in each station 110a to 110n to the modules mounted in each station 110a to 110n. In one embodiment, the AC voltage input to the power module may be 85V ~ 264V, the DC voltage output from the power module may be 5V.

Next, the communication module transmits data transmitted from the processor module 130 to an external device, or transmits data transmitted from the external device to the processor module 130.

The communication module may verify the health of the data transmitted and received to verify the health of the communication during the data transmission and reception process.

The network module is connected to the N: N network modules of the plurality of different nuclear power controllers through the communication line, so that the controller can share the information data of each other.

The input module converts the data transmitted from the field device or the user into a data format that can be recognized by the processor module 130 and transmits the data to the processor module 130.

Such an input module may include an analog input module and a digital input module.

The analog input module converts the voltage input value, which is analog data transmitted from the device in the field, into digital data that can be recognized by the processor module 130 and provides the converted data to the processor module 130.

The digital input module converts the on / off contact state of the device in the field into digital data that can be recognized by the processor module 130 and provides the converted data to the processor module 130.

Next, the output module delivers the data transmitted from the processor module 130 to the field device, and includes an analog output module and a digital output module.

When the application program is executed by the processor module 130, the analog output module converts the digital result into an analog value and provides the analog output value to the device in the field.

When the application program is executed by the processor module 130, the digital output module converts the digital result value into a digital value in a form suitable for the device in the field and provides it to the device in the field.

The pulse count module accepts electrical pulse input signals to measure counts, sampling, and periods. The TC module is a temperature sensor module formed by joining two kinds of different metals and outputs a voltage proportional to the temperature difference between the hot junction and the cold junction.

The RTD module has an important temperature correlation coefficient for temperature measurement, measures the voltage drop by passing a low level of current, and provides an interface through sharing data, address, and control lines between the modules included in the bus module controller. Or share various grounds, and support the power supply passage.

Hereinafter, a method of transmitting and receiving data of a controller according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4.

3 is a flowchart showing a data transmission and reception method according to a first embodiment of the present invention. The data transmission and reception method according to the first embodiment shown in FIG. 3 illustrates a process in which data generated by the processor module 130 is transmitted to other stations 110b to 110n.

First, when the first bus expansion module 120a receives the first data from the processor module 130 (S300), the first bus expansion module 120a converts the received first data into two different voltage signals (S310).

In one embodiment, the first bus expansion module 120a may convert the first data into two different low voltage signals according to the LVDS method, and the amplitude of the low voltage signal may be approximately 300 mV.

Next, the first bus expansion module 120a transmits two different voltage signals for the first data to the second bus expansion module 120b using two cables (S320).

Next, the second bus expansion module 120b acquires first data using two different voltage signals transmitted from the first bus expansion module 120a (S330). In an embodiment, the second bus extension module 120b may obtain first data using a difference between two different voltage signals. Specifically, the second bus expansion module 120b determines that the first data is 0 when the difference between two different voltage signals is less than or equal to the reference value, and the first data is 0 when the difference between the two different voltage signals exceeds the reference value. The data may be determined as one.

Thereafter, the second bus expansion module 120b determines whether the first data is data to be transmitted to the second station 110b (S340). That is, the second bus expansion module 120b determines whether the target module to which the first data is to be transmitted is mounted in the second station 110b in which the second bus expansion module 120b is mounted.

In an embodiment, the second bus expansion module 120b may determine whether the target module is mounted in the second station 110b by using the address of the target slot included in the first data.

As a result of determination, when the target module is mounted in the second station 110b, the second bus expansion module 120b transmits the first data to the target module (S350).

On the other hand, when it is determined in S340 that the target module is not mounted in the second station 110b, the second bus expansion module 120b converts the first data into two different voltage signals again (S360). The two different voltage signals are transmitted to the third bus expansion module 120c using two cables.

Subsequently, although not shown, the third bus expansion module 120c also performs the same function as the second bus expansion module 120b.

4 is a flowchart illustrating a data transmission / reception method according to a second embodiment of the present invention. The data transmission and reception method according to the second embodiment shown in FIG. 4 illustrates a process in which data from other stations 110b to 110n is transmitted to the processor module 130.

First, as shown in FIG. 4, the second bus expansion module 120b converts the second data into two different voltage signals (S400). In this case, the second data may be transmitted from predetermined modules included in the second bus expansion module 120b.

In an embodiment, the second bus expansion module 120b may convert the second data into two different low voltage signals according to the LVDS method, and the amplitude of the low voltage signal may be approximately 300 mV.

Next, two different voltage signals for the second data are transmitted to the first bus expansion module 120a using two cables (S410).

Thereafter, the first bus expansion module 120a obtains the second data by using two different voltage signals with respect to the second data (S420). Specifically, the first bus expansion module 120a determines that the second data is 0 when the difference between two different voltage signals is equal to or less than the reference value, and the second data when the difference between the two different voltage signals exceeds the reference value. The data may be determined as one.

Thereafter, the first bus expansion module 120a transmits the second data to the processor module 130 using the internal bus (S430).

In the above-described embodiment, it has been described that the second data is received from a predetermined module included in the second bus expansion module 120b. However, in the modified embodiment, the second data may be transmitted from the third station 110c in which the third bus expansion module 120c is mounted.

According to this embodiment, before performing the S400, a process of receiving two different voltage signals for the second data from the third bus expansion module 120c, and using the two different voltage signals The process of acquiring the data may be further included.

Those skilled in the art to which the present invention pertains will understand that the above-described present invention can be implemented in other specific forms without changing the technical spirit or essential features.

Therefore, it is to be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

100: nuclear power controller 110a ~ 110n: station
120a to 120n: bus expansion module 130: processor module

Claims (17)

A first station equipped with a first bus expansion module; And
A second station equipped with a second bus expansion module connected to the first bus expansion module via a cable;
When the first bus expansion module converts first data into two different first voltage signals and transmits the first data signal to the second bus expansion module, the second bus expansion module generates a difference value between the two different first voltage signals. Acquires the first data by using the second bus expansion module, converts the second data into two different second voltage signals, and transmits the second data signal to the first bus expansion module. And acquiring the second data using a difference value between two different second voltage signals. The method of claim 1,
The first bus expansion module receives the first data from a processor module,
And the processor module controls modules mounted to the first station and mounted to the first and second stations. The method of claim 1,
And the second bus expansion module transmits the first data obtained by using a difference between two different first voltage signals to a target module. The method of claim 3,
And the information about the target module is obtained from an address of a target slot included in the first data. The method of claim 1,
And the plurality of second stations is connected to each other using two cables through the second bus expansion module mounted to each of the second stations. The method of claim 1, wherein the first bus expansion module,
A first transmitter configured to receive the first data from a processor module, convert the first data into two different first voltage signals, and provide the first data signal to the second bus expansion module; And
Receiving the two different second voltage signal for the second data from the second bus expansion module, by using the difference value of the two different second voltage signal to obtain the second data by the processor module And a first receiver for transmitting to the controller. The method of claim 1, wherein the second bus expansion module,
Receiving the two different first voltage signals with respect to the first data transmitted from the first bus expansion module, and obtaining the first data using a difference value between the two different first voltage signals. 2 receivers;
A determination unit which determines whether a target module to which the first data is to be transmitted is mounted in the second station, and if so, transmits the first data to the target module; And
And a second transmitter configured to receive second data from a predetermined module, convert the second data into two different second voltage signals, and transmit the second data signal to the first bus expansion module. The method of claim 7, wherein
The controller further comprises a third station comprising a third bus expansion module connected with the second bus expansion module via two cables, wherein the second bus expansion module comprises:
A third transmitter for converting the first data into two different third voltage signals and transmitting the first data to the third bus expansion module through the two cables when the target module is not mounted in the second station; And
Receiving two different fourth voltage signals from the third bus expansion module, acquiring the second data by using the difference value of the two different fourth voltage signals, and obtaining the acquired second data. And a third receiver to provide the two transmitters. The method of claim 7, wherein
And said predetermined module is a module mounted in the same station as said second bus expansion module. The method of claim 1,
The first and second bus expansion modules, when transmitting and receiving the first and second data, characterized in that for transmitting and receiving using a low voltage differential signaling (LVDS) method. Converting, by the first bus expansion module, first data received from the processor module into two different first voltage signals;
Transmitting the two different first voltage signals to a second bus expansion module;
Acquiring, by the second bus expansion module, the first data using a difference value between the two different first voltage signals; And
And transmitting the first data to a target module. The method of claim 11,
And the second bus expansion module determines the target module using a target slot address included in the first data. The method of claim 11, wherein prior to the step of transmitting the first data to a target module,
Determining whether the target module is mounted at the same station as the second bus expansion module,
The first data transmission method of the controller, characterized in that for transmitting the first data to the target module. The method of claim 13,
If the target module is not mounted in the same station as the second bus expansion module,
Converting, by the second bus expansion module, the first data into two different third voltage signals; And
And transmitting the two different third voltage signals to a second bus expansion module of another station connected to the second bus expansion module. Converting, by the second bus expansion module, the second data into two different second voltage signals;
Transmitting the two different second voltage signals to a first bus expansion module;
Acquiring, by the first bus expansion module, the second data using a difference value between the two different second voltage signals; And
And transmitting the second data to a processor module. 16. The method of claim 15,
And the second data is received from another module mounted to a station equipped with the second bus expansion module. 16. The method of claim 15,
And the second data is obtained using a difference value between two different fourth voltage signals received from a station equipped with the second bus expansion module and another station.

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