KR20090046463A - A device for testing input output module of distribution control system - Google Patents

Abstract

The present invention relates to a distributed control system input and output module test apparatus, comprising: a power supply unit (10) for supplying power to the apparatus; A test interface unit 20 connected to the power supply unit 10 to interface with a test adapter and a digital output unit; A test adapter 30 connected to the test interface unit 20 to connect a relay unit; A digital output unit 40 connected to the test interface unit 20 to process input and output signals; A controller 50 connected to the digital output unit 40 to control and output an input signal; A touch screen 60 connected to the controller 50 to display and input information under the control of the controller 50; A relay unit 70 connected to the test adapter 30 to test whether there is a defect; The digital input / output module and the relay used in the distributed control system of the power plant are composed of a computer 80 connected to the test interface unit 20 and determining whether the relay unit 70 is defective and outputting the determination result. There is a special advantage that can be tested quickly and easily to determine the normality and failure point.

Distributed control system, input / output module, relay, test device, interface unit.

Description

A device for testing input output module of distribution control system

The present invention relates to a device for determining whether or not normal by testing the input, output module, and more specifically, the digital input, output modules and relays used in the distributed control system of power plants by simply and quickly test the normality and failure points Distributed control system input and output module test apparatus for determining

In general, the concept of computer control has been introduced into the process control field since the mid-1960s, and the early computer control concept was a single digital direct digital control (DDC) system until the mid-1970s. The main control method is control by analog connection with field and analogue.

The DDC system is a system that centralizes and manages all the inputs, outputs of process data and monitoring, operation, and control of a plant in one computer.

In the case of such a DDC system, since all the control functions are concentrated in one computer, when an abnormality occurs in the computer, the entire process becomes out of control and a problem in reliability decreases.

Thus, to compensate for the shortcomings of the DDC system, one central processing unit is divided into several small central processing units, separated by functions, and each computer having a small capacity central processing unit is connected to a communication network to form a whole system. Distributed Control System (DCS) was introduced.

The distributed control system divides the system applied to process control into unit sub-systems suitable for each plant, performs each given role in each sub-unit system, and communicates with each other. The distributed control system is a small DDC system. The whole system is composed by connecting several organically.

However, in the conventional distributed control system of the power plant, no test equipment has been developed to check the digital input / output module for abnormality. There was a time-consuming problem.

Accordingly, the present invention has been invented to solve various defects and problems occurring in the conventional power plant distributed control system in view of the above situation, and the digital input / output module and relay used in the distributed power plant control system can be easily and quickly used. Its purpose is to provide a distributed control system I / O module testing apparatus that can be tested to determine whether it is normal and a failure point.

Distributed control system input and output module test apparatus of the present invention for achieving the above object and the power supply unit for supplying power to the device; A test interface unit 20 connected to the power supply unit 10 to interface with a test adapter and a digital output unit; A test adapter 30 connected to the test interface unit 20 to connect a relay unit; A digital output unit 40 connected to the test interface unit 20 to process input and output signals; A controller 50 connected to the digital output unit 40 to control and output an input signal; A touch screen 60 connected to the controller 50 to display and input information under the control of the controller 50; A relay unit 70 connected to the test adapter 30 to test whether there is a defect; The computer 80 is connected to the test interface unit 20 to determine whether the relay unit 70 is defective and outputs the determination result.

The present invention has a particular advantage that can be easily and quickly test the digital input, output module and relay used in the distributed control system of the power plant to determine whether or not the normality and failure point.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a distributed control system input / output module test apparatus of the present invention, FIG. 2 is a block diagram of a first digital output unit according to the present invention, and FIG. 3 is a block diagram of a second digital output unit according to the present invention. 4 is a configuration diagram of a third digital output unit according to the present invention, Figure 5 is a test flow chart of the distributed control system input and output module test apparatus of the present invention, the distributed control system input and output module test apparatus of the present invention supplies power to the device. A power supply unit 10; A test interface unit 20 connected to the power supply unit 10 to interface with a test adapter and a digital output unit; A test adapter 30 connected to the test interface unit 20 to connect a relay unit; A digital output unit 40 connected to the test interface unit 20 to process input and output signals; A controller 50 connected to the digital output unit 40 to control and output an input signal; A touch screen 60 connected to the controller 50 to display and input information under the control of the controller 50; A relay unit 70 connected to the test adapter 30 to test whether there is a defect; And a computer 80 connected to the test interface 20 to determine whether the relay unit 70 is defective and to output the determination result.

The digital output unit 40 includes first to third digital output units 41, 42, and 43, and the first digital output unit 41 includes a digital output waveform generator 41a and a positive digital output buffer ( 41b), a digital input waveform measuring instrument 41c, a digital input conversion detector 41d, and an input and output protector 41e.

The second digital output unit 42 includes a bus interface logic unit 42a, an nvRAM / controller 42b, a digital input and output unit 42c, a serial code EEP ROM 42d, a temperature sensor 42e, and a DAC 42f. ), nvRAM 42g, main voltage circuit 42h, main current circuit 42i, voltage output circuit 42j, current output circuit 42k, and bus 42l.

The third digital output unit 43 includes an interface 43a, an RTSI 43b, an input and output control interrupt control / RTSI control watchdog buffer 43c, an oscillator 43d, an input isolator 43e, It consists of an output buffer, an insulator 43f, and an input / output connector 43g.

Next will be described in detail with reference to the accompanying drawings the operation of the input and output module test apparatus of the present invention distributed control system configured as described above.

5 is a test flow chart of the distributed control system input and output module test apparatus of the present invention. In order to test whether an input and output module is abnormal, first, the power supply unit 10 to the distributed control system input and output module test apparatus of the present invention. Supply power through the), and install the relay unit 70, which is the module under test, through the test adapter 30 in the test interface unit 20.

Subsequently, the computer 80 and the monitor are turned on, the power switch of the power supply unit 10 is turned on, and the main screen is called by double-clicking the P-3000.exe icon on the screen of the monitor (S1). step). Subsequently, the operating voltage of the test target relay unit 70 is selected (step S2), and a supply current for resistance value measurement is selected (step S3). Next, set the resistance reference value (step S4), and select the automatic test and the manual test (step S5). If the automatic test is selected in step S5, go to step S6 to select the number of automatic tests.

The resistance reference value of step S4 is 10 Ω, and the number of automatic tests in step S6 is 1 to 50 times.

After that, the delay time between test relays is set (step S7), and the process proceeds to step S8. If the manual test is selected in step S5, the process proceeds directly to step S8 without proceeding to steps S6 and S7.

The delay time between the test relays in step S7 is 100ms ~ 1,000ms.

In the step S8, click the run icon at the top of the screen. In this case, in the case of the automatic test, the step S9 is executed to click the automatic test button. Then, repeat the test of the abnormality of the relay unit 70 in the order of CH1 to CH16 as many times as the automatic test set in step S6, and if the manual test proceeds to step S10 after step S8, the corresponding relay unit 70 on the screen. Click the test button of).

Then, in step S11, if the test result is less than the resistance reference value, it is determined that the test result is defective.

Then, select whether to print the output record table (step S12), and if the output print table is selected, click the report print button to print the report and then end the test. The test is terminated without output.

While the present invention has been described as a preferred embodiment, the present invention is not limited thereto, and various modifications can be made without departing from the gist of the invention.

1 is a block diagram of an input / output module test apparatus of the present invention distributed control system;

2 is a configuration diagram of a first digital output unit according to the present invention;

3 is a configuration diagram of a second digital output unit according to the present invention;

4 is a configuration diagram of a third digital output unit according to the present invention;

5 is a test flow chart of the input and output module test apparatus of the present invention distributed control system.

<Explanation of symbols for main parts of drawing>

10: power supply 20: test interface

30: test adapter 40: digital output

41: first digital output unit 42: second digital output unit

43: third digital output unit 50: control unit

60: touch screen 70: relay unit

80: computer.

Claims (4)

A power supply unit 10 for supplying power to the apparatus; A test interface unit 20 connected to the power supply unit 10 to interface with a test adapter and a digital output unit; A test adapter 30 connected to the test interface unit 20 to connect a relay unit; A digital output unit 40 connected to the test interface unit 20 to process input and output signals; A controller 50 connected to the digital output unit 40 to control and output an input signal; A touch screen 60 connected to the controller 50 to display and input information under the control of the controller 50; A relay unit 70 connected to the test adapter 30 to test whether there is a defect; Distributed control system input and output module test apparatus, characterized in that configured to the computer connected to the test interface unit 20 to determine whether the relay unit 70 is defective and output the result of the determination. 4. The digital output unit (40) according to claim 1, wherein the digital output unit (40) comprises first to third digital output units (41, 42, 43), and the first digital output unit (41) is a digital output waveform generator (41a). A distributed control system input / output module test apparatus, comprising: a digital output buffer (41b), a digital input waveform measuring instrument (41c), a digital input conversion detector (41d), and an input / output protector (41e). 3. The second digital output section 42 includes a bus interface logic section 42a, an nvRAM / controller 42b, a digital input and output unit 42c, a serial code EEP ROM 42d, and a temperature sensor. 42e), a DAC 42f, an nvRAM 42g, a main voltage circuit 42h, a main current circuit 42i, a voltage output circuit 42j, a current output circuit 42k and a bus 42l. Distributed control system input and output module testing device. The watchdog timer according to claim 2, wherein the third digital output unit (43) has an interface (43a), an RTSI (43b), an input / output control interrupt control / RTSI control watchdog timer. A distributed control system input / output module test apparatus, comprising: (43c), an oscillator (43d), an input isolator (43e), an output buffer, and an insulator (43f), and an input and output connector (43g).

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