KR102199115B1 - Abnormal signal monitoring system for each channel of control card - Google Patents

Abstract

The present invention relates to an abnormal signal monitoring system for each channel of a control card capable of easily specifying a channel in which an abnormal signal is generated, and a plurality of relay switches controlled by a plurality of facilities and a plurality of channels of the control card are provided. And a terminal module to connect, wherein each first terminal of the plurality of relay switches is connected to the plurality of channels through the terminal module, and each second terminal of the plurality of relay switches is connected to the terminal module through the terminal module. It is connected to the power supply of the control card, the terminal module, a plurality of channel fuses connected between each second terminal of the plurality of relay switches and the power supply; And a monitoring device for detecting a voltage from each second terminal of the plurality of relay switches.

Description

Abnormal signal monitoring system for each channel of control card}

The present invention relates to a system for monitoring an abnormal signal for each channel of a control card for a power plant, and in particular, to a system for monitoring an abnormal signal for each channel of a control card capable of easily specifying a channel in which an abnormal signal is generated.

Control cards are usually located in equipment rooms called electronic equipment rooms, and since various facilities are located throughout the field, the length of the cable between the two facilities is usually hundreds of meters, and is installed in various places in power plants.

In order to prevent damage to the control card due to abnormal signals (for example, abnormal signals due to disconnection of cables, short circuit of cables, or leakage current of cables) that may occur in various cables installed in the field, A fuse is installed. This fuse is connected in common to all channels of the control card. Accordingly, in the related art, when an error occurs in one channel of the control card and the fuse is blown, there is a problem in that signal input to all channels including the channel as well as the one channel is blocked.

Therefore, it is difficult to know whether the fuse is blown by an abnormal signal of a channel among all channels.

Korean Patent Registration No. 10-0761908 (registered on September 19, 2007)

An object of the present invention is to provide an abnormal signal monitoring system for each channel of a control card capable of easily specifying a channel in which an abnormal signal is generated.

An abnormal signal monitoring system for each channel of a control card according to the present invention for achieving the above object includes a terminal module connecting a plurality of channels of the control card and a plurality of relay switches controlled by a plurality of facilities. And, each first terminal of the plurality of relay switches is connected to the plurality of channels through the terminal module, and each second terminal of the plurality of relay switches is connected to the power supply of the control card through the terminal module. A plurality of channel fuses connected between the second terminals of the plurality of relay switches and the power supply unit; And a monitoring device for detecting a voltage from each second terminal of the plurality of relay switches.

Further comprising a plurality of light sources disposed to correspond to the plurality of channels, and the monitoring device specifies the blown channel fuse based on the voltage detection result, and selects a light source corresponding to the channel of the specified channel fuse. Turn it on.

The monitoring device transmits channel information corresponding to the lit light source to the monitoring software.

Based on the channel information, the monitoring software manages the occurrence history of abnormal signals for each channel of the control card and the frequency of occurrence of abnormal signals for each channel, and generates a report on a monthly and/or annual basis based on the management result.

And a common fuse connected between the power supply unit and a common node to which second terminals of the plurality of channel fuses are connected.

The individual capacity of each channel fuse is smaller than that of the common fuse.

In addition, an abnormal signal monitoring system for each channel of a control card according to the present invention for achieving the above object is a terminal module that connects a plurality of channels of a control card with a plurality of relay switches controlled by a plurality of facilities. Including, each first terminal of the plurality of relay switches is connected to the plurality of channels through the terminal module, and each second terminal of the plurality of relay switches is a power supply of the control card through the terminal module It is connected to the supply, the terminal module, the reference voltage supply; A plurality of resistance elements connected between the reference voltage supply unit and the plurality of channels; And a monitoring device for detecting voltages from the plurality of channels.

The reference voltage supplied from the reference voltage supply unit through the resistance is greater than the ground voltage and less than the threshold voltage for determining whether the facilities are driven.

Further comprising a plurality of light sources arranged to correspond to the plurality of channels, based on the detection result, the monitoring device specifies the blown channel fuse, and turns on the light source corresponding to the channel of the specified channel fuse Let it.

The monitoring device transmits channel information corresponding to the lit light source to the monitoring software.

Based on the channel information, the monitoring software manages the occurrence history of abnormal signals for each channel of the control card and the frequency of occurrence of abnormal signals for each channel, and generates a report on a monthly and/or annual basis based on the management result.

A common fuse connected between the power supply unit and a common node to which respective second terminals of the plurality of relay switches are connected.

The system for monitoring abnormal signals for each channel of a control card according to the present invention can provide the following effects.

First, according to the present invention, since only the channel fuse of the channel in which the problem has occurred is selectively blown and the channel fuses of the remaining normal channels are maintained as it is, signal input to the remaining normal channels can be performed normally. Accordingly, the present invention can improve the problem of blocking signal input to all channels including the channel when an abnormality occurs in one channel as in the prior art.

Second, losses due to malfunctions such as trips or malfunctions of plant site facilities can be reduced.

Third, by visually displaying the channel in which the abnormal signal is generated through a light source, visual confirmation is immediately possible, the time to search for failures can be shortened, and the resulting equipment normalization time can be shortened to minimize the loss cost.

Fourth, it is possible to manage the history of occurrence of abnormal signals for each channel of the control card and the frequency of occurrence of abnormal signals for each channel.

Fifth, the operator can visually check the channel in which the abnormal signal has occurred, and further, it is possible to prevent the main fuse from being blown.

Sixth, it is possible to prevent accidents in advance by transmitting information on the abnormal signal generation channel to the operator before the common fuse is blown by the abnormal signal.

1 is a block diagram illustrating an abnormal signal detection system for each channel of a control card for a power plant according to an embodiment of the present invention.
2 is a detailed block diagram of a terminal module according to an embodiment of the present invention.
3 is a detailed block diagram of a terminal module according to another embodiment of the present invention.
4 is a diagram showing an example of a fuse monitoring screen implemented by monitoring software according to an embodiment of the present invention.
5 is a diagram showing an example screen of searching for a past history implemented by a monitoring software according to an embodiment of the present invention.
6 is a diagram showing an exemplary screen of a location guide for a failure implemented by a monitoring software according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms different from each other, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention belongs It is provided to completely inform the scope of the invention to those who have it, and the invention is only defined by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques have not been described in detail in order to avoid obscuring interpretation of the present invention. The same reference numerals refer to the same components throughout the specification.

In the drawings, the thicknesses are enlarged to clearly express various layers and regions. The same reference numerals are assigned to similar parts throughout the specification. When a part of a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where the other part is "directly above", but also the case where there is another part in the middle. Conversely, when one part is "directly above" another part, it means that there is no other part in the middle. Further, when a part such as a layer, film, region, plate, etc. is said to be "under" another part, this includes not only the case where the other part is "directly below", but also the case where there is another part in the middle. Conversely, when one part is "right under" another part, it means that there is no other part in the middle.

In this specification, when a part is said to be connected to another part, this includes not only the case of being directly connected but also the case of being electrically connected with another element interposed therebetween. In addition, when a part includes a certain component, it means that other components may be further included rather than excluding other components unless otherwise indicated.

In the present specification, terms such as first, second, and third may be used to describe various elements, but these elements are not limited by the terms. The terms are used for the purpose of distinguishing one component from other components. For example, without departing from the scope of the present invention, a first component may be referred to as a second or third component, and similarly, a second or third component may be alternately named.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically.

Hereinafter, an abnormal signal monitoring system for each channel of the control card for a power plant according to the present invention will be described in detail with reference to FIGS. 1 to 6.

1 is a block diagram illustrating an abnormal signal detection system for each channel of a power plant control card 101 according to an embodiment of the present invention.

The system for detecting abnormal signals for each channel of the control card 101 for a power plant according to an embodiment of the present invention includes a terminal module 200, a control module 400, and a monitoring software 500 as shown in FIG. Can include.

The terminal module 200 electrically connects, for example, a distributed control system 100 (Distributed Control System (DCS)) disposed in an electronic equipment room (or equipment room) and facilities (hereinafter, field facilities) disposed in the field. I can. The distributed control system 100 may include, for example, a control card 101 and a central processing module 102 connected to the control card 101, and the terminal module 200 includes its distributed control system ( 100) of the control card 101 and field facilities (301, 302, 303, ..., 30n) can be connected to each other. As a more specific example, the terminal module 200 may connect a plurality of channels provided in the control card 101 and a plurality of field facilities 301-30n to each other. Here, the number of on-site facilities and the number of channels may be the same. For example, when there are 16 on-site facilities, the control card 101 may include 16 channels (ie, 16 channels). Here, the channel of the control card 101 may be a digital input channel receiving a digital signal from a contact point (or relay switch) of a field facility. Meanwhile, the above-described on-site facilities may refer to related facilities such as a pumping power plant or a thermal power plant.

The control card 101 may receive feedback signals from field facilities through channels. For example, when the control card 101 includes 16 channels, and 16 field facilities are arranged in the field, the control card 101 receives 16 feedback signals from the 16 field facilities through the 16 channels. Are supplied. As a specific example, when the kth channel of the control card 101 corresponds to (or is connected to) the kth field facility in the field, the first channel receives the first feedback signal from the first field facility 301, and The second channel is supplied with a second feedback signal from the second field facility 302, the third channel is supplied with a third feedback signal from the third field facility 303, ..., the nth channel is It is possible to receive the nth feedback signal from the n field facility (30n). The aforementioned k and n are each natural number, and k is less than or equal to n.

The control card 101 may compare each of the supplied feedback signals with a preset threshold voltage, and define each of the feedback signals as a high feedback signal and a low feedback signal according to the comparison result. For example, when the first feedback signal of the first field facility 301 supplied to the first channel CH1 is greater than the aforementioned threshold voltage, the control card 101 converts the first feedback signal into a high feedback signal. On the other hand, when the first feedback signal of the first field facility 301 supplied to the first channel CH1 is less than the aforementioned threshold voltage, the control card 101 converts the first feedback signal to a low feedback signal. Can be defined as Meanwhile, when the first feedback signal is equal to the threshold voltage, the control card 101 may define the first feedback signal as a high feedback signal or a low feedback signal according to a preset algorithm. The high feedback signal(s) and low feedback signal(s) defined for each channel in the control card 101 may be supplied to the central processing module 102.

The central processing module 102 may determine whether the field facilities are in a driving state based on the supplied high feedback signal(s) and low feedback signal(s) for each channel. For example, the central processing module 102 determines that a field facility that has transmitted a high feedback signal is a running field facility (that is, a field facility in a driving state), and the field facility that has transmitted a low feedback signal is not being driven ( In other words, it can be determined as a non-driving state or an idle field facility). In addition, the central processing module 102 may determine whether current field facilities maintain an operating state and an idle state according to a preset algorithm based on the determination result. Based on this finding result, the central processing module 102 may control the field facilities 301-30n (eg, control whether the field facilities operate or not). For example, the first on-site facility 301 is the main motor, the second on-site facility 302 is an auxiliary motor, and the first on-site facility 301, which is the main motor, is in an idle state from a driving state due to an accident. When it is determined that it is changed, the central processing module 102 may change the second field facility 302, which is an idle auxiliary motor, into a driving state according to a preset algorithm. On the other hand, in controlling the field facilities, the central processing module 102 may determine whether a valve connected to the field facility is opened according to the above-described feedback signal. For example, when the feedback signal from the field facility is a high feedback signal, the central processing module 102 determines that the above-described valve is open, and when the feedback signal is a low feedback signal, the central processing module 102 Can be determined to be closed. In addition, the central processing module 102 may control whether or not a valve of a corresponding field facility is opened according to the above-described algorithm.

The control module 400 may include a monitoring device 260 and an isolator 250 to be described later in FIG. 2. In addition, as another embodiment, the control module 400 may include a monitoring device 260 to be described later in FIG. 3. In particular, the control module 400 may control whether or not a light source corresponding to a corresponding channel is turned on based on an abnormal signal detection signal for each channel from the terminal module 200. Here, the light source may include, for example, a Light Emitting Diode (LED).

The monitoring software 500 may manage the occurrence history of abnormal signals for each channel of the control card 101 to be described later and the frequency of occurrence of abnormal signals for each channel. In addition, the monitoring software 500 may generate a report on a monthly and/or annual basis based on the management result.

2 is a detailed block diagram of a terminal module 200 according to an embodiment of the present invention, and the terminal module 200 of FIG. 2 may be applied to the terminal module 200 of FIG. 1 described above.

Meanwhile, prior to describing the terminal module 200 of FIG. 2, peripheral components connected thereto, for example, the control card 101 and field facilities 301-30n will be described first.

The control card 101 may include a power supply unit 110 and a common fuse 120 as shown in FIG. 2. Here, the power supply unit 110 may supply, for example, a power voltage of 24 [V]. The common fuse 120 prevents damage to the control card 101 due to abnormal signals (e.g., abnormal signals due to disconnection of cables, short circuits of cables, or leakage currents of cables) that may occur in various cables installed in the field. It is installed in the control card 101 to prevent. The common fuse 120 may be connected between the output terminal of the power supply unit 110 and the power supply line PL. The above-described cable may include, for example, a power supply line PL, and branch power lines BPL1-BPLn and channel lines CL1-CLn, which will be described later.

In addition, the first to nth field facilities 301-30n in the field control the first to nth relay switches RS1-RSn. For example, the first field facility 301 controls the on and off operation of the first relay switch RS1, and the second field facility 302 controls the on and off operation of the second relay switch RS2. Control, and the third field facility 303 controls the on and off operation of the third relay switch RS3, ..., and the nth field facility 30n is the nth relay switch RSn On and off operations can be controlled. Here, each of the relay switches RS1-RSn may be a contact point of a corresponding field facility connected thereto. For example, the first relay switch RS1 is a contact point of the first field facility 301, the second relay switch RS2 is a contact point of the second field facility 302, and the third relay switch RS3 is It is a contact point of the third field facility 303, ..., and the nth relay switch RSn may be a contact point of the nth field facility 30n.

The field facility turns on the relay switch corresponding to its own contact point when it is running, while it turns off the relay switch corresponding to its own contact point when it is idle. As an example, when the first field facility 301 is running, and the remaining second to nth field facilities 302-30n are in an idle state, the first field facility 301 is a first relay switch RS1 ) Is turned on, and the second to nth field facilities 302-30n turn off the second to nth relay switches RS2-RSn.

The terminal module 200 according to an embodiment of the present invention includes a plurality of channel fuses FS1-FSn provided for each channel, an isolator 250, and a monitoring device 260, as shown in FIG. 2. can do.

The terminal module 200 may connect the relay switches RS1-RSn of the field facilities 301-30n and a plurality of channels CH1-CHn of the control card 101.

The relay switch may include a first relay terminal 201 and a second relay terminal 202 that are electrically connected to or disconnected from each other by the on or off operation of the relay switch, relay switches RS1-RSn Each of the first terminals E1 of may be connected to the channels CH1-CHn through the terminal module 200. For example, the first terminal E1 of the first relay switch RS1 is a first relay terminal 201 and a second relay terminal 202 corresponding to each other of the terminal module 200. It is connected to the channel CH1, and the first terminal E1 of the second relay switch RS2 is another pair of first relay terminals 201 and the second relay terminals corresponding to each other of the terminal module 200 ( It is connected to the second channel CH2 through 202, and the first terminal E1 of the third relay switch RS3 is another pair of first relay terminals 201 corresponding to each other of the terminal module 200 And connected to the third channel (CH3) through the second relay terminal 202, ..., and the first terminal (E1) of the n-th relay switch (RSn) is the terminal module 200 corresponding to each other It may be connected to the n-th channel CHn through the other pair of first and second relay terminals 201 and 202.

In addition, each second terminal E2 of the relay switches RS1-RSn may be connected to the power supply unit 110 through the terminal module 200. For example, the second terminal E2 of the first relay switch RS1 is a power supply unit through a pair of the third relay terminal 203 and the fourth relay terminal 204 corresponding to each other of the terminal module 200 It is connected to 110, the second terminal E2 of the second relay switch RS2 is another pair of the third relay terminal 203 and the fourth relay terminal 204 corresponding to each other of the terminal module 200 ) Is connected to the power supply unit 110, and the second terminal E2 of the third relay switch RS3 is another pair of the third relay terminal 203 and the third relay terminal 203 corresponding to each other of the terminal module 200. It is connected to the power supply unit 110 through the 4 relay terminal 204, ..., and the second terminal (E2) of the n-th relay switch (RSn) is another pair corresponding to each other of the terminal module 200 It may be connected to the power supply unit 110 through the third relay terminal 203 and the fourth relay terminal 204 of.

Meanwhile, the channel fuse may be connected between a pair of the third relay terminal 203 and the fourth relay terminal 204 corresponding to each other of the terminal module 200. For example, the first channel fuse FS1 is connected between the pair of third relay terminals 203 and the fourth relay terminal 204 of the terminal module 200, and the second channel fuse FS2 is a terminal It is connected between another pair of the third relay terminal 203 and the fourth relay terminal 204 corresponding to each other of the module 200, and the third channel fuse FS3 corresponds to each other of the terminal module 200. Another pair of the third relay terminal 203 and the fourth relay terminal 204 are connected to each other, ..., and the n-th channel fuse FSn is another one corresponding to each other of the terminal module 200 It may be connected between the pair of third relay terminals 203 and fourth relay terminals 204.

In addition, each one terminal of each of the channel fuses FS1 to FSn is connected to one common node (eg, the power supply line PL). Accordingly, one terminal of each of the channel fuses FS1 to FSn may be connected to the power supply unit 110 through the power supply line PL and the common fuse 120.

In addition, the individual capacity of each channel fuse FS1-FSn is smaller than that of the common fuse 120. For example, the first to nth channel fuses FS1-FSn may all have the same capacity, and in this case, the capacity of the first channel fuse FS1 may be smaller than the capacity of the common fuse 120. Accordingly, when an abnormal signal is generated in the channel, the channel fuse may be blown before the common fuse 120.

The channel of the control card 101 may be connected to the relay switch through a channel line electrically connecting a pair of the first relay terminal 201 and the second relay terminal 202 corresponding to each other of the terminal module 200. have. For example, the first channel CH1 is through the first channel line CL1 connecting the pair of the first relay terminal 201 and the second relay terminal 202 corresponding to each other of the terminal module 200. It is connected to the first terminal E1 of the first relay switch RS1, and the second channel CH2 is another pair of the first relay terminals 201 and the second relay corresponding to each other of the terminal module 200. It is connected to the first terminal E1 of the second relay switch RS2 through a second channel line CL2 connecting the terminal 202, and the third channel CH3 corresponds to each other of the terminal module 200. It is connected to the first terminal E1 of the third relay switch RS3 through a third channel line CL3 connecting another pair of the first relay terminal 201 and the second relay terminal 202, ..., and the n-th channel CHn is an n-th channel line CLn connecting another pair of the first relay terminal 201 and the second relay terminal 202 corresponding to each other of the terminal module 200. ) May be connected to the first terminal E1 of the nth relay switch RSn.

Also, the channel fuse may be disposed on the branch power line connecting the common fuse 120 and the relay switch. For example, the first channel fuse FS1 is disposed on the first branch power line BPL1 connecting the common fuse 120 and the second terminal E2 of the first relay switch RS1, and the second The channel fuse FS2 is disposed on the second branch power line BPL2 connecting the common fuse 120 and the second terminal E2 of the second relay switch RS2, and the third channel fuse FS3 is It is disposed on the third branch power line BPL3 connecting the common fuse 120 and the second terminal E2 of the third relay switch RS3 ..., and the n-th channel fuse FSn is common It may be disposed on the nth branch power line BPLn connecting the fuse 120 and the second terminal E2 of the nth relay switch RSn. Here, each branch power line (BPL1-BPLn) is branched from the power supply line (PL), and each one end of each branch power line (BPL1-BPLn) is commonly connected to the power supply line (PL). Each other end of the branch power lines BPL1 to BPLn may be individually connected to the second terminal E2 of the corresponding relay switch.

Meanwhile, when the control card 101 does not have the common fuse 120, the channel fuse may be disposed on a branch power line connecting the power supply unit 110 and the relay switch. As an example, the first channel fuse FS1 may be disposed on the first branch power line BPL1 connecting the power supply 110 and the second terminal E2 of the first relay switch RS1. .

The monitoring device 260 may detect a voltage from each of the second terminals E2 of the relay switches RS1-RSn. For example, the monitoring device 260 includes a voltage from the second terminal E2 of the first relay switch RS1, a voltage from the second terminal E2 of the second relay switch RS2, and a third relay switch ( The voltage from the second terminal E2 of RS3), ... and the voltage from the second terminal E2 of the n-th relay switch RSn may be detected. Also, the monitoring device 260 may detect a blown channel fuse and a channel to which the blown channel fuse is connected based on the detected voltages. To this end, for example, the monitoring device 260 may include a comparator and a channel specifying unit. The comparator may compare each of the detected voltages for each channel with a preset comparison reference voltage, and transmit a comparison result for each channel to the channel specifying unit. Then, the channel specifying unit may detect the blown channel fuse and a channel connected thereto based on the comparison result for each channel. The voltage of the branch power line connected to the blown channel fuse may be smaller than the above-described comparison reference voltage, and the voltage of the branch power line connected to the normal state channel fuse may be greater than the aforementioned comparison reference voltage.

Meanwhile, the monitoring device 260 and each branch power line may be directly connected, but may be connected through an isolator 250 for preventing a short circuit between channels, as shown in FIG. 2. Here, the isolator 250 may be a voltage attenuator integrated isolator 250.

Since a separate channel fuse for each channel is provided as described above, when an abnormal signal occurs in a specific channel, the monitoring device 260 may specify the channel in which the abnormal signal is generated. For example, when only the first fuse channel is blown due to a short circuit of the first branch power line BPL1 connected to the first channel CH1, the voltage detected from the first branch power line BPL1 is zero. It is different from voltages detected from the second to nth branch power lines BPL2-BPLn connected to the second to nth channels CHn. Therefore, the channel in which the abnormal signal is generated can be easily specified.

In addition, according to the present invention, since only the channel fuse of the channel in which the problem has occurred is selectively blown and the channel fuses of the remaining normal channels are maintained, signal input to the remaining normal channels (for example, feedback signal input) is It can be done normally. Accordingly, the present invention can improve the problem of blocking signal input to all channels including the channel when an abnormality occurs in one channel as in the prior art. In addition, losses due to malfunctions such as trips or malfunctions of facilities in the power plant can be reduced.

Meanwhile, although not shown, the terminal module 200 may further include light sources arranged to correspond to channels. For example, the light sources may include first to nth light sources arranged to correspond to the first to nth channels CH1-CHn. Here, the first to nth light sources may be installed outside the terminal module 200, for example.

Based on the voltage detection result, the above-described monitoring device 260 may specify the blown channel fuse and selectively light a light source corresponding to the channel of the specified channel fuse. For example, when the first channel fuse FS1 is blown, the monitoring device 260 may turn on the first light source corresponding to the first channel CH1 to which the first channel fuse FS1 is connected. By visually displaying the channel in which the abnormal signal is generated in this way through a light source, it is possible to immediately check the naked eye, shorten the time to search for a failure, and shorten the time to normalize the facility due to it, thereby minimizing loss costs.

In addition, the monitoring device 260 may transmit channel information corresponding to the lit light source to the monitoring software 500.

Based on the channel information, the monitoring software 500 may manage the occurrence history of abnormal signals for each channel of the control card 101 and the frequency of occurrence of abnormal signals for each channel. In addition, the monitoring software 500 may generate a report on a monthly and/or annual basis based on the management result.

Meanwhile, the control module 400 of FIG. 1 may include the monitoring device 260 and the isolator 250 of FIG. 2. In other words, as shown in FIG. 2, the monitoring device 260 and the isolator 250 may be disposed within the terminal module 200 or may be disposed outside the terminal module 200. When the monitoring device 260 and the isolator 250 are disposed outside the terminal module 200, the monitoring device 260 and the isolator 250 are provided as one module (the control module 400 described above). Can be.

3 is a detailed block diagram of a terminal module 200 according to another embodiment of the present invention, and may be applied to the terminal module 200 of FIG. 3 and the terminal module 200 of FIG. 1 described above.

Since the control card 101 and field facilities of FIG. 3 are the same as the control card 101 and field facilities 301-30n of FIG. 2 described above, a description of these will refer to FIG. 2 and related contents.

As shown in FIG. 3, the terminal module 200 may include a reference voltage supply unit 210, a plurality of resistance elements R1 -Rn, and a monitoring device 260.

The plurality of resistance elements R1 to Rn may be provided as many as the number of channels. For example, the resistive elements R1-Rn may include first to nth resistive elements R1-Rn. Here, all of the first to nth resistance elements R1 to Rn may have the same resistance value.

The first resistance element R1 is connected between the reference voltage supply unit 210 and the first channel CH1, and the second resistance element R2 is connected between the reference voltage supply unit 210 and the second channel CH2. The third resistance element R3 is connected between the reference voltage supply unit 210 and the third channel CH3, ..., and the n-th resistance element Rn is the reference voltage supply unit 210 and the n-th It may be connected between the channels CHn.

The reference voltage from the reference voltage supply unit 210 is supplied to each channel line CL1 to CLn through each resistance element R1 to Rn. Here, the reference voltage (i.e., the divided reference voltage) divided through the resistance element and input to the channel line may be greater than the ground voltage and less than the voltage of the above-described threshold voltage (threshold voltage for determining whether a field facility is driven). have. For example, when the threshold voltage is 12 [V], the reference voltage (divided reference voltage) may be 3 [V].

The monitoring device 260 detects a voltage from each of the channel lines CL1-CLn, and determines that an abnormal signal has occurred in the corresponding channel line when the detected voltage is less than the above-described divided reference voltage. For example, the voltage detected from the first channel line CL1 is 0 [V], and the voltages detected from the second to nth channel lines CL2-CLn are 3 [V] and 24 [V], respectively. In either case, the monitoring device 260 determines that an abnormal signal has been generated in the first channel line CL1. When this abnormal signal occurs, the common fuse 120 may be blown, and before the common fuse 120 is blown, the monitoring device 260 is a contact point of the first field facility 301 connected to the first channel CH1 (i.e. , It is possible to prevent damage to the control card 101 by controlling the first field facility 301 to immediately turn off the first relay switch RS1.

On the other hand, when the first field facility 301 is the main motor and the second field facility 302 is an auxiliary motor for replacing the main motor when the main motor fails, the contact point of the second field facility 302 ( That is, the second relay switch RS2 is normally turned off. That is, the 2nd relay switch RS2 of this 2nd field facility 302 is normally off. Therefore, the second channel line CL2 corresponding to the second field facility 302 is not normally connected to the first branch power line BPL1. Therefore, the voltage from the power supply unit 110 is not normally supplied to the second channel line CL2, but only the reference voltage (divided reference voltage) from the reference voltage supply unit 210 is supplied. Accordingly, it may be determined in advance whether or not the voltage of the second channel line CL2 is normal when the second field facility 302 is not driven normally. If the voltage normally detected from the second channel line CL2 is 0 [V], the monitoring device 260 determines that an abnormal signal has been generated in the second channel line CL2. Then, in the event of a failure of the first field facility 301, the monitoring device 260 may control field facilities such that other field facilities other than the second field facility 302 are used as auxiliary motors.

4 is a diagram showing an example of a fuse monitoring screen implemented by the monitoring software 500 according to an embodiment of the present invention.

As illustrated in FIG. 4, when there is no abnormality in each of the channel fuses FS1-FSn, a state of the corresponding channel fuse on the fuse monitoring screen may be displayed as “normal”.

On the other hand, the monitoring software 500 is provided with a user-centered GUI (Graphic User Interface). In addition, the monitoring software 500 may be configured in the form of a server or a client, and the server may be installed in an electronic equipment room to monitor abnormal signals at all times, and the client may be configured in a form in which a plurality of managers can monitor through a network in a cab or monitoring room. . In addition, the monitoring software 500 includes a Windows-based system configuration, and may include a GUI configuration for guiding the location of a failure as shown in FIG. 3.

In addition, the monitoring software 500 provides efficient management and detailed item tracking management through group designation, channel configuration user setting change function, failure occurrence history management (Log) function and past history search (Trend) function. In addition, it is possible to provide a function to restrict unauthorized user access through login ID and password functions.

5 is a diagram showing an example screen for searching past history implemented by the monitoring software 500 according to an embodiment of the present invention.

As shown in FIG. 5, the monitoring software 500 provides a function for managing the failure occurrence history for each channel fuse FS1-FSn, and searches the past fixed history of each channel fuse FS1-FSn. Can be displayed.

6 is a diagram showing an exemplary screen of a location guide for a failure implemented by the monitoring software 500 according to an embodiment of the present invention.

In FIG. 6, light source images corresponding to light sources are displayed, and a light source image corresponding to any one light source is highlighted in red, and the light source image highlighted in red is displayed corresponding to the channel where the current failure occurs. It may correspond to a light source.

Meanwhile, as another embodiment of the terminal module illustrated in FIG. 2, each of the channel fuses FS1-FSn may have different capacities. For example, the capacities of the first to nth channel fuses FS1 to FSn may be set based on the driving order of the first to nth field facilities 301-30n. As an example, when n number of field facilities (301-30n) are sequentially driven from the first field facility 301 to the nth field facility 30n, n number of channel fuses FS1-FSn The capacity may be gradually decreased or gradually increased in the order of the first channel fuse FS1 to the nth channel fuse FSn. As a more specific example, the first field facility 301 among the n field facilities 301-30n is the main motor driven first, and an auxiliary for replacing the main motor when an abnormality occurs in this main motor. An example in which the second to nth field facilities 302-30n can be sequentially driven as a motor will be described. If an abnormality occurs in the first on-site facility 301, the operation of the first on-site facility 301 is stopped, and the second on-site facility 302, which is in an idle state, is changed to the operating state, and thereafter, the second on-site facility 302 When an abnormality occurs in the second site facility 302, the operation of the second site facility 302 is stopped, and the idle third site facility 303 is changed to the operating state. 3 The operation of the on-site facility 303 is stopped and the 4th on-site facility, which is in an idle state, is changed to the operating state, ..., if an abnormality occurs in the n-1 on-site facility after that, the n-1 on-site facility is operated Is stopped and the nth field facility 30n in an idle state may be changed to a driving state. As described above, when the n number of field facilities 301-30n are driven in the order of the first to nth field facilities, the first channel fuse FS1 corresponding to the first field facility 301 driven first is the n The n-th channel fuse FSn corresponding to the n-th field facility 30n has the smallest capacity among the number of channel fuses FS1-FSn, and the largest capacity among the n-channel fuses FS1-FSn. Can have. In addition, the second to n-1th channel fuses FS1-FSn may have a capacity sequentially decreasing. In other words, the second channel fuse FS2 has a larger capacity than the first channel fuse FS1, the third channel fuse FS3 has a larger capacity than the second channel fuse FS2, ?, In addition, the n-1th channel fuse may have a larger capacity than the n-2th channel fuse. However, the capacity of the n-th channel fuse FSn having the largest capacity is smaller than that of the common fuse 120.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and that various substitutions, modifications, and changes are possible within the scope of the technical spirit of the present invention. It will be obvious to those who have the knowledge of.

101: control card 200: terminal module
300: site 110: power supply
120: common fuse FS1-FSn: first to nth channel fuses
CH1-CHn: first to nth channels PL: power supply line
201: first relay terminal 202: second relay terminal
203: third relay terminal 204: fourth relay terminal
260: monitoring device 250: isolator
E1: first terminal E2: second terminal
301-30n: 1st to nth field facilities
RS1-RSn: 1st to nth relay switches
CL1-CLn: first to nth channel lines
BPL1-BPLn: 1st to nth branch power lines

Claims (12)

delete delete delete delete delete delete A terminal module for connecting a plurality of channels of a control card and a plurality of relay switches controlled by a plurality of facilities,
Each first terminal of the plurality of relay switches is connected to the plurality of channels through the terminal module,
Each second terminal of the plurality of relay switches is connected to a power supply of the control card through the terminal module,
The terminal module,
A reference voltage supply;
A plurality of resistance elements connected between the reference voltage supply unit and the plurality of channels; And
A monitoring device that detects voltages from the plurality of channels and specifies an abnormally generated channel based on the detection result,
The reference voltage supplied from the reference voltage supply unit through the resistance is greater than a ground voltage and less than a threshold voltage for determining whether the equipment is driven or not. delete The method of claim 7,
Further comprising a plurality of light sources arranged to correspond to the plurality of channels,
The monitoring device is an abnormal signal monitoring system for each channel of a control card for selectively lighting a light source corresponding to the specified channel. The method of claim 9,
The monitoring device is an abnormal signal monitoring system for each channel of a control card that transmits channel information corresponding to the lit light source to the monitoring software. The method of claim 10,
Based on the channel information, the monitoring software manages the occurrence history of abnormal signals for each channel of the control card and the frequency of occurrence of abnormal signals for each channel, and generates a report on a monthly and/or annual basis based on the management result. Abnormal signal monitoring system for each channel. The method of claim 7,
An abnormal signal monitoring system for each channel of a control card, further comprising a common fuse connected between the power supply unit and a common node connected to each of the second terminals of the plurality of relay switches.

Images