KR20170142013A - Apparatus and method for multiple controlling the relay using logical operation - Google Patents

Abstract

The present invention relates to a relay multi-control apparatus using a logical operation and a method thereof which can determine whether a relay is unintentionally opened by mutually performing logical operation on a relay control signal applied by a micro controller unit (MCU) and a detection signal according to a current opening state of the relay, and furthermore can normally drive a circuit including the relay by re-changing a state of the unintentionally opened relay to a closing state to enable the relay to form an interconnection again.

Description

[0001] DESCRIPTION [0002] APPARATUS AND METHOD FOR MULTIPLE CONTROLLING THE RELAY USING LOGICAL OPERATION [

The present invention relates to a relay multiplexing control apparatus and method using logic operation, and more particularly, to a relay multiplexing control apparatus and a relay multiplexing control method using a logical operation of a relay control signal applied from a microcontroller unit (MCU) So that the circuit including the relay can be normally driven so as to allow the relay to form a contact again so that the relay can be normally operated. Relay multi-control apparatus and method.

With the rapid development of industry and economy in recent years, the amount of electricity that can be used to make such a development has increased along with the amount of battery that is also called a battery.

Generally, a battery capable of charging and discharging is also referred to as a battery or a secondary battery, and a chemical (e.g., sulfuric acid) existing in the battery is electrolyzed by a chemical action using two plates such as a copper plate and a zinc plate (Positive electrode) and negative electrode (negative electrode), so that the current flows through the positive electrode and the negative electrode, and the negative electrode As shown in FIG.

On the other hand, in the case of a battery applied to a vehicle, a contact opening / closing device such as a relay is further provided on a circuit connecting a vehicle and a battery to protect an in-vehicle circuit from an overcurrent, do.

A relay applied to a conventional vehicle battery will be schematically described as follows. By applying power to a close pin of a relay capable of state transition (open state or closed state) through a switching operation for several tens of ms, (Closing state) can be maintained by providing a magnetic body having a predetermined magnetic force at the distal end portion of the closing pin, so that the closing pin is brought into contact with the contact point.

Therefore, the relay can always maintain the contact state (closed state) even when a separate power supply for driving the relay is not continuously performed during the operation of the vehicle, which means that the current between the vehicle battery and the vehicle is always conductive .

However, when the vehicle travels on unpaved roads or when a strong external impact is applied to the vehicle, the closing pin in contact with the contact is inadvertently short-circuited, resulting in the current being interrupted between the vehicle battery and the vehicle Problem.

In this case, when the closing pin is inadvertently short-circuited and the current between the vehicle battery and the vehicle is interrupted, the vehicle operator must re-apply the power to the closing pin of the relay for several tens of msec, The pin must be brought into contact again with the contact point and the power supply to the vehicle being normally operated is interrupted, so that normal vehicle operation is impossible.

In order to solve the above-mentioned conventional problem of a vehicular relay which may inadvertently be short-circuited, the present inventor has proposed a relay control system in which a relay control signal applied from a microcontroller unit (MCU) and a detection signal corresponding to a current opening / It is possible to judge whether or not the relay is unintentionally opened by performing a logic operation with respect to each other and also to re-change the state of the relay unintentionally opened to the closed state so that the relay forms the contact again so that the circuit including the relay can be normally driven The present invention has been accomplished on the basis of these findings.

Korea Patent Publication No. 2012-0003306

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a method and apparatus for operating a microcontroller unit (MCU) And also to re-change the state of the relay unintentionally opened to the closed state so that the relay forms a contact again so that the circuit including the relay can be driven normally, And methods.

The relay multiplexing control apparatus using logic operation according to an embodiment of the present invention includes a microcontroller unit (MCU) for detecting an open / close state of a relay whose state is changed by a first open / And a determination unit for determining whether the relay is open or closed according to a logical operation result of the first open / close signal and the detection signal and outputting a determination signal.

In one embodiment, the microcontroller unit may apply a second open / close signal to the relay based on the determination signal so that the open / close state of the relay is changed again.

In one embodiment, the open / close state detecting unit includes a measuring unit for measuring a voltage across the relay, a calculating unit for calculating a voltage difference between both ends based on the measured voltage at both ends, And a generating unit for generating a signal.

In one embodiment, the generator generates a first detection signal corresponding to a low bit when the relay is closed and the voltage difference between both ends does not exceed a preset threshold voltage value, And outputs a second detection signal corresponding to a high bit when the relay voltage is greater than a predetermined threshold voltage value to determine whether to open or close the relay. Can be output.

In one embodiment, the opening / closing determination unit may determine whether the relay is open or closed by performing a Boolean logarithm (OR) operation using the first open / close signal and the first detection signal, It is possible to determine whether the relay is opened or closed by performing a Boolean logarithmic operation using the second detection signal.

In one embodiment, when the output value according to the calculation corresponds to a low bit, the opening / closing determination unit determines that the relay is in the closed state and determines that the relay is in the closed state, And outputs a second determination signal to change the open state of the relay to a closed state when it is determined that the relay open / close state is an open state, when the output value according to the operation corresponds to a high bit .

In one embodiment, when the second determination signal is applied from the opening / closing determination unit, the microcontroller unit applies the second opening / closing signal to the relay so that the opening state of the relay is changed again to the closed state .

In one embodiment, the relay multi-controller may further include an operation determining unit for determining an operating state of the open / close state detecting unit and outputting an operation determining signal according to a logic operation result of an open signal and a close signal applied from the micro controller unit .

In one embodiment, the operation determining section determines that the open / close state detecting section has detected the first operation determining signal for changing the operation state of the open / close state detecting section to the enable state and the open / The control unit may output a second operation determination signal for changing the operation state of the open / close state detection unit to a disable state so that the state detection unit does not detect the open / close state of the relay.

In one embodiment, the operation determination unit may determine the operation state of the open / close state detection unit based on the result of the NOR operation and output the first and second operation determination signals.

In the relay multiplexing control method using logic operation according to another embodiment of the present invention, the open / close state of the relay whose state is changed by the first open / close signal applied from the microcontroller unit (MCU) is detected by the open / Determining whether the relay is opened or closed in the open / close state detecting unit and outputting a determination signal in accordance with a logical operation result of the first open / close control signal and the detection signal; A second opening / closing signal for changing the opening / closing state of the relay on the basis of the second opening / closing signal, and a step in which the opening state of the relay is changed again to the closed state by the second opening / closing signal .

In one embodiment, the step of outputting the detection signal includes the steps of measuring a voltage across the relay through a measurement unit, calculating a voltage difference between both ends based on the measured voltage across both ends through a calculation unit, And generating a detection signal based on the voltage difference between the both ends.

In one embodiment, the generating of the detection signal may include: if the relay is closed so that the voltage difference between the both ends does not exceed a predetermined threshold voltage value, the generator generates a detection signal corresponding to a low bit 1 " detection signal and outputting the detection signal to the opening / closing determination unit; and when the relay is opened and the voltage difference between both ends exceeds a preset threshold voltage value, And outputting the second detection signal to the opening / closing determination unit.

In one embodiment, the outputting of the determination signal may include determining whether the relay is open or closed by performing a Boolean logarithm (OR) operation using the first open / close signal and the first detection signal in the open / And determining whether the relay is opened or closed by performing a Boolean logarithmic operation using the first opening / closing control signal and the second detection signal in the opening / closing determination unit.

In one embodiment, when the output value according to the operation corresponds to a low bit, the determining whether or not the relay is in the closed state determines that the relay is in the closed state, And outputting a first determination signal for determining whether the relay is open or closed if the output value according to the operation corresponds to a high bit, And outputting a second determination signal for changing to a closed state.

In one embodiment, the step of applying the second open / close signal to the relay includes: when the second determination signal is applied from the open / close determination unit, the open state of the relay is changed And applying a second open / close signal to the relay.

According to an embodiment of the present invention, the relay multiplexing control method may further comprise: an operation determining unit operable to determine an operation state of the open / close state detecting unit according to a logical operation result of an open signal and a close signal applied from the micro controller unit, Step < / RTI >

In one embodiment, the step of outputting the operation determination signal may include outputting the operation determination signal to the operation determination unit such that the operation state of the open / close state detection unit is set to an enable state so that the open / close state detection unit can detect the open / Outputting a first operation determination signal for changing the operation state of the relay, and outputting a first operation determination signal for changing the operation state of the open / close state detection unit to a disable state in the operation determination unit such that the open / 2 operation decision signal.

In one embodiment, the step of outputting the operation determination signal may include determining an operation state of the open / close state detection unit based on a result of the NOR operation in the operation determination unit, and outputting the first and second operation determination signals And outputting the output signal.

The relay multiplexing control apparatus and method using the logic operation according to the present invention logically calculates the relay control signal applied from the microcontroller unit (MCU) and the detection signal according to the current open / close state of the relay, It is possible to quickly perform the relay state re-change action according to the determination.

The present invention also has the advantage that the vehicle can be quickly and normally restored by allowing the relays to again establish contact points by quickly re-modifying the open state of the inadvertently opened relay to the closed state.

Further, since the present invention does not detect the open / close state of the relay in a state where the vehicle is not operated and does not perform a logic operation, it has an advantage of preventing unnecessary power consumption for separately controlling the relay during non-operation of the vehicle .

FIG. 1 is a diagram schematically showing a configuration of a relay multiplexing control apparatus 100 using logic operations according to an embodiment of the present invention.
2 is a diagram showing the configuration of the open / close state detecting unit 120 shown in FIG. 1 in more detail.
FIG. 3 is a diagram illustrating a process of sequentially performing a relay multiplexing control method using logical operations according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the purpose of easier understanding of the present invention, and the present invention is not limited by the examples.

FIG. 1 is a diagram schematically showing a configuration of a relay multiplexing control apparatus 100 using logic operations according to an embodiment of the present invention.

1, a relay multi-controller 100 using logic operation according to an exemplary embodiment of the present invention includes a microcontroller unit (MCU) 110, an open / close state detector 120, and an open / And may further include an operation decision unit 140. [0050] FIG.

First, the microcontroller unit 110 applies opening / closing signals (more specifically, first and second opening / closing signals) for controlling the relay 3 provided on the circuit between the vehicle battery 1 and the vehicle 2 Can play a role.

Here, the open / close signal may mean a kind of control signal for changing the relay corresponding to the open state to a closed state by closing the first relay signal. In the present specification, the first open / (For example, a signal for first closing the relay 3), which is firstly applied to the relay 3 as the driving of the relay 3 is started, and the second open / May be an open / close signal that is reapplied to re-change the state of the relay 3 to the closed state when it is forcibly opened due to an unintended situation.

The microcontroller unit 110 may re-change the open / close state of the relay 3 on the basis of a determination signal applied from the open / close determination unit 130, which will be described later. The present invention will be described in more detail with reference to FIG.

The microcontroller unit 110 may be a control device provided with a battery management system (BMS) (not shown) included in the vehicle 2, Note that the microcontroller unit 110 is not limited in its application range as long as it can control the opening and closing state.

The term "relay 3" as used herein refers to a switching device capable of transitioning from a contact state to an open state or a closed state through a switching operation. In particular, May refer to a device in which the closing pin is brought into contact with the contact by internal core movement as power is applied for several tens of milliseconds from the microcontroller unit 110 as the magnetic body is provided. It should be noted that the type of the relay 3 described above is not limited as long as it corresponds to a device whose state can be changed through a switching operation.

Next, the open / close state detecting unit 120 can detect the open / close state of the relay 3 whose state has been changed by the first open / close signal applied from the microcontroller unit 110 and output a detection signal have.

More specifically, the open / close state detecting unit 120 can detect the current open / close state of the relay 3 in real time and then output a detection signal according to the detection result. To this end, 121, an output unit 122, and a generation unit 123. [

The measuring unit 121 may measure the voltage across the relay 3 and may be, for example, a voltage detector.

The calculating unit 122 may calculate the voltage difference between both ends based on the voltage between both ends of the relay 3 measured through the measuring unit 121 and then provide the calculated result to the generating unit 123.

The generation unit 123 may generate a detection signal based on the calculation result provided from the calculation unit 122. For example, when the voltage difference between the both ends of the relay 3 is equal to a preset threshold voltage value , The generating unit 123 determines that the current state of the relay 3 is in the open state because the voltage difference between the terminals of the relay 3 is not generated, It is possible to generate a first detection signal corresponding to a low bit (e.g., 0) and provide the first detection signal to the later-described open / close determination unit 130.

Likewise, when the voltage difference across the relay 3 exceeds a predetermined threshold voltage value (for example, 0.1v), the generator 123 generates a voltage difference between the terminals of the relay 3, It may be determined that the open / close state is an open state, and a second detection signal corresponding to a high bit (for example, 1) may be generated and provided to the later-described open / close determination unit 130 .

Here, since the relay 3 corresponds to a state in which the open / close state is changed to the closed state through the first open / close signal first applied from the microcontroller unit 110, a voltage difference between both ends of the measurement unit 121 is generated Can be interpreted to mean that the contact of the relay 3 is forcibly short-circuited by an unintended situation (e.g., an external shock, etc.).

Therefore, after detecting the forced short circuit of the relay 3, the generator 123 provides the second detection signal to the determination unit 130 so that the relay unit 3 Can be changed again.

In the present specification, the bits of the first and second detection signals are described as being low-bit and high-bit, respectively, but it is not limited thereto, and the first detection signal may be a high-bit and the second detection signal may be a low- It should be noted that the first and second detection signals are not limited signals as long as the first and second detection signals correspond to signals having different properties.

Next, the opening / closing determination unit 130 performs a logical operation on the first opening / closing signal and the first and second detection signals, respectively, applied from the above-described generating unit 123, 3 can be opened or closed.

More specifically, when the contact of the relay 3 is forcibly short-circuited due to an unintended situation, the opening / closing decision unit 130 determines whether the first opening / closing signal previously applied from the microcontroller unit 110, It is possible to confirm whether or not the microcontroller unit 110 has actually applied the opening and closing signals for opening the relay 3 after the logical operation of the detection signals of the relay 3 And to provide a second detection signal to the microcontroller unit 110 for re-changing the state to the closed state.

For example, the opening / closing determination unit 130 performs a Boolean logarithm (OR) operation using a first opening / closing signal (e.g., 0) and a first detection signal (e.g., 0) If the result is a low bit (e.g., 0), the microcontroller unit 110 did not apply an open / close signal to open the relay 3, and the state of the relay 3 is also kept in the current closed state And to apply a first determination signal to the microcontroller unit 110 to maintain the current closed state.

Similarly, the opening / closing determination unit 130 performs a Boolean logarithm (OR) operation using the first open / close signal (for example, 0) and the second detection signal (for example, 1) (For example, 1), the microcontroller unit 110 does not apply the open / close signal for opening the relay 3, and the state of the relay 3 is judged to be forcibly changed to the current open state To cause the microcontroller unit 110 to make a second determination signal to cause the relay 3 to re-open the open state to the closed state.

The microcontroller unit 110 sends a second open / close signal to the relay 3, which can change the open state of the relay 3 to the closed state, when the second determination signal is applied from the open / So that the open state of the relay 3 can be immediately changed to the closed state.

In one embodiment, the operation determining unit 140 determines whether or not the open / close state (open / close state) of the relay 3 is established based on the logic operation result of the set signal and the reset signal of the relay 3 applied from the microcontroller unit 110, And may determine the operation state of the detection unit 120 and then apply an operation determination signal to the open / close state detection unit 120.

More specifically, even when the open / close state of the relay 3 corresponds to either the open state or the closed state in the state where the vehicle 2 is stopped (for example, the start is completely turned off) The relay multi-controller 100 using the logic operation according to the present invention performs NOR operation on the open signal and the close signal of the relay 3 applied from the microcontroller unit 110, A first operation determination signal that can change the operation state of the open / close state detector 120 to an enable state according to a result value, or a first operation determination signal that changes an operation state of the open / close state detector 120 to a disable state The second operation determination signal can be applied to the open /

Accordingly, when the open / close state detecting unit 120 receives the first operation determination signal, the operation state is changed to the enable state to measure the voltage across both ends of the relay 3 and to calculate the voltage difference between both ends, When the determination signal is received, the operation state is changed to the disabled state, so that the both-end voltage measurement of the relay 3 is stopped. This is because unnecessary detection of the open / close state detection unit 120 in the non- This is to prevent power consumption due to operation.

Next, a method of multiplexing a relay through a relay multi-controller 100 using a logical operation will be described.

FIG. 3 is a diagram illustrating a process of sequentially performing a relay multiplexing control method using logical operations according to another embodiment of the present invention.

Referring to FIG. 3, the microcontroller unit first applies a first open / close signal corresponding to a close signal to the relay 3 to change the open / close state of the relay 3 corresponding to the open state to the closed state (S301).

Next, the operation determining unit 140 performs a logic operation on the open signal and the close signal applied from the microcontroller unit, and then performs a logic operation on the first and second operations to enable the open / close state detecting unit 120 to detect the open / close state of the relay 3 By applying a determination signal to the open / close state detecting section 120, the open / close state detecting section 120 detects the open / close state of the relay 3 (S302).

Then, when the relay 3 is closed and the voltage difference between both ends of the relay 3 does not exceed the preset threshold voltage value, the opening / closing state detector 120 generates the first detection signal to determine whether the opening / And outputs the second detection signal to the opening / closing determiner 130 (S303) when the relay 3 is opened and the voltage difference between the both ends of the relay 3 exceeds the preset threshold voltage value, .

Then, the opening / closing determinator 130 determines whether to open or close by performing a Boolean logarithm operation using the first opening / closing signal and the first and second detection signals (S304).

If the output value according to the Boolean logarithmic operation corresponds to a low bit, the opening / closing determinator 130 determines that the relay 3 is in the closed state and maintains the closed state of the relay 3 1 decision signal to the microcontroller unit (S305). If the output value corresponds to a high bit, the opening / closing decision unit 130 determines that the relay 3 is forcibly changed to the current open state, To the closed state, to the microcontroller unit 110 (S306).

Then, the microcontroller unit 110 does not re-apply the separate open / close signal so that the current open / close state of the relay 3 can be maintained in accordance with the received first determination signal (S307) The microcontroller unit 110 re-changes the open / close state of the relay 3 from the open state to the closed state by applying the second open / close signal to the relay 3 (S308).

As described above, the relay multi-control apparatus 100 using the logic operation according to the present invention determines whether or not the relay 3 is in the closed state based on the close signal initially applied to the relay 3 by the microcontroller unit 110, It is possible to judge whether the open state of the relay 3 is intentional or unintentional, and also the relay 3 is quickly re-altered to the closed state by unintentionally opening the state of the relay 3, So that the vehicle 2 can be normally driven and operated.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

100: Relay multiplex control device
110: Microcontroller unit
120: opening / closing state detecting section
121:
122:
123:
130: opening / closing decision unit
140:

Claims (18)

An open / close state detecting unit for detecting an open / close state of a relay whose state is changed by a first open / close signal applied from a microcontroller unit (MCU) and outputting a detection signal; And
And a determination unit for determining whether the relay is open or closed according to a logical operation result of the first open / close signal and the detection signal to output a determination signal,
Wherein the microcontroller unit applies to the relay a second open / close signal for re-opening / closing the relay based on the determination signal.
Relay multiplexing controller using logic operation.
The method according to claim 1,
The open /
A measuring unit for measuring a voltage across the relay;
A calculation unit for calculating a voltage difference between both ends based on the measured voltage between both ends; And
And a generator for generating a detection signal based on the calculated voltage difference between both ends.
Relay multiplexing controller using logic operation.
3. The method of claim 2,
Wherein the generation unit comprises:
Generates a first detection signal corresponding to a low bit when the relay is closed and the voltage difference between both ends does not exceed a predetermined threshold voltage value and outputs the first detection signal to the opening /
And generates a second detection signal corresponding to a high bit and outputs the second detection signal to the opening / closing determination unit if the relay is open and the voltage difference between both ends exceeds a preset threshold voltage value. ,
Relay multiplexing controller using logic operation.
The method of claim 3,
Wherein the open /
And a controller for determining whether to open or close the relay by performing a Boolean logarithm (OR) operation using the first open / close signal and the first detection signal,
Wherein the controller determines whether to open or close the relay by performing a Boolean logarithmic operation using the first open / close signal and the second detection signal.
Relay multiplexing controller using logic operation.
The method of claim 3,
Wherein the open /
And outputs a first determination signal for determining that the relay is in the closed state and maintaining the closed state of the relay when the output value according to the calculation corresponds to the low bit,
And outputs a second determination signal to change the open state of the relay to the closed state when it is determined that the relay open / close state is an open state, when the output value according to the operation corresponds to a high bit.
Relay multiplexing controller using logic operation.
6. The method of claim 5,
The microcontroller unit includes:
When the second determination signal is applied from the open / close determination unit,
And the second open / close signal for allowing the open state of the relay to be changed again to the closed state is applied to the relay.
Relay multiplexing controller using logic operation.
The method according to claim 1,
The relay multi-controller includes:
And an operation determination unit for determining an operation state of the open / close state detection unit and outputting an operation determination signal according to a logical operation result of an open signal and a close signal applied from the microcontroller unit.
Relay multiplexing controller using logic operation.
8. The method of claim 7,
Wherein the operation determining unit
A first operation determination signal for changing the operation state of the open / close state detection unit to an enable state so that the open / close state detection unit can detect the open / close state of the relay; And
And a second operation determination signal for changing the operation state of the open / close state detection unit to a disable state so that the open / close state detection unit does not detect the open / close state of the relay.
Relay multiplexing controller using logic operation.
9. The method of claim 8,
Wherein the operation determining unit
And outputs the first operation determination signal and the second operation determination signal based on the result of the NOR operation.
Relay multiplexing controller using logic operation.
Closing state of the relay whose state is changed by the first opening / closing signal applied from the microcontroller unit (MCU) by the opening / closing state detecting unit and outputting the detection signal;
Determining whether the relay is opened or closed in the open / close state detecting unit according to a logical operation result of the first open / close control signal and the detection signal, and outputting a determination signal;
Applying a second open / close signal to the relay to cause the microcontroller unit to re-open / close the relay based on the determination signal; And
And switching the relay to the closed state by the second open / close signal.
Relay Multiplex Control Method Using Logic Operation.
11. The method of claim 10,
The step of outputting the detection signal includes:
Measuring a voltage across the relay through a measurement unit;
Calculating a voltage difference between both ends based on the measured voltage between both ends through a calculator; And
And generating a detection signal based on the calculated voltage difference across both ends through a generator.
Relay Multiplex Control Method Using Logic Operation.
12. The method of claim 11,
Wherein the generating of the detection signal comprises:
When the relay is closed and the voltage difference between both ends does not exceed a preset threshold voltage value, the generator generates a first detection signal corresponding to a low bit and outputs the first detection signal to the opening / ; And
When the relay is opened and the voltage difference between both ends exceeds a preset threshold voltage value, the generator generates a second detection signal corresponding to a high bit and outputs the second detection signal to the opening / Comprising the steps < RTI ID = 0.0 > of: <
Relay Multiplex Control Method Using Logic Operation.
13. The method of claim 12,
The step of outputting the determination signal includes:
Determining whether the relay is opened or closed by performing a Boolean logarithm (OR) operation using the first open / close signal and the first detection signal in the opening / closing determination unit; And
And determining whether to open or close the relay by performing a Boolean logarithmic operation using the first open / close control signal and the second detection signal in the opening / closing determination unit.
Relay Multiplex Control Method Using Logic Operation.
14. The method of claim 13,
The step of outputting the determination signal includes:
Outputting a first determination signal for determining that the relay is in a closed state and maintaining the closed state of the relay when the output value according to the calculation corresponds to a low bit; And
And outputs a second determination signal to change the open state of the relay to a closed state when it is determined that the open / close state of the relay is in the open state, in the case where the output value according to the operation corresponds to a high bit The method comprising the steps < RTI ID = 0.0 > of: <
Relay multiplexing controller using logic operation.
15. The method of claim 14,
The step of applying the second open / close signal to the relay includes:
And applying a second open / close signal to the relay to cause the microcontroller unit to change the open state of the relay to the closed state when the second determination signal is applied from the open / close determining unit Features,
Relay Multiplex Control Method Using Logic Operation.
11. The method of claim 10,
The relay multiplexing control method includes:
And outputting an operation decision signal by determining an operation state of the open / close state detection unit in an operation decision unit according to a logical operation result of an open signal and a close signal applied from the microcontroller unit.
Relay Multiplex Control Method Using Logic Operation.
17. The method of claim 16,
The step of outputting the operation determination signal includes:
Outputting a first operation determination signal for changing the operation state of the open / close state detection unit to an enable state in the operation determination unit so that the open / close state detection unit can detect the open / close state of the relay; And
And outputting a second operation determination signal that causes the operation determination unit to change the operation state of the open / close state detection unit to a disable state so that the open / close state detection unit does not detect the open / close state of the relay ≪ / RTI >
Relay Multiplex Control Method Using Logic Operation.
18. The method of claim 17,
The step of outputting the operation determination signal includes:
Further comprising: determining an operation state of the open / close state detecting unit based on a result of the NOR operation in the operation determining unit, and outputting the first and second operation determination signals.
Relay Multiplex Control Method Using Logic Operation.

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