KR20070013682A - Alternating control unit for driving a plurality of drive-device and driving control system for a plurality of drive-device using the same - Google Patents

Abstract

An alternating controller and a driving control system for operating plural devices are provided to uniformly distribute operation loads on all devices by uniformly operating the devices according to a sequential control mode or a time accumulation mode. A local controller is coupled among a central controller and plural parallel-coupled devices. A communication unit(23) is connected to the central controller via a communication line and communicates with the central controller and an inner controller. The inner controller(24) is connected to the communication unit, receives an operation command and the number of devices to be operated, determines the devices to be operated, and outputs a control signal. Plural operating units are connected to an output unit(27), which selectively drives the operating units according to the control signal. A mode select switch(25) selects one of plural control modes, which are executable in the inner controller. A power source(26) converts an external voltage to an inner operation voltage and supplies the converted voltage to respective components.

Description

Alternating control unit for driving a plurality of drive-device and driving control system for a plurality of drive-device using the same}

1 is a block diagram showing a conventional water supply system,

2 is a schematic diagram showing an operation control system configured by interlocking a plurality of alternating controllers according to the present invention with a central controller;

3 is a configuration diagram of an individual alternating controller according to the present invention;

4A is a flowchart illustrating a process of a sequential control mode performed by an alternating controller in the present invention;

4b is a flowchart illustrating a process of a time integration control mode performed by an alternating controller in the present invention.

<Explanation of symbols for the main parts of the drawings>

9: sensing means 10: central control unit

21a, 21b, 21c, 21d: alternating controller 22: input

23: communication unit 24: control unit

25: mode selection switch 26: power supply

27: output unit 28: display unit

31: external controller 32: manual operation switch

The present invention relates to an alternating controller for driving control of a plurality of drivers and a driving control system of a plurality of drivers using the same, and more particularly, is connected between a plurality of drivers installed in parallel with a central controller performing overall system control. The present invention relates to an alternating controller that performs its own alternating control on drivers according to a signal input from a central controller, and a driving control system configured by interlocking a plurality of alternating controllers with a central controller in order to control the operation of the entire driver.

In today's industrial large equipment, systems, plants, or general large buildings, as the size of the equipment increases, it is common to install and operate a plurality of actuators such as pumps, motors, and cooling systems (air conditioners, outdoor units, etc.).

In particular, a plurality of drivers having the same purpose and function are installed in parallel in the same system, and then these drivers are selectively operated in accordance with the load state. In this case, the central control unit performs a control role of selecting and operating the drivers.

For example, in the case of a large building, a plurality of pumps (powered by electric motors) are provided for each system for normal operation of a water supply system, a drainage system, a cooling system, and a heating system. The centralized pumps are managed by the central control unit.

Hereinafter, an example of the water supply system will be described in more detail.

As shown in FIG. 1, the reservoir 2 is supplied through the water pipe 1 to store water to be pumped to the user. A plurality of reservoirs, for example, five pumps P1 to P5 are installed in parallel to the reservoir. The water of (2) is supplied to the user.

At this time, the operation of all the pumps (P1 ~ P5) is controlled by the central control unit 10, by operating one or two or more selected pumps through the suction pipe (3) and discharge pipe (4) of the water in the reservoir (2) Will be supplied to the user.

The central control unit 10 sets any one of the pumps P1 to P5 as the main pump to be operated initially, and sets the rest as the auxiliary pump to operate the main pump according to the pressure of the discharge pipe 4. If the pressure in the discharge pipe 4 is lower than the set pressure, the auxiliary pumps are operated in sequence.

The pressure of the discharge tube 4 is sensed by the pressure sensor 5, the pressure sensor 5 detects the pressure by the water of the discharge tube 4 and transmits it to the central control unit 10, the central control unit 10 determines the operating number of the pump according to the pressure value transmitted by the pressure sensor (5).

The pressure tank 6 accumulates the discharge pressure, that is, the unused water, when the pressure of the discharge pipe 4 is increased by the pumped water and the pumps P1 to P5 are operated to accumulate even when the pumps are stopped. Water is supplied to the user through the discharge pipe 4 by the pressure.

In addition, in the water supply system, one pump (emergency pump) is additionally configured and installed for standby, and this emergency pump (EP) is a spare pump provided only for emergency operation. Although not operated, the operator operates by hand only when there is a problem in the operation of the pumps P1 to P5 which are normally used.

As such, the water supply system includes a plurality of used pumps (water supply pumps) P1 to P5 and emergency pumps EP installed in parallel, and the drainage system or the cooling / heating system (circulation pump) is also provided. Like the water supply system, a plurality of pumps installed in parallel can be operated.

In addition, when using a plurality of air conditioner outdoor units installed in parallel in the cooling system, this also selects and operates an appropriate number of outdoor units according to the load condition.

However, there are the following problems in a system for operating a plurality of pumps (or motors, air conditioners outdoor units) installed in parallel as described above, and a system having a plurality of drivers installed in parallel in greater detail.

1) There is a problem that the operation is concentrated only on some specific equipment because some of the plurality of actuators are selected and operated in a step where step control is used. As a result, some equipment has a high utilization rate and others have a relatively low rate of operation, which will lead to a high replacement time, which will result in high replacement costs.

2) In case of controlling a plurality of actuators from the central control unit, for example, when pumps of water supply / drainage and cooling / heating system are integratedly controlled from the central control unit to the PLC or PC, the circuit configuration of the central control unit is considerably complicated even if only the minimum function is established Inevitably, this increases the price of the entire system. In addition, the probability of occurrence of unexpected problems such as an operation error increases.

3) In a system that operates an emergency driver, such as a pump system composed of a plurality of used pumps and an emergency pump, the emergency driver does not operate for a long time because it is operated only in an emergency, and is rarely operated. As a result, there is a possibility that the emergency driver will not operate when the actual operation is required.

Accordingly, the present invention has been invented to solve the above problems, and is connected between a plurality of drivers installed in parallel with the central controller performing overall system control and according to the signals input from the central controller. In order to control the operation of the alternating controller that performs the self alternating control and the drivers of the whole system, by providing a driving control system configured by interlocking a plurality of alternating controllers with the central control unit, the entire driver is evenly driven evenly without distinguishing between the standard driver and the emergency driver. The purpose of the present invention is to solve the problems caused by the concentration of the operation, to enable efficient equipment use, and to improve the problem of complicated circuit configuration of the central control unit and the problem of not using the emergency driver for a long time.

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

Alternating controller for operation control of a plurality of drivers according to the present invention,

A local control device which is connected between a central control unit for performing overall system control and a plurality of drivers installed in parallel, performs a self alternating control of the drivers according to a signal input from the central control unit,

A communication unit connected to the central control unit through a communication line and provided for mutual communication between the central control unit and the following inner control unit; When the controller is connected to the communication unit and receives a signal including a driving command and the number of drivers to be actually operated from the central controller, an inner controller which determines the drivers to be operated according to the selected control mode and outputs a control signal for driving the selected drivers. Wow; An output unit configured to connect the drivers so as to generate a contact output for operating the drivers selected by a control signal output from the inner controller; A mode selection switch provided to select one of a plurality of control modes that can be performed by the inner controller; And a power supply unit converting external power into internal working power to supply each component.

On the other hand, the operation control system of a plurality of drivers using an alternating controller according to the present invention,

A plurality of alternating controllers connected between the following central controller and each driver group by using a plurality of drivers installed in parallel as one unit group, the plurality of alternating controllers being connected to each other in a one-to-multiple connection manner; And a central control unit which outputs a signal including a display of an alternating controller requiring a control operation, a driving command, and a quantity of drivers while determining the type of driver and the number of drivers to be operated through the sensing means while performing overall system control. In addition, a specified alternating controller receives a signal output from the central controller to perform the self alternating control for the drivers in the group.

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

The present invention relates to an alternating controller for alternatingly driving a plurality of drivers installed in parallel according to a predetermined control mode, and to an operation control system using the alternating controllers to control the driving of the entire system.

2 is a schematic view showing an operation control system configured by interlocking a plurality of alternating controllers according to the present invention with a central control unit, and FIG. 3 is a block diagram of an individual alternating controller according to the present invention.

First, an alternating control unit (ACU) 21a to 21d is installed in parallel to control an alternating number of drivers P11 to P15, P21 to P31, and P41 to be used for the same purpose. As a type, it is a kind of local control device that is manufactured by modularizing separately so that it can be connected and used between the central control unit 10 and the plurality of drivers.

The alternating controllers 21a to 21d control the drivers in a predetermined control mode, that is, a sequential control mode or a time integration control mode, by the output signal of the central controller 10 performing overall system control. Referring to Fig. 3, the arrangement and function of each component constituting the alternating controller will be described in detail.

The alternating controller 21a according to the present invention has an input unit 22 and a communication unit 23, which are signals input portions, among which the input unit 22 is connected to an external controller 31 or a hand operated switch 32. It can be a component.

Unlike the communication unit 23 which is both an input element and an output element, the input unit 22 receives a signal from the external controller 31 or the hand control switch 32 and transmits the signal to the control unit (internal control unit) 24 in the alternating controller. It is a simple input element, and transmits a signal input from the external controller 31 or the manual operation switch 32 to the inner controller 24 so that alternating control of the drivers P11 to P15 by the inner controller can be performed.

For example, when the quantity of equipment to be actually operated, that is, the quantity of the driver, is input through the input unit 22 according to the driving command and the load state through the signal of the external controller 31 or the manipulation of the manual control switch 32. The controller 24 of the alternating controller 21a recognizes the number of drivers to be operated and selects and operates appropriately the drivers of the quantity input in the sequential control mode or time integration control mode.

The communication unit 23 is an input / output element configured in the alternating controller so that mutual communication (RS-485, RS-232, Ethernet, etc.) can be performed between the central control unit 10 and the alternating controller 21a of the operation control system. The external device, i.e., the PLC or PC 11 of the central control unit 10 and the message received from the connected via the communication line 23a to the control unit 24 in the alternating controller or vice versa, the output signal of the control unit 24 To transmit to the PLC or PC 11 of the central control unit 10.

That is, the communication unit 23 receives a message including the quantity information of the drivers to be operated in the alternating controller 21a from the PLC or PC 11 of the existing central control unit 10 and transmits the message to the control unit 24, On the contrary, when the controller 24 outputs a message including various information such as a response message and a current driver operating state, the controller 24 transmits the message to the PLC or the PC 11 of the central controller 10.

In the connection structure and operation method for interchanging the alternating controller 21a with the PLC or PC 11 side of the existing central control unit 10, the communication unit 23 is a 1-N communication (one-to-multiple connection method) as a connection protocol. RS-485, which basically supports RS-485 communication, enables communication with PLC or PC of the central control unit in the master-slave structure, and optionally RS-232 communication for one-to-one communication. It can also be configured to support Ethernet.

In addition, the communication unit 23 may be configured to communicate various status information, such as the operating state of the drivers (P11 ~ P15) using the internationally recognized Modbus (MODBUS) protocol as a communication protocol.

On the other hand, the alternating controller 21a has a mode selection switch 25 for the operator to operate, which is provided in the outer case of the alternating controller 21a, and the operator selects one of the sequential control mode or the time integration control mode. It is a switch to operate to select.

When the mode selection switch 25 is operated and a signal corresponding to the switch operation is input to the control unit 24, the control unit recognizes the control mode selected by the operator.

In addition, the control unit 24 of the alternating controller 21a controls operation of the corresponding drivers P11 to P15 based on the signals input through the input unit 22 and the communication unit 23, wherein the input unit 22 or When the driving command and the number of drivers to be operated are received through the communication unit 23, the drivers are alternately driven by appropriately calculating the selected control mode.

In addition, the power supply unit 26 of the alternating controller 21a is a component that converts and supplies AC 220V, which is an external power source, to DC 5V, 24V, which is an internal operating power source, and the output unit 27 outputs various kinds of outputs from the control unit 24. The output element is a part where the signals are output and the drivers P11 to P15 are connected, and the contact output for operating the drivers to be actually operated is selected. Although not shown in detail in the drawing, the operating power is selected for each driver for the contact output. It may be configured as a circuit including relays provided to be applied.

That is, when the control unit 24 outputs the relay driving signal to the selected relay in the output unit 27, the corresponding relay is turned on and the selected drivers can be driven by receiving the operating power.

In addition, the alternating controller 21a includes a display unit 28 for displaying information suitable for various operating conditions, and the display unit 28 is driven by a drive signal output from the control unit 24.

At this time, the controller 24 outputs driving signals for displaying various current driving conditions to the display unit 28, and the display unit 28 controls each of the current drivers while driving is controlled by the drive signal of the controller 24. It displays various operation status information such as cumulative operation number, operation integration time, current control mode, current operating driver and its status.

In addition, in addition to providing information through the display unit 28, the control unit 24 of the alternating controller 21a provides various operation state information so that an operator can monitor the operating state of the entire system through the central control unit 10 from the outside. The included signal may be transmitted to the PLC or the PC 11 of the central control unit 10 through the communication unit 23 so that various status information may be provided through the display unit (not shown) of the central control unit 10. .

Meanwhile, in the present invention, the control unit 24 operates the mode selection switch 25 among the sequential control mode and the time integration control mode to control the driving of the drivers P11 to P15 according to a signal input from the central control unit 10. One control mode selected by is performed.

Among these, the sequential control mode is a control mode that selects a driver to be operated based on the number of times each driver is operated when the next driver is to be operated, and the time integration control mode is to operate based on the total time that each driver has been operated. Control mode to select the driver.

4a is a flowchart illustrating a process of a sequential control mode performed by an alternating controller in the present invention, and FIG. 4b is a process of a time integration control mode performed by an alternating controller in the present invention. As a flowchart showing the above, both figures show an example when a control signal for changing the number of operations is input to the input unit 22 or the communication unit 23 of the alternating controller 21a.

First, the process of the sequential control mode will be described with reference to FIG. 4A. In the sequential control mode, the control unit 24 basically calculates and stores the cumulative operating frequency of the driver each time the driving of each driver is started.

When the controller 24 receives the quantity of the driver to be operated through the input unit 22 or the communication unit 23 while no driver is currently operating, the controller 24 accumulates the stored data from the stored data. The control signal for driving from the driver having the fewest frequency is output to the output unit 27.

As a result, the driver is driven by the number of movable input signals. For example, when a signal for operating one driver is input, only one driver having the smallest number of operating cycles is driven, and when a signal for operating two drivers is input. Only two drives are operated from the driver with the lowest cumulative number of operations.

 In addition, as shown in FIG. 4A, when the controller 24 receives a new quantity of drivers to be operated through the input unit 22 or the communication unit 23 while the currently selected driver is operating, the controller ( 24) compares the number of drivers currently being operated with the number of input drivers and outputs a control signal to the output unit 27 for changing the number of movable devices according to the input signal.

In this process, no control is performed if the number of drivers is the same, but if the number of drivers to be operated after the change is larger, the additional driving is performed starting from the driver with the lowest cumulative operating frequency among the drivers that are not currently operating from the stored data. The control signal for outputting is output to the output unit 27.

However, if the number of drivers to be operated after the change is smaller than the number of drivers currently in operation, the controller outputs a control signal to the output unit 27 to stop from the driver having the highest cumulative operating frequency among the drivers currently being operated. Done.

As a result, the driver is driven as many as the number of input signals. For example, when a signal for operating four drivers is newly input when two drivers are currently operating, the driver with the lowest number of accumulated operation times among the drivers not being operated is input. If two additional driving is performed, while a signal for operating two driving apparatuses is newly input when four driving apparatuses are currently operating, two driving apparatuses with the highest cumulative operating frequency are stopped.

This control process is repeatedly performed whenever a new signal is input through the input unit or the communication unit.

Next, the process of the time integration control mode will be described with reference to FIG. 4B. In the time integration control mode, the control unit 24 basically drives the controller 24 by counting the time from the start of the drive to the end of the drive for each driver. The time is stored as data, and at the same time, the final cumulative driving time obtained by adding this driving time to the cumulative driving time until the previous driving is stored as data.

As such, the accumulated driving time stored for each driver, that is, operation integration time, is used as data for selecting a driver to be operated afterwards.

That is, when no driver is currently being operated and the controller 24 receives the quantity of drivers to be operated through the input unit 22 or the communication unit 23, the controller 24 accumulates driving from the stored data. The control signal for driving from the driver having the least time is output to the output unit 27.

As a result, the driver is driven by the number of movable input signals. For example, when a signal for operating one driver is input, only one driver having the smallest operation integration time is driven, and a signal for operating two drivers is input. Only two drivers are driven from the driver with the smallest operation integration signal.

In addition, as shown in FIG. 4B, when the controller 24 receives a new quantity of drivers to be operated through the input unit 22 or the communication unit 23 while the currently selected driver is operating, the controller ( 24) compares the number of drivers currently being operated with the number of input drivers, and outputs a control signal to the output unit 27 for changing the number of drives of the driver according to the input signal.

In this process, no control is performed if the number of drivers is the same, but if the number of drivers to be operated after the change is larger, the additional drive starts from the driver with the lowest integration time among the drivers that are not currently operating from the stored data. The control signal for outputting is output to the output unit 27.

However, if the number of drivers to be operated after the change is less than the number of drivers currently operating, the controller outputs a control signal to the output unit 27 to stop from the driver having the most operation integration time among the drivers currently operating. do.

As a result, the driver is driven by the number of movable input signals. For example, when a signal for operating four drivers is newly input when two drivers are currently operated, the driver with the least operation integration time among the drivers that are not in operation is the least. If two additional driving units are operated, and a signal for operating two driving units is newly input when four driving units are in operation, two driving units with the highest driving integration time are stopped.

This control process is then repeatedly performed whenever a new signal is input through the input unit 22 or the communication unit 23.

Hereinafter, a configuration of a system for driving and controlling a plurality of drivers using an alternating controller made as described above will be described with reference to FIG. 2.

In the operation control system according to the present invention, a plurality of alternating controllers 21a to 21d may be used to control the operation of the plurality of drivers, and the drivers P11 to P15, P21 to P31 to P41 of the entire system to be operated. After dividing ~) into several groups, a plurality of drivers constituting a group can be alternately controlled by one alternating controller.

First, a plurality of drivers that are installed in parallel and can be selectively operated while being used for the same purpose are classified into the same group, and the drivers constituting each group are output parts of the same alternating controllers 21a to 21d (FIG. 3). (27), one alternating controller can control the actuators in the group.

At this time, even if the driver of the same use that can be classified into the same group, if the number is large, it can be classified into several sub-groups, one alternating controller can be used for each sub-group.

Then, the communication unit (reference numeral 23 in FIG. 3) of the alternating controllers 21a to 21d installed in each group is connected to the PLC or the PC 11 of the central control unit 10 so as to be interoperable with each other (FIG. 2). Reference).

For example, when applying to a pump system of a large building, the water supply pumps P11 to P15 installed in parallel in the water supply system are classified into a first group (different uses of water supply pumps are classified into different groups). The drainage pumps (P21 ~) installed in parallel are classified into the second group, the cooling circulation pumps (P31 ~) installed in parallel in the cooling system as the third group, and the heating circulation pumps (P41 ~) installed in parallel in the heating system as the fourth group. Then, in order to alternately control the pumps of each group, one alternating controller 21a to 21d for each group is installed in connection with the pumps in the group, and the alternating controllers 21a to 21d are communicated to the central control unit 10. Connect as much as possible.

In addition, even if the water supply pumps of the same use installed in parallel can be operated dozens of water supply pumps on the entire floor of the building, by classifying them appropriately into several groups and connecting one alternating controller to each group, the alternating controllers to the central control unit Can be connected to enable communication.

Thus, the operation control system of the present invention for controlling the operation of the plurality of drivers, the drivers (P11 ~ P15, P21 ~, P31 ~, P41 ~) in the group in accordance with the message received from the central control unit 10 alternately The alternating controller 21a to 21d to control the alternating controller, and the alternator requiring the control operation in the state of determining the driver type (group-by-group) and the number of driver operating units to be connected and operated in communication with the alternating controllers 21a to 21d. It includes a central control unit 10 for transmitting a message including the display of the controller, the drive command and the number of actuators.

Here, the PLC or PC 11 of the central control unit 10 does not directly control the operation of the drivers, unlike the prior art, and transmits a driving command and a moving number signal to the corresponding alternating controllers 21a to 21d to provide the alternating controller. Allow alternating control of the drivers.

However, the central control unit 10 determines the number of actuators to be operated through the sensing means 9 is the same as in the prior art, in which case the sensing means 9 is a pump of the water supply system of the discharge pipe It can be a pressure sensor, or a temperature sensor if the actuator is an air conditioner outdoor unit in a cooling system.

When the alternating controllers 21a to 21d receive a driving command from the central controller 10, the control unit 24 determines the drivers to be operated in the group according to the control mode and drives the selected drivers according to the control mode. As a result, the actuators are operated in accordance with the number of actuator movable units received from the central controller 10.

At this time, the alternating controllers 21a to 21d are inputted in the sequential control mode or time integration control mode by signals input through the communication unit 23 from the PLC or PC 11 of the central control unit 10 as described above. The actuators are selected and operated.

In the above process, the PLC or PC 11 of the central control unit 10 should select specific alternating controllers 21a to 21d according to the type of driver to be operated, and transmit a signal including a driving command and the number of driver operating units. Alternatively, the PC 11 outputs a message including an indication of an alternating controller requiring a control operation, that is, a message including an address of an alternating controller to be operated in a state where an address (address) is specified for each alternating controller 21a to 21d. It is supposed to output.

When the PLC or PC (master) 11 transmits a message to all the alternating controllers (slaves) 21a to 21d, it operates when the alternating controllers are identical with their own addresses, and the alternating controller is a message given to it. Send a response message for.

For example, in the second group of FIG. 2, if the current drivers P21 to 1 are in operation or change them to two in the PLC or the PC, the PLC or the PC of the central controller 10 according to the transmission method between the Modbus networks. An example of the message structure transmitted in (11) is shown in Table 1 below.

When the message shown in Table 1 is transmitted from the PLC or the PC 11, all the alternating controllers 21a to 21d receive the same message, but only the second alternating controller (Address: 02) 21b that is the same as its own address is operated. The second alternating controller 21b transmits a success message if the operation succeeds as a response message and a failure message to the PLC or PC 11 if the operation is successful.

In the message, the CRC portion is briefly described. In order to confirm whether the data received by the receiver is the same as the data sent by the transmitter, a value calculated by calculating a portion of the transmitted data is put in the CRC portion. In this way, if the receiving side calculates the corresponding part again and the same value is found, it is regarded that the received data matches the transmission data, and if it is wrong, the request for retransmission of the command is requested (CRC part is changed every time according to the content of the data). .

Table 2 below shows an example of the structure of the response message output from the second alternating controller 21b.

In this way, in the operation control system according to the present invention, the display, the drive command and the number of drivers of the alternating controllers 21a to 21d requiring the control operation in the state where the driver 10 and the number of drivers to be operated are determined by the central controller 10. When the included signal is outputted, the selected alternating controller receives a signal from the central control unit and performs a control operation according to the sequential control mode or time integration control mode to operate the required number of drivers.

As described above, according to the alternating controller for the operation control of the plurality of drivers according to the present invention and the operation control system of the plurality of drivers using the same, the following effects are obtained.

1) In the past, there was a problem that the operation is concentrated only on some specific equipment, but according to the present invention, the entire driver is evenly alternated in the sequential control mode or the time integration control mode without the distinction between the standard driver and the emergency driver. Increased replacement costs, etc.) can be eliminated, enabling efficient equipment use.

2) By distributing the control functions for the drivers of the entire system to individual alternating controllers, the circuit configuration of the central control unit is simplified, and the probability of occurrence of unexpected operation errors can be reduced.

3) In the case of the conventional emergency driver, there was a possibility that it does not operate at a time when it is actually necessary to operate due to the non-use for a long time, but in the present invention, since the emergency driver is used together, problems caused by the non-use for a long time can be solved, and it can be used by operating the emergency driver. The whole system can be used longer.

Claims (9)

A local control device which is connected between a central control unit for performing overall system control and a plurality of drivers installed in parallel, performs a self alternating control of the drivers according to a signal input from the central control unit, A communication unit connected to the central control unit through a communication line and provided for mutual communication between the central control unit and the following inner control unit; When the controller is connected to the communication unit and receives a signal including a driving command and the number of drivers to be actually operated from the central controller, an inner controller which determines the drivers to be operated according to the selected control mode and outputs a control signal for driving the selected drivers. Wow; An output unit configured to connect the drivers so as to generate a contact output for operating the drivers selected by the control signal output from the inner controller; A mode selection switch provided to select one of a plurality of control modes that can be performed by the inner controller; A power supply unit converting external power into internal working power to supply each component; Alternating controller for operation control of a plurality of drivers, characterized in that it comprises a. The method according to claim 1, The inner controller is a sequential control mode in which the driver with the lowest number of cumulative operation times starts or stops from the driver with the highest cumulative number of operation times according to the number of input drivers, and the driving or driving integration time is highest from the driver with the smallest operation integration time. An alternating controller for operating control of a plurality of drivers, characterized in that the alternating control is performed in one control mode selected from the time integration control mode for stopping from many drivers. The method according to claim 1, The display unit may further include a display unit which displays various operation state information including the cumulative operating frequency and driving integration time for each current driver, the currently selected control mode, the currently operating driver, and the state according to the driving signal output by the controller. Alternating controller for driving control of a plurality of drivers. The method according to claim 1, And an input unit connected to the inner control unit and connected to an external controller or a manual operation switch, and separately inputting a signal including a driving command and an actual number of drivers to be operated, wherein the inner control unit is input through the input unit. An alternating controller for driving control of a plurality of drivers, characterized in that to perform alternating control of the drivers according to the signal. A plurality of alternating controllers connected between the following central controller and each driver group by using a plurality of drivers installed in parallel as one unit group, the plurality of alternating controllers being connected to each other in a one-to-multiple connection manner; A central control unit which outputs a signal including an indication of an alternating controller requiring a control operation, a driving command, and a quantity of drivers while determining the type of driver and the number of drivers to be operated through the sensing means while performing overall system control; It is configured to include, And a designated alternating controller receives a signal output from the central controller to perform self alternating control of the drivers in the group. The method according to claim 5, The alternating controller, A communication unit connected to the central control unit through a communication line and provided for mutual communication between the central control unit and the following inner control unit; When the controller is connected to the communication unit and receives a signal including a driving command and the number of drivers to be actually operated from the central controller, an inner controller which determines the drivers to be operated according to the selected control mode and outputs a control signal for driving the selected drivers. Wow; An output unit configured to connect the drivers so as to generate a contact output for operating the drivers selected by a control signal output from the inner controller; A mode selection switch provided to select one of a plurality of control modes that can be performed by the inner controller; A power supply unit converting external power into internal working power to supply each component; Operation control system of a plurality of drivers using an alternating controller, characterized in that it comprises a. The method according to claim 6, The internal control unit of the alternating controller is a sequential control mode in which the driver with the lowest cumulative operation number starts or stops from the driver with the highest cumulative operation number according to the number of drivers inputted, and the driving or operation integration from the driver with the smallest operation integration time. An operation control system for a plurality of drivers using an alternating controller, characterized in that the alternating control is performed in one of the control modes selected from the time integration control mode of stopping the driver having the most time. The method according to claim 6, The display unit further includes a display unit for displaying various operation state information including the cumulative number of operation for each current driver and the operation integration time, the currently selected control mode, the currently operating driver, and the state according to the drive signal output from the controller. Operation control system of a plurality of drivers using an alternating controller, characterized in that. The method according to claim 6, The alternating controller may further include an input unit connected to an internal control unit, and an external controller or a manual operation switch may be connected to separately input a signal including a driving command and an actual number of drivers to be operated. Operation control system of a plurality of drivers using an alternating controller, characterized in that to perform alternating control of the drivers in accordance with the signal input through.

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