JP2008202556A - N-multiplex system autonomous distributed control system for water supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve system reliability by constructing an n-multiplex system autonomous distributed control system in a water supply device using a plurality of pumps driven by a plurality of variable speed driving means. <P>SOLUTION: Inverter main body 1-2 on which microprocessors MCU are mounted, control substrates 1-1, pumps 8-1, and motors 9-1 construct the n-multiplex system. The n-multiplex system is provided with an interface substrate I/O on which the microprocessors MCU are mounted, thereby controlling the operation of the water supply device. In the n-multiplex system, the microprocessors MUC are connected by a communication signal line S, and the control substrates 1-1 have selecting/setting means for selecting/setting a master machine or a slave machine. Only one of the control substrate is set to be the master machine, and the others are set to be the slave machines. The master machine operation-controls itself, and gives operation control instructions of all of the other slave machines. The master machine gives the operation control instructions of all of the other slave machines during operation control or stopping operation control of itself. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an n-fold autonomous distributed control system for a water supply device, and more particularly to a system suitable for performing n-fold autonomous distributed control in a water supply device using a plurality of pumps driven by a plurality of variable speed driving means. .

  As a prior art of a water supply apparatus using a plurality of pumps driven by a plurality of variable speed driving means, there are Patent Document 1 (water supply apparatus), Patent Document 2 (pump apparatus), and the like. In patent document 1, n double system control is also suggested by the double system control of a pump water supply system. The operation control function of the pump is included in the inverter as a program, and the operation failure status is comprehensively monitored by the signal line to send and receive signals, but from the unit that is operating including the failure status to the other unit The re-operation processing command is issued. There is no concept that the controlling body (unit) is fixed because the units are switched. The priority machine to be operated at power-on is set by a parameter. It does not suggest application in n-fold systems.

Patent Document 2 discloses dual system control of a pump water supply system in which an operation control function of a pump is included in an inverter as a program. The control board is dispersed to prevent water breakage, and no n-type system is suggested. The display substrate and the pressure sensor are common, and it is unclear which one issues a command to start the partner pump. In addition, it is unclear which one is mainly performing transmission / reception of signals from the display-required substrate and the pressure sensor.
JP-A-8-93678 Japanese Patent Laid-Open No. 8-100772 Japanese Patent No. 2523139

  However, when an n-fold autonomous distributed control system is constructed using a conventional technique (see Patent Document 3) for a water supply apparatus using a plurality of pumps driven by a plurality of variable speed driving means, the technique of Patent Document 1 Since the main body (unit) to be controlled is not fixed, the control program for execution becomes complicated, and a long time is required for debugging. Moreover, since the machine which controls the whole is changed, the whole system control becomes unstable. The technique of Patent Document 2 does not suggest an n-type system, and it is unclear which one issues a command to start the partner pump. In addition, it is unclear which one is mainly performing transmission / reception of signals from the display-required board and the pressure sensor, and an n-fold autonomous distributed control system cannot be constructed.

  Therefore, an object of the present invention is to construct an n-fold autonomous distributed control system in a water supply apparatus using a plurality of pumps driven by a plurality of variable speed driving means, and to improve system reliability.

  In order to achieve such an object, the present invention provides an inverter main body, a control board, a pump, and a motor, each of which is equipped with a microprocessor, and an interface board equipped with a common microprocessor. In the n-type system that controls the operation of the water supply device, each microprocessor is connected by a communication signal line, and the n-type control board has means for selecting and setting each of the master unit and the slave unit. Only one of the n-layer control boards is set in advance as the master unit and the others are set as slave units. The master unit controls the operation of itself and the operation control command is issued to all other slave units. This is an n-layer autonomous distributed control system.

  In addition, the present invention is an n-type autonomous distributed control system for a water supply apparatus in which the master unit issues an operation control command to all other slave units when its own operation control is performed and when its own operation control is stopped.

  And the present invention, the master machine controls the operation of itself, gives an operation control command to all the other slave machines and performs signal exchange with the interface board, the slave machine is a signal with the interface board It is an n-fold autonomous distributed control system of a water supply device that stops giving and receiving.

  Furthermore, the present invention includes an inverter main body, a control board, a pump, and a motor, each of which is equipped with a microprocessor, and an interface board equipped with a common microprocessor for controlling the operation of the water supply device. In the n-fold system, each microprocessor is connected by a communication signal line, and the n-fold control board has a means for selecting and setting the master unit or the slave unit, respectively. Only one of the control boards is set as the master unit and the others are set as slave units. The master unit controls the operation of itself and issues operation control commands to all other slave units. This is an n-fold autonomous distributed control system for a water supply device in which one of the slave units is shifted to the master unit.

  In addition, the present invention has automatic and manual as the position of the operation switch mounted on the interface board, and when the automatic is selected as the position, the operation control of any one of the above four is performed. When manual is selected as the position, each control board operates independently, performs operation control in response to the key switch operation depressing operation, and stops operation control in response to the key switch stop depressing operation. This is an n-fold autonomous distributed control system for a water supply apparatus.

  The present invention provides means for switching the use condition on the suction side between the water tank method and the main pipe direct connection method, and when the water tank method is selected, operation control corresponding to the water tank method is performed, and the main pipe direct connection is performed. This is an n-fold autonomous distributed control system for a water supply device that performs operation control corresponding to the main direct connection method when a method is selected.

  Furthermore, the present invention provides a means for switching the usage condition on the demand side between the direct feeding method and the elevated water tank method, and when the direct feeding method is selected, operation control corresponding to the direct feeding method is performed, and the elevated water tank method is selected. When it is done, it is an n-fold autonomous distributed control system of a water supply device that performs operation control corresponding to the elevated water tank system.

  According to the present invention, in a water supply apparatus using a plurality of pumps driven by a plurality of variable speed driving means, an n-fold autonomous distributed control system can be constructed to improve system reliability.

The best mode for carrying out the present invention will be described.
An embodiment of an n-fold autonomous distributed control system for a water supply apparatus of the present invention will be described with reference to the drawings.

  Example 1 will be described. A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, an inverter body equipped with a microprocessor, a control board, a pump, and a motor are provided in an n-type system, and the interface board has a unique address and is connected by an n-type communication signal line. Each control board has means for setting a master machine or a slave machine. In advance, only one of the n-layer control boards is set as a master unit and the others are set as slave units. The master unit performs the n-fold autonomous distributed control of the water supply device by controlling all of itself and other slave units.

  FIG. 1 shows a system configuration diagram of the present embodiment. 8-1, 8-2, 8-3 and 8-4 are a plurality of pumps driven by a plurality of motors 9-1, 9-2, 9-3 and 9-4, respectively. No. 1 pump, No. 1 motor, No. 2 pump, No. 2 motor, No. 3 pump, No. 3 motor, No. 4 pump, No. 4 motor will be referred to as the smaller one. The suction side of these pumps is connected to the connection port C of the suction pipe 11 and the connection port B of the water distribution small pipe 6 in the direct connection system, and receives the supply of water from the water main. Further, the water distribution small pipe 6 is provided with a pressure sensor 7, which is used to detect the pressure of the water distribution small pipe 6 to generate an electrical signal and to output a water pressure drop signal. In the water tank method, the water supply from the water tank is received by connecting the connection port A of the water tank water supply pipe 5. In general, the water tank system is provided with two sets of water tanks from the viewpoint of hygiene management. For example, NO. 1 Receiving tank 1-1 has a sterilizer (chemical injection pump) 4-1, an electrode bar 3-1 for detecting the water level of the water tank, and outputting an overflow, drought, and pump inoperability alarm, An inflow valve 2-1 for injecting the water of the pipe into the water tank is provided. NO. 2 The description of the water receiving tank 1-2 is omitted. As with 1 water receiving tank 1-1, an accessory is provided. The discharge sides of these pumps 8-1, 8-2, 8-3, 8-4 are provided with flow switches 10-1, 10-2, 10-3, 10-4, respectively. These are switches that close the internal contact when the amount of water is low, for example, 5 L / min or less, and open the internal contact, for example, when the amount is 10 L / min or more, and provide a signal for stopping the pump when the amount of water is low. Output. 12-1, 12-2, 12-3, 12-4 are check valves, 13-1, 13-2, 13-3, 13-4 and 14-1, 14-2, 14-3, 14 respectively. -4 is a gate valve, 15 is a water supply pipe, and 16 is a pressure sensor that is provided in the water supply pipe 15 and generates an electrical signal in accordance with the pressure. By this sensor, the discharge pressure of the pump is controlled (for example, the discharge pressure is constant and the estimated terminal pressure is constant). Reference numeral 17 denotes a pressure tank, which is provided near the pump of the water supply pipe 15. Furthermore, in the case of the direct delivery type with the connection port D of this water supply pipe 15 terminal, the demand side connects to the demand side water supply pipe E and supplies water to a faucet of an apartment house, for example. In the case of a high water tank type, it is connected to this demand side water supply pipe F to supply water to the high water tank.

  Reference numerals 1-2, 2-2, 3-2, and 4-2 denote inverter bodies that drive the motors 9-1, 9-2, 9-3, and 9-4, respectively. The power supply is supplied from the power supply side via ELB2, ELB3, and ELB4, and includes microprocessors MCU1-2, MCU2-2, MCU3-2, and MCU4-2. Reference numerals 1-1, 2-1, 3-1, 4-1 are control boards, each of which includes a microprocessor MCU1-1, MCU2-1, MCU3-1, MCU4-1, and its own inverter body. Although the details will be described later, when the master unit is set, the control board and the inverter body set to the slave unit under its control are controlled and the signal to the interface board I / O Give and receive. The interface board I / O is supplied with power from the control power circuit breaker CP, and includes a microprocessor MCU4, a display unit SC, a switch unit T, an input terminal and an output terminal. A signal for the pressure sensor, electrode rod, etc. is input, and in response to this signal (water receiving tank, elevated water tank water level), a signal for controlling the opening and closing of the inflow valve is output, and a control signal for stopping the operation of the chemical injection pump is provided. Output. Furthermore, each inverter main body and the control board are connected by communication signal lines S1, S3, S5, and S7, and each control board and the control board and the inverter main body are driven, controlled, and controlled by the aforementioned signal lines. The state is monitored) and the interface I / O board is connected with communication signal lines S2, S4, S6, and S8. For example, RS485 is used for communication control.

  As described above, this embodiment is configured with four sets, but this can be expanded to configure an n-fold autonomous distributed control system. What is important here is that each control board, inverter body, and interface are equipped with microprocessors, which are connected by communication signal lines to exchange information.

  FIG. 2 shows details of the interface board I / O shown in FIG. Key switch group T, switch SW1 for selecting automatic, off, manual, NO. 1 and NO. 2 SW2 for selecting which one of the water receiving tanks to be used (including the electrode rod), NO. 1 and NO. SW3 which selects which inflow valve of 2 water-receiving tanks is used is mounted.

  FIG. 3 is a pump operation characteristic diagram, wherein the horizontal axis indicates the amount of water and the vertical axis indicates the total head. Here, a curve A shows a QH performance curve when one pump is operated at a rotation speed of 100% (corresponding to the max frequency of the inverter). A curve A ′ indicates a QH performance curve at the time of min rotation speed operation. Here, the display of the pump QH performance other than 100% and min rotation speed is omitted. Similarly, curve B is a QH performance curve when two pumps, curve C is three pumps, and curve D is a QH performance curve when four pumps are operated in parallel at 100% rotation speed. Furthermore, curve B ′ shows the QH performance curve when one unit is operated in parallel at 100% and the other unit is operated at the min rotation speed, and curve D ′ similarly shows that three pumps are 100% and the other unit is rotated at min. It is a QH performance curve at the time of carrying out parallel operation by number. The curve C ′ is self-evident from the above description, and thus the description is omitted. Curve E is a pipe resistance curve for valves, pipes, etc. generated when pumping water, and is a target value for controlling the discharge side pressure of the pump. H00 is a target pressure at the point where the amount of water is 0, and is indicated by the intersection of the above-described piping resistance curve E and the QH performance curve A ′ during one pump min rotation speed operation. Similarly, H01 is a target pressure at the time of 100% operation of one pump and at the time of parallel operation with one pump at 100% and another one min rotation speed, and is indicated by the intersection of curve A, curve B ', and curve E. The amount of water at this time is Q1. H04 is the target pressure during parallel operation with four pumps 100%, and the amount of water at this time is Q4. Since H02 and H03 are self-evident from the above description, a description thereof will be omitted. These target pressures are on curve E.

  Hon1 is the starting pressure when the first pump is started from the fully stopped state, Hon2 is the starting pressure when the second unit is additionally started, Hon3 and Hon4 are the third unit and the fourth unit are following starting Is the starting pressure. Next, Hoff4 is the stop pressure for stopping one of the four units, Hoff3 is the stop pressure for stopping one of the three units, and Hoff2 is for stopping one of the two units Stop pressure, Hoff1, is the pressure when the last one stops. Qmin is the pump stop water amount detected by the flow switch. That is, the pump stops when it detects a small amount of water (for example, 5 L / min) during operation of the pump in one unit, but increases the rotational speed to hold the pressure in the pressure tank described above, and stops when it reaches the stop pressure Hoff1. It is. These data are stored in the memory of each control board as pump operation control parameters. The setting can be set by setting means such as a key switch provided on the control board (not shown) or the interface board. These data may be stored in each control board and interface board on which the microprocessor is mounted, or may be stored in any one place.

  FIG. 4 is a flowchart showing the operation control procedure, which is installed in the microprocessor of the control board as a program common to the four pumps. The inverter main body and the interface board are omitted.

  Note that the n-fold autonomous distributed control system referred to here is an n-fold system comprising a pump, a motor, valves, an inverter body, and a control board as a set, and the inverter body and control board are identical to each other. The software is installed and the same function is added. However, the pressure sensor and the interface are common to n overlapping groups. The setting means described above has a means for setting whether it is a master machine or a slave machine, and data in which this master machine or slave machine is set is stored in the parameter group described above. Of course, even one set can be operated independently, and in the n-type system, the slave unit is controlled by the command from the master unit.

  When the power supply side leakage breakers ELB1 to ELB4 and the control power supply breaker CP shown in FIG. 1 are turned on at the start of use, the MCU equipped with the microprocessor executes initial processing and prepares for operation. For example, it is assumed that the first unit (pump 8-1, motor 9-1, inverter main body 1-2, control board 1-1) is set as a master unit, and other units are set as slave units. Each control board is initially processed in step 400 in FIG. 4 and a master unit or a slave unit is confirmed in step 401. In this process, the first machine is determined as the master, and the other cars are determined as the slave machines. The unit set as the master unit executes the processing from step 402 onward, and the unit set as the slave unit executes the processing from step 421 onward. In Step 402, it is determined whether the first car is in operation. If it is determined that the vehicle is in operation, the process jumps to step 407. If not in operation, information is acquired from the interface board (for example, a pressure sensor, a flow switch, an electrode bar, etc.) in the next step 403, and the data is stored. That is, the control board 1-1 sucks up these data through the communication control lines S8, S6, S4, and S2. In step 404, the parameter starting pressure HON1 is called, and this is compared with the feed water pressure (data detected by the discharge side pressure sensor). If the start pressure is not reached as a result of the comparison, the process returns to step 401 to execute the subsequent processing. If the starting pressure has been reached, the process proceeds to step 405, where the spontaneous machine setting process is executed, and the master machine is processed as the first machine at the first time. Thereafter, in step 406, start processing is executed. That is, the control board 1-1 starts the inverter main body 1-2 at a predetermined frequency, for example, Nmin, using the communication control line S 1. Subsequently, a constant pressure control process is executed from step 407 to step 410, and a target pressure update process is executed. In step 411, failure factors are checked for the inverter, motor, and pump in operation. Specifically, there are overload, overcurrent, instantaneous power failure, overvoltage, undervoltage, discharge pressure drop, and the like. If it is abnormal, the routine jumps to step 412 to execute these emergency stop processes, and in step 413, the master machine shift process is executed. If normal, the process proceeds to the next step 415 to check whether the flow switch is operating. As a result, if the amount of water used is small and the contact of the switch is closed, step 419 is executed to execute a pump stop process. In step 420, next engine setting processing is executed, and the process returns to step 401. If this is not working, it means that water is being used, so the process proceeds to step 416, where it is confirmed whether the operation speed is 100%. As a result, if it is less than 100%, the process returns to step 401 and the subsequent processing is continued. If it has reached 100%, the capacity will be insufficient. Therefore, in step 417, it is compared whether the pressure is less than the second following pressure. As a result, if not reached, the process returns to step 401 and the subsequent processing is executed. When the pressure is less than the second follow-up pressure, the process proceeds to step 418, where the processing of the second unit is executed. In the following, increase / decrease in the number of units up to the fourth unit and rotation speed control will be carried out, but the description will be omitted because it is obvious from the above.

  Next, the processing of the slave machine will be described from step 421 onward. Check if there is an operation command from the master unit. If there is, it is confirmed in step 422 whether or not it is in operation. If not, start processing is executed in step 423 and the process returns to step 401. If the result of determination in step 421 is that an operation command has not been issued, it is confirmed in the next step 424 whether operation is in progress. As a result, if the vehicle is in operation, stop processing and next engine setting processing are executed in step 425, and the process returns to step 401. If not, the process returns to step 401 and the subsequent processing is continued. As described above, only one of the n-layer control boards is set as a master machine and others as slave machines, and the master machine controls all of itself and other slave machines.

  As described above, in the n-fold autonomous distributed control system of the water supply apparatus of the first embodiment, the n-fold system is configured by the inverter main body, the control board, the pump, and the motor each equipped with a microprocessor. In the n-fold system of the water supply system that consists of an interface board equipped with a common microprocessor, each microprocessor is connected with a communication signal line, and the n-fold control board is either a master unit or a slave unit. Since there is a means to set, only one of the n-layer control boards is set as the master unit and the others as slave units, and the master unit controls all of itself and other slave units. The structure is simple and the reliability of the entire system can be improved. In addition, the software structure is simplified and the software development man-hours can be reduced. In addition, cost reduction is possible.

  A second embodiment will be described. In the second embodiment of the present invention, in addition to the first embodiment, the slave unit does not transmit / receive signals of the interface board, the master unit controls all of itself and other slave units, and also performs signal transfer of the interface board to supply water. This is a system that performs n-fold autonomous distributed control of devices.

  In the second embodiment, the system configuration is the same as that of the first embodiment (see FIGS. 1 and 2), and in the flowchart of FIG. 4, the routine is processed when the processing after step 401 is set to the master unit. This is a routine to be processed when the processing after step 421 is set to the slave unit, and the slave unit operation control is performed by the processing performed by the master unit after step 401, and step 403 in this step is executed from the interface board. There is information acquisition processing.

  As described above, in the n-type autonomous distributed control system of the water supply apparatus of the second embodiment, in addition to the first embodiment, the slave unit does not transmit / receive the signal of the interface board, and the master unit self and others The control of all slave units and the transmission and reception of signals on the interface board are performed, so the flow of signals can be organized, the hardware and software structures are simplified, and the reliability of the entire system can be improved. The overall cost can be reduced.

  A third embodiment will be described. The system configuration of the present embodiment is the same as that of the first embodiment (see FIGS. 1 and 2), and includes an inverter body equipped with an n-type microprocessor, a control board, a pump, and a motor. It has an address and is connected by n-type communication signal lines, and each control board has means for setting a master machine or a slave machine. In advance, only one of the n-layer control boards is set as a master unit and the others are set as slave units. The master unit controls all of itself and other slave units. If the master unit fails, the master unit is shifted to one of the other slave units, and the water supply excluding the failed unit by this unit Performs n-fold autonomous distributed control of the device.

  About the operation | movement in Example 3, the part which is different from Example 1 is mainly demonstrated. In this embodiment, when the master machine fails, the master machine is shifted to one of the other slave machines. That is, the master unit shift process at the time of failure is executed from step 411 to step 413.

  As described above, in the n-fold autonomous distributed control system of the water supply apparatus of the third embodiment, the n-fold system is composed of an inverter body, a control board, a pump, and a motor each having a microprocessor. In the n-fold system of the water supply system that is composed of an interface board equipped with a common microprocessor, each microprocessor is connected with a communication signal line, and the n-fold control board is set as the master unit or slave unit There is a means, and in advance, only one of the n-layer control boards is set as the master unit and the others as slave units, and the master unit controls all of itself and other slave units and the master unit fails. In that case, the master unit was shifted to one of the other slave units, so system backup Improved reliability and water outage avoidance is further improved.

  Example 4 will be described. The system configuration of the present embodiment is the same as that of the first embodiment (see FIGS. 1 and 2), and the operation switch mounted on the interface board has automatic and manual positions, and automatic is selected as the position. When any of the automatic operation from Example 1 to Example 3 is performed and manual is selected as the position, each control board operates independently, and the operation of the key switch is depressed. The operation control is performed, the operation control is stopped in response to the key switch stop / press operation, and the n-type autonomous distributed control of the water supply apparatus is performed.

  In the n-fold autonomous distributed control system of the water supply apparatus of the fourth embodiment, when the operation switch mounted on the interface board is automatically positioned, any one of the first to third embodiments is automatically operated. When the position is manual, the control board operates independently, and the operation of the key switch is operated by pushing down, and the operation is stopped by pushing down the key switch. Therefore, maintenance is easy and improved.

  Example 5 will be described. The system configuration of the present embodiment is the same as that of the first embodiment (see FIGS. 1 and 2), and means for switching the use condition on the suction side between the water receiving tank system and the main direct connection system is provided. When selected, the operation control corresponding to the water tank method is performed, and when the main direct connection method is selected, the operation control corresponding to the main direct connection method is performed. Performs n-layer autonomous distributed control.

  In the n-type autonomous distributed control system of the water supply apparatus of Example 5, means for switching the use condition on the suction side to the water tank method and the main direct connection method is provided, so it can be used for either method. Sharing becomes high.

  Example 6 will be described. The system configuration of the present embodiment is the same as that of the first embodiment (see FIGS. 1 and 2), and a means for switching the use condition on the demand side (discharge side) between the direct feed method and the elevated water tank method is provided. When the direct feed method is selected, the operation control corresponding to the direct feed method is performed, and when the high water tank method is selected, the operation control corresponding to the high water tank method is performed. Performs n-fold autonomous distributed control of the device.

  In the n-fold autonomous distributed control system of the water supply system of Example 6, means for switching the use condition on the demand side to the direct feed method and the elevated water tank method is provided, so it can be used for both methods and is shared Increases.

The system block diagram which showed the structure of the n multiplex system autonomous distributed control system of the water supply apparatus of an Example. The detailed block diagram of the interface board | substrate in an Example. The driving | operation characteristic figure of the n-fold system autonomous distributed control system of the water supply apparatus of an Example. The flowchart which showed the control procedure of the n layer system autonomous distributed control system of the water supply apparatus of an Example.

Explanation of symbols

1-1, 2-1, 3-1, 4-1 Control board 1-2, 2-2, 3-2, 4-2 Inverter body 8-1, 8-2, 8-3, 8-4 Pump 9-1, 9-2, 9-3, 9-4 Motor I / O interface board S1-S8 Communication signal line

Claims (7)

In an n-type system that controls the operation of the water supply device with an inverter board and a control board, a pump, and a motor, each of which is equipped with a microprocessor, and an interface board equipped with a common microprocessor. ,
Each microprocessor is connected by a communication signal line, and the n-fold control board has a means for selecting and setting each of the master and slave units, and only one of the n-fold control boards is previously set. An n-type autonomous distributed control system for a water supply device, wherein the other master unit is set as a slave unit, the master unit controls the operation of itself and issues an operation control command to all other slave units. In the n-type autonomous distributed control system of the water supply apparatus according to claim 1,
The master unit performs an operation control command to all other slave units at the time of its own operation control and when its own operation control is stopped. In the n-fold autonomous distributed control system of the water supply device according to claim 1,
The master machine controls the operation of itself, issues an operation control command to all other slave machines and performs signal exchange with the interface board, and the slave machine stops signal exchange with the interface board. An n-type autonomous distributed control system for a water supply device. In an n-type system that controls the operation of the water supply device with an inverter board and a control board, a pump, and a motor, each of which is equipped with a microprocessor, and an interface board equipped with a common microprocessor. ,
Each microprocessor is connected with a communication signal line, and the n-fold control board has a means for selecting and setting each of the master and slave units, and only one of the n-fold control boards is previously set. However, if the master unit is set as a slave unit, the master unit controls the operation of itself, issues operation control commands to all the other slave units, and if the master unit fails, one of the other slave units An n-fold autonomous distributed control system for a water supply device, wherein the base is set by shifting to the master unit.   The operation switch mounted on the interface board has automatic and manual positions. When automatic is selected as the position, the operation control according to any one of claims 1 to 4 is performed, and the position is When manual is selected, each control board operates independently, performs operation control in response to a key switch operation depressing operation, and performs operation control stop in response to a key switch stop depressing operation. An n-type autonomous distributed control system for a water supply device. In the n-type autonomous distributed control system of the water supply apparatus according to claim 1,
There is a means to switch the use condition on the suction side between the water tank method and the main direct connection method.When the water tank method is selected, operation control corresponding to the water tank method is performed, and when the main direct connection method is selected. An n-fold autonomous distributed control system for a water supply device, characterized in that operation control corresponding to a main direct connection system is performed. In the n-type autonomous distributed control system of the water supply apparatus according to claim 1,
There is a means to switch the usage conditions on the demand side between the direct feeding method and the elevated water tank method.When the direct feeding method is selected, operation control corresponding to the direct feeding method is performed, and when the elevated water tank method is selected, An n-type autonomous distributed control system for a water supply device, characterized in that operation control corresponding to a water tank system is performed.

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