WO2005073639A1

WO2005073639A1 - Facility control device

Info

Publication number: WO2005073639A1
Application number: PCT/JP2004/019500
Authority: WO
Inventors: Toshiro Ino; Takashi Kawagishi
Original assignee: Daikin Industries, Ltd.
Priority date: 2004-01-05
Filing date: 2004-12-27
Publication date: 2005-08-11
Also published as: JP2005195208A; JP3690412B2

Abstract

There is provided a control device capable of operating a facility such as a VAV with a high reliability. A facility control device is connected to a facility management device of an upper node by a predetermined facility network communication line and controls a facility. The control device includes a first communication connection unit, a second communication connection unit, a reception unit, a device control unit, and an information failure judgment unit. For a predetermined period of time after the power is turned on, the information failure judgment unit judges whether the necessary control information received by the reception unit is abnormal. When the necessary control information is judged to be abnormal in the information failure judgment unit after the predetermined period of time has elapsed, the device control unit controls the facility according to alternative control information after a predetermined period of time has elapsed.

Description

Specification

Equipment control equipment

Technical field

The present invention relates to a control device for equipment.

Background art

Recently, an air conditioning system as shown in FIG. 3 has been proposed (see, for example, Japanese Patent Application No. 2003-100265).

The air conditioning system shown in Fig. 1 mainly consists of a central monitoring panel for building management (upper system) 12, an air handling unit (hereinafter abbreviated as air handling) 14, and a VAV (Variable Air Volume) 16 Consists of The building management central monitoring panel 12 and the air han 14 are connected via an open-net compatible communication line 10, and the VAV 16 is connected to the air han 14 via a local communication line 20.

Disclosure of the invention

Problems to be solved by the invention

[0003] It is an object of the present invention to provide a control device capable of operating equipment such as a VAV with high reliability in an air conditioning system as shown in FIG. Means for solving the problem

[0004] The equipment control device according to the first invention is a control device that is connected to a higher-level equipment management device by a communication line of a predetermined equipment network and controls the equipment, and includes a first communication connection. Unit, a second communication connection unit, a reception unit, a device control unit, and an information abnormality determination unit. The first communication connection unit is a connection unit for performing the first communication with the equipment management device, and corresponds to the equipment network. The second communication connection unit is a connection unit for performing the second communication with the equipment, and corresponds to the equipment network. The receiving unit receives essential control information, which is information necessary for controlling the equipment, from the equipment management device via the first communication connection and from the equipment via the second communication connection. The equipment control unit controls the equipment based on the essential control information. The information abnormality determining unit determines whether the essential control information received by the receiving unit is abnormal for a predetermined time after the power is turned on. And When the information abnormality determination unit determines that the essential control information is abnormal after a predetermined time has elapsed, the equipment control unit controls the equipment based on the substitute control information after the predetermined time has elapsed. Here, the “alternative control information” refers to control information prepared as an alternative to the essential control information. The term “power on” as used herein includes not only when power is turned on, but also when power is restored after a power failure.

[0005] Here, the information abnormality determining unit determines whether the essential control information received by the receiving unit is abnormal for a predetermined time after the power is turned on. When the information abnormality determination unit determines that the essential control information is abnormal, the device control unit controls the equipment based on the alternative control information prepared as a substitute for the essential control information. For this reason, even if an abnormality occurs in the equipment management device or equipment, the equipment can be operated. In addition, the control device does not start the normal operation unless the essential control information is determined to be normal. Therefore, the present control device can perform lean and reliable control on the equipment without erroneous determination. As a result, the control device can operate the equipment with high reliability.

The invention's effect

[0006] The equipment control device according to the first invention can operate the equipment with high reliability.

Brief Description of Drawings

FIG. 1 is a schematic diagram of an air conditioning system and a building network system including a controller according to an embodiment of the present invention.

[Figure 2] Schematic diagram of the instrumentation block of the air conditioning system.

FIG. 3 is a schematic diagram of a conventional air conditioning system on a building network system.

圆4] equipment management device and Do not be able to communicate! /, Take the supply air temperature setting data of the case handled! /, Full opening represents the '~ Chiya ¹ to me.

Explanation of symbols

[0008] 10 LonWorks Network Communication Line

12 Equipment management equipment

16 VAV (Equipment) 20 Local communication line (dedicated line)

31 Controller (control device)

31a Upper communication connection port (1st communication connection)

31b Local communication connection port (second communication connection)

32 Communication unit (Reception unit)

33 Device control section

34 Information abnormality judgment unit

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] Configuration of air conditioning system>

FIG. 1 and FIG. 2 show an air conditioning system 13 including a plurality of facility equipment including a controller 31 according to an embodiment of the present invention. The air conditioning system 13 is a package system in which the air han 14, the VAV 16 and the exhaust fan 51 are packaged in one package, and the controller 31 in the air han 14 can complete the control in the pack. For this reason, it is possible to reduce construction costs such as trial run adjustment when connecting to the BAS (building 'automation' system), which is a higher system. The controller 31 of the air conditioning system 13 is connected to a host system via a LonWorks network.

The air han 14 is an air conditioner unit having a main function of cooling and warming the air supplied to the VAV 16 by obtaining cold water or hot water with a heat source power (not shown), and also having a humidifying function. The air han 14 includes a cooling unit 41, a heating unit 42, and a humidifying unit 43. Cooling water having a flow rate adjusted by the cold water knob 44 flows through the cooling unit 41. Hot water having a flow rate adjusted by a hot water valve 45 flows through the caro heat section 42. The humidifying section 43 has a plurality of nozzles, and sprays the steam adjusted by the humidifying valve 46.

[0010] Further, a controller 31 for controlling the valves 44, 45, 46, the fans 47, 51, and the dannos 48, 49, 52 of the air han 14 is arranged in the air han 14. The controller 31 includes a device control unit 33, a communication unit 32, and an information abnormality determination unit 34. The device control unit 33 controls a VAV damper 62 via a VAV controller 61 of a VAV 16 described later. The communication unit 32 receives room temperature data and the like from the VAV 16. The information abnormality judging section 34 stores various data values (supply air temperature setting value, supply air dew point temperature setting value, outside air , The outside air measurement humidity value, the VAV room measurement temperature value, the VAV required airflow value, and the VAV measurement airflow value) are within the normal range.

An air supply fan 47 for sending the air conditioned by the cooling unit 41, the heating unit 42, and the humidifying unit 43 to the VAV16, and an exhaust fan 51 for exhausting power from rooms 80, corridors, toilets, etc. Inverter control by 31. In addition, the amount of exhaust air is controlled by the outside air introduction damper 48 for introducing outside air, the return air damper 49 installed in the duct that returns the air in the room 80 to the upstream side of the cooling section 41, etc., and the upstream side of the exhaust fan 51. The opening degree of the exhaust damper 52 to be adjusted is also adjusted by the controller 31 in various controls described below.

[0011] The VAV 16 is equipment that adjusts the amount of the air-conditioned air sent by the air supply fan 47 in the air hank 14 and blows the air into the room 80. Here, a plurality of VAVs 16 are connected to one air handling machine 14. The VAV 16 includes a VAV controller 61, a VAV damper 62, a temperature sensor 63, an air flow sensor (not shown), and the like. The VAV controller 61 is connected to the controller 31 via the local communication line 20, and adjusts the opening of the VAV damper 62 in response to a command from the controller 31 and controls the state of the VAV damper 62 and the like. Or send it to The connection between the VAV controller 61 and the controller 31 will be described later in detail.

The controller 31 in the air han 14 transmits control data to the VAV controller 61 and receives monitoring data transmitted from the VAV controller 61. The control data includes a start / stop command, a room temperature setting, a cooling / heating mode command, and the like. The monitoring data is data such as the indoor measurement temperature, VAV status, VAV required airflow, VAV measurement airflow, and VAV opening status.

[0012] In addition to the controller 31, the status data is transmitted from the respective knobs 44, 45, 46, the respective dunnos 48, 49, 52, the fans 47, 51, and the controller 31 is also provided in the air handling unit 14. Predetermined data is sent from a differential pressure switch, dew point temperature transmitter, thermistor, humidity sensor, etc. (not shown). Based on these data, in the following various controls, the controller 31 sends control command data to the valves 44, 45, 46, the dampers 48, 49, 52, the fans 47, 51, and the VAV controller 61. [Various controls by controller 31]

The controller 31 performs supply air temperature control, supply air dew point temperature control, warm-up control, supply air flow control, supply air load reset control, outside air cooling control, and the like in the air conditioning system 13. After being connected to the higher-level equipment management device 12 via the LonWorks network communication line 10 and the gateway 12a as described later, the controller 31 performs various controls according to instructions from the equipment management device 12. Even in a state where the controller 31 is not connected to the upper system, the controller 31 can independently execute various controls. In this case, various controls are executed in accordance with an operation input to the controller 31 from a remote controller (not shown).

In the supply air temperature control, PID control of the cold water valve 44 and the hot water valve 45 is performed according to the supply air temperature. In the supply air dew point temperature control, PID control of the humidification valve 46 is performed based on the supply air dew point temperature, and humidification is prohibited at low temperatures. In the warm-up control, the pre-cooling Z pre-heating is performed at the time of startup, so that the outside air damper 48 and the exhaust damper 52 are closed. In the supply air volume control, the required air volume is calculated by summing the air volume setting values of each VAV16, and the rotation speed of the air supply fan 47 is controlled based on the required air volume. Further, the rotation speed of the air supply fan 47 is appropriately corrected based on the opening degree of the VAV 16. In the air supply temperature load reset control, the air supply temperature set value is automatically changed from the control state of each VAV 16 (air flow set value · indoor temperature) and the control state of each part of the air han 14. In outside air cooling control, when it is effective to take in outside air, proportional control of each damper is performed based on the supply air temperature.

[0014] Connection between controller 31 and VAV controller 61 in air handling unit>

The VAV controller 61 includes a communication IC corresponding to a LonWorks network called a “neuron chip”, and is connected to the local communication line 20 by a connection port 61a using a network function of the communication IC. In other words, VAV16 is equipment that supports the LonWorks network, which is becoming an international standard for open control networks.

The local communication line 20 is a twisted pair cable extending from a local communication connection port 3 lb of the two connection ports 31a and 31b of the controller 31. Communication using the local communication line 20 is based on the LonTalk protocol. Therefore, V AV16 can be adopted by any manufacturer, as long as it supports the LonWorks network.

[0015] The controller 31 has the local communication connection port 3lb described above separately from the upper communication connection port 31a for communication with the upper system. Therefore, the VAV 16 is locally connected to the controller 31 in the air han 14 without passing through the communication line 10 of the LonWorks network of the BAS, and together with the air han 14, constitutes a one-packaged air conditioning system 13. .

The air conditioning system 13 including the controller 31 can independently control and monitor the air han 14 and the VAV 16 as described above, but it is one of many subsystems from the viewpoint of a higher-level system called BAS. The BAS is an open system using the technology of the LonWorks network.A plurality of subsystems such as an air conditioning system 13 and a facility management device 12 for building management are connected to a communication line 10 via a gateway 12a. Configuration. The subsystems such as the air conditioning system 13 are controlled and monitored by the facility management device 12.

[0016] The controller 31 of the air conditioning system 13 is connected to the communication line 10 of the LonWorks network by a higher-level communication connection port 31a for communication with a higher-level system. The upper-layer communication connection port 3 la is a connection port that uses the network function of the communication IC corresponding to the LonWorks network, similar to the connection port 31 b for the local communication and the connection port 61 a of the VAV controller 61 described above. The controller 31 connected to the equipment management apparatus 12 via the communication line 10 and the gateway 12a by the upper communication connection port 31a exchanges the following information with the equipment management apparatus 12.

First, the controller 31 receives a command to the air han 14 or the VAV 16 sent from the equipment management device 12 (see a white arrow 91 in FIG. 1). Specific commands include a start / stop command of the air han 14, a warm-up command, a supply air temperature setting command, a supply air dew point temperature setting command, an outside air cooling command, and a room temperature measurement command. Upon receiving such a command, the controller 31 controls the air han 14 and the VAV 16 and collects necessary monitoring data. [0017] The controller 31 transmits monitoring data relating to the status and settings of the air han 14 and the VAV 16 to the equipment management device 12 (see a white arrow 92 in FIG. 1). Specifically, the operation mode state, air supply fan operation state, air supply fan alarm state, air supply inverter output, air supply temperature measurement value, return air damper opening, chilled water valve opening, indoor measurement temperature, VA V Status and other monitoring data.

The controller 31 has a control board (not shown). An EEPROM is provided on the control board. In this EEPROM, the operation of the air conditioning system 13 immediately before the power supply to the controller 31 is turned off or immediately before the power outage Z stop state data, air supply temperature setting value, warm-up permission Z inhibition state data, schedule setting state data, and air supply temperature load Reset enabled Z prohibited state data is stored and saved. The warming-up permission Z prohibition state data is data indicating permission Z prohibition of the warm-up control. The supply air temperature load reset permission Z prohibition state data is data indicating permission z prohibition of the supply air temperature load reset control.

<State of Air Conditioning System at Controller Power-On or Power Failure Recovery> A power-on Z power failure restoration operation setting switch is provided on the control board of the controller 31. When the power-on Z power failure recovery operation setting switch is set to ON in advance, the controller 31 reads various data stored in the EEPROM when the power is turned on or when the power is restored, and immediately before the power is turned off. Or, recover just before the power failure. In other words, when the operation Z stop state data is the operation state immediately before the power is turned off or immediately before the power failure, the controller 31 returns to the operation state when the power is turned on or when the power is restored after the power failure. In addition, if the operation Z stop state data is in the stopped state immediately before the power is cut off or immediately before the power failure, the controller 31 returns to the stopped state when the power is turned on or when the power is restored. On the other hand, if the power-on Z power failure recovery operation setting switch is set to OFF, the controller 31 stores data other than the operation Z stop status data stored in the EEPROM when the power is turned on or when the power failure recovers. And always return to the stopped state.

[0019] <Control of air conditioning system after power-on of controller or after restoration of power failure> When the controller 31 returns to the operation state after turning on the power or after a power failure, or when receiving an operation command after the power is turned on or after a power failure, the controller 31 performs only the ventilation operation to the air conditioning system 13 for a predetermined time TP. Let The controller 31 receives various data transmitted from the facility management device 12 and the VAV controller 61 within the predetermined time TP, and receives all data values required for the operation of the air conditioning system 13. Is within the normal range specified in advance. If it is determined that all the data values are within the normal range at the elapse of the predetermined time TP, after the elapse of the predetermined time TP, the controller 31 executes the air conditioning system by various control methods as usual. Control 13 operations. On the other hand, if it is determined that any of the data values is not within the normal range at the elapse of the predetermined time TP, after the elapse of the predetermined time TP, the controller 31 operates the air conditioning system 13 by the limited control method. Control.

[0020] [Limited control method]

(When there is an error in communication with the equipment management device)

The controller 31 determines that one of the data values of the operation Z stop state data, supply air temperature setting data, supply air dew point temperature setting data, outside air measurement temperature data, and outside air measurement humidity data is not within a predetermined normal range. Is determined, the facility management device 12 is notified of the occurrence of the abnormality. Thereafter, the controller 31 cancels the abnormality when all of these data values fall within the normal range. Note that the initial value of the above data is Invalid, and this Invalid value is considered to be outside the normal range.

The controller 31 automatically determines the supply air temperature set value when the power is turned on or when the power is restored, and holds the set value until a predetermined time TP elapses. If the supply air temperature set value does not fall within the normal range before the predetermined time TP elapses, the controller 31 determines the supply air temperature set value according to the flowchart shown in FIG.

In FIG. 4, when the controller 31 starts the operation of the air conditioning system 13, in step S 21, the state of the controller 31 power supply air temperature load reset permission Z inhibition state data is confirmed. Note that when the power is turned on, if the operation setting switch for power failure and power recovery is set to ON, the air supply temperature load reset of EEPROM is enabled. Equipment management equipment 12 Supply air temperature load reset permission Z prohibited state data is referred to. If the result of the check in step S21 indicates that the air supply temperature load reset permission Z prohibited state data is in the permitted state, the process proceeds to step S23. If the result of the check in step S21 shows that the supply air temperature load reset permission Z prohibited state data is in the prohibited state, the process proceeds to step S22. In step S22, the controller 31 reads the air supply temperature load reset permission Z inhibition state data as the permission state. In step S23, the controller 31 automatically determines the supply air temperature setting value. Then, the controller 31 performs a supply air temperature load reset process thereafter.

If the supply air temperature setting value from the equipment management device 12 falls within the normal range on the way and the supply air temperature load reset permission Z inhibition state data is in the inhibition state, the controller 31 In accordance with the supply air temperature setting. Also, in step S21, it is confirmed that the air supply temperature inlet reset is permitted.Z prohibition state data is prohibited, and the air supply temperature set value from the equipment management device 12 falls within the normal range on the way, and the air supply temperature load reset. If the permission Z prohibition state data is the permission state, the controller 31 continues the air supply temperature load reset processing as it is. Also, in step S21, it is confirmed that the supply air temperature load reset permission Z prohibition state data is in the permission state, and the supply air temperature load reset permission Z prohibition state data is changed from the permission state to the prohibition state on the way. The controller 31 continues the supply air temperature load reset process even if the supply air temperature set value of the controller 31 is out of the normal range.

The controller 31 unconditionally prohibits the humidification control if the supply air dew point temperature set value does not fall within the normal range before the predetermined time TP elapses. Then, after that, when the supply air dew point temperature set value falls within the normal range and all the humidification conditions are satisfied, the controller 31 starts the humidification control.

The controller 31 unconditionally prohibits the outside air cooling control if either the outside air measurement temperature value or the outside air measurement humidity value does not fall within the normal range before the predetermined time TP elapses. After that, if all the data values fall within the normal range and satisfy all the outside air cooling conditions, the controller 31 starts the outside air cooling control.

(If there is an error in communication with the VAV controller)

The controller 31 sets the VAV room measured temperature value and VAV required value until the predetermined time TP elapses. If any of the air flow rate value and the VAV measurement air flow value do not fall within the normal range, the VAV 16 is regarded as abnormal and is excluded from the control target. At this time, the controller 31 notifies the facility management device 12 of the occurrence of the abnormality. Thereafter, the controller 31 cancels the abnormality when all of these data values fall within the normal range. If any VAV16 is deemed abnormal, the supply air volume is determined on the assumption that the required air volume value of that VAV16 is equal to the minimum air volume value. In addition, if all of the VAV indoor measured temperature value, the VAV required airflow value, and the VAV measured airflow value fall within a normal range at a certain point in time after a predetermined time TP has elapsed, the controller 31 controls the VAV16 in real time. Automatically return to the control target, and reflect each control. If all VAVs 16 are determined to be abnormal, the controller 31 causes the air conditioning system 13 to stop abnormally. After the abnormal stop, the controller 31 does not operate the air supply fan 47 until all of the VAV indoor measured temperature value, the VAV required air flow value, and the VAV measured air flow value of any of the VAVs 16 are within the normal range. (Even if an operation command is received from the equipment management device 12, the air supply fan 47 is not operated.) In addition, if all of the VAV room measured temperature value, VAV required air volume value, and VAV measured air volume value of one VAV16 in the air supply volume control are within the normal range, the rotation speed of the air supply fan 47 is corrected. Is performed based on the degree of opening of one VAV16. The opening of the VAV16 that is regarded as abnormal is not used for correcting the rotation speed of the air supply fan 47. Also, when calculating the sum of VAV required airflow, the minimum airflow is used for VAV16 whose required airflow value is not in the normal range.

After a predetermined time TP has elapsed, the controller 31 sets the air supply set temperature data, air supply dew point temperature data, outside air measurement temperature data, outside air measurement humidity data, VAV indoor measurement temperature data, VAV required airflow data, and VAV measurement airflow. The data is monitored, and once within the normal range, if the data value deviates from the normal range, processing for each abnormal data is performed. This processing is intended to prevent the abnormal value from being adopted immediately when the set value fluctuates due to noise or the like while the controller 31 is energized, thereby preventing control hunting.

(Air supply set temperature data and air supply dew point temperature data) As for the air supply set temperature data and the air supply dew point temperature data, there is a change within the normal range. If the value after the change is monitored for 60 seconds and is constant, the values are adopted. If there is a change within 60 seconds, start measuring the time and monitor the force again. Until the data value is determined, the data value before the change is used as the control value. After a lapse of the predetermined time TP, the abnormality is determined. After that, the data value falls within the normal range, and the data value is monitored for 60 seconds. If the data value is constant, the data value at that time is set as the set temperature. After the data value deviates from the normal range, if the data value is monitored for 60 seconds and does not return to the normal range, the data value is determined to be abnormal and the data value before the abnormality is determined is adopted (that is, the abnormal data value). Is ignored). Thereafter, if the data value falls within the normal range and the data value is monitored for 60 seconds and is constant, the data value is updated.

[0025] (Outside air measurement temperature data and outside air measurement humidity data)

For outside air measurement temperature data and outside air measurement humidity data, if the data value deviates from the normal range for 60 seconds, the abnormality is determined. If the data value is maintained within the normal range for 60 seconds, the abnormality is released. When the abnormality is determined, the controller 31 notifies the equipment management device 12 of the occurrence of the abnormality. In addition, if any of these data values deviates from the normal range and the outside air cooling operation does not hunt, the outside air cooling control is started for 180 seconds if the start condition of outside air cooling control is satisfied. Do not judge control prohibition. If any of the data values deviate from the normal range during the outside air cooling control, the controller 31 prohibits the outside air cooling control three minutes after the departure time. After that, if both of the data values fall within the normal range and the data values are constant for 60 seconds or more, the start of the outdoor air cooling control is determined at the elapse of the 60 seconds. Further, the controller 31 stops the outside air cooling control in real time when receiving the outside air cooling prohibition command from the facility management device 12 during the outside air cooling control. After that, when the controller 31 receives the outside air cooling permission command from the equipment management device 12 and starts the outside air cooling control, the controller resets the 180-second timer.

[0026] (VAV indoor measured temperature data, VAV required airflow data and VAV measured airflow data)

For VAV indoor measured temperature data, VAV required airflow data, and VAV measured airflow data, refer to [Limited control method] (if there is an error in communication with the VAV controller). This is the same as the processing performed in (g).

(1)

In the air conditioning system 13 according to the present embodiment, when the power is turned on or the power is restored, the predetermined time TP, the information abnormality determination unit 34 of the controller 31 and the supply air temperature setting value and the air supply dew point temperature setting received by the communication unit 32 are set. Judgment is made as to whether the value, the outside air measurement temperature value, the outside air measurement humidity value, the VAV room measurement temperature value, the VAV required airflow value, and the VAV measurement airflow value are within the normal range. Then, when the information abnormality determination unit 34 determines that the above value is not within the normal range, the device control unit 33 controls the VAV 16 by a limited control method. Therefore, even if an abnormality occurs in the equipment management device 12 or the VAV 16, air-conditioning operation can be performed. Further, in this air conditioning system 13, normal operation is not executed unless it is determined that all the above data fall within the normal range. Therefore, in the air-conditioning system 13, reliable control without waste and without erroneous determination can be realized. As a result, the air-conditioning system 13 can realize highly reliable operation.

[0027] (2)

In the air conditioning system 13 according to the present embodiment, since both the connection ports 3 la and 3 lb of the controller 31 correspond to the LonTalk protocol of the open network LonWorks network, the equipment (VAV) to be connected is It can be used by any manufacturer, and it is possible to use any equipment that supports the LonTalk protocol regardless of the manufacturer when replacing or adding equipment in the future.

(3)

The air-conditioning system 13 according to the present embodiment is formed as a one-pack, and can operate independently of a higher-level system using a LonWorks network. Therefore, when a failure occurs in a higher-level system such as the facility management device 12, or when a failure occurs on the communication line 10 of the LonWorks network, for example, a command is directly sent to the controller 31 via a remote controller or the like. By sending, the air conditioning system 13 can operate normally

<Modification> (A)

In the above embodiment, the present invention is applied to an air conditioning system including the air han 14 and the VAV 16, a central system including a heat source unit and a secondary unit, an air conditioning system including an air han and a floor fan unit, and an outdoor unit. The present invention can be similarly applied to a package-a-con system including an indoor unit.も Even in the case of misalignment, provide two connection ports on the master unit corresponding to the controller that performs the main control, and use one of the connection ports to locally connect the terminal device (slave unit) subordinate to the master unit. If this is the case, the same effects as those of the air conditioning system of the above embodiment can be obtained.

(B)

In the above embodiment, the force to be controlled is only VAV16. Alternatively or additionally, the fan coil unit, the exhaust fan 51, and the like may be controlled.

Industrial applicability

INDUSTRIAL APPLICABILITY The control device for equipment according to the present invention can operate equipment with high reliability and can be applied to an air conditioning system and the like.

Claims

The scope of the claims

A control device (31) connected to a higher-level equipment management device (12) by a communication line (10) of a predetermined equipment network and controlling the equipment (16),

A first communication connection unit (31a) corresponding to the equipment network for performing first communication with the equipment management device (12);

A second communication connection unit (31b) corresponding to the equipment network for performing a second communication with the equipment (16);

Necessary control information, which is information essential for controlling the equipment (16), is transmitted from the equipment management device (12) via the first communication connection part (31a) and from the equipment (16). A receiving unit (32) for receiving via the second communication connection unit (31b);

Based on the essential control information, the equipment control unit (33) for controlling the equipment (16) and the essential control information received by the receiving unit for a predetermined time after the power is turned on are abnormal. An information abnormality determining unit (34) for determining whether there is

With

The device control unit (33), when it is determined by the information abnormality determination unit (34) that the essential control information is abnormal at the time when the predetermined time has elapsed, after the predetermined time has elapsed, Controlling the equipment (16) based on alternative control information prepared as an alternative to the essential control information,

Equipment control equipment (31).