JPH0516079B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Technical Field] The present invention relates to an improvement in an air conditioning control device used for automatic control of an air conditioning device.

[Conventional technology]

FIG. 1 is an instrumentation diagram showing a conventional example, in which an air conditioner consisting of a cooling coil CC, a heating coil HC, a humidifying spray SP, and a blower FNc is provided, and outside air A ₀ is taken in through a damper DM ₁ . After cooling or heating and humidifying, the air is blown into the room, while the exhaust air Ad is sucked in by the blower FNd, and the damper
In addition to being exhausted through DM ₂ , it is also supplied to the air conditioner through damper DM ₃ , and a portion of the exhaust gas Ad is circulated to save energy.

In addition, the central control unit performs monitoring and centralized control.
Between the CE and the controller CT that performs local control,
Data collection panel with data signal transmission and reception function
Actuator connected via RS to control the opening degree of dampers DM ₁ to _{DM 3} (A control device that receives a control signal and controls a mechanical load is defined as an actuator in this specification) A ₁ to _{A 3} , actuators A ₄ to A ₆ that control motor control valves MV ₁ to _{MV 3} that adjust the amount of water supplied to the cooling coil CC, heating coil HC, and spray SP, and blowers FNc and FNd.
status contacts S ₁ , S ₂ , temperature sensor T ₁ and humidity sensor H ₁ that detect the temperature and humidity of the air supply to the room, temperature sensor T ₂ and humidity sensor H ₂ that detect the temperature and humidity of the exhaust air Ad, Temperature sensor T ₃ and humidity H ₃ , etc., which detect the temperature and humidity of
Each sensor based on setpoints given via
The controller CT performs control calculations according to the detection outputs of T ₁ to T ₃ and H ₁ to _{H 3} and the status of status contacts S ₁ and S ₃ .
is performed, and control outputs are sent to each actuator A ₁ to _{A 6} according to the results.

The power panel PC that controls the start and stop of the blowers FNc and FNd is also connected to the data collection panel RS, and the blowers are controlled according to commands from the central control unit CE.
It is designed to control FNc and FNd.

[Problem to be solved by the invention]

However, in such a conventional configuration, each actuator A ₁ -A ₆ , each status contact S ₁ , S ₂ and each sensor T ₁ -T ₃ , H ₁ -H ₃ are connected by each individual wiring, and Since the required number of wiring differs depending on these types, the required wire cost and wiring man-hours increase, and there are disadvantages such as difficulty in adding actuators, status contacts, sensors, etc.

Furthermore, there was a problem in that the operation had to be stopped if control became impossible.

[Means to solve the problem]

The present invention has been made to solve these problems, and is configured to connect a controller and an actuator via a transmission line, and to control the actuator via a data transmission line via the transmission line. ing. The actuator then controls the controlled equipment, that is, the motor for controlling the air conditioner, based on the command signal supplied via the transmission line, and if the control of the motor is not completed within a predetermined time, it is determined that there is a failure and the motor is driven. stop. Also, when there is an abnormality in data transmission, the air conditioner is controlled using the preset value.

In this way, the number of routing lines is reduced by controlling data transmission via the transmission line.

[Effect]

Control is performed by data transmission via the transmission line, and even if the control becomes impossible, the minimum necessary operation can be performed.

〔Example〕

The details of the present invention will be explained below with reference to FIG. 2 and subsequent figures showing embodiments.

FIG. 2 is an instrumentation diagram similar to FIG. 1, but here each actuator A ₁ -A ₆ , each status contact S ₁ , S ₂ , each sensor T ₁ -T ₃ , H ₁ -H ₃ and the power panel PC are controlled by a common transmission path L.
The controller ACD directly sends and receives data signals to and from the central controller CE.
Data signals are transmitted and received in a time-division manner via transmission line L, and status contacts S ₁ and S ₂ and each sensor
Control calculations are performed according to the outputs of T ₁ to T ₃ and H ₁ to _{H 3} , and actuators A ₁ to A 1 are operated according to the results.
It is designed to control A ₆ and the power panel PC.

Therefore, the data collection panel RS in FIG. 1 is omitted, and the actuators A ₁ -A ₆ , status contacts S ₁ , S ₂ and sensors T ₁ -T ₃ , H ₁ -
The amount of wiring between the H ₃ and the controller ACD is significantly reduced, reducing the required wire cost and wiring man-hours, and making it extremely easy to add actuators, status contacts, sensors, etc.

Figure 3 is a block diagram showing the configuration of the controller ACD, centered around the microprocessor CPU.
A fixed memory ROM, a variable memory RAM, and interfaces I/F ₁ to I/F ₃ are arranged around the periphery, and these are connected by a bus BUS, and instructions stored in the fixed memory ROM are transferred to the processor.
The CPU executes and stores the required data in variable memory RAM
It is designed to perform data signal transmission/reception and control calculations while accessing the data.

Note that interface I/F ₁ has a display
A DP and keyboard KB are connected, and control settings can be entered from the keyboard KB, and required data can be displayed on the display DP.

In addition, interface I/F ₂ and I/F ₃ have transmitting and receiving functions.
Through _F2 , data signals are transmitted and received with actuators _A1 to _A6 , status contacts _S1 , _S2 , sensors _T1 to _T3 , _H1 to _H3 , and power panel PC, while interface I/ Via _F3 , data signals for monitoring are sent and received with the central control CE.

Figure 4 is a flowchart showing the main operating status of the controller ACD.If the result of the "self-diagnosis" according to the predetermined steps is NO, "Is there an abnormality?" ”
After performing "input processing" such as storing the received data in the variable memory RAM, it performs "control calculations" according to the received data and setting values, and stores the results in the variable memory RAM. Perform "output processing" such as.

Note that the control data stored through the "output processing" will be transmitted during the next "data transmission/reception with the sensor/actuator."

Next, depending on the presence or absence of a data transmission request signal from the central control unit CE and the presence or absence of data changes in the variable memory RAM, the central control unit determines whether data transmission/reception with the CE is necessary, and if this is YES,
The central control unit "transmits and receives data to and from the CE" and repeats the above operations.

FIG. 5 is a block diagram showing the configuration of temperature sensors _T1 to _T3 , in which a crystal oscillator X having specific temperature and frequency characteristics is used as a temperature detection element, and
This is connected to the oscillation circuit OSC, and oscillation output with a frequency depending on the temperature is extracted.

The output of the oscillator OSC is the frequency divider DV of a counter etc.
The frequency is divided by CNT, and is then given to the counter CUT, where the divided output is counted every predetermined reference time, and this count value is given to the control unit CNT, where the count value is the temperature value. The temperature value data is then sent to the transmission circuit SR, and in response to a data transmission request signal such as a polling signal from the controller ACD, the temperature value data is transmitted to the controller ACD via the transmission circuit SR. ing.

The control unit CNT, which is composed of a microprocessor, memory, input/output circuit, etc., also has a data transmission/reception control function, and the transmission circuit SR
Compare the address specified by the data transmission request signal given via the address setter AS with the self-specific address set by the address setter AS,
Temperature value data is transmitted in response to a match between the two.

In addition, the control unit CNT stores programs for various purposes in its memory in order to facilitate sharing through high-density integrated circuits, etc., and the programs in the memory are specified by the mode setter MS. Therefore, in this case, the mode setting device MS sets the operating mode as a temperature sensor.

In addition, the crystal oscillator
In addition, a pulse generator PG for generating clock pulses for regulating the operation of the control section CNT is provided, and a display section DP for indicating the temperature value determined by the control section CNT is provided. be.

In addition, the control unit CNT is designed to send out information on whether the external contact S is on or off along with the temperature value data, and for this purpose, it is designed to be able to connect the contact S of an operating switch, etc. There is.

However, in this case, the transmission line L is a three-wire type, with line _L1 for signals, line _L2 for power supply, and line _L3 for common use, and supplies are supplied from lines _L2 and _L3 . The power supply is stabilized by the power supply circuit PS, and
It is supplied to each part as a local power supply E.

Note that the counter CUT is configured such that a signal is applied from the control unit CNT to the reset terminal R and the inhibit terminal INH, and thereby the clearing of the counter CUT and the start and stop of the counting operation are controlled. There is.

In addition, the main functions of the control unit CNT are "START" when the power is turned on, "initial processing" that sets the initial state of each part, "measurement processing" such as capturing the count value of the counter CUT and storing it in memory, and contact control. ``Contact information processing'' that takes in information from S and stores it in memory, ``Transmission processing'' that sends measurement data etc. in response to requests from the control unit ACD, and ``Command processing'' that executes commands from the control unit ACD. '', and these are appropriately combined and executed depending on the operation mode.

FIG. 6 is a flowchart showing the details of the "measurement process." First, a signal is applied to the reset terminal R of the counter CUT to perform "counter clear," and then a signal is applied to the inhibit terminal R of the counter CUT.
The signal given to INH is extinguished, a "counter start" is performed, and the "Reference time elapsed?" check is performed to determine whether the reference time determined according to the oscillation frequency has elapsed.
If the result is YES, a signal is applied to the inhibit terminal INH to cause the counter to stop.

Next, by "capture count value", for example, the lower 12 bits of the count output of the counter CUT are fetched, and further, for example, the upper 4 bits of the count output of the counter CUT are checked, and the "upper 4
Bit count? ” is NO, it is assumed that the actual measured value exceeds the measurement range, and it is determined that it is “range over”.

Next, if "upper 4 bits count?" is normal, it is YES, and the count value imported by "count value import" is "converted to temperature T" by a predetermined calculation, and this result is “−50℃＜
If YES for "T", it is further determined whether the actual measured value is within the measurement range based on "150°C>T".

In addition, for "-50℃<T" and "150℃>T"
If NO, shift to "range over".

FIG. 7 is a flowchart showing the details of the "transmission process". Here, the polling/selecting method is shown. First, the data obtained in FIG. After setting it to the internal transmit register (not shown),
It enters a standby state to receive a signal from the ACD, and when "signal reception" is performed, it determines "polling signal?" by determining the code, and in response to YES,
The address set by the address setter AS and the address indicated by the polling signal are compared using the "Address match?"
If YES, after performing "preparation for transmission", send the contents of the transmission register (not shown) inside the control unit CNT in FIG. Accordingly, data transmission ends.

However, if there is a "range over" in FIG. 6, data such as all digits are set to zero when "setting data to the transmission register (not shown) inside the control unit CNT in FIG. Over”
It is designed to notify the controller ACD.

As shown in Figure 5, contacts such as operation switches and motor status contacts can be connected to the control unit CNT, and their on/off status is also stored in memory during "measurement processing", and this data is is to be transmitted during the "transmission process" shown in FIG.

In addition, each setting device MS, AS,
ZA etc. use a diode matrix circuit,
Although it is preferable to generate a predetermined code by cutting off a predetermined diode, the same effect may be achieved by using a digital switch, a strap terminal, or the like.

As the temperature detection element, in addition to the crystal oscillator
A converter circuit composed of OSC or counter CUT may be selected.

Note that the power supply by the lines L ₂ and L ₃ may be performed by making the transmission line L a two-wire type, and by phantom power supply, or by using a separate power supply.

FIG. 8 is a block diagram showing the configuration of temperature sensors H ₁ to _{H 3.} For example, a counter electrode is formed on the surface of an acrylic plate, and a humidity detection element HD coated with lithium chloride solution is provided. The output is converted into an electrical signal by a conversion circuit CV and then fed to an analog-to-digital converter (hereinafter referred to as ADC) A/D, and the electrical signal converted to a digital signal is further sent to the control unit CNT. given,
In response to the polling signal from the controller ACD, the humidity value data is sent to the controller via the transmission circuit SR.
It is supposed to be sent to ACD.

Note that the control unit CNT, which is composed of a microprocessor, memory, input/output circuit, etc.
As shown in the figure, it also has data transmission and reception control functions.
The address specified by the polling signal given via the transmission circuit SR and the address setter
It compares the address with its own unique address set by the AS, and if the two match, it sends humidity value data.

In addition, as shown in Fig. 5, the control unit CNT stores programs for various purposes in its memory in order to achieve common use in high-density integrated circuits, etc., and the mode setter MS controls the programs stored in the memory. In this case, the mode setting device MS is used to set the operating mode as a humidity sensor.

In addition, the humidity detection element HD has inherent characteristic deviations, and in order to compensate for these deviations, a zero setter ZA is provided, as well as a control unit CNT and a conversion circuit.
In order to supply an AC signal to the CV via a frequency divider DV such as a counter, a pulse generator PG that generates clock pulses is provided.Furthermore, a pulse generator PG is provided to generate an analog signal from the conversion circuit CV to the control unit CNT.
ADC/A/D is provided, and a display section is provided for the purpose of indicating the obtained humidity value by the control section CNT.
DP is provided.

Note that the other configurations are the same as those shown in FIG. 5.

Figure 9 is a block diagram showing the details of the conversion circuit CV, in which only the AC component is extracted from the output of the frequency divider DV by the capacitor C, and then the humidity detection element HD
This causes the humidity detection element HD to pass an alternating current to the humidity detection element that responds to the humidity.
The change in HD impedance is determined as a change in alternating current.

The voltage V ₃ obtained by the alternating current is inverted by the inverting amplifier A ₁ to become a voltage showing the reciprocal number, then detected by the detection circuit DET, and smoothed by a reduction filter LPF such as an integrating circuit. After being multiplied by a coefficient 1/K ₁ by a coefficient multiplier FM ₁ , it is applied to an adder AD ₁ .

On the other hand, when determining humidity, it is also required to determine temperature, so a bridge circuit is configured with resistors R ₁ to R ₃ and a temperature detection element TD such as a nickel wire resistor, and power supply E is applied to this. Moreover, resistor
Take out the unbalanced voltage from the connection point between R ₁ and R ₂ and the connection point between resistor R ₃ and temperature detection element TD,
After performing differential amplification with an amplification factor K ₄ in the differential amplifier A ₂ , this output is multiplied by a coefficient 1/K ₅ in the coefficient multiplier FM ₃ and then applied to the adder AD ₁ .

The output of adder AD ₁ is converted to coefficient K ₂ by coefficient multiplier FM ₃ .
is multiplied, and the voltage Ve of the level shift power supply e is added in the adder AD ₂ , and then the amplification degree is
It is sent to the output OUT via the buffer amplifier A ₃ of K ₃ , whose output voltage V ₀ is proportional to the humidity value.

In other words, the impedance of the humidity sensing element HD
Z _H is generally expressed by the following formula, where H is humidity and T is temperature.

_Z. ^_ The output voltage V ₀ in the same figure is the peak value of the AC signal applied to the resistor R ₁ = R ₃ = R and the humidity detection element HD.
V ₁ and the voltage of power supply E is V ₂ , it is given by the following equation.

Vo={R ₄ V ₁ /2Z _H /K ₁ −(R _T /R+R _T −R ₂ /R+R
₂ ) K ₄ V ₂ /K ₅ }K ₂ K ₃ +VeK ₃ ...(2) Therefore, the level shift voltage Ve is added, and the output voltage Vo changes in proportion to the humidity H. .

The main function of the control unit CNT is the temperature sensor _T1 .
This is the same as in the case of ~ _T3 , and data signal transmission and reception is performed in the same manner as in FIG.

In addition, the setting devices MS, AS, ZA, etc. are the same as those shown in Fig. 5, but as the humidity detection element HD, in addition to those mentioned above, it is sufficient to use one whose electrical characteristics change depending on the humidity. The configuration of the conversion circuit CV may be selected depending on the type of the conversion circuit CV, and instead of using a clock pulse as the AC signal applied to the humidity detection element HD, an AC signal generated by another circuit may be used.

FIG. 10 is a block diagram showing the configuration of the actuators A ₁ to _{A 6} , in which a transmission circuit SR is provided which is connected to a transmission line L consisting of lines L ₁ and L ₂ and transmits and receives data signals via this. Yes, controller ACD
The command signal and polling signal from the SR are given to the control unit CNT via the transmission circuit SR, where they are decoded and a control signal corresponding to the command signal is given to the driver DR. A motor M for DM or motor control valve MV is driven to control the opening and closing of the damper or valve.

However, there is a potentiometer RV connected to the damper or valve, which sends a signal according to the opening degree of the damper or valve, and its output is digitally converted by ADC/A/D. After being converted into a signal, it is given to the control unit CNT, and the control unit CNT receives the damper or valve opening value commanded by the command signal and the ADC/A/D.
The motor M is compared with the opening value of the damper or valve indicated by the output of , and the motor M is controlled in a direction in which the difference between the two opening values becomes zero.

In addition, since the controller ACD calculates the opening value of the damper or valve at that time and then performs control calculations, the output of the ADC/A/D is sent to the controller ACD.
The data must be sent to the transmission circuit
In response to a polling signal from the controller ACD via SR, the controller CNT sends the output of the ADC/A/D to the transmission circuit SR, and via this sends the opening value data to the controller ACD. It's summery.

Note that the command signal and polling signal include information indicating the address, and this signal indicates that the self-specific address set by the address setter AS matches the address specified by the command signal and polling signal. control part
The CNT makes the determination and, depending on the match, performs the above-mentioned operations.

In addition, as shown in Fig. 5, the control unit CNT stores programs for various purposes in its memory in order to achieve common use through high-density integrated circuits, etc., and the programs in the memory can be changed by the mode setter MS. In this case, the mode setting device MS is used to set the operating mode of the actuator.

In addition, a reference value setter SS is provided to prevent the opening degree from being left unspecified in the event that data signal transmission and reception become impossible.
If command signals are not received accurately,
The control unit CNT judges this and controls the motor M by determining the opening degree of the damper or valve to the value preset by the reference value setter SS. A pulse generator PG is provided for generating clock pulses.

Note that the other configurations are the same as in FIG. 5.

FIG. 11 is a circuit diagram showing the circuits of the driver DR and the motor M. When the control unit CNT sends a signal F for normal rotation of the motor, the transistor Q ₁ is turned on and the light emitting diode of the photo triax PT ₁ is turned on. The light is emitted, the opposite triax turns on, and the triax is activated through resistor _R11 .
Since the gate voltage is applied to TA ₁ , triac TA ₁ is also turned on, and the separately supplied power supply AC is turned on.
to the winding FL ₁ of the motor M, and the winding
FL ₂ is energized via a phase advance capacitor C ₁₁ to cause the motor M to rotate in the normal direction, and for example, a damper or a valve connected thereto to open.

Furthermore, if signal B for motor reversal is given from the control unit CNT, transistor _Q2 is turned on.
The light-emitting diode of the photo triac PT ₂ emits light and the corresponding triac turns on, applying a gate voltage to the triac TA ₂ through the resistor _R12 , so that the triac TA ₂ is also turned on and disconnects from the power supply AC. The winding FL ₂ of the motor M is energized, and the winding FL ₁ is energized via the capacitor C ₁₁ , so that the motor M performs a reverse rotation, in which case the damper or valve shifts to the closed state. ing.

In addition, a manual (M) and automatic (A) selector switch SW ₁ is provided, and when this is set to manual (M), the motor M is turned on by turning on switch SW _2.
rotates in the normal direction, and the damper or valve rotates in the (OPEN) direction. On the other hand, depending on switch SW ₃ being turned on, the motor M rotates in the reverse direction, and the damper or valve rotates in the (CLOSE) direction.
Since the damper or valve can be rotated in the same direction, the opening and closing of the damper or valve can also be controlled by manual operation.

The main function of the control unit CNT is the temperature sensor.
It is similar to the case of T ₁ to T ₃ .

FIG. 12 is a flowchart showing the details of the transmission process. After "setting the measurement data obtained by the "measurement process" to the transmission register (not shown) inside the control unit CNT in FIG. After performing a "timer start" to monitor whether or not received data arrives within the time, it enters a standby state, and performs a parity check etc. in response to data reception to check for errors. If "Reception error occurred?" is NO, it is determined whether it is a command signal or not by "Command signal?", and if this is NO, it is determined whether it is a polling signal or not by "Polling signal?", and then YES is determined. According,
The address designated by the polling signal and its own address are determined by "Does the address match?"

If "Address match?" is YES, after performing "preparation for transmission", the contents of the transmission register (not shown) inside the control unit CNT in FIG. 10 are changed to "data transmission".
The transmission is completed in response to YES in "End of transmission?".

Also, if ``reception error occurred?'' is YES, ``error flag set'' is performed in response to ``timer/time up?'', while ``command signal?''
If YES, perform ``command data reception'' of the command value indicated by the command signal, determine whether ``address matches?'' in the same way as above, and then
After ``setting the command flag'' according to YES, ``setting the command data to the command register'' prepares for ``command processing.''

FIG. 13 is a flowchart showing the details of "command processing", and it is determined whether "transmission is normal" according to the status of "error flag set" in FIG. Based on the status of "Command Flag Set" in "Is there a command flag?", check this
In response to YES, it is determined whether the command value indicated by the command data is within a specified range or not based on "Is the command data normal?"

If "Command data normal?" is YES, stop sending control signals to driver DR,
After "stopping the motor", select NO for "Command data fully closed?" and "Command data fully open?"
In response to NO, the difference between the opening value indicated by the command and the opening value indicated by the output of the ADC/A/D is calculated, and the opening value difference is stored in the output register. After determining the predetermined tolerance of opening value difference ``D ₁ ≧ opening value difference'',
In response to NO, a "monitoring timer preset" is performed to check whether the response of the motor M and damper or valve is performed normally.
Subsequently, a control signal in the direction of decreasing the opening value difference is sent to the driver DR by "sending command".

Also, "Monitoring timer time up?"
Until NO, "opening measurement" is performed by sequentially storing the output of ADC/A/D in memory, and in response to this, "opening measurement" is performed in the same way as above. "Set to output register" and then
A control signal is sent to the driver DR by "command sending", and the sign of the opening value difference is reversed due to excessive rotation of the damper or valve, and the control signal changes from F to B or from B to F accordingly. Determine whether the polarity has changed based on "Command polarity change?" and then perform "Command Flag Reset," or set the predetermined tolerance of opening value difference "D ₂ ≧
If the result is YES, the control signal is stopped from being sent out after the command flag is set, and the motor is stopped.

If "Transmission normal?" is NO, "the preset value set by the reference value setter AS is set to the output register (not shown) inside the control unit CNT in Fig. 10", and then "error flag reset" is performed. ”, and in this case,
Based on the preset value, control after "motor stop" and "command data fully closed?" is performed, and the opening degree is determined according to the preset value.

In addition, in response to NO in "Is the command data normal?", "error flag set" is performed,
If ``command data is fully closed?'' is YES, a ``full close command is sent'', and if ``command data is fully open?'' is YES, a ``full open command is sent'', and the motor M is immediately moved in the fully closed or fully open direction. continuously controlled.

In addition, if an abnormality occurs in the motor M, damper, or valve mechanism, the "monitoring timer time up?" becomes YES, so the "motor failure flag is set" and the motor immediately stops. Transition.

Therefore, the motor M is controlled in response to data exchanged with the controller ACD, and the opening degree of the damper or valve is set in accordance with the command data of the command signal.

However, the controller ACD has each actuator A ₁
~ _A6 , a commad signal and a polling signal are paired and sent periodically and repeatedly, and a space period is provided at the timing of sending these signals, and the current opening value is A data signal indicating is transmitted in this space period,
This is received by the controller ACD.

In addition, as shown in FIG. 10, the operation switch,
It can be connected to the control unit CNT such as the motor status contact, and its on/off status is also stored in the memory during the "measurement process", and this data is transmitted during the "transmission process" shown in Figure 12. It is supposed to be sent.

In addition, each setting device MS in Fig. 10,
AS, SA, etc. are the same as the temperature sensors T ₁ to _{T 3} , but the configuration of the driver DR can be selected arbitrarily depending on the conditions, and a rotary code generator etc. can be used instead of the potentiometer RV. may also be used.

However, the configuration shown in FIG. 2 is determined depending on the conditions, and the actuators A ₁ to _{A 6} ,
Status contacts S ₁ , S ₂ and each sensor T ₁ to _{T 3} ,
You only need to select the number of H ₁ to _{H 3} or connect the status contacts S ₁ and S ₂ to each sensor T ₁ to _{T 3} and H ₁ to _{H 3}
Or it may be connected to any one of the actuators A ₁ to A ₆ , and various other modifications can be made.

Furthermore, although the above transmission method has been explained using the polling/selecting method, it is possible to transmit using the contention method by changing the programs of the sensors, actuators, and controllers connected to each transmission path. You may go.

To summarize the above, the present invention
ACD, transmission line L, multiple sensors T and H,
It is composed of a plurality of actuators A1 to A6, and the controller transmits and receives data signals as well as performs control calculations.The transmission line is connected to a plurality of sensors and actuators, and is connected to the controller. The sensor transmits data signals, and the sensor detects temperature or humidity, and when the address specified by the polling signal via the transmission circuit matches its own address, the sensor outputs the detection result in response to the polling signal. is transmitted as a data signal, and the actuator is a motor for driving the air conditioner in response to the command signal when the address specified by the command signal via the transmission circuit matches its own address. a control process for controlling the amount of rotation; a failure determination process for determining that the air conditioner is malfunctioning and stopping the drive of the motor when control of the motor is not completed within a predetermined timer period; and detecting the current control state. and a data transmission process that transmits the detected current control state as a data signal when the address specified by the polling signal via the transmission path matches the own address, and when the data transmission becomes impossible. A reference value setting process is performed to preset a motor rotation amount control value for driving an air conditioner.

〔Effect of the invention〕

As described above, in the present invention, the sensor and actuator are controlled by data transmission via the transmission line, so that the only connection between them and the controller is the transmission line for data transmission. Furthermore, if the motor for controlling the air conditioner does not complete its operation within a predetermined period of time, it can be determined that the motor has failed. Furthermore, even if data transmission becomes impossible, the air conditioner can be operated in a preset state, so the air conditioner will not be inoperable or will not operate in an extremely abnormal state. For this reason, the actuator
It becomes extremely easy to add status contacts and sensors, and a remarkable effect can be obtained in various air conditioning control devices.

[Brief explanation of the drawing]

FIG. 1 is an instrumentation diagram showing a conventional example, FIG. Flowchart showing the operating status, Figure 5 is a block diagram of the temperature sensor, Figures 6 and 7 are flowcharts showing the operating status of the temperature sensor, Figure 8 is a block diagram of the humidity sensor, and Figure 9 is a block diagram of the temperature sensor. 8 is a block diagram of the conversion circuit, FIG. 10 is a block diagram of the actuator, FIG. 11 is a circuit diagram of the driver and motor in FIG. 10, and FIGS. 12 and 13 are flowcharts showing the operating status of the actuator. be. ACD...controller, _A1 to _A6 ...actuator, _T1 to _T3 ...temperature sensor, _H1 to _H3 ...humidity sensor, L...transmission line, CPU...processor,
ROM: fixed memory, RAM: variable memory,
I/F ₁ ~ I/F ₆ ...Interface, X...
Crystal oscillator, CNT...control unit, SR...transmission circuit, HD...humidity detection element, DR...driver,
M...Motor, RV...Potentiometer, A/
D...ADC (analog-digital converter), S
……contact.

Claims (1)

[Claims] 1. Consists of a controller, a transmission line, a plurality of sensors, and a plurality of actuators, the controller transmits and receives data signals and performs control calculations, and the transmission line is , a plurality of sensors and a plurality of actuators are connected, and data signals are transmitted between the controller and the sensor, which detects temperature or humidity and is designated by a polling signal via the transmission circuit. When the address specified by the actuator matches its own address, the actuator transmits the detection result as a data signal in response to the polling signal. a control process for controlling the controlled device according to the command signal when the addresses match; a monitoring process for monitoring whether the controlled device has completed the control within a predetermined timer period; and a current control state. and when the address specified by the polling signal via the transmission path matches the own address, a data transmission process of transmitting the detected current control state as a data signal, and when data reception becomes impossible. 1. An air conditioning control device that performs reference value setting processing to preset values for controlling controlled equipment.