JPS61127010A - Device controller - Google Patents

Abstract

PURPOSE:To obtain a device controller which can be easily operated with low cost by providing a fault detecting means and a fault content discriminating means and diagnosing the fault contents in accordance with the output pattern of an output generating means by means of a diagnosis switch when a fault occurs. CONSTITUTION:A controller for an air conditioner, etc. is provided with a microcomputer 1, a digital input circuit 2, an analog input circuit 3, an output control circuit 4 which drives and controls an output device, a monitor output circuit 5 which displays and monitors the operating state, etc. The computer 1 contains a device controller 6, a fault detecting means 7, a fault content discriminating means 8 and an output generating means 9 which produces the outputs of different patterns according to the contents of the fault decided by the means 8. Furthermore a diagnosis switch 10 and a display element 12 like an LED, etc. are added. Then the different pattern outputs given from the means 9 are displayed by a display element 12 for diagnosis of the fault contents.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] Insomnia relates to a control device that controls equipment such as an air conditioner, and particularly relates to its self-diagnosis function.

[Conventional technology]

FIG. 7 shows a conventional device control device as disclosed in Japanese Patent Application No. 111392/1982, in which 1 is a microcomputer that controls the operation of the device according to a predetermined program, and 2 is an operation switch for changing the operation mode. A digital input circuit inputs digital data necessary for controlling the operation of equipment such as input and protection device input into the microcomputer 1; An analog input circuit that inputs input to the computer 1; 4 an output control circuit that drives and controls an output device such as an electric motor using the output from the microcomputer 1; and 5 an operating state of the device such as "in operation" or "abnormal". 13 is a RAM (random access) circuit in the microcomputer 1;
14 is an addressing device having a number of switches corresponding to the number of address pits in the RAM;
For example, a number of LEs corresponding to the number of bits of data stored in
This is a display device having a display element such as D.

The operation of the conventional device having the above configuration will be explained.

The microcomputer 1 executes arithmetic processing and judgment processing according to a predetermined program using input data from a digital input circuit 2 and an analog input circuit 3, and outputs the results as needed to a control circuit 4 and a monitor output circuit 5.
output to control equipment operation. Further, in the microcomputer 1, data from the digital input circuit 2 and the analog input circuit 3, result data of arithmetic processing, judgment processing, output data, etc. are stored in a predetermined RAM.
The data stored in the RAM at the address set by opening and closing each switch of the addressing device 13 is output to the display device 14, and the data can be known by the lighting and turning off status of each display element. can. Therefore, for example, if an abnormality occurs in the control device or equipment,
If data is stored in the RAM at a predetermined address for each abnormality content, each switch of the addressing device 13 is opened and closed to specify a predetermined address, and the data is stored in the RAM at that address.
The contents of the abnormality can be determined by displaying the data on the display device 14 and explaining the meaning using a code table or the like showing the meaning of the display.

[Problem that the invention seeks to solve]

The conventional device is constructed as described above, and requires a number of switches corresponding to the number of address bits in the RAM of the microcomputer 1 and a number of display elements corresponding to the number of data pits in the RAM, resulting in high costs. At the same time, the number of signal lines between the addressing device 13 and the display device 14 and the microcomputer 1 also increases, making it difficult to arrange the display device 14 at a position where it can be easily operated. For example, if the display device 14 is installed on the same board as the microcomputer 1, the control device must be removed from the inside of the device each time an abnormality is diagnosed, making operation extremely difficult. It became a hassle.

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a control device for equipment that is low cost, easy to operate, and has an abnormality diagnosis function.

[Means for solving problems]

The device control device according to the present invention includes an abnormality detecting means for detecting an abnormality in the device, an abnormality content determining means for determining the content of the abnormality, one diagnostic switch, and a diagnostic switch that is operated by the operation of the diagnostic switch and is activated depending on the content of the abnormality. The apparatus includes an output generating means for generating nine turns of output, and one display for displaying the output of the output generating means.

[For production]

The equipment control device according to the present invention diagnoses the abnormality by generating different arm turn outputs from the output generating means and displaying them on the display depending on the abnormality determined in response to the operation of one diagnostic switch.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, 6 is an equipment control means stored in the program memory of the microcomputer 1, 7 is an abnormality detection means for detecting an abnormality in the equipment, and 8 is an abnormality content for determining the abnormality detected by the abnormality detection means 7. Determination means 9 is an output generation means for generating four turns of output depending on the abnormality determined by the abnormality content determination means 8, and each means 6 to 9 is ffft4. It is composed of a program of a microcomputer 1. 10 is a diagnostic switch for diagnosing the content of the abnormality when an abnormality occurs; 11 is a diagnostic switch 1
The resistor 12 connected in series with 0 is a display device composed of a display element such as an LED.

Note that the direction of the arrow indicates the direction in which the signal or information flows.

Next, the operation of the above embodiment will be explained with reference to FIGS. 2 and 3. FIG. 2 is a flow chart of a program stored in the program memory of the microcomputer 1, and FIG. 3 is an explanatory diagram of the operation of the output generating means 9. First, the microcomputer 1 controls step 2 of controlling one device.
1, the arithmetic processing 1 determination processing and the like are executed according to a predetermined program based on input data from the desotal input circuit 2 and the analog input circuit 3, as in the conventional case.

The results are outputted to the output control circuit 4 and the monitor output circuit 5 at any time to control the operation of the equipment. Step 22-2
4 shows the operation of the abnormality detection means 7 that detects abnormalities in the equipment or the control device itself, and in step 22, the protection device for the equipment in the desotal input circuit 2 (not shown, for example, detects overcurrent during overload operation of an electric motor, etc.). (e.g. relays, etc.) should always be checked to see if they are operating. In step 23, a sensor (not shown, for example, a thermistor or the like for detecting the temperature of each part) in the analog input circuit 3 is used.

) and check if there are any faults such as breaks or short circuits. In step 24, as a result of arithmetic processing and determination processing using the human power data from the desotal input circuit 2 and the analog human power circuit 3, it is checked whether the operating state of the equipment is within the dangerous range.

For example, if an air conditioner is operated under extreme overload or due to a refrigerant gas leak, the temperature of the discharged refrigerant will rise abnormally, and such situations are determined from inputs from sensors and the like. In this way, steps 22 to 24 are steps for detecting an abnormality in the equipment or control device, and the contents differ depending on the equipment to be controlled. If an abnormality is detected in steps 22 to 24, the process proceeds to steps 25 to 27, respectively, where the abnormality content determining means 8 determines the content of the abnormality. In steps 25 to 27, a different number of repetitions (N) is determined for each abnormality detected by the abnormality detecting means 7, and the abnormality is determined. For example, if the protection device is activated, N=1
, N=2 in the case of sensor abnormality, .

In the next abnormality processing step 28, processing to be performed in response to the occurrence of an abnormality is executed. For example, the output control circuit 4 may be turned off to stop each output device, or an abnormality signal may be output to the monitor output circuit 5 to turn on an abnormality indicator light. In this way, when an abnormality occurs, the equipment is stopped and an alarm is issued by the abnormality indicator lamp. Therefore, when the diagnostic switch 10 is operated at this time, the determination step 29 of the diagnostic switch 10 becomes YES, and the process proceeds to step 30. In step 30, the number of repetitions N set in steps 25 to 27 is determined, and if the number of repetitions N has not been completed, the process proceeds to pulse output step 31, and again in step 30, the number of repetitions is determined. Therefore, for example, if N=2 is set, the pulse output step 31 is executed twice, and N==
If n, the step 31 for outputting the output is executed n times.

/4' pulse output step 31 is set in advance to generate a pulse output with an on time of 1 second and an off time of 1 second as shown in FIG. A continuous Noculus output of 1 second on and 1 second off for the number of repetitions N times set in 25 to 27 is obtained. The display 12 receives this output and signal and turns on when it is on and turns off when it is off, so the number of repetitions N can be determined by measuring the number of times the display 12 lights up after operating the diagnostic switch 10. Since the number of repetitions N for each abnormality content is set in advance, the abnormality content can be diagnosed indirectly.

FIG. 4 is a flowchart showing the operation in another embodiment of the present invention, and FIG. 5 is a diagram explaining the operation of the output generating means 9. Steps in FIG. 4 that are numbered the same as those in FIG. 2 perform exactly the same operations as described above, and their explanation will be omitted. In steps 41 to 43, a different timer 1 hour to is set for each abnormality detected by the abnormality detecting means 7 to determine the abnormality. For example, if the protection device is activated, t0 = 1 second, if the sensor is abnormal, t0 = 2 seconds, etc.
. . , in the case of temperature abnormality, a timer of one hour is set respectively, such that t, )=n seconds. In addition, when an abnormality occurs, the diagnostic switch 1
If 0 is operated, the program proceeds to step 44;
At this point, the output of the output generating means 9 is turned on, and step 4
The timer starts counting at 5. In step 46, it is determined whether the timer has counted the set time t0 or not, and this step is repeated for the set time. When the set time t0 has elapsed, the process proceeds to step 47, where the output generating means 9
output is turned off. Therefore, timer setting time t0=
In the case of 1 second, the pulse output is output for 1 second as shown in FIG. 5(a), and when the time is n seconds, the pulse output is output for n seconds as shown in FIG. Output from.

The display 12 receives this output and lights up only during the on time.

Therefore, after operating the diagnostic switch 10, the display 12
You can know the timer 1 hour t0 by measuring the time that the is lit with a clock or a stopwatch, and since the timer 1 hour t0 is set in advance for each abnormality content, you can indirectly know the abnormality content. can. In addition, in the above explanation, the timer setting time was set to 1 second intervals, but
There is no need to limit it to 1. For example, 5 seconds, 10 seconds, 15 seconds.
seconds.

..., it is possible to make a sufficient determination even if some error occurs when measuring the lighting time of the display 12.

Further, FIG. 6 is an installation state diagram of an air conditioner showing that the control device of the present invention is applied to an air conditioner, where 15 is the main body of the air conditioner, and 16 is the main body of the control device housed in the main body 15. , 17 are remote devices for operating the air conditioner, a diagnostic switch 10 is installed on the remote device 17, and a display 12 is installed on the outside of the main body 15, respectively.

According to the control device of each of the above embodiments, there is one diagnostic switch 10 and one display 12, and the diagnostic switch 1
The number of signal lines connecting the microcomputer 1 with the display 12 and the diagnostic switch 10 is small.
It can be easily placed outside the main body 15 or at a location away from the main body 15, and when an abnormality occurs, diagnosis of the abnormality can be performed on the main body 15.
Diagnostic switch 10 of remote device 17 without opening the package.
This can be easily done by It is also possible to use the display 12 as an abnormality indicator light for monitoring the operation of the air conditioner.

[The origin of invention]

As described above, the present invention includes an abnormality detection means for detecting an abnormality in the equipment, an abnormality content determination means for determining the content of the abnormality, and an output generation means for generating a different pattern output depending on the content of the abnormality. The output generation means is operated by operating the diagnostic switch, and the content of the abnormality can be diagnosed from the output of the display according to the output pattern. Therefore, it is only necessary to provide one diagnostic switch and one display, and it is possible to obtain a control device that is low cost, easy to operate, and has an equipment abnormality diagnosis function.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the device of the present invention, FIGS. 2 and 4 are 70-charts of the first and second embodiments of the device of the present invention, and FIGS. 3 and 5 are diagrams of the device of the present invention, respectively. An explanatory diagram of the operation of the output generating means according to the first and second embodiments, FIG. 6 is an installation state diagram of an air conditioner having the device of the present invention, and FIG. 7 is a configuration diagram of the conventional device. 1.--Microcomputer, 7.--Anomaly detection means. 8... Abnormality content determination means, 9... Output generation means, 1
0...Diagnostic switch, 12...Display, 15...
Air conditioner body, 17--Remote device. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (5)

[Claims] (1) Abnormality detection means for detecting an abnormality in equipment; abnormality content determination means for determining the content of the abnormality detected by the abnormality detection means; one diagnostic switch for diagnosing the content of the abnormality when an abnormality occurs; The present invention is characterized by comprising an output generating means that generates different patterns of output depending on the abnormality determined by the abnormality content determining means, and one display that displays according to the output of the output generating means. Equipment control device. (2) The apparatus for controlling equipment as set forth in claim 1, wherein the output pattern of the output generating means is the number of on/off repetitions. (3) Claim 1 characterized in that the output pattern of the output generating means is a time interval from on to off.
Control device for the equipment described in Section 1. (4) Claims 1 to 3, characterized in that the diagnostic switch is provided on a remote device that is separated from the main body of the device and electrically connected to it, and the display is provided on the outside of the device. A control device for the equipment described in any of the above. (5) An apparatus for controlling equipment according to any one of claims 1 to 4, characterized in that the abnormality detection means, the abnormality content determination means, and the output generation means are constituted by a microcomputer.