JPH04352008A - Failure diagnostic device and diagnostic item setting device - Google Patents

Abstract

PURPOSE:To attain failure diagnosis without extending a scanning time for a programmable controller(PC) and to quickly obtain a diagnostic result. CONSTITUTION:An input unit 13 and an output unit 14 in the PC are respectively provided with two-port memories 13a, 14a. Input information and output information are respectively read out from the memories 13a, 14a to execute failure diagnosis. An obtained diagnostic result is stored in a buffer memory 24 and informed to the PC. Thereby the failure diagnosis can be executed without extending the scanning time of the PC and the diagnostic result can rapidly obtained. In addition, this system can quickly correspond to a failure.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a fault diagnosis device and a diagnostic item setting device thereof, and more specifically, a fault diagnosis device for diagnosing a fault in a mechanical device controlled by a programmable controller, etc., and a device necessary for the fault diagnosis. The present invention relates to a diagnostic item setting device for setting various items.

0002

[Prior art] Programmable controller (hereinafter referred to as PC)
When a mechanical failure occurs in a mechanical device that performs sequence control due to abbreviation), it is important to find the failure point as early as possible, repair it, and shorten the downtime of the mechanical device to improve production efficiency. Connect. Therefore, it is desired that the PC performing sequence control be able to monitor the operation of the mechanical device and immediately detect any abnormality.

[0003] Conventionally, there is a method shown in FIG. 9 as one of the methods to meet such demands. In FIG. 9, (7
0) is PC, (71) is CPU, (72) is memory, (
73) is an input unit, (74) is an output unit, (8
0) is a mechanical device controlled by a PC (70). In addition, (P) is a sequence program, and the mechanical device (8
0) and a failure diagnosis program (Pb) for diagnosing failures in the mechanical device (80). This sequence program (P) is transferred to the memory (72) during operation,
The CPU (71) controls the mechanical device (80) and diagnoses its failure according to the sequence program (P).

In the method shown in FIG. 9, the CPU (71) first calculates the control program (Pa) of the sequence program (P), and connects the mechanical device (
80). When the calculation of the control program (Pa) is completed, a failure diagnosis program (Pb) is calculated based on the information obtained as a result of the calculation, and a failure diagnosis of the mechanical device (80) is performed. When the calculation of the failure diagnosis program (Pb) is completed, the calculation is performed again in the order of the control program (Pa) and the failure diagnosis program (Pb). After that, repeat the same action.

Another method to meet the above demand is as shown in FIG.
There is a method shown in 0. This method uses the PC (
70) is equipped with a fault diagnosis unit (75), the fault diagnosis unit (75) and the CPU (71) exchange information necessary for fault diagnosis, and based on the information,
The failure diagnosis unit (75) performs failure diagnosis of the mechanical device (80). The sequence program (P) used here is only a control program and does not include a fault diagnosis program as in the case of FIG. Diagnosis items for the failure diagnosis unit (75) are set using a dedicated console (76).

In the method shown in FIG. 10, after the CPU (71) completes the calculation of the sequence program (P), the CPU (71) exchanges information necessary for fault diagnosis with the fault diagnosis unit (75) via the bus. The failure diagnosis unit (75) performs failure diagnosis of the mechanical device (80) while the CPU (71) is performing the next scan based on the information thus obtained. The diagnosis results are sent to the CPU (71) and fault diagnosis unit (7
5) is transferred to the CPU (71) during the next information exchange. The CPU (71) performs calculations taking into account the diagnostic results transferred in the next scan.

[0007]

[Problems to be Solved by the Invention] Among the above two conventional methods, in the former method, the CPU (71) has to calculate not only the control program (Pa) but also the fault diagnosis program (Pb). There is a problem in that the scan time becomes longer and, as a result, the takt time of the mechanical device (80) becomes longer. In addition, the failure diagnosis program (Pb)
There are also problems that require further development.

[0008] The latter method requires multiple scans from the time the CPU (71) starts calculations until the result of the failure diagnosis is reflected, so there is a problem that there is a delay in obtaining the diagnosis result. Furthermore, since there is an interruption for information exchange every time the CPU (71) scans, there is a problem that the scan time becomes long. Furthermore, when configuring the device for failure diagnosis, there is a problem in that it is necessary to perform complicated settings on a dedicated console (76).

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a failure diagnosis apparatus that can perform failure diagnosis without increasing the scan time of a control means such as a PC, and can quickly obtain diagnosis results. Another object of the present invention is to provide a diagnostic item setting device that allows easy setting of items necessary for failure diagnosis.

0010

[Means for Solving the Problems] A fault diagnosis device of the present invention includes a control information storage means that stores control information output from the control means and can be accessed simultaneously from two processors, and an operation input to the control means. an operating information storage means that stores information and can be accessed simultaneously by two processors; a fault diagnosis means that performs a fault diagnosis based on the control information and operating information stored in the control information storage means and the operating information storage means; The apparatus is characterized by comprising a diagnosis result information storage means for storing diagnosis result information obtained by the failure diagnosis means, and a diagnosis result notification means for notifying the control means of the diagnosis result.

The diagnostic item setting device of the present invention includes an input means for inputting contents to be set for the diagnostic item;
a display means, a diagnostic item information storage means for storing information regarding items necessary for failure diagnosis, reading out diagnostic item information from the diagnostic item information storage means and displaying the diagnostic item on the display means, and using the input means to display the diagnostic item information on the display means; a setting information generating means for displaying the input information on the display means and further generating setting information based on the diagnosis item information and the input information; and a failure diagnosing means for displaying the setting information generated by the setting information generating means. and setting information sending means for sending out setting information.

0012

[Operation] In the fault diagnosis apparatus of the present invention, the control means such as a PC does not need to perform calculations on the fault diagnosis program, and no interruption for information exchange occurs. As a result, the scan time of the control means does not become long. In addition, since the control information storage means and the operation information storage means each allow two processors to access the storage means simultaneously, when necessary, the control information and the operation information can be directly accessed to read out the control information and the operation information and immediately perform fault diagnosis. be able to. Therefore, failure diagnosis of a controlled object such as a mechanical device can be performed without increasing the scan time of the control means, and diagnosis results can be obtained quickly. Further, since the diagnosis result is immediately notified to the control means, the control means can promptly respond to the failure.

In the diagnostic item setting device of the present invention, the diagnostic items are displayed on the display means, and the set contents are also displayed on the display means, so that the operator can interactively set the necessary diagnostic items while looking at the display on the display means. All you have to do is enter and set the information. Therefore, diagnostic items can be easily set. Furthermore, since setting information is generated based on the settings for each diagnostic item, if the setting information is sent to the fault diagnosis device, a fault diagnosis will be performed according to the setting information.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that this invention is not limited to this.

FIG. 1 is a functional block diagram of a failure diagnosis apparatus according to the present invention. The failure diagnosis device (20) of this invention includes:
Control information storage unit (20a), operation information storage unit (20b)
, failure diagnosis section (20c), diagnosis result information storage section (20d)
) and a diagnosis result notification section (20e).

[0016] The control information storage unit (20a) stores control information output from the PC for controlling the controlled object. The operational information storage unit (20b) stores operational information indicating the operational state of the controlled object, which is input from the controlled object to the PC. This operating information indicates the operating status of the mechanical device controlled by the control information, and is the basis for determining whether the mechanical device is operating normally. Control information storage unit (
20a) and the operation information storage section (20b) can both be accessed simultaneously by two processors. A two-port memory can be used as the control information storage section (20a) and the operation information storage section (20b).

The failure diagnosis section (20c) performs failure diagnosis of the controlled object based on the control information read from the control information storage section (20a) and the operation information read from the operation information storage section (20b). Diagnosis result information storage unit (20d
) stores diagnosis result information obtained by the failure diagnosis section (20c). The diagnosis result notification section (20e) notifies the control means of the diagnosis result. The control means thereby recognizes the fact that a failure has occurred and the details of the diagnosis, and performs control accordingly.

FIG. 2 is a block diagram showing the configuration of an embodiment of a PC equipped with the fault diagnosis device of the present invention, and FIG.
It is a schematic block diagram of C. The PC (10) is a CPU (11).
), a memory (12) for storing system programs, sequence programs, etc., an output unit (14), and an input unit (13).

The CPU (11) sends control signals to the output unit (14) via the bus (16) in accordance with the sequence program. Its control signal is output from the output unit (
14) to the mechanical device (80) via the signal line (82). The mechanical device (80) operates according to the control signal. The input unit (13) also receives an operation signal indicating the operation status of the mechanical device (80) through a signal line (80).
1). Its operating signal is a bus (15
) is sent to the CPU (11), and the CPU (11) outputs a control signal according to the operation signal.

[0020] The output unit (14) is provided with a 2-port memory (14a), and the output unit (14) is provided with a 2-port memory (14a).
16) is temporarily stored in the two-port memory (14a). Then, the signal line (
82) and is output to the mechanical device (80). The control signal information stored in the 2-port memory (14a) is read out by a fault diagnosis device (20), which will be described later, as needed, and sent to the status memory (23) of the fault diagnosis device (20) via the bus (26). Store. 2 port memory (14a)
can receive access from two CPUs at the same time, so the fault diagnosis device (20) can access it at any time and does not need to wait for the CPU (11) to finish accessing it.

The input unit (13) is also provided with a similar two-port memory (13a), and the operation signal information input from the mechanical device (80) via the signal line (81) is
It is temporarily stored in the 2-port memory (13a). Thereafter, it is sent to the CPU (11) via the bus (15). The operating signal information stored in the 2-port memory (13a) is read by the fault diagnosis device (20) as needed, and stored in the status memory (23) via the bus (25). The 2-port memory (13a) can be accessed by two CPUs at the same time, so the fault diagnosis device (
20) can be accessed at any time, and the CPU (1
There is no need to wait for the access in 1) to end.

The failure diagnosis device (20) performs failure diagnosis of the mechanical device (80) with respect to preset diagnostic items, and includes a CPU (21), a memory (22) for storing system programs, etc., control information and It is equipped with a status memory (23) that stores operational information and a buffer memory (24) that stores diagnostic result information.

[0023] The CPU (21) controls the entire system according to the system program. Status memory (23)
As described above, stores the control information read from the 2-port memory (14a) and the operation information read from the 2-port memory (13a).

[0024] The buffer memory (24) is connected to the CPU (21).
), the diagnostic result information obtained as a result of the calculation is stored. The diagnostic result information stored in the buffer memory (24) is sent to the PC (1) via the buffer memory read line (27).
If there is a read request from the CPU (11) of 0, the data can be read at any time. This readout is performed by the CPU (1
This is executed by providing a buffer memory access instruction in the sequence program operated in step 1).

[0025] The CPU (21) is an output unit (14)
and the 2-port memory (14a) of the input unit (13).
) (13a), the information is read out and stored in the status memory (23).
Store in. Then, the information is compared with reference data read from the memory (22) to perform a failure diagnosis of the mechanical device (80). The obtained diagnosis result information is stored in the buffer memory (24). If a fault is detected as a result of the diagnosis, the PC (
10) and sends a signal to the CPU (11) of the CPU (11).
Sets the failure flag.

When the CPU (11) of the PC (10) recognizes that the failure flag is set, it reads out the diagnostic result information stored in the buffer memory (24) via the buffer memory read line (27). Then, based on the read diagnosis result information, the mechanical device (80) is stopped and other controls are performed.

When the reading of the diagnostic result information is completed, C
The PU (11) sends a signal to that effect to the CPU (21). Upon receiving the read end signal, the CPU (21) sends a signal to the CPU (11) again through the failure flag signal line (28) to reset the failure flag of the CPU (11).

FIG. 4(a) is a schematic explanatory diagram of a pusher constituted by a cylinder, and FIG. 4(b) is a time chart showing the operation of a limit switch for detecting the operation of the pusher.

The pusher (40) includes a cylinder (41) that is operated by hydraulic pressure, pneumatic pressure, etc. by operating a control valve (not shown), and a pressing member (43) fixed to the tip of the cylinder rod (42). It is prepared and configured. The limit switch (44) detects the return of the pressing member (43) to the original end, and the limit switch (45) detects the arrival of the pressing member (43) at the arrival end.

When the pusher (40) is controlled by the PC (10), when the forward output signal is sent from the PC (10) to the control valve, the pressure of oil, compressed air, etc. is generated from the A port inside the cylinder (41). Fluid is supplied, the cylinder rod (42) moves forward (protrudes), and the pressing member (43) attached to its tip reaches the position indicated by the broken line in FIG. 4(a). At that time, the pressing member (43) engages with the lever of the limit switch (45) on the arrival end side, and the limit switch (43) engages with the lever of the limit switch (45) on the arrival end side.
45) to 0N. In addition, as soon as the cylinder rod (42) starts moving forward, the engagement between the pressing member (43) and the lever of the limit switch (44) on the proximal end side is released, so the limit switch (44) is set to 0FF. Become.

When a retreat output signal is sent from the PC (10) to the control valve, pressure fluid is supplied from the B port to the inside of the cylinder (41), and the cylinder rod (42) is retreated (drawn in) as shown in FIG. Return to the position indicated by the solid line in (a). At that time, the pressing member (43) is pressed against the limit switch (4
4) and set the limit switch (44) to 0.
Set it to N. In addition, as soon as the cylinder rod (42) starts returning, the pressing member (43) and the limit switch (4
Since the engagement with the lever 5) is released, the limit switch (45) becomes 0FF.

In this way, the pressing member (43) reciprocates between the original end and the arrival end within a certain period of time, so whether or not the limit switches (44) and (45) are activated, the forward output signal or the backward output signal is determined. Both limit switches (
44) By measuring the time until the pusher (45) is switched and comparing it with a predetermined operating time, it is possible to detect a malfunction, that is, a failure of the pusher (40). Further, the location of the failure can be diagnosed depending on the situation.

Next, a failure diagnosis device (20
) will be explained based on the flowchart of FIG.

[0034] In step S1, the failure diagnosis device (20)
reads the control information output from the CPU (11) of the PC (10) and stored in the 2-port memory (14a) of the output unit (14). In the case of FIG. 4, for example, forward output information stored in the 2-port memory (14a) is read. Then, measurement of the operating time is started.

In step S2, the operation information input and stored in the two-port memory (13a) of the input unit (13) is read from the mechanical device (80). In the case of Figure 4,
For example, the pressing member (43) of the pusher (40) reads the operation information input and stored in the two-port memory (13a) by turning on the limit switch (45) on the arrival end side. Then, the measurement of the operating time is completed.

In step S3, the read control information and operation information are compared with reference information. In the case of Figure 4,
For example, the measured operating time is compared with a reference time.

In step S4, it is determined whether or not there is a failure as a result of the comparison. If it is determined that there is no failure, the operation is ended; if it is determined that there is a failure, the process jumps to step S5. In the case of FIG. 4, for example, it is determined whether the measured operating time is within a predetermined range with respect to the reference time. If it is within the predetermined range, it is determined that the operation of the pusher (40) is normal, and the operation ends. If it is not within the predetermined range, it is determined that there is a failure and the process jumps to step S5.

In step S5, failure diagnosis is performed based on the determination result. In the case of FIG. 4, for example, CPU (1
Even though the forward output signal is being output from 1),
If the limit switch (44) on the proximal end side does not turn off, it is diagnosed that the control valve is malfunctioning. If the limit switch (44) is turned OFF but the limit switch (45) on the arrival end side is not turned ON, diagnose that the pressing member (43) has stopped in the middle or the limit switch (45) is malfunctioning. .

Furthermore, if the limit switch (45) on the arrival end side does not turn off even though the CPU (11) is outputting a backward output signal, it is diagnosed that the control valve is malfunctioning. . Limit switch (45)
turned off, but the limit switch (44) on the proximal end
) is not turned on, it is diagnosed that the pressing member (43) has stopped in the middle or the limit switch (44) is malfunctioning.

Furthermore, the forward output signal is issued, the pressing member (43) moves forward, and the limit switch (45) on the arrival end side is activated.
) changes from OFF to ON, but if the limit switch (44) on the source end side remains ON, it is diagnosed that the limit switch (44) on the source end side has returned poorly. Similarly, a retreat output signal was issued, the pressing member (43) retreated, and the limit switch (45) on the arriving end side changed from OFF to ON, but the limit switch (44) on the originating end side remained ON. In this case, it is diagnosed that the limit switch (44) on the original end side has not returned properly.

In step S6, the diagnostic results are stored in the buffer memory (24). In step S7, the CPU (
11) to set the failure flag of the CPU (11). By setting the fault flag,
The CPU (11) recognizes that there is a failure and reads the diagnostic result information stored in the buffer memory (24).

In step S8, it is determined whether reading of the diagnostic result information has been completed. If it has not finished, wait until it has finished. If it is determined that the process has ended, the process jumps to step S9. When the reading of the diagnostic result information is completed, the CPU (11) of the PC (10) sends a reading completion signal to the CPU (21) of the failure diagnosis device (20).
(21) recognizes the end of reading by receiving the signal.

[0043] In step S9, the failure diagnosis device (20)
The CPU (21) sends a flag reset signal to the CPU (11) of the PC (10) via the failure flag signal line (28), resets the failure flag of the CPU (11), and ends the operation.

The diagnosis result is determined by the date of failure detection (year, month, day,
It is preferable to store information such as hours, minutes, seconds), a preset failure number, and comments in the buffer memory (23).
(See Figure 7).

In addition to the failure diagnosis of the reciprocating operation described above, it is also possible to simultaneously count the number of operations of both limit switches (44) and (45) and the control valve, and to buffer the measurement results of forward and backward operation times. It is preferable to By counting the number of operations, useful information can be obtained for maintenance work such as replacing parts and refueling according to the number of operations. Furthermore, if it is determined from the measured operating time data that the operating time is gradually increasing, it becomes possible to predict pressure leaks due to deterioration of parts such as packing. Therefore, it is preferable that the buffer memory (24) be approximately 64 kbytes so that all of this information can also be buffered. Also, buffer memory (
24) is preferably backed up by a battery.

FIG. 6 is a functional block diagram of the diagnostic item setting device of the present invention. According to this diagnostic item setting device,
Setting of failure diagnosis items performed by the failure diagnosis device (20) can be easily performed using a PC peripheral device such as a programming device.

The input section (30a) is used to input the contents to be set for the items for failure diagnosis, and for example, the keyboard (32) of the PC peripheral device (30) can be used. The display unit (30e) displays diagnostic items, for example, a CRT display device (30) of a PC peripheral device (30).
1) can be used. The diagnostic item information storage unit (30b) is
Stores information regarding items necessary for fault diagnosis.

The setting information generating section (30b) reads diagnostic item information from the diagnostic item information storage section (30b) and displays a list of diagnostic items on the display section (30e). In addition, the setting contents inputted from the input section (30a) are displayed on the display device (30e).
). Further, setting information is generated based on the read diagnostic item information and the input setting contents.

The setting information sending unit (30d) sends setting information regarding each diagnostic item generated by the setting information generating unit (30b) to the failure diagnosis device (20). Note that it is preferable to save this setting information on a floppy disk or print it out.

[0050] Also, if necessary, a failure diagnosis device (20
) is provided with a diagnostic result information reading section (30f) for reading the diagnostic result information obtained in the step (30f). In this way, the fault diagnosis device (2
The diagnostic result information stored in the buffer memory (24) of 0) can be read out and saved on a floppy disk or printed out.

[0051] The diagnostic item setting device (30) having the above configuration includes:
It may consist of a PC peripheral as a programming device for the PC (10), with a keyboard (32), a CRT display (31) and a floppy disk drive. When a diagnostic item setting program is stored on a floppy disk and the floppy disk is inserted into the floppy disk insertion slot (33) to start the diagnostic item setting program, the diagnostic items are displayed on the CRT display in the format shown in FIG. 7, for example. A list is displayed in (31).

In the diagnostic item setting table (50) in FIG. 7, the diagnostic items are output (52), source end (53), and arrival end (54).
, monitoring time (55), comment (56), failure number (5
7), and data can be entered into these items using the keyboard (32) for each item number (51).

The output (52) item sets the output signal to be output from the CPU (11) of the PC (10) to a specific device (control valve in FIG. 4) of the mechanical device (80). In the category of origin (53), mechanical equipment (80
) (in Figure 4, the limit switch (44)
)) Set the input signal sent from Arrival end (5
In item 4), the specific device (
In FIG. 4, the input signal sent from the limit switch (45) is set. In the monitoring time (55) item, the time for monitoring a specific device (the pusher (40) in FIG. 4) is set. In the comment (56) item, a comment indicating the details of the failure is set. In the failure number (57) item, a number corresponding to the failure details set in comment (56) is set. Note that (58) is the device symbol, (
59a) (59b), the signal changes from OFF to O.
N, a symbol indicating ON→OFF.

[0054] Furthermore, if a device-equipment definition table (60) as shown in FIG. 8 is displayed on the CRT display device (31) and a device name can be defined for each device name,
When setting each item of the output (52), source end (53), and arrival end (54) in the table (50) of FIG. 7, the device name can be entered, making the item settings even easier.

[0055] The aforementioned limit switches (44) (45)
), counting the number of operation of control valves, aggregating measurement results, etc., use the same method as above.

[0056] The setting information generated for the diagnostic item is
The fault diagnosis unit (20) is connected via the connection cable (34).
) and stored in the memory (22) of the fault diagnosis device (20). The failure diagnosis device (20) performs failure diagnosis based on the setting information.

The setting information can be obtained by inserting a floppy disk into the floppy disk insertion slot (33) of the diagnostic item setting device (30).
) and store it on that floppy disk for safe storage. Furthermore, there is no need to newly set diagnostic items at the time of the next failure diagnosis.

[0058]

[Effects of the Invention] According to the failure diagnosis device of the present invention, the PC
Failure diagnosis can be performed without increasing the scan time of the control means such as, and diagnostic results can be obtained quickly. Therefore, it is possible to quickly respond to failures. Further, according to the diagnostic item setting device of the present invention, it is possible to easily set items necessary for failure diagnosis. Furthermore, since diagnosis items can be set using a PC peripheral device, there is no need to prepare a dedicated device.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of a failure diagnosis device of the present invention.

FIG. 2 is a block diagram showing the configuration of an embodiment of a PC equipped with a failure diagnosis device of the present invention.

FIG. 3 is a schematic configuration diagram of the PC shown in FIG. 2;

FIG. 4(a) is a schematic explanatory diagram of a pusher constituted by a cylinder, and FIG. 4(b) is a time chart showing the operation of a limit switch for detecting the operation of the pusher.

FIG. 5 is a flowchart showing the operation of the failure diagnosis device of the present invention.

FIG. 6 is a functional block diagram of the diagnostic item setting device of the present invention.

FIG. 7 is an explanatory diagram of an example of a diagnostic item setting table displayed on a CRT display device.

FIG. 8 is an explanatory diagram of an example of a device-equipment definition table displayed on a CRT display device.

FIG. 9 is a conceptual diagram showing an example of a conventional method for diagnosing a failure of a mechanical device controlled by a PC.

FIG. 10 is a conceptual diagram showing another example of a conventional method for diagnosing a failure of a mechanical device controlled by a PC.

[Explanation of symbols]

10 Programmable controller 11 CP
U 12 Memory 13 Input unit 13a 2-port memory 14 Output unit 14a 2-port memory 15, 16 Bus 20 Fault diagnosis device 20a Control information storage section 20b Operation information storage section 20c Fault diagnosis section 20d Diagnosis result information storage section 20e Diagnosis result notification section 21 CPU 22 Memory 23 Status memory 24 Buffer memory 25, 26 Bus 27 Buffer memory read line 28 Failure flag signal line 30 Diagnosis item setting device 30a Input section 30b Setting information generation section 30c Diagnosis item information storage section 30d Setting information sending section 30e Display Section 30f Diagnosis result information reading section 31 CRT display device 32 Keyboard 33 Floppy disk insertion slot 34 Connection cable 40 Pusher 41 Cylinder 42 Cylinder rod 43 Pressing members 44, 45 Limit switch 50 Diagnosis item setting table 60 Device-equipment definition table 80 Mechanical equipment 81, 82 signal line

Claims (2)

[Claims] 1. A control information storage means that stores control information output from the control means and can be accessed simultaneously from two processors, and a control information storage means that stores operation information input to the control means and can be accessed simultaneously from two processors. operation information storage means; a failure diagnosis means for diagnosing a failure based on the control information and operation information stored in the control information storage means and the operation information storage means; and storage of diagnosis result information obtained by the failure diagnosis means. What is claimed is: 1. A failure diagnosis device comprising: a diagnosis result information storage means for notifying a control means of the diagnosis result; and a diagnosis result notification means for notifying a control means of the diagnosis result. 2. An input means for inputting contents to be set for diagnosis items, a display means, a diagnosis item information storage means for storing information regarding items necessary for failure diagnosis, and a diagnosis item information storage means for storing information on items necessary for failure diagnosis. A setting for reading out item information and displaying diagnostic items on the display means, displaying input information input by the input means on the display means, and further generating setting information based on the diagnostic item information and input information. A diagnostic item setting device comprising an information generating means and a setting information sending means for sending the setting information generated by the setting information generating means to a failure diagnosis means.