JPH052205U - Fault diagnosis device - Google Patents

Abstract

(57) [Summary] [Purpose] When a malfunction of the numerical control device occurs, reproduce the state of the numerical control device before and after the problem occurs,
To be able to easily analyze the failure status. [Configuration] The host controller can stop sampling the internal data of the numerical control device when a problem such as an alarm occurs, and by sending the sampled internal data of the numerical control device to the numerical control device, The state of the numerical control device at the time of sampling can be reproduced. [Effect] There is an effect that the operator can easily and quickly know the state of the numerical control device before and after a problem such as an alarm occurs.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to fault diagnosis of factory automation equipment.

[0002]

[Prior Art]

 FIG. 6 is a diagram showing a conventional method of connecting a host controller and a numerical controller (hereinafter abbreviated as NC). In the figure, 1 is a host controller, 2 is an NC, and 3 is a host controller 1 and NC2. It is an information communication network. FIG. 7 is a block diagram showing a part of the functional configuration of a conventional host controller. In the figure, 4 is a central processing unit (hereinafter abbreviated as CPU). Reference numeral 5 is a memory, 6 is an information communication network interface, 7 is an input device, 8 is an input device interface, 9 is a display device, 10 is a display device interface, and 11 is a signal line connecting between the functional blocks.

Next, the operation will be described. In the system in which the host controller 1 and a plurality of NCs 2 are connected by the information communication network 3 as shown in FIG. 6, the failure diagnosis of the NC 2 is performed as follows. That is, the host controller 1 periodically samples and collects the internal data of the NC 2 through the information communication network 3, and stores the data in the internal memory of the host controller 1. When a malfunction such as an alarm occurs in the NC 2, the malfunction (fault) is diagnosed by checking the sampling data of the malfunctioning NC stored in the internal memory of the host controller 1. It was

More specifically, in the host controller 1 shown in FIG. 7, the internal data of the NC periodically sampled by the CPU 4 passes through the information communication network 3, the information communication network interface 6, and the signal line 11. Stored in the memory 5. In memory 5, as shown in FIG. 8, a certain memory area is allocated to each NC. For example, in the case of the first NC, the first sampling data is assigned to the block of address A (address The next sampling data is stored in the block of address A + B in the area from A to address A + B-1). In this way, the sampling data is sequentially stored, and when the last block is stored, the block at the address A is stored again (overwritten). Therefore, the data sampled at the last M + 1 times is stored in the sampling data storage area of each NC. FIG. 9 shows the method of processing the sampling data once for the first NC.

The process of FIG. 9 is activated at regular intervals. In STEP 1 of FIG. 9, the internal data is sampled from the first NC and stored in the block of the address variable x (the block corresponding to the storage order of the sampling data at that time). In STEP2, it is determined whether or not the block of x is the final block of the sampling data storage area of the first NC, and if it is not the final block, x + B is substituted for x (STEP3). If it is the final block, A is substituted for x (STEP 4). When a trouble such as an alarm occurs in the NC, the operator designates the sampling data storage area of the NC to be investigated by the input device 7 in the host controller 1 shown in FIG. The designation is recognized by the CPU 4 through the signal line 11 and the input device interface 8, the data in the designated sampling data storage area is read from the memory 5, and passed through the signal line 11 and the display device interface 10. It is displayed on the display device 9. Then, the operator analyzes the displayed data and determines the content of the defect.

[0006]

[Problems to be solved by the device]

 Since the conventional failure diagnosis device is configured as described above, the sampling data before and after the occurrence of a malfunction such as an alarm may already be overwritten and deleted. In addition, the operator must directly analyze the sampling data to determine the details of the problem, which requires advanced expertise and takes a lot of time.

The present invention has been made to solve the above-mentioned problems, and it is possible to understand the state of the NC before and after the occurrence of a defect such as an alarm, and to easily and quickly determine the content of the defect. The purpose is to obtain the device.

[0008]

[Means for Solving the Problems]

 The failure diagnosis apparatus according to the present invention is a means for stopping sampling of internal data of an NC that has caused a failure when a failure such as an alarm occurs, and a means for causing the NC to reproduce the state of the NC before and after the failure occurs. It is equipped with.

[0009]

[Action]

 An alarm flag is provided so that it is turned on when a problem such as an alarm occurs. Then, when the alarm flag is turned on, the sampling is stopped for a set number of times. As a result, the state of the NC before and after the malfunction occurred can be stored. Also, by sending the sampling data before and after the occurrence of the failure to the NC where the failure occurred each time requested by the NC where the failure occurred, the situation before and after the occurrence of the failure can be confirmed. I made it possible to reproduce at any speed, such as stopping, making it very slow, making other parts very fast. This made it easier to understand the situation before and after the problem occurred.

[0010]

【Example】

 Example 1. The configuration of the apparatus of the embodiment of the present invention is the same as that of the conventional FIG. 6 and FIG. 1, FIG. 2, FIG. 3, and FIG. 5 show processing performed on the first NC 2 inside the host controller 1. FIG. 4 shows the processing performed inside the first NC2.

The process of FIG. 1 is started when the power of the host controller 1 is turned on or when a reset switch (hereinafter abbreviated as SWRST) is turned from OFF to ON. In STEP 1, A is assigned to the address variable x, 0 is assigned to the sampling number counter y after the occurrence of a defect, and the alarm flag is turned off.

The process of FIG. 2 is started at a constant cycle. In STEP 1, y> k (k is a constant that determines the number of times of sampling after occurrence of a defect, and the operator sets an arbitrary value. The cause of the defect is investigated by comparing the conditions before and after the defect occurs. However, depending on the content of the failure, which sampling data before and after the occurrence of the failure is more necessary depends on the setting of k). If true, the processing of FIG. 2 is not performed. If false, move to STEP 2. In step P2, internal data is sampled from the first NC and stored in the block of the address variable x. In STEP 3, it is determined whether or not the block of x is the final block of the sampling data storage area of the first NC, and if it is not the final block, x + B is substituted for x (STEP 4). If it is the final block, A is substituted for x (STEP 5). In STEP6, it is determined whether or not the alarm flag is turned ON (see FIG. 3). If it is ON, the process proceeds to STEP7, and if it is not ON, the process of FIG. 2 is ended. In STEP 7, y + 1 is substituted for y.

The process of FIG. 3 is started at a constant cycle. In STEP1, the internal data of the first unit NC is sampled, the alarm-related data in it is checked, and if an alarm occurs, move to STEP2. If no alarm occurs, The process of FIG. 3 is ended. In STEP 2, the alarm flag (OFF if no alarm occurs, turn ON when an alarm occurs) is turned ON.

The process of FIG. 4 is periodically started only when the first NC is brought into the failure diagnosis state. In STEP 1, it is determined whether or not the defect reproduction switch (hereinafter abbreviated as SWDPY) is turned from OFF to ON. If it is turned from OFF to ON, the process proceeds to STEP 2, and if not from OFF to ON, the processing of FIG. 4 is performed. end. In STEP 2, the upper controller 1 is requested to send the sampling data of the first NC stored in the memory 5 of the upper controller 1 to the first NC. At STEP 3, it is determined whether the sampling data requested at STEP 2 has arrived. If it arrives, move to STEP 4, and if not, wait until it arrives. In STEP 4, the sampling data sent from the host controller 1 is used to recreate the state of the NC at the time of sampling (including not only the internal state but also the display).

The process of FIG. 5 is started when the sampling data is requested from the first NC in STEP 2 of FIG. In STEP 1, the sampling data of the block of the address variable Z in the sampling data storage area of the first NC (the address variable Z has changed from the state in which the first NC is not in the diagnostic state to the state in the diagnostic state). At this time, the value of the address variable X is substituted.) To the first NC. In STEP2, it is determined whether Z is the final block, and if it is not the final block, the process proceeds to STEP3, and if it is the final block, the process proceeds to STEP4. In STEP 3, Z + B is substituted for Z. In STEP 4, A is substituted for Z. Although the processing for the first NC has been described above, the same processing is performed for the second and subsequent NCs.

Example 2. In the above-described embodiment of the present invention, the target of the failure diagnosis is the NC, but the invention can be similarly applied to any other factory automation equipment. In that case, the part described as NC in the above embodiment may be replaced with the factory automation device. The information communication network 3 shown in FIG. 6 is of a type in which the host controller 1 and NC2 are connected to one information communication network, but what type of information communication network is used in the present invention? May be

Further, in the above-described embodiment, the timing at which the host controller 1 stops sampling the internal data of the NC 2 is set when a malfunction such as an alarm occurs, but when another condition set by the operator is satisfied. It can also be done easily. The description of “alarm” in FIGS. 1, 2 and 3 may be replaced with “condition satisfied”.

[0018]

[Effect of the device]

 As described above, according to the present invention, it is possible to stop the host controller 1 from sampling the internal data of the NC2 when a problem such as an alarm occurs and send the sampled internal data of the NC2 to the NC2. , NC2 can reproduce the state of NC2 at the time of sampling, so that the state of NC before and after the occurrence of a defect such as an alarm can be easily and quickly known to the operator.

[Brief description of drawings]

FIG. 1 is a diagram showing initialization processing of variables and flags of a host controller according to an embodiment of the present invention.

FIG. 2 is a diagram showing a process in which a host controller samples and stores internal data of an NC according to an embodiment of the present invention.

FIG. 3 is a diagram showing a process in which a host controller turns ON an alarm flag according to an embodiment of the present invention.

FIG. 4 is a diagram showing a process of reproducing the state at the time of sampling with NC sampling data according to an embodiment of the present invention.

FIG. 5 is a diagram showing a process of sending internal data sampled from the NC to the NC in response to a request from the NC of the host controller according to the embodiment of the present invention.

FIG. 6 is a diagram showing a method of connecting a host controller and an NC in a diagram showing a conventional failure diagnosis device.

FIG. 7 is a block diagram showing a part of the functional configuration of a host controller in a diagram showing a conventional failure diagnosis device.

FIG. 8 is a diagram showing a sampling / data-related memory area of a host controller in a diagram showing a conventional failure diagnosis device.

FIG. 9 is a diagram showing a process in which a host controller samples and stores internal data of an NC in a diagram showing a conventional failure diagnosis device.

[Explanation of symbols]

 1 Upper controller 2 Numerical control device 3 Information communication network

Claims (1)

[Claims for utility model registration] [Claim 1] A factory automation device such as a numerical control device and a host controller are connected by an information communication network, and the host controller cycles internal data of the factory automation device such as a numerical control device. Means for sampling and storing, and means for stopping sampling under conditions set by the operator such as occurrence of trouble,
From the means to send the sampling data stored by the host controller to the factory automation device such as the numerical control device to reproduce the state of the factory automation device such as the numerical control device before and after the satisfaction of the sampling stop condition set by the operator. Failure diagnosis device.