JPS6378242A - Diagnosing interface system - Google Patents

Abstract

PURPOSE:To facilitate cause investigation when a trouble occurs by returning trouble data to show the contents of the trouble to a diagnosing device when the trouble occurs at a diagnosed device. CONSTITUTION:When a diagnosed device address is sent from a diagnosing device through a diagnosis writing data interface 31 to a diagnosed device 21, the address is inputted into a comparing circuit 6. When the address is coincident to its own device address and the result of a detecting circuit 13 is normal, for a selecting circuit 4, a diagnosed device address is outputted. Thus, it can be known that the diagnosing device can diagnose. At the time of diagnosing, the output of the comparing circuit 6 comes to be off, and when the result of the detecting circuit 13 is normal, a trouble bit comes to be off, diagnosing reading data 12 are selected and the diagnosing is executed. When the result of the detecting circuit 13 is abnormal, a trouble bit 10 comes to be on and the trouble data of a trouble data generating circuit 5 are outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a diagnostic interface method for an information processing system.

[Conventional technology]

The conventional diagnostic interface was published in Japanese Patent Application Laid-Open No. 61-492.
As in Publication No. 43, when the device to be diagnosed is in a diagnosable state, a response signal is returned in response to the designation of the device to be diagnosed by the diagnostic device, and when the device is in a state where diagnosis is not possible, a response signal is returned in response to the designation of the device to be diagnosed by the diagnostic device. This method was designed to shorten diagnostic time without sending back response signals. However, when the device to be diagnosed is in a state where it cannot be diagnosed, no consideration has been given to a means for knowing the details.

[Problem that the invention seeks to solve]

In the conventional diagnostic interface method, when the device to be diagnosed is in an undiagnosable state as described above, there is a problem in that it takes time to investigate the cause because no consideration is given to a means to know the cause.

SUMMARY OF THE INVENTION An object of the present invention is to provide a diagnostic interface method that solves the above problems and facilitates fault isolation.

[Means for solving problems]

The purpose of the above is that when the diagnostic device recognizes that the device to be diagnosed is its own device in response to the specification of the device to be diagnosed, the diagnostic device is supplied from the diagnostic device in order to identify whether or not the device to be diagnosed is connected and whether it is in a diagnosable state. When an error occurs in the data supplied from the diagnostic device or a fault occurs in the device being diagnosed, the fault data is returned to the diagnostic device to notify the diagnostic device of the details of the fault. Also, during diagnosis, the diagnostic results can be collected continuously by providing the device to be diagnosed with a function of sending the diagnostic results back to the diagnostic device.

[Effect]

When the diagnostic device specifies the device to be diagnosed, the device to be diagnosed recognizes that it is its own device and sends the data supplied from the diagnostic device back to the diagnostic device as is, and the diagnostic device recognizes that the device to be diagnosed is connected and performs diagnosis. know that it is possible. Furthermore, when the device to be diagnosed is not connected, the data supplied from the diagnostic device is not returned, so the diagnostic device knows that the device to be diagnosed is not connected. In addition, if the device under diagnosis A detects an error in the data from the diagnostic device or a fault occurs in its own device, the device to be diagnosed returns the fault data to the diagnostic device, and the diagnostic device Know the content. In this way, if the device to be diagnosed is at fault, the diagnostic device can recognize the details of the fault.

〔Example〕

The first embodiment of the present invention will be described below with reference to FIG. 2.

FIG. 1 is a block diagram showing one embodiment of the present invention. In the diagnostic interface method shown in FIG. 1, the diagnostic device 1 uses the diagnostic data interface 3 to
2...Writes and reads data to and from 2N and executes diagnosis.

FIG. 2 is a diagram showing a diagnostic data interface section of the device to be diagnosed in FIG. 1. As an example, the device to be diagnosed 21 will be explained. The diagnostic data interface section of the device to be diagnosed shown in FIG. The self-device address register 7 stores @device address data, and the diagnostic device address data supplied from the diagnostic device 1 via the diagnostic write data interface 31 and the device address data stored in the self-device address register 7. A fault ratio circuit 6 that generates an ON signal when the data matches the current data, and a diagnostic device! a detection circuit 13 that detects an error in the data supplied from t1 or a fault in the device to be diagnosed 21; and a fault data generation circuit 5 that generates fault data to inform the diagnostic device 1 of the content of the fault in the fi/communication 21 to be diagnosed. The diagnostic read data 12 is sent to the diagnostic device 1 via the diagnostic data interface 32 during diagnosis, and when the comparison circuit 6 generates an ON signal, the diagnostic read data 12 is sent to the diagnostic device 1 via the diagnostic data interface 32. [1 Diagnostic signature data interface 51
The selection circuit 4 selects the address data of the device to be diagnosed supplied via the detection circuit 13, and the fault data generated by the fault data generation circuit 5 when the result of the detection circuit 13 is abnormal.

The operation of the circuit shown in Figure 2 will be briefly explained. Diagnostic device+
When the diagnosed device address is sent from ti'1 to the diagnosed device 21 via the diagnostic write data interface 31, the self-device address register 7 stored in advance
It is input to the comparator circuit 6 together with the own device address stored in , and if they match, the output is turned on.

Here, if the result of the detection circuit 13 is normal, the fault bit 1
0 is turned off, and the diagnosed device address supplied via the diagnostic write data interface 51 is output as the output of the selection circuit N4. The diagnostic device address output from the selection circuit 4 is sent back to the diagnostic device 1 via the diagnostic read data interface 32. Thereby, the diagnostic device 1 knows that the device to be diagnosed 21 is connected and ready for diagnosis. On the other hand, when the device to be diagnosed 21 itself is not connected, the diagnostic device (2) knows that the device to be diagnosed 21 is not connected because the device address to be diagnosed is not returned. At the time of diagnosis, the output of the comparison circuit 6 is turned off, and if the result of the detection circuit 13 is normal, the fault bit 10 is also turned off, so that the diagnosis read data 12 is selected as the output of the selection circuit 4 and the diagnosis can be executed.

Also, if the result of the detection circuit 13 is abnormal, the fault bit 10
is turned on, and the fault data generated by the fault data generation circuit 5 is output as the output of the selection circuit 4. This allows the diagnostic device 1 to know the details of the fault in the device to be diagnosed ft21.

〔Effect of the invention〕

As described above, according to the present invention, since the diagnosis device can know the details of the failure of the device to be diagnosed, it is possible to easily determine the cause of the failure in four meals.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the present invention, and FIG. 2 is a partial circuit diagram of the device to be diagnosed q shown in FIG. 1... Diagnosis device, 21. 22-2N... Diagnosed device, 3... Diagnosis data interface, 31... Diagnosis [
1 included data interface, 32... diagnostic read data interface, 4... selection circuit, 5... failure data generation circuit, 6... comparison circuit, 7... own device address register, 8... Diagnostic data interface receiver, 9... Diagnostic data interface driver, 10
...Fault bit, 11...Diagnostic write data, 12.
...Diagnostic read data, 13...detection circuit. (、゛

Claims (1)

[Claims] 1. In a diagnostic interface method in which multiple devices to be diagnosed are branch-connected to a diagnostic device, the device to be diagnosed recognizes that the device to be diagnosed is its own device based on the designation of the device to be diagnosed by the diagnostic device. and a means for detecting when an error occurs in the data supplied from the diagnostic device to the device to be diagnosed, or when a failure occurs in the device to be diagnosed, and detects the error as pre-processing for diagnosis. When the diagnostic device specifies the device to be diagnosed and recognizes that the device to be diagnosed is its own device, and the detection means does not recognize any fault, it sends the data specifying the device to be diagnosed supplied from the diagnostic device as a response signal. The data is sent back to the diagnostic device as is, and at the time of diagnosis, the data of the diagnosis result is returned to the diagnostic device, and if a fault is recognized by the detection means during pre-processing or diagnosis, fault data indicating the details of the fault is sent back to the diagnostic device. 1. A diagnostic interface system characterized by comprising means for generating and returning the generated interface to the diagnostic device.