JPS6149243A - Diagnostic interface system - Google Patents

Abstract

PURPOSE:To shorten the diagnosing time by producing the answer signals in response to the commands given from a diagnosing device and transmitting the answer signal to the diagnosing device when no fault signal is produced in case the data given from the diagnosing device has an error. CONSTITUTION:A diagnosing device 1 write and reads data to and out of devices 2-N to be diagnosed through an interface 10. These devices 2-N report the presence or absence of connection of their own devices as well as the generation of faults to the device 1 via the diagnosis enable signal 11. Here a comparator 21 compares the address data on the devices to be diagnosed which are given from the device 1 with the data on an address register 23 of own device. Then an FF22 is turned on with the data error detecting signal sent from the device 1 and the fault detecting signal of the device 2. An AND between the output signals of the comparator 21 and the FF22 is secured through an AND gate 20. Then the signal 11 is turned on and off.

Description

TECHNICAL FIELD The present invention relates to a diagnostic interface method for an information processing system.

(Prior Art) In the conventional diagnostic interface method, the diagnostic device is not equipped with a means to immediately determine whether or not the specified device to be diagnosed is connected to the diagnostic interface. A specific register is read to determine whether there is a connection.

Furthermore, the conventional diagnostic interface system does not have a means for immediately discovering errors in data sent to a device to be diagnosed or failures occurring on the device to be diagnosed during diagnosis. For this reason, the diagnosing device could not know that a fault had occurred until the data was read from the device to be diagnosed some time after the data had been sent out.

As described above, the conventional diagnostic interface method has the drawback that it takes time for the diagnostic device to know whether the device to be diagnosed is connected or not and whether a fault has occurred, so that the time required to execute the diagnosis is also increased.

(Objective of the Invention) The purpose of the present invention is to add a new signal line on the diagnostic interface to indicate that the designated device to be diagnosed is connected to the diagnostic interface and that the device to be diagnosed is operating normally. It is an object of the present invention to provide a diagnostic interface system that can shorten the diagnostic time during diagnosis by providing the diagnostic interface method.

(Structure of the Invention) The device of the present invention uses a response signal that generates a response signal from a designated device to be diagnosed in response to a designation from the diagnostic device in a diagnostic interface system in which a plurality of devices to be diagnosed are branch-connected. and a fault signal generating means for generating a fault signal when an error 9 occurs in data supplied from the diagnostic device to the device to be diagnosed or when a fault occurs in the device to be diagnosed. , signal processing means that receives the response signal and blocks the response signal when the fault signal occurs and passes the response signal when the fault signal does not occur; and the signal processing means of the plurality of devices to be diagnosed. and a signal processing means for supplying an output signal r to the diagnostic device.

(Example) Next, the present invention will be explained in detail with reference to the drawings. 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 lr
The i-interface 10 allows the device to be diagnosed 2゜3...
...Data is input and read from N.

The devices to be diagnosed 2.3, . . . .

FIG. 2 shows a partial circuit diagram of the device to be diagnosed in FIG. As an example, the device to be diagnosed f2 will be explained.

A part of the circuit of the device to be diagnosed 2 shown in FIG. The comparison circuit 21 compares the address data with the data stored in the own device address register 23 and generates the ON signal 1g when they match, and turns ON by the failure detection signal when a failure occurs in the device to be diagnosed 2. In addition, when an error occurs in the data supplied via the interface 10, the diagnosis signal is turned on by the flip-flop 22, the output signal of the comparison circuit 21, and the output signal of the 7-lip flop 22 ( The gate is turned on when the flip-flop 22 is off, and is turned off when the flip-flop 22 is on.

Next, the operation of the circuit shown in FIG. 2 will be explained. Diagnostic device 1
When the device address to be diagnosed is sent from the interface 10 to the device to be diagnosed 2, it is compared with the device address stored in the device address register 23 which is preliminarily memorized. If these match, the output is turned on. If the flip-flop 22 is off, the output diagnosable signal 11 of the AND gate 20 is turned on, and the diagnostic device 1 knows that the device to be diagnosed 2 is connected. On the other hand, if the results of the comparison circuit 21 do not match, if the flip-flop 22 is on, or if the device to be diagnosed 2 itself is not connected, the diagnosable signal 11 is turned off and the device to be diagnosed! Know that t2 is not connected. In addition, in the diagnosis intermediate damage diagnosis device 2, the diagnosis yfr equipment f
If an error is found in the data from tl or a failure occurs in the own device, the shift flip-flop 22t is turned on by the error detection signal or failure detection signal. As a result, the output of the computer game 20, that is, the diagnosable signal 11 is turned off. The diagnostic device 1 detects the device to be diagnosed 2 due to the diagnosable signal 11 being turned off during diagnosis.
learn that a problem has occurred.

(Effects of the Invention) The present invention includes a diagnosable signal between a diagnostic device and a device to be diagnosed. By providing i-, a diagnosis can be made in a short time for the device to be diagnosed, which has the effect of shortening the diagnostic time at the time of diagnosis.

- Explanation of the Surrounding Room 417r FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a partial circuit diagram of the patient diagnosis Vr device shown in FIG. 1.

1... Diagnosis fdT device, 2.3... N...
...Diagnosed device, 20...And gate, 21
... Comparison circuit, 22 ... Flip flow circuit, 23 ... Own device address register.

Figure 1 Kaya 2 diagram

Claims (1)

[Scope of Claims] A diagnostic interface system in which a plurality of devices to be diagnosed are branch-connected, comprising: response signal generating means for generating a response signal from a designated device to be diagnosed in response to a designation from the diagnostic device; a fault signal generating means for generating a fault signal when an error occurs in data supplied from the diagnostic device to the device to be diagnosed or a fault occurs in the device to be diagnosed; and supplying the response signal. signal processing means for blocking the response signal when the fault signal occurs and passing the response signal when the fault signal does not occur; A diagnostic interface method comprising: signal supply means for supplying a signal to a diagnostic device.