JPH0580887A - Wiring system for diagnostic bus - Google Patents

Abstract

PURPOSE:To prevent a package to be diagnosed from being inserted erroneously. CONSTITUTION:In Figure (A), mount decision is performed by sending machine number information from a diagnostic main device 102 to packages 103-108 to be diagnosed via a diagnostic bus 109, comparing and collating sent machine number information with the one connected to a circuit 121 for diagnosis of its own package, and returning a comparison result to the diagnostic main device 102. Figure (C) shows the case that the package 106 to be diagnosed and the package 107 to be diagnosed are arranged adversely. As a result, since the position of the pin 116 for diagnostic bus connection of the package 106 to be diagnosed is set differently from that of the pin 117 for diagnostic bus connection of the package 107 to be diagnosed, no connection to the diagnostic bus 109 can be performed, therefore, it is decided as no-mounting by the diagnostic main device 102.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diagnostic bus wiring system.

[0002]

2. Description of the Related Art A conventional diagnostic bus wiring system is shown in FIG.
As shown in (A) and FIG. 2 (C), the diagnostic main device 202 and the packages to be diagnosed 203 to 208 are mounted on the device casing 201.
The diagnostic bus connecting pins 213 to 218 are provided at the same position for each package to be diagnosed 203 to 208, and the diagnostic bus 209 is connected to the diagnostic bus connecting pins 213 to 218. As for the setting of the machine number information, regarding the package to be diagnosed 208, the machine number information is set by the dip switch 228 in the package to be diagnosed 208 as shown in FIG. As shown in C),
The machine number information was set in the machine number information setting positions 233 to 238 on the back substrate.

[0003]

In this conventional diagnostic bus wiring system, since it is necessary to reset the machine number information of each package to be diagnosed every time the package to be diagnosed is replaced, tedious and erroneous operation is performed. There is a possibility that there is a possibility that there is a possibility that it is not mounted, but the system that sets the machine number information at the machine number information setting position on the backside board can recognize the difference in the package to be diagnosed and it is regarded as normal. There was a point.

An object of the present invention is to eliminate mistakes in packages to be diagnosed.

[0005]

In order to achieve the above object, the present invention provides one diagnostic main unit and a plurality of packages to be diagnosed in a device casing, and the packages to be diagnosed are for connecting a diagnostic bus. In the wiring method of the diagnostic bus in which pins are provided and the diagnostic main unit and the diagnostic bus connection pins are connected by the diagnostic bus, the positions of the diagnostic bus connection pins of each package to be diagnosed are different.

[0006]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention. As shown in FIG. 1A, a main diagnostic device 102 and packages 103 to 108 to be diagnosed are provided in a device casing 101, and the diagnostic packages 103 to 108 are diagnosed at different positions and aligned on a straight line. Bus connection pin 1
13 to 118 are provided, and diagnostic bus connection pins 113 to 11 are provided.
8 was connected to the diagnostic bus 109. And, the setting of the machine number information is carried out at the machine number information setting positions 133 to 1 on the rear substrate.
The machine number information was set to 38.

FIG. 1B shows the package 108 to be diagnosed. The package 108 to be diagnosed is provided with a diagnostic bus connection pin 118, a diagnostic circuit 121, and a machine number information connection pin 122.

The diagnosis method is as follows. The diagnosis main unit 102 sends the machine number information to each of the packages to be diagnosed 103 to 108 via the diagnostic bus 109, and each of the packages to be diagnosed 103 to 108.
At 108, the sent machine number information is compared and collated with the machine number information connected to the diagnostic circuit 121 of the own package, and the comparison result is returned to the diagnosis main device 102,
This is to determine the mounting.

FIG. 1C shows the case where the package 106 to be diagnosed and the package 107 to be diagnosed in FIG. As can be seen from this figure, the position of the diagnostic bus connection pin 116 of the package under diagnosis 106 and the diagnostic bus connection pin 1 of the package under diagnosis 107
Since the position of 17 is different from the position of the diagnostic bus 109, it is impossible to connect to the diagnostic bus 109 in a wrong arrangement, and the diagnostic main unit 102 determines that the device is not mounted.

[0011]

As described above, according to the present invention, since the positions of the diagnostic bus connection pins in the packages to be diagnosed are different, when the package to be diagnosed is inserted in the wrong position, it is possible to judge whether the package is mounted or not. Since it is separated from the diagnostic bus, it is unimplemented in terms of the implementation determination, and the non-implementation is notified to the diagnostic main device, so that it is possible to detect an abnormality.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a conventional diagnostic bus wiring system.

[Explanation of symbols]

 101 Device Case 102 Diagnostic Main Device 103-108 Diagnostic Package 109 Diagnostic Bus 113-118 Diagnostic Bus Connection Pin 121 Diagnostic Circuit 122 Machine Number Information Connection Pin 133-138 Machine Number Information Setting Position

Claims (1)

[Claims] 1. A diagnostic main unit and a plurality of packages to be diagnosed are provided in a device casing, and a diagnostic bus connecting pin is provided in the package to be diagnosed, and the diagnostic main unit and the diagnostic bus connecting pin are connected to the diagnostic bus. In the wiring method of the diagnostic bus connected by, the position of the diagnostic bus connecting pin of each package to be diagnosed is different.