JP2001251255A - Package identification system, and detection system for wrong mounting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide detection technology for a package that is mounted in a physical slot and requires no power supply and that can inexpensively configure a package identification system. SOLUTION: The package identification system has a physical slot, through which a 1st package whose 1st and 2nd terminals are short-circuited is loaded or a 2nd package, whose 1st and 3rd terminals are short-circuited is loaded, an inversion means for inverting a received signal and outputs the inverted signal to the 3rd terminal, an output means that outputs a prescribed signal to the 2nd terminal and the inverting means, and a means that identifies which of the 1st and 2nd packages is loaded to the physical slot, on the basis of the signal outputted from the 1st terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for detecting erroneous mounting of a package (PKG) such as a transmission device, and particularly, when two types of packages are mounted in the same physical slot, one of the two types is used. The present invention relates to a technology for detecting whether a package is mounted.

[0002]

2. Description of the Related Art Package (PK) in the prior art
The technique for detecting the erroneous mounting of G) will be described with reference to FIGS.

First, a first prior art for detecting erroneous mounting of a package will be described with reference to FIG.

The first prior art includes a physical slot 210 in which a package is loaded, an erroneous mounting detection circuit 220 for detecting whether the package loaded in the physical slot 210 is a preset package, Slot 2
A PKG identification number request signal is output to the package loaded in the physical slot 210 to monitor the package loaded in the physical slot 210;
0 and a package PKG2 loaded in the physical slot 210.
40. And PKG230,
And a PKG 240 that generates a different PKG identification number for each package by a dip switch or the like, and an input from the PKG identification number generation circuit when a PKG identification number request signal is input from the erroneous mounting monitoring circuit 221. The PKG identification number is incorrectly mounted on the monitoring circuit 22.
And a PKG identification number output circuit for outputting the PKG identification number to the PKG identification number output circuit.

Next, a second prior art will be described with reference to FIG.

The second prior art includes a physical slot 310 in which a package is loaded, an erroneous mounting detection circuit 320 for detecting whether the package loaded in the physical slot 310 is a preset package, An erroneous mounting monitoring circuit 321 that monitors a package loaded in the physical slot 310, and a PK output from the erroneous mounting monitoring circuit 321.
A selection circuit 322 selects one of the PKG identification signal a and the PKG identification signal b input from the package via the physical slot 310 in accordance with the G mounting signal, and outputs the selected signal to the erroneous mounting monitoring circuit 321. Was.

Next, the operation of the second prior art will be described.

First, information indicating which of the PKG 330 and the PKG 340 is to be mounted as a regular package is set in the erroneous mounting monitoring circuit 321.

Next, the erroneous mounting monitoring circuit 321 selects a PKG mounting signal indicating which of the PKG 330 and the PKG 340 is to be mounted based on the set information.
22.

When the input PKG mounting signal indicates that the PKG 330 is mounted as a regular package, the selection circuit 322 outputs the PKG identification signal a to the erroneous mounting monitoring circuit 32.
Output to 1. Further, the selection circuit 322 outputs the input P
When the KG mounting signal indicates that the PKG 340 is mounted as a regular package, the PKG identification signal b is output to the erroneous mounting monitoring circuit 321.

When it is set that the PKG 330 is mounted as a legitimate package, the erroneous mounting monitoring circuit 321 determines that the preset package is mounted if the signal received from the selection circuit 322 is the PKG identification signal a. . If the signal received from the selection circuit 322 is not the PKG identification signal a, it is determined that a preset package is not mounted.

Alternatively, if the PKG 340 is set to be mounted as a regular package and the signal received from the selection circuit 322 is the PKG identification signal b, the erroneous mounting monitoring circuit 321 determines that the predetermined package has been mounted. to decide. The signal received from the selection circuit 322 is PKG
If it is not the identification signal b, it is determined that the preset package is not mounted.

[0013]

However, in the first prior art described above, the P package mounted on the package (PKG) side
There is a problem that the scale of the KG identification number output circuit is large and expensive.

In addition, it is necessary to mount a PKG identification signal output circuit on a package in which only an optical passive component such as an optical coupler is mounted, and it is necessary to form a circuit with electric components on the package side.

In order to solve the problems of the first prior art, the above second prior art has been proposed.

However, in the second prior art, it is necessary to mount the selection circuit 322 on the erroneous mounting detection circuit 320, that is, the circuit size is large and the cost is high.

Accordingly, an object of the present invention is to provide a technology capable of detecting an erroneous mounting of a package in which a package mounted in a physical slot does not require a power source and a system can be configured at a low cost. is there.

[0018]

An object of the present invention is to provide a system for identifying a package, the system comprising: a first package in which a first terminal and a second terminal are short-circuited; A physical slot in which a second package in which a terminal and a third terminal are short-circuited is loaded, and an inverting unit that inverts an input signal and outputs the inverted signal to the third terminal, The second terminal, and an output unit that outputs a predetermined signal toward the inverting unit, and based on the signal output from the first terminal, the first package or the second package Means for identifying which of the physical slots is loaded in the physical slot.

With this configuration, the system can be configured at low cost.

Particularly, the inverting means is means for inverting the signal logic of an input signal and outputting the inverted signal to the third terminal.

For example, the inverting means can be constituted by an inexpensive inverter.

Further, the above object is a system for identifying a package, the system comprising: a first package in which a first terminal and a second terminal are short-circuited; The second package in which the terminal is short-circuited, the first package, or the physical slot in which the second package is loaded, and the signal logic of the input signal is inverted. Inverting means for outputting to a third terminal, output means for outputting a signal of a predetermined signal logic to the second terminal, and the inverting means, and an output means for outputting a signal output from the first terminal. If the signal logic is the same as the signal logic of the signal output by the output means, the package loaded in the physical slot is identified as the first package, and is output from the first terminal. Signal If the logic is the same as the signal logic of the signal output by the inverting means, the package loaded in the physical slot has means for identifying the package as the second package. Resolved by the identification system.

With this configuration, the package does not need a power supply for notifying the package of the identification.

[0024] Further, the above object is a system for detecting erroneous mounting of a package, wherein the system comprises: a first package in which a first terminal and a second terminal are short-circuited; A physical slot in which the second package in which the third terminal and the third terminal are short-circuited is loaded, and an inverting means for inverting an input signal and outputting the inverted signal to the third terminal, A second terminal, and an output unit that outputs a predetermined signal to the inversion unit, and that a regular package loaded in the physical slot is the first package or the second package. Storage means for storing information to be indicated, and a signal output from the first terminal, based on the information stored in the storage means,
Means for detecting whether or not the package loaded in the physical slot is a legitimate package.

With this configuration, the system can be configured at low cost.

In particular, the inversion means is means for inverting the signal logic of an input signal and outputting the inverted signal to the third terminal.

For example, the inversion means can be constituted by an inexpensive inverter.

Further, the above object is a system for detecting erroneous mounting of a package, the system comprising: a first package in which a first terminal and a second terminal are short-circuited; And the third terminal is short-circuited with the second package, the first package, or the physical slot in which the second package is loaded, and the signal logic of the input signal is inverted. An inverting means for outputting a signal to the third terminal; an output means for outputting a signal of a predetermined signal logic to the second terminal and the inverting means; Is a first package or a storage unit in which signal logic indicating that the package is the second package is stored, and a signal logic of a signal output from the first terminal is stored in the storage unit. Remembered If it is the same as the signal of the signal logic, packages that are loaded to the physical slot,
If the signal logic of the signal output from the first terminal is different from the signal logic of the signal stored in the storage device, the package loaded in the physical slot is And a means for detecting that the package is not a legitimate package.

According to this configuration, the package does not need a power supply for notifying the identification of the package.

[0030]

Next, an embodiment of the present invention will be described with reference to FIG.

In FIG. 1, reference numeral 1 denotes a physical slot, which is a slot in which a package is loaded.

An erroneous mounting detection circuit 2 detects whether or not the package loaded in the physical slot 1 is a preset package. The erroneous mounting detection circuit 2 includes an erroneous mounting monitoring circuit 21 that monitors a package loaded in the physical slot 1 and an inverting unit (for example, an inverter) 2 that inverts and outputs signal logic of an input signal.
And 2.

Reference numeral 3 denotes a PKG, which includes a first terminal and a PK
This is a package (first package) in which the second terminal to which the G identification signal a is connected is short-circuited.

Reference numeral 4 denotes a PKG, which includes a first terminal and a PK
This is a package (second package) in which the third terminal to which the G identification signal b is connected is short-circuited.

Next, the components of the present invention will be described in detail.

The erroneous mounting monitoring circuit 21 outputs a PKG mounting signal for detecting the identification of the package loaded in the physical slot 1 to the inverting means 22 and to the second terminal of the package via the physical slot. Output means.
For example, the output means outputs a positive logic signal “5V” as a PKG mounting signal.

Inverting means 22 to which the PKG mounting signal has been input
Is for inverting the signal logic of the PKG mounting signal and outputting the inverted signal to the third terminal of the package. For example,
When a positive logic signal “5V” is input as a PKG mounting signal, a negative logic signal “0V” is output to the third terminal of the package via the physical slot 1.

The erroneous mounting monitoring circuit 21 has PKG3,
And PKG4 are the official packages,
There is a storage unit 23 in which information indicating whether the physical slot 1 is loaded is stored. For example, it is stored as signal logic by a dip switch for switching between positive logic and negative logic. Alternatively, information indicating the signal logic is stored in a memory such as a ROM (RAM). Specifically, when PKG3 is set as a legitimate package, the fact that the logic is positive is stored in the storage unit 23. When PKG4 is set as a legitimate package, the fact that the logic is negative is stored in the storage means.

If the signal logic of the signal output from the first terminal of the package via the physical slot 1 is the same as the signal logic of the signal output by the output means, the erroneous mounting monitoring circuit 21 Is identified as PKG3, and if the signal logic of the signal output from the first terminal of the package is the same as the signal logic of the signal output by the inverting means 22, the physical slot 1
Has a means for identifying it as PKG4.

For example, the output means of the erroneous mounting monitoring circuit 21 outputs a positive logic signal "5 V" as a PKG mounting signal. The incorrect mounting monitoring circuit 21 determines that the signal logic of the signal output from the first terminal of the package is a positive logic signal “5”.
In the case of “V”, it is determined that the PKG 3 is loaded in the physical slot 1. Further, the erroneous mounting monitoring circuit 21 determines that the signal logic of the signal output from the first terminal of the package is
If the signal is negative logic “0V”, P
Identify that KG4 is loaded.

The erroneous mounting monitoring circuit 21 stores the signal logic of the signal output from the first terminal of the package in the storage unit 23.
If the signal logic is the same as the signal stored in the physical slot 1, the package loaded in the physical slot 1 is detected as a legitimate package.

Further, when the signal logic of the signal output from the first terminal of the package is different from the signal logic of the signal stored in the storage means 23,
It is detected that the package loaded in the physical slot 1 is not a regular package. That is, it is detected that the package is erroneously mounted.

Next, the operation of the present invention will be described.

First, the package set in advance is PKG
The case of 3 will be described.

Since the package set in advance is PKG3, the erroneous mounting monitoring circuit 21 stores the fact that the logic is positive logic in the storage means 23.

Next, in order to monitor the package loaded in the physical slot 1, the erroneous mounting monitoring circuit 21 directs one of the positive logic signals “5 V” to the second terminal of the package and places the physical slot 1 in the physical slot 1. Output via

The other of the positive logic signal “5V” output from the erroneous mounting monitoring circuit 21 is input to the inversion means 22 in order to monitor the package loaded in the physical slot 1.

The inverting means 22 inverts the input positive logic signal "5V" and outputs the inverted signal "0V" to the third terminal of the package via the physical slot 1.

Here, it is assumed that the PKG 3 is loaded in the physical slot 1.

The mounting monitoring circuit 21 outputs a signal logic (positive logic signal “5 V”) of a signal (erroneous mounting detection signal) output from the first terminal of the PKG 3 via the physical slot 1.
Since the signal logic (positive logic signal “5 V”) stored in the storage unit 23 is the same, it is detected that the PKG 3 (preset package) is loaded in the physical slot 1.

It is also assumed that PKG 4 has been loaded in physical slot 1.

The erroneous mounting monitoring circuit 21 is a signal logic (a negative logic signal “0 V”) of a signal (erroneous mounting detection signal) output from the first terminal of the PKG 4 via the physical slot 1.
Is different from the signal logic (positive logic signal “5 V”) stored in the storage means 23, it is detected that the PKG 3 (a preset package) is not loaded in the physical slot 1. That is, it is detected that the package is incorrectly mounted on the physical slot 1.

Next, the package set in advance is PKG
The case of 4 will be described.

Since the package set in advance is PKG4, the erroneous mounting monitoring circuit 21 stores the fact that the logic is negative logic in the storage means 23.

Next, in order to monitor the package loaded in the physical slot 1, the erroneous mounting monitoring circuit 21 directs one of the positive logic signals "5V" to the second terminal of the package and places the physical slot 1 in the physical slot 1. Output via

The other of the positive logic signal “5V” output from the erroneous mounting monitoring circuit 21 is input to the inverting means 22 in order to monitor the package loaded in the physical slot 1.

The inverting means 22 inverts the input positive logic signal “5V” and outputs the inverted signal “0V” to the third terminal of the package via the physical slot 1.

Here, it is assumed that the PKG 3 is loaded in the physical slot 1.

The mounting monitoring circuit 21 outputs a signal logic (positive logic signal “5 V”) of a signal (erroneous mounting detection signal) output from the first terminal of the PKG 3 via the physical slot 1,
Since the signal logic (negative logic signal “0 V”) stored in the storage means 23 is different, it is detected that the PKG 4 (preset package) is not loaded in the physical slot 1. That is, it is detected that the package is incorrectly mounted on the physical slot 1.

It is also assumed that PKG 4 has been loaded in physical slot 1.

The erroneous mounting monitoring circuit 21 is a signal logic (a negative logic signal “0 V”) of a signal (erroneous mounting detection signal) output from the first terminal of the PKG 4 via the physical slot 1.
And the signal logic (negative logic signal “0V”) stored in the storage means 23 is the same, so that it is detected that the PKG 4 (a preset package) is loaded in the physical slot 1.

[0062]

[Effect] Package mounted on physical slot (PK
The system can be configured at a small scale and at low cost without supplying power to G).

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment according to the present invention.

FIG. 2 is a configuration diagram of a conventional technique.

FIG. 3 is a configuration diagram of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Physical slot 2 Erroneous mounting detection circuit 21 Erroneous mounting monitoring circuit 22 Inverting means 23 Storage means 3, 4 PKG

Claims (6)

[Claims] 1. A system for identifying a package, the system comprising: a first package having a first terminal and a second terminal short-circuited, or a first terminal and a third terminal short-circuited. A physical slot in which the second package is loaded, an inverting means for inverting an input signal, and outputting the inverted signal to the third terminal, the second terminal, and the inverting means. Output means for outputting a predetermined signal toward the means, based on the signal output from the first terminal, which one of the first package or the second package is loaded in the physical slot Means for identifying whether a package is present. 2. The apparatus according to claim 1, wherein said inverting means is means for inverting a signal logic of an input signal and outputting the inverted signal to said third terminal. Package identification system. 3. A system for identifying a package, the system comprising: a first package having a first terminal and a second terminal short-circuited; and a first terminal and a third terminal short-circuited. The second package, the first package, or the physical slot in which the second package is loaded, and the signal logic of the input signal is inverted, and the inverted signal is sent to the third terminal. Inverting means for outputting the signal to the second terminal, and output means for outputting a signal of a predetermined signal logic to the inverting means, and the signal logic of the signal output from the first terminal is If the signal logic of the signal output by the output means is the same,
The package loaded in the physical slot is identified as the first package, and the signal logic of the signal output from the first terminal is the same as the signal logic of the signal output by the inversion means. In some cases, the package loaded in the physical slot has means for identifying the package as the second package. 4. A system for detecting erroneous mounting of a package, the system comprising: a first package in which a first terminal and a second terminal are short-circuited; or a first terminal and a third terminal. A physical slot in which a second package short-circuited is loaded, an inverting means for inverting an input signal, and outputting the inverted signal to the third terminal, the second terminal, And output means for outputting a predetermined signal to the reversing means; and information indicating that a regular package loaded in the physical slot is the first package or the second package. Detecting whether the package loaded in the physical slot is a legitimate package based on a signal output from the first terminal and information stored in the storage unit. hand An erroneous mounting detection system characterized by having a step. 5. The apparatus according to claim 4, wherein said inverting means is means for inverting a signal logic of an input signal and outputting the inverted signal to said third terminal. Incorrect mounting detection system. 6. A system for detecting erroneous mounting of a package, comprising: a first package having a first terminal and a second terminal short-circuited; a first terminal and a third terminal. And a physical slot in which the first package or the second package is loaded, and a signal logic of an input signal is inverted. Inverting means for outputting to the terminal of the second terminal, an output means for outputting a signal of a predetermined signal logic to the second terminal, and the inverting means, and a regular package loaded in the physical slot, A storage unit in which signal logic indicating that the package is the first package or the second package is stored, and a signal logic of a signal output from the first terminal is stored in the storage unit. Signal If the same is true, the package loaded in the physical slot is detected as a legitimate package, and the signal logic of the signal output from the first terminal is stored in the storage unit. Means for detecting that the package loaded in the physical slot is not a legitimate package when the signal logic is different from the signal logic of the signal.