JPH04171514A - Misremoval preventing device - Google Patents

Abstract

PURPOSE:To prevent the misremoval of another normal unit and to evade the total damage of a system by providing a removable lamp which is turned on with a removal enable instruction given from a unit control part, a sensor which detects the cancel of a lock part, and a removal informing alarm means. CONSTITUTION:An electric circuit part 13 includes a lock part 22 which is mechanically canceled when a unit is removed, a removal lamp 23 which is turned on with the removal enable instruction S issued from a unit control part 12, a sensor 31 which detects the cancel of the part 22, and the alarm means 24 and 25 which informs the misremoval of the units. At least one of both parts 22 is canceled when no removal enable instruction is received from the unit control part. Thus both means 24 and 25 are actuated to produce the alarm sounds for information of the misremoval of the units. As a result, normal units are never removed by mistake.

Description

[Detailed Description of the Invention] [Summary] Regarding a device for preventing mistaken removal when replacing one of a plurality of units constituting a 24-hour operating system due to a failure etc. In a computer system in which a CPU having a unit management section and a plurality of units are connected via a system bus, each unit has a lock section that is mechanically released when the unit is removed. , an electric circuit section having a removable lamp that lights up in response to a removable instruction from the unit management section, a sensor for detecting release of the lock section, and an alarm means for notifying erroneous removal; If at least one of the locks is released when there is no instruction to allow removal, the alarm means lights up and sounds to issue a warning that the unit has been removed incorrectly.

[Industrial application field]

The present invention relates to an erroneous removal prevention device that prevents a normal unit from being erroneously removed when any of a plurality of units constituting a 24-hour operating system is replaced due to a failure or the like.

[Conventional technology]

FIG. 4 is a diagram showing the configuration of a typical 24-hour system, in which a plurality of units 1 to 6 are connected under a CPU 1.2 via a system bus SB. Each unit is responsible for one function of the system, for example, unit 1
is an input/output device, unit 2 is a storage device, unit 3 is a line connection device, etc.

Incidentally, in recent years, systems such as those shown in the figure are often systems that operate 24 hours a day. Therefore, in such a 24-hour operating system, in the event of a failure or failure of any unit, it is necessary to accurately and quickly remove/insert the unit during operation without stopping the operation of the entire system.

[Problem to be solved by the invention]

When removing/inserting this faulty unit, if another unit that is operating normally or a unit that is not eligible for upgrade is removed by mistake, it will cause serious damage to the entire system.

SUMMARY OF THE INVENTION An object of the present invention is to provide an erroneous removal prevention device that can prevent erroneous removal of a unit other than the unit to be replaced due to a failure or the like.

[Means to solve the problem]

According to the present invention, the C P having the unit management section 12
U? Units 1 to 6 of Jj number are system bus SB
In a computer system connected via
Each unit includes a lock part 22 that is mechanically released when the unit is removed, a removable lamp 23 that lights up in response to a removable instruction S from the unit management part, and a sensor 3 that detects release of the lock part.
1 and an electric circuit section 13 having alarm means 24 and 25 for notifying erroneous removal, and when at least one of the locks is released when there is no instruction from the unit management section to allow removal, the alarm means lights up and sounds to issue an alarm for incorrect removal of the unit.Specifically, the electric circuit section 13 includes a first AND gate that receives the output of the sensor, and an instruction that indicates that the unit can be removed. a second AND gate that inverts the output of the first AND gate and receives the output of the first AND gate at the other input, and further receives failure address data from the unit management section. ,
A register 32 is provided to output the removable instruction S.

[Effect]

In the present invention, if an attempt is made to replace the unit when there is no removal permission instruction and the removal permission lamp is not lit, the locking mechanism is released prior to removal, so a detection signal that detects the release of the locking mechanism and a removal permission instruction are sent. When the alarm lamp is lit and the buzzer sounds, the alarm lamp is ANDed with the state where no normal unit is removed, thereby preventing a normal unit from being removed by mistake.

[Example] FIG. 1 is a diagram showing the configuration of an apparatus to which the present invention is applied.

As shown, a plurality of units 1 to 6 are loaded so as to be insertable/removable. The unit management section 12 is provided in the CPU, and this unit management section 12 manages the normality/failure of each unit, and when a failure of the unit 3 is detected in the form of an interrupt signal, the failure includes an instruction to allow removal. An instruction is sent to the faulty unit 3 in question.

In the present invention, in order to prevent other operating normal units from being suddenly removed by mistake, the unit management section 12 notifies each unit of an instruction to allow removal, thereby ensuring that only the faulty unit can be removed, as will be described later. be.

Cases in which this removable instruction is generated are: ■ When the unit breaks down; ■ When the unit is to be separated from the software's operation target; ■ When the unit management department operates the target unit according to instructions from the panel to change the function. If you want to terminate and separate it from the operation target, you can consider .

FIG. 2 is an external perspective view of the unit. As shown in the figure, the front of the unit has an operable locking mechanism 22 at the upper and lower ends, an insertion/removal lever 21 at the upper and lower ends, and a removable lamp 23 that displays a removable instruction.
, an alarm lamp 24 and a buzzer 25 are provided. In addition to the conventional function of preventing the unit from loosening, this locking mechanism 22 is designed to work in conjunction with an internal circuit (incorrect removal alarm), so that an internal sensor detects locking/unlocking of the locking mechanism 22. It has become.

Further, the insertion/extraction lever 21 is provided for convenience in insertion/extraction operations.

FIG. 3 is a circuit diagram of an embodiment of the erroneous removal prevention device of the present invention. The electric circuit section 13 includes a sensor 31 that detects locking/unlocking of the lock mechanism 22, a first AND gate that receives a detection signal from the sensor 31, a removable instruction S, and a first AND gate.
It is composed of a second AND gate that receives the inversion of the output of the gate, a removable lamp 23, alarm means 24, 25, and a register 32.

In such a configuration, when the unit management section 12 generates a removable instruction S and a "high level" signal through the register 32, the removable lamp 23 first lights up. At the same time, this removable instruction S is inverted and input to one side of the AND gate 2.

On the other hand, the output of the AND gate 1 is inverted and input to the other input of the AND gate 2. A detection signal from a sensor 31 that detects the operation of the lock mechanism 220 is input to both inputs of the AND gate 1. That is, lock mechanism 2
2 is in the release position, the sensor 31 detects this and outputs a "low level" detection signal, and the AND gate 1
is input.

Therefore, if there is a "low level" detection signal from both sensors 31, AND gate 1 outputs a "low level" coincidence signal, and "high level" is inverted input to AND gate 2, and AND gate 2 outputs a "low level" coincidence signal. The output becomes "low level", the alarm lamp 24 does not light up, and the buzzer 25 does not sound.

Next, when the removable instruction S is not generated, the removable instruction S is at a "low level" and the removable lamp 23 does not light up. Therefore, a "high level" is inverted input to the AND gate 2.

Furthermore, if the lock mechanism 22 is locked in this state, both inputs of the AND gate 1 are "high level J" and its output is also "high level", so the other input of the AND gate 2 is inverted. It becomes "low level". Therefore, the output of the AND gate 2 becomes "low level", and the alarm lamp 24 does not light up and the buzzer 25 does not sound.

Next, a case will be described in which at least one of the locking mechanisms 22 is erroneously released when there is no removal permission instruction S. At this time, since the removable instruction S is at "low level", one input of the AND gate 2 is inverted and becomes "high level". Furthermore, the lock mechanism 22 on the unlocked side is detected and its sensor output becomes "low level". Therefore, since one of the inputs of AND gate 1 is "low level", its output is "low level". Yes, the input of AND gate 2 is inverted and becomes "high level". As a result, the output of the AND gate 2 becomes "high level", so the alarm lamp 24 lights up and the buzzer 25 sounds.

As is clear from the above explanation, if at least one of the lock mechanisms 22 is released by mistake when there is no removal permission instruction S, the alarm lamp 24 lights up and the buzzer sounds, thereby preventing the unit from being removed by mistake. can do.

By the way, as shown in the figure, each unit has conventionally been provided with an error detection section 33, and when an error occurs in the unit, the bus is controlled in the form of an interrupt signal with the highest priority, and the failure is detected by the unit management section. Notify 12. C.P.
When U receives a failure notification, it instructs the unit management section 12,
The unit management section 12 outputs the address and data of the unit (that is, data with the bit set to rl to indicate a failure).

The address and data of this unit are input to the register 32, and the output of this register becomes a removable instruction, which is input to the removable lamp 23.

〔Effect of the invention〕

As explained above, according to the present invention, when any of the plurality of units making up the 24-hour operating system needs to be replaced due to a failure or the like, other normal units may be removed by mistake. Therefore, there is no possibility of causing damage to the entire system.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of a device to which the present invention is applied, Figure 2 is an external view of a unit to which the invention is applied, Figure 3 is a configuration diagram of an embodiment of the present invention, and Figure 4 is a general system configuration diagram. It is. (Explanation of symbols) 1 to 6... Unit, 11... Panel, 12... Unit management section, 13... Electric circuit section, 21... Insertion/extraction lever, 22... Lock mechanism , 23... Removable lamp, 24... Alarm lamp, 25... Buzzer, 31... Sensor, 32... Register, 33... Error detection section, S... Removable instruction. Unit to which the present invention is applied Fig. 1 A unit to which the present invention is applied Fig. 2 External perspective view of the unit Fig. 3 A circuit diagram of an embodiment of the present invention Fig. 3 General system configuration diagram of the unit Fig. 4

Claims (1)

[Claims] 1. A unit management section (12) and a plurality of units (1 to 6)
) are connected to each other, each unit has a lock part (22) that mechanically releases when the unit is removed.
), an electric circuit section (24, 25) having a sensor (31) for detecting release of the lock section in response to a removal permission instruction (S) from the unit management section and alarm means (24, 25) for notifying erroneous removal.
13), and when the lock section is released when there is no instruction from the unit management section to allow removal, the alarm means lights up or sounds to issue a warning of incorrect removal of the unit. Features a device to prevent accidental removal. 2. The prevention of erroneous removal according to claim 1, wherein the electric circuit section (13) further comprises a register (32) that receives failure address data from the unit management section and outputs the removal permission instruction (S). Device.