JPH0457116A - Package inserting/drawing-out system - Google Patents

Abstract

PURPOSE:To insert and draw out the package without causing a malfunction by multi-connecting various packages by a bus through a gate circuit, respectively. CONSTITUTION:In the case it is desired to draw out a package 12, a package drawing-out previous notice signal 52 is generated from the package 12. A control package 1 which receives the package drawing-out previous notice signal 52 suspends all the controls related to the package 12. Also, a gate circuit 62 which receives the package drawing-out previous notice signal 52 closes an input/output gate. Even if the package 12 is drawn out, since the gate circuit 62 mounted on a backboard is closed, no influence is exerted on an address bus 2, a data bus 3, and a control line 4. Also, at the time of inserting the package, when the package drawing-out previous notice signal 52 is released by inserting the package 12, the control package 1 detects it and a processing related to the package 12 is started, and also, the gate circuit 62 is opened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a package insertion/extraction method in a control system having a backboard.

[Conventional technology]

FIG. 2 is a block diagram showing an example of a conventional package insertion/extraction method.

As shown in Fig. 2, the conventional control system, various package L'L, 1.2.13, the address bus 2 ゜ data bus on the backboard, focusing on the control package 1.
Each control line 4 is multi-connected.

In this control system, when inserting or removing a certain package, the package is inserted or removed by turning off the transformer power to stop its function, or by inserting or removing the package while the power line is still live.

[Problem to be solved by the invention]

In the conventional control system described above, the method of first turning off the power is not normally carried out because all functions stop. Furthermore, when a certain package is inserted or removed in a live line state, the control system malfunctions due to bus or multi-connection, even though in principle only the liquid package should stop functioning.

[Means to solve the problem]

The package insertion/removal method of the present invention is applied to a control system having a backboard, which includes an address bus, a data bus, a control line, and a control package that are multi-connected to various packages on the pack hold via gate circuits. , while the package is issuing a package removal notice signal, the gate circuit corresponding to this package is closed, and the control package suspends all control regarding the package that has issued the notice signal.

〔Example〕

Next, the present invention will be explained with reference to FIG.

FIG. 1 is a block diagram showing an embodiment of the package insertion/extraction method of the present invention.

In Fig. 1, 1 is a control package, 11°12.1
3 is various packages, 2 is an address bus, 3 is a data bus, 4 is a control line, 51.5253 is a notice signal, 61,
62 and 63 are gate circuits.

In FIG. 1, the same elements as in FIG. 2 are given the same reference numerals.

For example, if you want to remove package]2, package 1
2, a package removal notice signal 52 is generated. The control package 1 that has received the package removal notice signal 52 stops all control regarding the corresponding package 12. Furthermore, the gate circuit 62 that has received the package removal notice signal 52 closes the input/output gate.

As a result, even if the package 12 is removed, the address bus 2. The data bus 3 and control line 4 are not affected in any way.

Further, when inserting the package 12, when the package removal notice signal 52 is canceled by inserting the package 12, the control package 1 detects this and starts processing regarding the package 12, and the gate circuit 62 is opened.

Other packages 11. ．． 1.3, the same operation is performed when inserting and removing them, so the explanation will be omitted.

〔Effect of the invention〕

As explained above, in a control system consisting of a control package and various packages, the present invention has the effect that packages can be inserted and removed without malfunction, since the various packages are connected in multiple ways by buses via respective gate circuits. .

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the package insertion/extraction method of the present invention, and FIG. 2 is a block diagram showing an example of the conventional package insertion/extraction method. ]...Control package, 2...Address bus, 3...
・Data bus, 4... Control line, 1F, 12.13.
...Various packages, 51,52.53...Package removal notice signal, 61,62.63...Gate circuit.

Claims (1)

[Claims] A control system having a backboard, comprising an address bus, a data bus, and control lines multi-connected to various packages on the backboard via respective gate circuits, and a control package, and a package removal notice signal from the package. The package insertion/removal method is characterized in that while the warning signal is being issued, the gate circuit corresponding to this package is closed, and the control package suspends all control regarding the package that has issued the warning signal.