JPH04291791A - Connecting package - Google Patents

Abstract

PURPOSE:To eliminate malfunction even is a package is pulled out in a live state. CONSTITUTION:Gate circuits 51-53 are provided on the back board of a control system, packages 11-13 are connected to a address bus line 2, a data bus line 3, and a control line 4 via the gate circuit. When the control package 1 detects, for example, the defect of the package 12, it instructs the gate circuit 52 to close a gate so as to disconnect the package 12 and address bus line 2, the data bus line 3, as well as the control line 4. Thus, even if the package 1 is pulled out in this state, other packages are not affected, without producing malfunction. When the package 12 is mounted on the system again, the package 12 feeds a gate release signal to a signal line 62. When the gate circuit 52 receives it, it opens the gate to connect the package 12 to the bus.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a plurality of packages to a backboard of an apparatus through connectors.

0002

2. Description of the Related Art For example, in the case of a certain type of control system composed of a plurality of packages, as shown in FIG. Address bus lines 2, data bus lines 3, and control lines 4 are multi-connected to each package.

[0003] In such a control system, when a package is to be removed from the main body of the device, it is necessary to either turn off the power to the system and stop all operations before removing the package, or to remove the package while the power is still live. One of the following methods has been adopted. However, since the former method stops all functions of the system, the latter method is usually adopted.

0004

[Problem to be Solved by the Invention] By the way, when a package is removed while the line is live, since multiple buses are connected, not only the functions related to the removed package are stopped, but other packages are also affected. This often resulted in malfunctions. A similar problem also occurred when inserting a removed package.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a package connection method that solves these problems and prevents malfunctions even when a package is inserted or removed while the line is live.

[0006]

SUMMARY OF THE INVENTION The present invention provides a backboard, a control package and a plurality of other packages attached to the backboard through connectors, address bus lines multi-connected to the packages on the backboard, and In a package connection method for a device having a data bus line and a control line, each of the plurality of other packages is arranged on the backboard and corresponds to the address bus line, the data bus line, and the control line. The control package is connected to or disconnected from the other package, and a gate circuit is provided which is controlled by the control package and the corresponding other package.

[0007]

[Example] Next, an example of the present invention will be described. Figure 1
An example of a control system configured based on the package connection method according to the present invention is shown in FIG. 1 is a control package, 1
1 to 13 are other packages, 2 is address bus line,
3 is a data bus line, 4 is a control line, 51 to 53 are gate circuits, and 61 to 63 are gate release signal lines. In the figure, Figure 2
Components that are the same as those in the control system are given the same reference numerals.

The gate circuits 51 to 53 are connected to each package 11.
~13 are provided on the backboard, and the terminals on the package side are connected to the corresponding packages, respectively.
On the other hand, the control package 1, address bus line 2, data bus line 3, and control line 4 are multi-connected to the terminal on the backboard side. Each gate circuit 51 is controlled by the control package 1 through the control line 4, and is controlled by each of the other packages 11-13 through signal lines 61-63 connecting each package 11-13 and each gate circuit 51-53. Ru.

Next, the operation will be explained. When the control package 1 detects a failure of the package 12, for example, the control package 1 discontinues all control regarding the package 12;
It also instructs the gate circuit 52 to close the gate, and connects the package 12, address bus line 2, data bus line 3,
and the control line 4 is disconnected. The control package 1 displays on its front surface a display indicating that the gate circuit 52 is closed. Note that once each gate circuit 51 to 53 closes its gate under the control of the control package 1,
Thereafter, the gate will not open under the control of the control package 1. However, control package 1 is
Status information indicating whether the gate is closed or open can be received from each gate circuit 51-53.

[0010] Here, the operator confirms that the gate circuit 52 is closed by looking at the above display on the control package 1, and then pulls out the package 12. In this state, address bus line 2, data bus line 3, and control line 4 are all separated from package 12 by gate circuit 52, so even if package 12 is removed, other packages will not be affected at all. Does not occur.

When the removed package 12 is reinserted, the package 12 first sends a gate release signal to the gate circuit 52 through the signal line 62, whereby the gate circuit 52 opens the gate and disconnects the package 12 and the gate circuit 52. Connect to bus. Thereafter, the control package 1 confirms that the gate is open based on the status information from the gate circuit 52, and resumes processing for the package 12.

0012

[Effects of the Invention] As explained above, according to the package connection method of the present invention, each package and the bus are connected through the gate circuit, so when necessary, the gate can be closed to separate the package and the bus. be able to. Therefore,
If a problem occurs with a package and it becomes necessary to insert or remove it, by closing the gate, you can prevent other packages from being affected at all even if the package is inserted or removed while the wires are live. Malfunctions can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a control system that employs the package connection method of the present invention.

FIG. 2 is a block diagram showing an example of a control system that employs a conventional package connection method.

[Explanation of symbols]

1 Control package 2 Address bus line 3 Data bus line 4 Control line 11-13 Other packages 51-53 Gate circuit 61-63 Gate release signal line

Claims (1)

[Claims] 1. A backboard, a control package and a plurality of other packages attached to the backboard through connectors, and address bus lines, data bus lines, and control lines that are multi-connected to the packages on the backboard. In the package connection method of equipment equipped with
arranged on the backboard for each of the plurality of other packages, the address bus line, the data bus line,
and a package connection method, characterized in that the control line and the corresponding other package are connected or disconnected, and a gate circuit is provided that is controlled by the control package and the corresponding other package.