JPH06327055A - Control system - Google Patents

Abstract

PURPOSE:To specify abnormality, and to resume separation and a normal operation by turning the buffer of a distributing part to a non-connecting state for all the packages to be controlled when the abnormality of a control signal is detected by a control part. CONSTITUTION:When the abnormality of the control signal is detected by a control part 2, the control part 2 turns the buffer of a distributing part 5 to a non-connecting state for all packages 6 to be controlled by a buffer control signal (b) through an opening and closure control part 3. Then, after the buffer of the distributing part 5 is turned to the non-connecting state, the normality of a control bus (a) is checked by using a self monitoring part 4 possessing in a control package 1. At that time, when the abnormality is detected, the fault of the control package 1 can be specified. Next, when the abnormality is not detected, the control part 2 successively turns the buffer of the distributing part 5 to a connecting state through the opening and closure control part 3, and performs a test control to the packages 6 to be controlled. Then, when all the tests are ended, the normal operation is restored by using the packages 6 to be controlled which are remained in the connecting state as objects.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package control system using a control bus, and more particularly, a logic package is used as a circuit configuration to control a control bus from a control package having one control unit to a plurality of controlled packages. The present invention relates to a control method for performing control by using the control method.

[0002]

2. Description of the Related Art Conventionally, in a control system using a control bus, the control bus is, for example, an address signal, a data signal,
The control bus is connected to the controlled package in a bus shape due to the problem of the number of terminals and the like. Then, the control unit can individually control the controlled package using the address signal, the control signal, and the like.

Here, for example, when the control bus is in an abnormal state constantly on the control bus or due to the controlled package, the bus is in an unusable state, and the control unit controls the controlled package on the bus. Cannot be controlled. Furthermore, it is difficult to identify whether the cause of the abnormality is in the control unit itself, on the bus, or in the controlled package, and to separate it, so that the control unit avoids the failure point and It also becomes difficult to continue control.

Therefore, conventionally, for example, the control units 12 and 14 and the control buses c and d are duplicated by a configuration as shown in FIG. 5, which is a block diagram showing an example of a conventional control system. In FIG. 5, 11 is a control package,
Reference numeral 13 is a controlled package, and 15 is a control package (spare).

In this way, the control units 12 and 14 and the control buses c and d are duplicated, and the control unit 12 (14) detects a bus abnormality such as being out of control when controlling the controlled unit. If so, both the control unit 12 (14) and the control bus c (d) input / output from the control unit 12 (14) are regarded as abnormal, and the control unit 12 (14) and the control bus c (d) are switched to a new one. The control of the controlled package 13 was continued by using the control unit and the new control bus.

[0006]

In this conventional control method, it is necessary to duplicate the control section and the control bus, the circuit scale is large, a large number of terminals are required on the controlled side, and the abnormal point is specified. There was a problem that it was also difficult. The present invention has been made in order to solve such a problem, and an object thereof is to obtain a control method capable of specifying and disconnecting an abnormal portion and resuming normal operation when an abnormality occurs in a control bus.

[0007]

The control method of the present invention is as follows.
In a method of controlling from a control package having one control unit to a plurality of controlled packages using a control bus, a distribution unit that distributes the same control bus input / output from the control unit to a plurality of input / output buffers. An opening / closing control unit that independently opens and closes the buffer of the distribution unit according to an instruction from the control unit; and a self-monitoring unit that can confirm the normality of the control bus in the control package according to an instruction from the control unit. And a plurality of controlled packages are connected to each of the control buses.

[0008]

According to the present invention, when an abnormality in the control signal is detected by the control unit, the control unit disconnects the buffer of the distribution unit from all the controlled packages by the buffer control signal via the opening / closing control unit, If no abnormality is detected, the control unit sequentially connects the buffers of the distribution unit via the opening / closing control unit to perform the test control on the controlled package.

[0009]

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a control system according to the present invention. In FIG. 1, 1 is one control unit 2
And a plurality of controlled packages 6, which are configured to control the controlled package 1 from the control package 1 using the control bus a. A distribution unit 5 distributes the same control bus input / output from the control unit 2 to a plurality of input / output buffers, and 3 a distribution unit 5
The opening / closing control unit 4 which independently opens and closes the buffers in accordance with the instruction of the control unit 2 is a self-monitoring unit which can confirm the normality of the control bus a in the control package 1 according to the instruction of the control unit 2. b indicates a buffer control signal.

The control bus a from the control unit 2 in the control package 1 is connected to the distribution unit 5 and the self-monitoring unit 4, and the control information input / output from the distribution unit 5 to the outside of the control package 1 is controlled by each target. It is connected to the control package 6 and is configured to be able to send / stop the control signal to each controlled package 6 by the buffer control signal b from the control unit 2 to the distribution unit 5 via the opening / closing control unit 3.

Next, the operation of the embodiment shown in FIG. 1 will be described with reference to FIG.
It will be described with reference to FIGS. 2 and 3 and 4
2 is a block diagram for explaining the operation of FIG. 1, FIG. 2 shows an operation at the time of self-monitoring, FIG. 3 shows an operation of identifying an abnormal bus, and FIG. 4 shows an operation of disconnecting the abnormal bus. First, in normal times, as shown in FIG. 1, the distributor 5 connects the control signal from the controller 2 to all the controlled packages 6 via the opening / closing controller 3.

Next, when an abnormality in the control signal is detected by the control unit 2, the control unit 2 causes the open / close control unit 3 to operate as shown in FIG.
A buffer control signal b is used to disconnect the buffer of the distribution unit 5 from all the controlled packages 6. Then, after disconnection, the normality of the control bus a is checked using the self-monitoring unit 4 in the control package 1.
Here, if an abnormality is detected at this point, it can be identified as a failure of the control package 1. Next, when no abnormality is detected, the control unit 2 sequentially connects the buffers of the distribution unit 5 via the opening / closing control unit 3 as shown in FIG. Test control.

Here, if an error occurs when a certain buffer is connected and test control is performed on the controlled package, it can be specified that the buffer under the buffer is abnormal. Furthermore, the buffer is brought into a non-connection state, and the controlled package connected to the buffer is separated. After that, connection control and test control of all buffers are performed, and the buffer in which an abnormality is detected is set to the non-connection state. And at the end of all tests,
As shown in FIG. 4, the normal operation is resumed for the controlled package left in the connected state.

[0014]

As described above, according to the present invention, a logic element is used as a circuit configuration, and when an abnormality of the control signal is detected by the control unit, the control unit controls the distribution unit by the buffer control signal via the opening / closing control unit. The buffer is not connected to all the controlled packages, and if no abnormality is detected, the control unit sequentially connects the buffers of the distributor through the switching control unit to the controlled packages. Since test control is performed, the number of terminals on the controlled side is smaller than in the past, and with a smaller circuit configuration, when an abnormality occurs in the control bus, it is possible to identify and disconnect the abnormality and restart normal operation. It has the effect of being able to.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a control system according to the present invention.

FIG. 2 is a block diagram for explaining the operation of FIG.

FIG. 3 is a block diagram for explaining the operation of FIG.

FIG. 4 is a block diagram for explaining the operation of FIG. 1.

FIG. 5 is a block diagram showing an example of a conventional control method.

[Explanation of symbols]

 1 Control Package 2 Control Section 3 Open / Close Control Section 4 Self-Monitoring Section 5 Distribution Section 6 Controlled Package

[Procedure amendment]

[Submission date] April 8, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

The control method of the present invention is as follows.
In a method of controlling from a control package having one control unit to a plurality of controlled packages using a control bus, a distribution unit that distributes the same control bus input / output from the control unit to a plurality of input / output buffers. An opening / closing control unit that independently opens and closes the buffer of the distribution unit according to an instruction from the control unit; and a self-monitoring unit that can confirm the normality of the control bus in the control package according to an instruction from the control unit. And a plurality of controlled packages are connected to each of the control buses. Well
In addition, when the control unit detects an abnormality in the control bus, it opens and closes.
All I / O buffers of the distribution unit
Connection to the package, and the self-monitoring unit controls
As a result of checking the normality of the
If it is determined that there is no, the input / output buffer of the distributor is
Set the next connection state and test control the controlled package.
If an error is detected at this time, the I / O buffer
It is to disconnect the FA again.

Claims (1)

[Claims] 1. In a system in which a control package having one control unit controls a plurality of controlled packages using a control bus, a plurality of input / output of the same control bus input / output from the control unit is performed. A distribution unit for distributing to the buffer, an opening / closing control unit for independently opening and closing the buffer of the distribution unit according to an instruction from the control unit, and confirming the normality of the control bus in the control package according to the instruction from the control unit. And a plurality of controlled packages are connected to each of the control buses.