JPH0373621A - Line switching control system - Google Patents

Abstract

PURPOSE:To validate the control of a line switching section of a new active system when an active system keeps the active operation regardless of fault occurrence and other system becomes the active system by allowing the active system to select line switching control with priority for last active system. CONSTITUTION:A selection section 5 for placing priority on last active system is a means validating the control of an equipment being later active to a line switch when one equipment is active and then other equipment becomes active. A line switching section 6 is a line switching section receiving a line switching control signal (c) from the above selection section 5. An A system line switching control signal (a-2) from an equipment 1 of a system A is invalidated by a B system active mode output signal (b-1) from an equipment 2 of a system B when the equipment 1 of the system A is not active. When the equipment 1 of the system A is active; the line switching control of the system A is validated. when both the equipment 1 of the system A and the equipment 2 of the system B are active, the selection section 5 selects the line switching control signal of the system being active later to control the line switching section 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a line switching control method in a line switching device that switches the connection between the line input/output units of two devices and an external line.

[Conventional technology]

Conventionally, the current system of line switching control has been effective as a control method for the line switching devices of two devices.

In this case, there is a method of disabling control of the line switching unit from other systems.

[Problem to be solved by the invention]

In the conventional line switching device control method described above, even if the active system has failed, the current system is maintained and no longer available.
There were 11 problems in which when the power system transitioned to the active system, control to the line switch of the new active system became invalid.

[Means for solving problems.]

The line switching control method of the present invention is a line switching device that switches the connection between the line input/output section of two devices and an external line, and when one device is an online system, the line switching control method of the other device is controlled. and a means for enabling control of the line switching device of the device that later becomes online when one device is online and the other device becomes online. It is something.

[Effect]

According to the present invention, line switching control is selected from the current system with priority given to the later generation.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

The figure is a block diagram showing one embodiment of the present invention.

In the figure, 1 indicates an A-system device, and 2 indicates a B-system device.

3-1 is the A thread mass mode output signal a from the A system device 1.
3-2
inputs the output of this AND gate 3-1 to the inverting terminal and A
The AND gate receives the A system line switching control signal &-2 from the system device 1, and 4-1 inputs the B system active mode output signal b-1t- from the B system device 2 to the inverting terminal. 4-2 inputs the output of this AND gate 4-1 to the inverting terminal, and switches the B system line from the B system device 2. The AND gate receives the control signal b-2 as an input, and when one of the devices is on-line, constitutes a means for disabling the control of the line switching device of the other device.

5B A-system active mode output signal turtle-1 from A-system device 1
and the B-system active mode output signal b-1 from the B-system device 2, the output of the AND gate 3-2, and the AND gate 4.
This is a later priority selection unit which receives the output of -2 as an input, and this later priority selection unit 5 selects a device that later becomes online when one device is online and the other device becomes online. This constitutes a means by which control over the line switching device is effective. Reference numeral 6 denotes a line switching unit which receives the line switching control signal ef from the later priority selection unit 5.

Next, the operation of the embodiment shown in this figure will be explained.

First, the A-system line switching control signal a-2 from the A-system device 1
If the A-system device R1 is not in active use, the B-system active mode output signal b-i from the B-system device 2 becomes invalid. Then, when the A-system device 1 is currently in use, the A-system line switching control becomes effective.

Next, when both the A system device 1 and the B system device 20 are currently in use, the line switching control signal of the system that became active later is selected by the later priority selection unit 5, and the line switching unit Control 6.

〔Effect of the invention〕

As explained above, the present invention selects the later line switching control from the active system, so that even if the active system maintains the current operation even if a failure occurs, the other system becomes the active system. This has the effect of making the control of the new active line switching unit effective.

[Brief explanation of drawings]

The figure is a block diagram showing one embodiment of the present invention. 1...A system device, 2...B system device, 3-1
．． 3-2.4-1, 4-2...and gate, 5.
. . . Late priority selection section, 6. . . Line switching section.

Claims (1)

[Claims] In a line switch that switches the connection between the line input/output section of two devices and an external line, if one device is an online system, a means for disabling the control of the line switch of the other device, and a means for disabling the control of the line switch of the other device, and one device line switching control, characterized in that the line switching control comprises means for enabling control of the line switching device of the device that later becomes online system when the other device becomes online system when the other device becomes online system. method.