JPH0259934A - Inter-device connection switching control system for duplicated device - Google Patents

Abstract

PURPOSE:To allow the states of connection switches in both systems to coincide with each other by simultaneously outputting command information from a two-system switching control part controlled from both the system to the connection switches in both the systems in each system. CONSTITUTION:A central processing part 1 in the system A and a central processing part 2 in the system B output respective switch control signals a0, b0 to the switch control part 3. The switch control part 3 outputs command information c0 to the connection switches 5, 6 in accordance with a command outputted from the central processing part 1 or 2 in the system A or B and the switches 5, 6 switch the connection of interface signals (d), (e) respective systems in accordance with the command information c0. When the control of the switch control part 3 from the central processing parts 1, 2 is impossible, switch control signals a1, b1 are respectively outputted to the switch control part 4 and the switch control part 4 outputs command information c1 to the switches 5, 6. Consequently, the operation of the connection switches in both the systems can be allowed to coincide with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a duplex device, and particularly to a control method for connecting one system to another device.

[Conventional technology] As a conventional technology, there is a switching control section that controls a connection switch for switching connections with other devices in both systems of a duplexing device, and each switching control section independently switches connections for each prefecture. There is a method to control the device.

[Problems to be Solved by the Invention] In the conventional connection switching control method described above, each prefecture's switching control unit independently operates its own connection switch, so the central processing unit and switching control unit of each prefecture If contradictory operations occur, the operation of the connection switch for both systems will be different, and other devices will be connected to each system separately.

[Means for Solving the Problems] In the duplex device of the present invention, the connection switching control method between other devices in the duplexing device is such that the central processing unit of the first system and the central processing unit of the second system each switch the connection of the first system. In a duplexing device in which the connection is switched to another device by a connection switch between the device and the second system, and one of the central processing units of the first and second systems is always connected to the other device. , the first and second signals from the central processing units of the first and second systems.
receiving the control information, determines the connection between one of the central processing units of the first and second systems and the other device, and based on the determination result, transmits the first command information to the A first switching control unit that outputs to the connection switch of the first and second systems, and receiving third and fourth control information from the central processing units of the first and second systems, The connection between one of the central processing units of the first and second systems and the other device is determined, and the second command information is transmitted to the first and second systems based on the determination result. and a second switching control unit that outputs output to the switching device, and the connection switching device of each prefecture receives the first and second command information and controls the connection between the central processing unit of its own system and the other device. It is characterized by switching.

[Embodiment] FIG. 1 is a block diagram showing the configuration of a duplexing device to which a connection switching control method according to an embodiment of the present invention is applied.

One system of the duplexing device is called A system, and the other system is called B system. When the A-system central processing unit 1 and the B-system central processing unit 1 perform switching control on the connection switches 5 and 6, they each send a switching control signal a to the switching control unit 3. Outputs +bO. The switching control unit 3 outputs command information Co to the connection switch 5.6 in accordance with instructions from the A-system or B-system central processing unit.

Connection switchers 5 and 6 receive external interface signal d.

The connection between e and each prefecture is switched according to command information C8.

If control from the central processing unit 1.2 of each prefecture to the switching control unit 3 is impossible, each switching control signal al+ is sent to the switching control unit 4.
b+, the switching control unit 4 outputs the command information c1 to the connection switch 5.6, and outputs the external interface signal d,
Switch the connection between e and each prefecture.

[Effects of the Invention] As explained above, the present invention has two switching control sections that are controlled from both systems, and the switching control sections of the two systems control the connection switching devices of both systems for each system. By outputting command information at the same time, there is an effect that the states of the connection switching devices of both systems can always match.

1.2... Central processing unit, 3, 4... Switching control unit, 5
゜6...Connection switch, aO+ l + b O+
b l...Switching control signal, c(,,c,...Command information, d, e...External interface signal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a duplexing device to which a connection switching system according to an embodiment of the present invention is applied.

Claims (1)

[Claims] 1. The central processing unit of the first system and the central processing unit of the second system connect to other devices by the connection switch of the first system and the connection switch of the second system, respectively. The connection is switched and the first and second
In a duplexing device in which one of the central processing units of the system is always connected to the other device, the first and second central processing units from the central processing units of the first and second systems are
receiving the control information, determines the connection between one of the central processing units of the first and second systems and the other device, and based on the determination result, transmits the first command information. a first switching control unit outputting to the connection switch of the first and second systems; and third and fourth switching control units outputting from the central processing unit of the first and second systems.
receiving the control information, determines the connection between one of the central processing units of the first and second systems and the other device, and based on the determination result, transmits the second command information to the and a second switching control unit that outputs to the connection switch of the first and second systems, and the connection switch of each system receives the first and second command information and outputs the output to the connection switch of the own system. 1. A method for controlling connection switching between other devices in a duplex device, characterized in that the connection between the unit and the other device is switched.