JPS5945745A - System switching device - Google Patents

Abstract

PURPOSE:To simplify the system switching control, by suplying a power supply driving a switching circuit of a system switching device from a controller of common use system. CONSTITUTION:A communication controller 6 is a controller of the common use system and incorporates a system controller 9. A relay 8 driving a contact (a) of the switching circuit of the system switching device 9 obtains a current from a power supply E of the communication controller 6. If the power supply E is failed, when a data terminal device 1 is connected to a line connecting section 10 of the communication controller 6, the relay 8 is restored and the contact (a) is reversed as shown by a solid line. The data terminal is connected to a line connecting section 11 of a communication controller 7. This operation does not require the control of the monitor 5. Then, the system switching control is simplified.

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to system switching for switching between the active and standby systems of a processing system and connecting peripheral devices to either the active system or the standby system. The present invention relates to an apparatus, and in particular to a control system and configuration for system switching loading.

(b) Prior Art and Problems In general, in order to improve the reliability of information processing systems, devices where a failure would affect the entire system or the entire device are prepared for the occurrence of a failure by having a redundant configuration of active and standby systems.

In addition, as a form of continuous use for 2M, a duplex configuration (one side is a regular system and the other is a standby system) is generally used because it is easy to implement. In the system operation of this duplex configuration, when the system is switched due to the occurrence of a failure, the operation is allowed to be interrupted, but this interruption time should be shortened as much as possible, Increasing the reliability of the installation ml is the 4th cost of molding.

FIG. 1 is a block diagram illustrating a conventional system switching device ut. This example shows a case where it is installed between a communication control device and a data terminal device. The data terminal device 1 is connected to the system switching device 2, and the actual Q
In the direction shown by the dotted line, it is connected to the communication control device 3, and in the direction shown by the dotted line, it is connected to the communication control device ftM-4. The contacts of the switch are usually relays and are driven by the power supply. The monitoring device 5 monitors both the active and standby systems of the information processing system, including the communication control devices 3 and 4, and controls the control section C of the system switching device '2 in the event of a fault 7, and switches the switch contact a to the solid line. or dotted line. In this case ■ System switching system (About failure of the power supply at Hama 2) ○ If the relay is driven by the power supply and, for example, contact a is on the dotted line side, when the power is cut off, the relay is restored and contact a returns to the solid line side. Execute system switching in the first place.

■Also regarding the interface with the monitoring device 5.

Since the monitoring device 5 receives a system switching signal as a control signal, it is necessary to send out a system display signal and a power status signal for status reporting, which requires extra cables and mechanisms.

■ Regarding the line connection cable.

A connection cable for data transmission between the data terminal device 1 and the communication control devices 3 and 4 is required, which is not economical.

There are drawbacks as explained in (1), (2), and (3) above.

(c) Object of the invention In order to eliminate the above-mentioned drawbacks, the object of the present invention is to supply power for driving the switching circuit of the system switching device from the control device of the current system.
Another object of the present invention is to provide a system switching device having a structure in which the system switching device is built into a control device.

(d) Configuration of the Invention The configuration of the present invention is connected to a current and backup control device that controls peripheral devices connected to an information processing system that forms a current and backup duplex configuration, and which switches between the peripheral devices. In a system switching device connected to either the active or standby control device, the power to drive the switching circuit is supplied from the active system control device, and if there is a failure in the power supply and/or the current system control device, , the peripheral device is automatically switched from the active system control device to the standby system control device d, and can be built into the active system control device.

(e) Embodiment of the Invention FIG. 2 is a block diagram of a circuit showing an embodiment of the invention. System switching system with 6 communication control devices currently in use
Built-in f<9. The relay 8 that drives the contact a of the switching circuit of the system switching device 9 receives the power EJ, ηi, and current of the communication control device 6. This Kt power supply is
The power supplies 1- and -C shared with the power supply of 6 may also be provided for J'/. When the relay 8 is driven by the power storage E and the data terminal device 1 is connected to the line connection section 10 of the communication control device 6 and the data terminal device 2 is connected to the line connection section 10 of the communication control device 6 as shown by the dotted line, each contact a is connected to the power supply E. If there is, the relay 8 cores, 1, KM old, the contact a is reversed as shown by the solid line, and the data is sent to the line connection part 11 of the U control device fFj 7. In other words, system switching is carried out.Also, due to a problem other than the power supply of the communication 1:1 system 16, a disconnection order is received from the medium heat processing system of the 1j renal υ processing system 7'? : At k"4, contact d is opened, so system switching is possible in the same way as above.

In order to operate as described above, the system switching is performed from the monitoring device 5.
There is no need to receive the til Ill signal, and there is no need to send the power status display signal to the system switching device 9F, i: Do not have an electric mixer (i'75, only the signal is sent to the system display) That's fine.

Since the system switching device 9 is installed inside the communication control device 6, it is only necessary to have a connection cable between the standby communication control device 7 and the data terminal device 1, and there is no internal connection with the active communication control device 6. It is possible and economical to reduce the number of connection cables.

(f> As described in detail of the invention, the present invention simplifies system switching control, prevents erroneous system switching that would lead to power interruption of the system switching device, reduces the number of connection cables, and improves monitoring equipment. fU
Since it is possible to reduce the number of signals exchanged with the system, it is possible to provide an economical system switching device, which has great effects.

[Brief explanation of the drawing]

FIG. 1 is a block diagram explaining a conventional system switching device, and FIG. 2 is a block diagram of a circuit showing an eleventh example of the present invention. 1 is a data terminal device, 2 and 9 are system switching devices, 3.4,
6. 7 is a communication control device, 5 is a monitoring device, 10° 11 is a part of the circuit.

Claims (1)

[Scope of Claims] 1) 7L connected directly to the current and backup control device 61-4 for controlling peripheral devices connected to the information processing system forming the current and backup duplex configuration; 7. : + System switching device that switches the transmission device and connects it to either the current or preliminary A; If the peripheral device is supplied from the current system control device 11 due to a failure of the electric whistle control device and/or the current system control device (liii system control device 6
．． System switching device M characterized by automatically switching to
. 2) A system switching device characterized in that the system switching device is configured such that it can be built into an active system control device.