JPS598005A - Multiplexing device - Google Patents

Abstract

PURPOSE:To attain high reliability with a low cost for a multiplexing device, by providing an automatic switching function to a primary function device, dividing the secondary function devices for each function to distribute dispersedly in terms of space and performing a manual switching between a using device and a space device. CONSTITUTION:A primary function device 2 which receives data from a host computer 1 performs the control of communication with the computer 1, error check for the received data, confirmation of propriety and formation of data based on the function sorting and then delivers the data to the secondary function devices 5-9 for each function sorting. An automatic switch circuit 3 monitors the states of both systems to perform automatic switch control and carries out the double switching by means of a switch 4. Then controllers 5-9 needed for controllers 7-10 to be controlled take charge of exclusive functions individually. Each secondary function device contains an alarm device, and switches 6-8 are operated manually when the alarm device works to switch the devices 5-9 to spare devices respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multiplexing device that multiplexes device configurations and each device is provided with an appropriate switching function.

In order to realize a complete system with high reliability, a method is generally adopted in which the devices constituting the system (for example, a display device at a racetrack controlled by a computer) are configured in a multi-system configuration. When using a multi-system configuration, a function to switch multiple systems is required, but in a device that is composed of a group of devices, it is necessary to perform the switching function for each device or centrally perform the switching function for all device groups at once. A switching function is required. If each device is equipped with a switching function, especially in the case of automatic switching, even if the switching function of a famous device is relatively small, it will be a certain size when viewed from the whole device, so it will be expensive. There is also a risk that reliability may decrease due to the switching function group.

On the other hand, when a centralized switching function is provided, the switching circuit is complicated and the reliability is lowered because the switching function is functionally built-up from the previous small-scale switching function. In the event of a malfunction, the operation of the entire device may be affected.

An object of the present invention is to provide a multiplexing device that is inexpensive and highly reliable.

The configuration of the present invention is a device including a main functional device and a sub-functional device connected to the main functional device, each of which has a multiplex configuration, in which the main functional device has an automatic switching function, The sub-function equipment is divided according to function, and each of these divided equipment is spatially distributed, and switching from the active equipment to the standby equipment in the divided equipment is performed manually. do.

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. The main function device 2 and the sub function P& 2 main functional devices that receive data from the host computer 1 Controls communication with the host computer 1, checks errors in received data, confirms validity 9 Performs data construction processing based on functional classification, and distributes data for each functional classification. Sub-functional equipment 5,
Send to 9. The automatic switching circuit 3 monitors the condition of both threads,
Switching control is automatically performed and switch 4 executes duplex switching. The sub-functional devices 5 and 9 each share dedicated functions for the necessary control functions for each controlled device 7.10.

In addition, each of the sub-functional devices 5 and 9 is equipped with an alarm device, and when the IV alarm system is activated, the switch 6 is manually operated.
or 8, and switch the sub-functional device 5 or 9 to the standby side. This switching is performed independently of the switching of the main functional device 2.

In the present invention, as explained above, the device is divided into a main functional device that performs a central function and a sub-functional device that assists this function. This main functional device has a dedicated automatic switching function and is capable of high-speed switching, and is highly reliable because it is dedicated and has a simple configuration. On the other hand, sub-functional devices are distributed according to their functions, so that even if a failure occurs in one distributed device, it will not affect other devices and reduce the risk, and the distributed devices can be manually switched. Each device has its own function, so that even if a failure occurs in each distributed device, normal operation can be easily resumed. Therefore, the present invention has the effect of realizing a multiplexing device that is inexpensive and highly reliable.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1...Host computer, 2...Main function equipment, 3...Automatic switching circuit, 4...
・Main function equipment duplication selector switch, 5, 9...
Sub-functional equipment, 6, 8...Sub-functional equipment duplication selector switch, 7, 10...Controlled equipment.

Claims (1)

[Claims] In a device that includes a main functional device and a sub-device connected to the main functional device, each of which has a multiplex configuration, the main functional device has an automatic switching function, and the sub-functional device has an automatic switching function. 1. A multiplexing device characterized in that the multiplexing device is divided into two devices, each of the divided devices is spatially distributed, and the switching from the active device to the standby device in these divided devices is performed manually.