JPH012112A - No-down processing method in central control equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Table of contents] Overview Industrial field of application Prior art (Figure 3) Problems to be solved by the invention Means for solving the problems (Figure 1) Working examples (Figure 1) Figure 2) Effects of the invention [Summary] In a control device in which a plurality of controllers having the same function are concentrated in one housing and a power supply unit is shared, the power supply to each controller can be turned on and off, and the power supply to each controller can be turned on and off. It is possible to individually control the application of reset signals to each controller, and even if one controller breaks down, the power supply can be cut off and repaired individually without stopping the operation of other controllers. To enable later reset.

[Industrial application field]

The present invention relates to a control device in which a plurality of controllers having the same function are concentrated in one housing by sharing a power supply section.

When displaying a large amount of data using a large number of display devices such as CRTs, it is necessary to provide controllers having the same number of functions as the number of display devices, and to control and drive the display devices such as CRTs with each controller.

In this case, a single display device may be constructed by preparing a plurality of independent display devices, but this increases the size and cost of the entire device.

Therefore, there is a need for a compact control device such as a display device that controls a plurality of display devices.

[Conventional technology]

FIG. 3 shows a conventional example of a display device having a compact control device having a plurality of display devices.

In FIG. 3, the plurality of displays DISO to DISn are
Each control unit (controller) CNT. ~CNTn, but each controller CNTO~C
The power supply unit 1 for the NTn is common and housed in one housing 10.

Since there is no need to provide a separate power supply for each controller and display, the overall size can be made compact and costs can be reduced.

[Problem that the invention seeks to solve]

However, in the conventional example shown in Fig. 3, when one of the controllers breaks down, it is necessary to turn on the power supply
Therefore, there is a problem in that the operation of controllers other than the failed controller must also be stopped.

The present invention has been made in view of the above points, and it is an object of the present invention to independently turn on/off the power supply to each controller and apply a reset signal to a plurality of controllers that share a power source. It is an object of the present invention to provide a no-down processing method in a centralized control device that does not affect the operation of other normal controller parts when repairing a controller when it breaks down.

[Means for solving problems]

FIG. 1 is a block diagram of the principle of this invention.

In the figure, D I S o to D I S n are display devices made of, for example, a CRT, and are controlled by controllers CNT and CNTn, respectively.

Each controller CNTO to CNTn is connected to a common power source 1 via contacts of relays RL and ~RLn,
Each relay RL, ~RLn is selectively driven by a relay driver (not shown) provided in the sub-panel 2. A reset driver (not shown) for resetting each controller is further provided in the sub-panel, so that each controller can be reset individually.

-76・ The controllers CNT, ~CNTn, etc. are housed together with the power source 1 in one housing.

[Effect]

In this invention, each controller CNT, ~CNTn,
Since the power source 1 is shared, the entire device can be downsized.

Moreover, each controller CNT.

The power supply to ~CNTn can be turned on and off individually, and each controller CNTo~CNTn can be reset individually, so even if one of the controllers fails, only the power to the failed controller can be turned off. After repair, the controller can be reset, so there is no need to stop the functions of other controllers, etc.

〔Example〕

FIG. 2 shows an embodiment of this invention.

Display devices DIS and DISn are connected to the controllers CNTa to CNTn, respectively.

In FIG. 2, 21 is a select signal generator;
2 is a decoder for a select signal, 23 is a relay driver, 24 is a changeover switch for instructing ON/OFF of the relay, 25 is a reset switch, and 26 is a driver for each controller. Relay driver 23
A relay RL is connected via a control line rβ0 to turn on/off its contacts. In Figure 2, controller C
Only the relays RL o and RL n that turn on and off the power to NTo and CNTn are shown, but in reality, the other controllers CNT+ and CNT2 (
(omitted in Fig. 2) - - also have relays RLI, RL,
- is connected, and a control line rj21 from the relay driver 23 to the relays RLI, RLZ-...
,rj! 2 (not shown) is connected.

Similarly, in FIG. 2, the signal line r from the reset driver 26 to the controller CNT and CNTn
Although only es, and resn are shown, in reality, the reset driver 26 to other controllers CN T
+, CN T t - also has a reset signal line r e
s , , re s z- are connected.

These select signal generation Pr21, decoder 22, relay driver 23, selector switch 24, reset switch 25, reset driver 26, etc. are provided in the sub-panel and housed in the housing 10.

In such a central control device that centrally controls a plurality of display devices, for example, a controller CNT. We will explain the recovery operation when a failure occurs.

First, the select signal generator 21 selects the controller C.
The decoder 22 generates a signal specifying the NT.
and sends it to the relay driver 23 and reset driver 26. Relay driver 23, reset
In the driver 26, the output from the decoder 22 connects the control line rI! to the controller CNT, respectively. . and selectively connects the reset signal line res6. Therefore, the selector switch 24 is turned on, and the control line r1. On the other hand, relay RL
Sends a drive signal to turn off the O contact. As a result, only the power of the controller CNT is turned off, so the board of the controller CNTO is pulled out and repaired.

After repairing the controller CNT, reinsert this base material into the device. After that, the relay driver 23 is driven by the select signal generator 21 and the decoder 22, and the CNT
, select and connect the control line rlo to
Turn on O. Further, the reset driver 26 is driven by the same select signal used to select the control line rllo of the CNT, and the reset signal line reso is selectively connected to the CNT. Then, in this state, the reset switch 25 is turned on to reset the CNT.

As a result, the CNT is reset and starts operating in a normal state.

In the above description, an example was explained in which the power supply is controlled using a relay, but it is of course possible to use other means such as a switching element in the present invention.

〔Effect of the invention〕

As described above, according to the present invention, simply by generating a signal instructing a specific controller from the select signal generator 21, it is possible to turn on/off and reset the power of that controller. Therefore, it becomes possible to repair and inspect a control device having a plurality of controllers, which has been miniaturized as described above, by stopping the operation of only the controller.

Further, the operation for this purpose is very simple, as it is only necessary to generate a specific selection signal by pressing a push button switch, and then operate a changeover switch and a reset switch, and there is no fear of erroneous operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the principle of the invention, FIG. 2 is a diagram showing an embodiment of the invention, and FIG. 3 is a diagram showing a conventional example. ■--Power supply, 2--Sub panel, 21-Select signal generator, 22-Decoder, 23-Relay driver, 24--Relay on/off switch, 25--
Reset switch, 26--Reset driver, CNT, ~CNTn--Conola, RLo "R
L n-・Relay. Patent Applicant: Fujitsu Ltd. Representative Patent Attorney Akira Yamatani Eiji I1 Figure 3

Claims (1)

[Claims] In a centralized control device having a plurality of controllers that share a power supply unit, there is provided a selection means (21) for selecting a controller, and a power supply circuit switching means (R) for each of the plurality of controllers.
L_o to RL_n) are provided, and a specific controller can be selected by the select signal output from the select means, and the power supply of the selected controller can be turned on/off and reset, thereby stopping the specific controller, A no-down method in a centralized control device that is characterized by being able to start up.