JPS5829541B2 - switching control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching control device in an electronic computing organization in which a central processing unit and an input/output device are connected through a channel interface switch.

A conventional switching control device will be explained with reference to FIG.

The switching information is set by the switching information specifying section 21 and stored in the switching information storage section 30 via the switching information receiving section 26.

The monitor display command is issued from the monitor display instruction section 22,
The signal is sent to the monitor display control section 34 via the monitor display reception section 27 and the switching control section 29.

When the monitor display control unit 34 receives this monitor display command signal, it reads switching information from the switching information storage unit 30 and displays it on the monitor display unit 31.

The switching command is issued from the switching instruction section 23, and is sent via the switching instruction receiving section 28 and the switching control section 29 to the switching instruction sending section 32?
This will be sent.

When the switching command sending section 32 receives this signal, it reads the switching information from the switching information storage section 30 and sends it to the channel interface switch.

To check after switching, the abnormality detection section 35 reads and compares the switching information from the switching information storage section 30 and the connection state signal from the connection state reception section 33 according to instructions from the switching control section 29. In case of an error, A display is made on the error display section 25.

The connection state of the input/output device is received by the connection state receiving section 33 and displayed on the connection state display section 24 .

As described above, the monitor display function of the conventional switching control device only displays the switching information read from the switching information storage section 30 on the monitor, and is independent from other functions.

Therefore, the switching instruction section 23 is often operated without checking the monitor display or by misunderstanding the displayed content.
As a result, inconveniences such as disconnection of the central processing unit and input/output device that should not be disconnected based on erroneous switching information, resulting in system failure, are likely to occur.

An object of the present invention is to provide a switching control device that prevents the above-mentioned erroneous switching accidents.

In order to achieve this object, the present invention provides an interlock relationship between the switching instruction function and the monitor display function, so that the switching instruction operation can only be performed after the monitor display operation. The monitor function is designed to prevent users from forgetting the information or displaying too much information on the monitor, and to determine whether or not the switching information is appropriate, displaying the monitor information only when appropriate, and at the same time allowing the acceptance of switching commands. This prevents erroneous switching due to misunderstanding of the monitor display.

Next, embodiments of the present invention will be described in detail.

FIG. 2 is a block diagram showing an example of a switching control device according to the present invention.

The switching information is set by the switching information specifying section 1 and sent to the switching information receiving section 6.

The monitor display command is issued from the monitor display instruction section 2 and sent to the monitor display reception section 7.

The switching instruction is issued by the switching instruction section 3 and sent to the switching instruction receiving section 8.

The switching control section 9 receives signals from the monitor display receiving section 7 and the switching command receiving section 8, and the switching information storage section 10 and the display control section 11.
．． A control signal is sent to the switching command sending unit 12.

The switching information storage section 10 receives and stores switching information from the switching information receiving section 6 and also sends a control signal to the monitor display receiving section 7, display control section 11, and switching information sending section 12.

The display control unit 11 receives switching information from the switching information storage unit 10, a connection state signal from the channel switch, and a control signal from the switching control unit 9, performs various display controls, and performs various display controls such as switching command reception unit 8, connection A control signal is sent to the status/monitor display section 4 and error display section 5.

Next, the operation of this embodiment will be described.

When the operator specifies switching information in the switching information specifying section 1,
This switching information is stored in the switching information storage section 10 via the switching information receiving section 6.

When the switching information is stored, the switching information storage unit 10 sends a monitor instruction permission signal to the monitor display receiving unit 7.

After the monitor display receiving section 7 receives this monitor display permission signal, when the operator instructs the monitor display instruction section 2 to perform monitor display, a monitor display start signal is sent to the switching control section 9 via the monitor display receiving section 7. Send out.

When the switching control unit 9 receives this monitor display start signal,
A monitor display command is sent to the display control unit 11.

When the display control section 11 receives the monitor display command from the switching control section 9, it performs the following control based on the switching information received from the switching information storage section 10 and the connection state signal received from the channel switch.

(b) If the switching information received from the switching information storage unit 10 is "connected", it is determined whether the corresponding input/output device is already connected to another central processing unit or not from the channel switch. Check by connection status signal,
If it is already connected to another central processing unit, an error instruction is given to the error display section 5, and the operation abnormality lamp of the error display section 5 is turned on.

In addition, if the corresponding input/output device is not connected to another central processing unit, the connection status display section 4 is instructed to flash the lamp corresponding to the specified switching information on the connection status/monitor display section 4 and display it on the monitor. Send out.

(b) If the switching information received from the switching information storage unit 10 is "disconnected", information is received from the channel switch as to whether the corresponding input/output device has already been disconnected from all central processing units. The connection state signal is checked, and if the connection status signal has already been disconnected from all central processing units, an error instruction is given to the error display section 5 and an operation error lamp is turned on.

Also, if it is connected to any central processing unit, the corresponding display lamp will blink and a command will be sent to the monitor display section 4 to display the connection status/monitor display. When determining that the information has been set, the display control unit 11 sends a switching command permission signal to the switching command receiving unit 8 to permit reception of the switching command, and waits for an instruction from the operator to send the switching command.

When the operator operates the switching instruction unit 3 to issue an instruction to send a switching command, a switching command signal is sent to the switching control unit 9 via the switching command receiving unit 8 .

Upon receiving the switching command signal, the switching control unit 9 instructs the switching information sending unit 12 to send switching information.

When the switching information sending unit 12 receives this instruction, it sends switching information to the channel switch based on the switching information stored in the switching information storage unit 10.

When the switching is completed at the channel switch, a switching completion signal is output from the channel switch, which is received by the stimulant IJ control unit 11. The display control unit 11 stores this completion signal and the switching information storage unit 10. If they match, the connection status is displayed on the connection/monitor display unit 4, and at the same time, a reset signal is sent to the switching information storage unit 1° to reset the stored switching information and complete the process normally. If they do not match, an error will be displayed on the error display unit 5 and the switching information of the input/output device that is the target of the error will be displayed on the connection status/monitor display unit 4/! This message is displayed and the process ends abnormally.

In this embodiment, the connection status display and monitor display are performed on a common display section 4, making it easy to compare the contents of the monitor display and the connection status, and at the same time reducing the number of display sections to prevent misidentification of the display. reducing opportunities for

In addition, the display control units for the connection status/monitor display unit 4 and error display unit 5 are integrated into the - display control unit 11 to simplify the process and reduce the number of parts, thereby reducing costs and improving reliability. ing.

Incidentally, in the conventional device as shown in FIG. 1, the monitor display, connection status display, and error display were each controlled using separate display control sections.

FIG. 3 shows an example of the display control circuit 11.

SW1 is a signal from the channel switch, and is a contact that is made while the corresponding input/output device is connected to the central processing unit.

SW2 is a contact that is made in response to a signal from the switching control section 9 from when a monitor instruction is issued until the switching control is completed.

SW3 and SW4 are contacts that operate with a pulse signal for blinking the lamp L of the connection status/monitor display section 4 in response to a signal from the switching control section 9, and S'w5 is a signal from the switching information storage section 10. This is a contact that is made only when receiving connection information.

SW6 is a signal from the switching control section 9, and is a contact that is made from when the monitor is specified until when the switching command is set.

SW7 is a contact that is made in response to a signal from the switching control section 9 during an error check after a switching operation is performed.

A, B. C is a relay, D is a diode, ao, al, a
2b0. bl and C are contacts of relays A, B, and 0, respectively.

The operation is as follows.

(I) If a monitor instruction is issued while the switching information is “connected” and the corresponding device is already connected to the central processing unit, the 0■ As signal is sent to relay B via SWl.
and contacts SW2゜SW5. Sent to relay A via bO.

When relay A operates, a fault signal is sent to error display section 5 by (al, SW6).

(n) If a monitor instruction is given when the switching information is "PACK CONNECTED" and the corresponding device is disconnected from all central processing units, the connection status/monitor display lamp L is displayed by (y SW5 B 8V3). will flash, indicating that the appropriate switching information has been set.

(If a monitor instruction is given when the switching information is ``disconnected'' and the corresponding device has already been disconnected from all central processing units, relay C will operate due to (b-8W5) and a failure will occur due to 0-8W6). The signal is error display section 5
sent to.

(IV) If you specify a monitor when the switching information is "disconnected" and the corresponding device is already connected to one of the central processing units, (SWl, SW2, b1SW4)
The display lamp L blinks to indicate on the monitor that appropriate switching information has been set.

(■ If the command sent to the channel switch is "connect" and the response from the channel switch is "connect,"
WI・SW2・SW5・bo) causes relay A to operate, and (SWl・SW2・ao) causes the connection indicator lamp L to remain lit, indicating that the connection operation has been completed normally.

(2) If the command sent to the channel switch is "Connect" and the response from the channel switch is "Disconnect", (
C-a2/SW7) causes the fault signal to be displayed on the error display section 5.
sent to.

In addition, the connection status/monitor display lamp L corresponding to the channel switch that did not operate according to this command (bo/SW
5・bl・SW3') to blink.

(b) If the command sent to the channel switch is "disconnect" and the response from the channel switch is "disconnect",
The lamp L is turned off by 8w1 and SW5.

In other words, it can be seen that the separation has been completed normally.

(2) If the command sent to the channel switch is 'disconnect' and the response from the channel switch is 'connect', relay B is activated by contact SWI, and relays A and C are restored by bo・5W5), so (C・a2・SW7)
A fault signal is sent to the error display section 5.

At this time, the connection status/monitor display lamp L corresponding to the channel switch that did not operate as instructed (SWI/
SW2, bl, 5W4) causes it to blink to indicate an abnormality.

Note that FIG. 3 shows only the circuit that controls the display section 4.5 of the display control section 11.

It goes without saying that the display control unit 11 is also provided with a circuit for sending a reset signal to the storage unit 10 and a switching command permission signal to the switching command receiving unit 3.

As described in detail above, according to the present invention, it is possible to avoid inconveniences such as disconnecting an input/output device that should not be disconnected from the central processing unit, resulting in a downtime, and the effect is significant.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a conventional switching control device.
FIG. 2 is a block diagram showing an example of a switching control device according to the present invention, and FIG. 3 is a circuit diagram showing an example of a display control section in FIG. 1-...Switching information specification section, 2...Monitor display instruction section, 3...Switching instruction section, 4......
Connection status/monitor display section, 5...error display section, 6...switching information receiving section, 7...monitor display receiving section, 8...switching Command receiving section, 9...
...Switching control section, 10...Switching information storage section, 11... Display control section, 12... Switching information sending section.

Claims (1)

[Claims] 1. Storing the switching information specified by the switching information specifying means in a storage means, and reading out the switching information from the storage means at the time when a switching command is issued from the switching instruction means, and intervening between the central processing unit and the input/output device. In a switching control device configured to send a signal to a channel interface switch, a monitor display instruction means, when a monitor display command is issued from the means, a connection state signal from the channel switch and switching information in the storage means; are compared, and when the switching information is appropriate, the monitor display means is made to display a monitor display corresponding to the switching information, and at the same time, acceptance of the switching command is permitted, and when the switching information is inappropriate, the above-mentioned A switching control device comprising means for prohibiting reception of a switching command.