JPH03291746A - Supervising and controlling method for composite computer system - Google Patents

Abstract

PURPOSE:To easily supervise and control the operational state of each constituting computer by outputting operational state signals showing the operational states from every equipment coupled to an n:n transmission system and supervising the operational state of the other equipment according to the signal in each equipment. CONSTITUTION:A computer 1 is operated as a main system and a computer 2 is operated as a slave system. The operational state signal of the computer 1 is stored through an n:n transmission system 5 to areas 23 of respective shared memories 8, 9 and 10, and the operational state signal of the computer 2 is stored through the transmission system 5 to areas 24 of the respective memories 8,9 and 10. When the computer 1 breaks down, the change of alternating the operational state signal to be outputted from the computer 1 is stopped. Then, the computer 2 immediately detects the stop of this change from the 23 of the memory 9 after the lapse of supervisory time, recognizes the stop of the computer 1 switches the operational state from the slave system to the main system and outputs the operations state signal after changing it. A controller 6 recognizes it from values stored in the 23 and 24 of the memory 10 that the computer 1 stops the operation and that the operation is started after the computer 2 is changed from the slave system to the main system, and the control output value of the computer 2 is inputted so as to continue the control of the controller.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to a compound computer system in which a plurality of computers are connected through a transmission system, and in particular, each component computer is capable of controlling the operation of other component computers. This invention relates to a method for monitoring and controlling a compound computer system that monitors its status.

(Prior Art) Conventionally, in a compound computer system in which multiple computers are connected by a transmission system, the operating status of each constituent computer is outputted from a contact input/output device provided for each computer to the transmission system, and other The component computers input the contact outputs and recognized the operating status of the other computers that make up the transmission system.

(Problem to be Solved by the Invention) However, as described above, in the method of detecting the operating status of other computers making up the transmission system by contact output, each constituent computer needs to be equipped with a contact input/output device. Furthermore, in order to improve the reliability of the contact input/output device, it was necessary to make it redundant.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for easily monitoring and controlling the operating status of each constituent computer of a compound computer system in which a plurality of computers are connected through a transmission system. do.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the problems described above, the present invention provides monitoring of a complex computer system having an n transmission system that connects a plurality of computers and transmits information. In the control method, each calculator outputs an operating state signal that constitutes one cycle with a plurality of values corresponding to its own operating state to an n:n transmission system, and inputs operating state signals from other computers. The operating status of the computer is recognized.

(Operation) An explanation will be given using FIG. 3, taking as an example two computers connected to a transmission system. FIG. 3 shows two computers connected to the nun transmission system, where each computer outputs its own operating state to the transmission system 5 via the transmission station 3. The value representing the operating state is a plurality of values representing the operating state of the computer or the state in which a certain function is being performed, for example, an operating state signal in which two different values constitute one cycle.

The operating state signal output from the computer is transmitted to the computer 2 via the transmission system 5 and the transmission station 4.

The computer 2 recognizes that the computer 1 is operating normally when two different values are alternately transmitted within one cycle of the operating status signal from the computer 1 within a monitoring period of one cycle or more, and
If the same value continues during the cycle and no change occurs, the computer 1 recognizes that the operation has stopped. Further, the two values change alternately, and if this value changes to a value indicating an operating state different from the previous cycle, the computer 1 recognizes that the operating state has changed to perform another function. The following explanation is for the case where the operating state signal is transmitted from the computer 1 to the computer 2, but the same applies to the case where the operating state signal is output from the computer 2 to the computer 2. In addition, although the above explanation uses two computers for ease of understanding, the same applies to the case of one computer.

Moreover, although the case where the operating state signal has two different values has been described, it is also possible to use three or more values.

(Example) An example of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a block diagram showing the configuration of a compound computer system to which the supervisory control method of the embodiment is applied.

In FIG. 1, computer 1 passes through transmission station 3, computer 2 passes through transmission station 4, and control device 6
is connected to the transmission system 5 via the transmission station 7. Each transmission station 3.4.7 has a shared memory 8.9.10. This shared memory 8.9.
10 have the same configuration, and the transmission areas of transmission stations 3, 4, and 7 are allocated as 23 for transmission station 3, 24 for transmission station 4, and 27 for transmission station 7. The data output to the transmission area is transmitted to the corresponding areas of all other stations via the transmission system 5. In this way, data output from one station is transmitted to all other stations n:n
Transmission is achieved.

The computer 1 and the computer 2 have a dual configuration, forming a master system and a slave system, and the control device 6 transmits the control output value of either the main system, either the computer or the computer 2, to the transmission system 5 and the transmission station 7.
It is a controller that performs process control by receiving input via the

The operation of this embodiment configured as above will be explained using FIG. 2. FIG. 2 is an explanatory diagram showing changes in the operating state signal stored in the shared memory 8.9.10. The operating state signal consists of two numerical values that represent the operating state of the computer] 1 and 12, and the duration of each numerical value is (
It is periodically output as shown in (a) at the update interval 13 shown in b) and stored in the shared memory 8.9.10. Calculator 2. The control device 6 receives one of the operating state signals as shown in (c).
The period of the cycle is defined as a monitoring time 14, and if the value of 11.12 does not change alternately within this time 14, it is determined that the computer 1 has stopped operating.

Computer 1 operates as a main system and computer 2 operates as a slave system, the operating state signal of computer 1 is tl and 12 alternately output to constitute one cycle, and the operating state signal of computer 2 is 21 and 22 alternately output. It is assumed that the output constitutes one cycle. The operating state signal of the computer 1 is sent to each shared memory 8, 9, and 10 via the transmission system 5.
23 of the computer 2, and the operating state signal of the computer 2 is stored in the transmission system 5.
24 of each shared memory 8.9.10.

The control device 6 recognizes the one-cycle signal consisting of 1] and 12 stored in 23 of the shared memory 10, determines that the computer 1 is the main system, inputs the control output value of the computer 1, and controls the controller. conduct.

When the computer 1 fails, the operating status signal output from the computer 1 will continue to output 11 or 12, and the alternating changes will stop. Then, the computer 2 detects the stoppage of this change from 23 in the shared memory 9 immediately after the monitoring time 14 shown in FIG. system, and set the operating status signals to 21 and 22.
to 11 and 12 and output. The control device 6 uses the shared memory] from the values stored in 28 and 24 of 0 to the computer 1.
recognizes that the computer 2 has stopped operating and the computer 2 has started operating from the slave system to the main system, inputs the control output value of the computer 2, and continues controlling the controller. When computer 1 is stopped and restarted while computer 2 is operating as the main system because the failure of computer 1 is fixed and the computer 1 is restarted, computer 1 detects that computer 2 is the main system by storing information in 24 of shared memory 8. It is recognized from the stored value, starts up as a slave system, and outputs an operating status signal as a slave system.

'' In the second embodiment, the operating state signal was described as representing the operating state of the computers 1 and 2, but the operating state of the functional unit executed by each computer is expressed using a periodic signal consisting of a numerical value corresponding to each operating state. By doing so, it is possible to monitor each computer in functional units. Further, by outputting an operating state signal indicating the operating state of all equipment connected to the nun transmission system, including not only the computers 1 and 2 but also the control device 6, it becomes possible to monitor all equipment in the transmission system.

[Effects of the Invention] As explained above, according to the compound computer system monitoring and control method of the present invention, each device connected to an n:n transmission system outputs an operating state signal representing its operating state, and each device The operating status of other equipment can be monitored from the signal.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a compound computer system to which a supervisory control method according to an embodiment of the present invention is applied, FIG. 2 is a diagram illustrating operating status signals of the method according to the embodiment, and FIG. FIG. 3 is a diagram showing the basic configuration. 1.2... Computer, 3, 4.7... Transmission station, 5... NUN transmission system, 6... Control device, 8, 9
゜10...Shared memory.

Claims (1)

[Claims] In a method for monitoring and controlling a complex computer system having an n:n transmission system that connects a plurality of computers and transmits information, each computer uses a plurality of values corresponding to its own operating state. 1
A method for monitoring and controlling a complex computer system, characterized by outputting operating state signals constituting a cycle to the n:n transmission system and inputting operating state signals from other computers to recognize the operating states of other computers. .