JPH09231097A - Cpu device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out a test after maintenance without stopping the operation of a system nor affecting the system at all. SOLUTION: A CPU device 8 includes an information transmitting/receiving part 1 which transmits and receives the information to and from an external device, and two processing parts 2 and 3 which perform the processing of the part 1. Both parts 2 and 3 have the same processing functions and same data structures and are formed independently of each other. Furthermore, the parts 2 and 3 are constituted so as to be connected to and disconnected from the part 1 and a test device 9 which carries out a test after the maintenance of software and data of both parts 2 and 3 by means of the switches 4, 5, 6 and 7 respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CPU device used in a system such as a supervisory control system that transmits and receives information and requires continuous operation.

[0002]

CPU used in a supervisory control system or the like
The device needs to send and receive information to and from an external device. Therefore, in such a CPU device,
Conventionally, one information transmitting / receiving unit for transmitting / receiving information and one processing unit connected to the information transmitting / receiving unit for performing the processing are provided.

In the processing section of the CPU device, maintenance of its software and data is required.
Since the test after the maintenance has one processing unit, normally, after the system is stopped, the test device is connected to the processing unit and the test data is transmitted and received between the processing unit and the test device. It is done by When the test result is good, the CPU device is put into actual operation.
Further, when the system cannot be stopped and continuous operation of the CPU device is required, the test after maintenance may be performed after the CPU device is in actual operation without stopping the system.

[0004]

When the system is stopped and the test is performed, the system cannot be operated during the test time. Therefore, the influence is great, and the system cannot be stopped by any means. In, it becomes difficult to deal with it. In addition, when the test is performed during the operation of the CPU device without stopping the system, if there is a defect in the maintained software or data, malfunction of the operating CPU device or data destruction occurs, and the data is restored. And for system function recovery,
There is a risk that a situation requiring a long system shutdown may occur.

Therefore, an object of the present invention is to provide a CPU device which can carry out a test after maintenance without stopping the system and without affecting the system at all.

[0006]

According to the present invention, in a CPU device having an information transmitting / receiving unit for transmitting / receiving information to / from an external device and a processing unit for performing the processing, the processing units have the same processing. The information processing unit is formed by a plurality of independent processing units having functions and the same data structure, and the plurality of processing units are respectively switched by a switch,
The processing unit is formed so that it can be connected or disconnected to a test device that performs a test after maintenance of software and data.

As a result, the information transmitting / receiving unit and the processing unit are
Since it is possible to arbitrarily connect or disconnect with the switch, it is possible to use one of the plurality of processing units for actual operation and the remaining processing units for maintenance. That is, one processing unit is connected to the information transmitting / receiving unit by a switch, and while performing the process of actual operation, after performing software and data maintenance for the remaining processing units, You can connect and perform any test.

When the test is completed, one processing unit is separated from the information transmitting / receiving unit, and the processing unit that has been tested is connected to the information transmitting / receiving unit so that this processing unit can be operated for actual operation. it can. Therefore, the test after the maintenance of the processing section can be performed without stopping the system and without affecting the system at all.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram of an embodiment of the present invention. In FIG. 1, a CPU device 8 is an information transmitting / receiving unit 1 that transmits / receives information to / from an external device (not shown).
And a first processing unit 2 and a second processing unit 3 that perform the processing. The first processing unit 2 and the second processing unit 3 have the same processing function and the same data structure, and are formed independently. First processing unit 2
Is formed so that it can be connected to or disconnected from the information transmitting / receiving unit 1 by a switch 4 for output data from the first processing unit 2 and a switch 6 for input data to the first processing unit 2. In addition, the second processing unit 3 uses the switch 5 for output data from the second processing unit 3 and the switch 7 for input data to the second processing unit 3 so that the information transmission / reception unit 1
Is formed so that it can be connected or disconnected.

The test apparatus 9 has an input port 10 and an output port 11, and the input port 10 and the output port 11 are formed so that they can be connected to or disconnected from the first processing unit 2 by the switch 4 and the switch 6, respectively. And switch 5 and switch 7, respectively.
Is formed so that it can be connected to or disconnected from the second processing unit 3.

Next, the operation of the above embodiment will be described. First, a case will be described in which the CPU device 8 is processed by the first processing unit 2 and the software and data of the second processing unit 3 are maintained while the CPU device 8 is in actual operation. In this case, the first processing unit 2 is connected to the information transmitting / receiving unit 1 by the switch 4 and the switch 6, and the second processing unit 3 is connected to the switch 5 and the switch 7.
Is open and is not connected to either the information transmitting / receiving unit 1 or the test apparatus 9.

In this state, maintenance is performed on the software and data of the second processing section 3. After the maintenance is completed, the transaction data of the first processing unit 2 is copied to the second processing unit 3 in order to match the transaction data. After that, the switches 5 and 7 are respectively connected to the input port 10 and the output port 11 of the test apparatus 9 so that the test data is transmitted and received between the test apparatus 9 and the second processing unit 3. Conduct a test. During this period, the first processing unit 2 also executes the process of transmission / reception with the external device by the information transmitting / receiving unit 1 independently of the second processing unit 3.
The function of actual operation of the U device 8 is not affected at all.

After the test with the test data in the test apparatus 9 is completed, the transaction data of the first processing section 2 is copied again to the second processing section 3, and the switch 7 is output from the output port 11 of the test apparatus 9. By disconnecting and connecting to the information transmitting / receiving unit 1, a test is performed on the actual operation data. That is, the actual operation data is input from the information transmitting / receiving unit 1 to the second processing unit 3 via the switch 7, and the output data from the second processing unit 3 is input via the switch 5.
Since it is transmitted to the input port 10 of the test apparatus 9, this is monitored by the test apparatus 9 to check whether there is any defect. Even if a defect is found in this state, the output data of the second processing unit 3 is not transmitted to the information transmitting / receiving unit 1 and is not used for the actual operation, so that the actual operation is not performed. It has no effect.

If no failure occurs in this test, the switch 5 is disconnected from the input port 10 of the test apparatus 9, is connected to the information transmitting / receiving unit 1, and the switches 4 and 6 are opened to make the first switch. By separating the processing unit 2 of the above from the information transmitting / receiving unit 1, the first processing unit 2 and the second processing unit 3 are replaced with each other, and the second processing unit 2 performs the processing of the main operation to perform maintenance and test. Is completed. The maintenance and testing of the first processing unit 2 may be performed in exactly the same manner as the second processing unit 3 described above.
The description is omitted.

Further, in the above embodiment, two of the first processing unit 2 and the second processing unit 3 are provided, but three or more may be provided in order to improve the reliability of the CPU device 8. .

[0016]

As described above, according to the present invention,
Without stopping the system to which the CPU device is connected,
In addition, maintenance and testing can be performed without affecting the system in operation at all.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a CPU device of the present invention.

[Explanation of symbols]

 1 Information Transmission / Reception Unit 2 First Processing Unit 3 Second Processing Unit 4 Switch for Output Data from First Processing Unit 2 Switch for Output Data from Second Processing Unit 3 6 First Processing Unit Switch for input data to 2 7 Switch for input data to the second processing unit 8 CPU device 9 Test device 10 Input port 11 Output port

Claims (1)

[Claims] 1. A CPU including an information transmitting / receiving unit for transmitting / receiving information to / from an external device and a processing unit for performing the processing.
In the apparatus, the processing unit is formed of a plurality of independent processing units having the same processing function and the same data structure, and the plurality of processing units are respectively switched by the switch, the information transmitting / receiving unit, software of the processing unit, and A CPU device, which is formed so that it can be connected or disconnected from a test device that performs a test after data maintenance.