JPH03256126A - Process data copying system in replacing memory - Google Patents

Abstract

PURPOSE:To make it possible for a worker having no expert knowledge to surely execute work without requiring a specific maintenance device by incorporating an automatic process data copying function in a system and transferring data between new and old IC memory cards. CONSTITUTION:A power supply for a CPU is turned off and an unupdated main CPU IC memory card 8 is transferred and mounted on a sub-CPU 7. On the other hand, a new IC memory card 2 obtained after changing a program is mounted on the main CPU 1. When a CPU power supply is turned on under this status, this system is automatically started and data copying processing is executed. After ending the copying operation, the IC memory card on the sub-CPU 7 is returned to the original sub-CPU IC memory card to restart the system. Consequently, maintenance work including program correction can be surely executed even by a beginner with the simple procedure without using a specific maintenance device.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method for maintaining process data continuity during memory replacement during maintenance work in a microcomputer device [Prior Art] In a conventional device, an IC card reader/writer catalog(
Hitachi Maxell, Ltd. IC card system catalog 86
As shown in 1.9.20 (issued ■), when a program modification is required due to a change in function, etc., if the 10 memory card is replaced to replace the memory contents, the data will be stored in the same memory. The existing process data was also lost, making it impossible to maintain data continuity. For this reason, methods have been used, such as giving up on data continuity or connecting a maintenance device to temporarily save process data and reloading it into memory after replacement.

[Problem to be solved by the invention]

The above-mentioned conventional technology has the problem that a special device such as a maintenance device must be prepared and a worker with specialized knowledge must carry out the work, which limits the number of workers.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method that does not require any special maintenance equipment for process data copy work associated with memory exchange, and allows even an operator without specialized knowledge to perform the work reliably.

[Means to solve the problem]

In order to achieve the second object, the present invention has a built-in automatic copying function for process data and transfers data between the old and new IC memory car 1.

[Effect]

The process data automatic copy function is available at the time of system startup.
It determines whether or not the own program is running on the hardware that it is originally intended to run on, and determines whether or not the program is running on the hardware that is originally intended to run.
- Functions as a copy source when running on software. Therefore, by installing the old 1G memory cart before the change in the other computer, it can operate as a copy data sending side. On the other hand, the old and new c-memory carts after the program change are installed and operated on the computer where they were originally intended to operate, stop other programs upon receiving a copy request, and function as a copy data sending side.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

Figure 1 shows the overall configuration. The system in this example is main C.
Consists of two CPUs: PU and sub-CPU.
Each can implement memory and operate independently. 1 is the main CPU and display device 3. Keyboard 4. Man-machine function with system operator via printer 5,
and handle process control. A program and process data for this purpose are stored in the IC memory card 2. 7 is a sub CPU that connects the terminal device 12 and the transmission line 11
Performs input/output with the process side via. Process input/output data is sent to the sub CPU 7 and the main CPU via the transmission line 10.
Receipts are passed and processed between PUIs. The IC memory cards 2 and 8 are identical in terms of hardware, and only differ in stored programs and data.

6 and 9 are main CI in the program) U, sub CP
U is a setting switch for recognizing which hardware the CPU is running on, and is set for each CPU. The process data copy procedure associated with maintenance work in the present invention is performed as follows.

(For the main CPU before switching off the power to I + CPU) C
Move the memory card to the sub CPU side and install it. Installation is as simple as inserting a 10 memory card into the connector.

■ The main CPU 12 implements a new C memory cart after changing the program.

■ If you turn on the CPU power in this state, the system will automatically start and data copy processing will be executed.

- After copying is complete, return the icC memory cart on the sub CPU side to the original ic memory card for the sub CPU and restart the system.

The work is completed with the above simple operations.

FIG. 2 explains the procedure for conventional maintenance work. The configuration of the main CPU is the same as shown in Figure 1. After connecting the maintenance device 13 and temporarily saving the process data to the memory inside the maintenance device, replace the main CPU's IC memory card and replay the saved process data. It is necessary to rot. This maintenance device was operated by a worker with specialized knowledge.

Next, the processing contents of the automatic copy function in the present invention will be explained using FIGS. 3 and 4.

FIG. 3 shows the program startup management process in the main CPU IC memory card at the time of system startup.

In block a, the data of the setting switch 6 or 9 is taken in, and in block b it is determined on which hardware, the main CPU or the sub CPU, the program is running. Main C
If the program is running on the PU, a normal online control program group is initially activated in block C and the program ends. Block d is a process added for the present invention, in which only the process data copy program is activated, and the normal online control program group is not activated. This prevents process data from being changed by online programs.

FIG. 4 is a flowchart showing an overview of process data copy processing. A data request is made from the main CPU side to the sub CPU and the sub CI'l t
Cheetah copy processing is performed via the transmission line in the procedure of returning response data from J. On the main CPU side, block g"'
-m is added, and the entire copy process is added on the sub CPU side. When the main CPU side receives a data copy request at e''-g, it stops the online control programmer 11 group at block h to prevent the online control program from operating and malfunctioning during process data copying. m receives the copy data from sub CI) U, and data node 1 added to the received data
- Set the received data in the data area according to the response and data length. On the sub CPU side, according to the copy area information set in advance in memory,
Transmission of copy data is repeated, and when all data transmission is completed, block L transmits copy completion and the process ends.

〔Effect of the invention〕

According to the present invention, maintenance work including program correction can be performed in a simple procedure without using any special maintenance equipment, so even beginners without specialized knowledge can perform maintenance work reliably.

Furthermore, since the operating procedure is simple, the work time can be shortened, so the online system downtime associated with maintenance work can be shortened.

[Brief explanation of drawings]

FIG. 1 is a system block diagram showing an embodiment of the present invention;
Figure 2 is a block diagram showing an example of conventional maintenance work;
FIG. 4 is a flowchart 1 showing an overview of the process data automatic copying process of the present invention.

Claims (1)

[Claims] 1. In a system including a plurality of computers connected by a data communication path and an IC memory card, the i
The c memory card is installed in the other computer, the new IC memory card after the program change is installed in the computer to be changed, and the process data part is transferred between the two computers, and the process at the time of memory card exchange is performed. A process data copying method when replacing memory, characterized by the addition of an automatic copying function to maintain data continuity.