JP2861125B2 - Program load save method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention requires that a plurality of controllers operate and that the operation contents of each controller be defined by loading a program from an external recording device. The present invention relates to a program load save method in a simple control system.

[Conventional technology]

Conventionally, in a control system having a plurality of controllers, each controller is connected to an external recording device storing a program via a common bus or via a changeover switch. Is loaded and saved by each controller individually accessing an external recording device via a common bus, a changeover switch and the like.

[Problems to be solved by the invention]

Conventionally, as described above, since each controller loads and saves a program by individually accessing an external recording device, a control program for loading and saving a program is required for each controller. In addition to the above problem, there is also a problem that avoidance means for avoiding contention for access to the external recording device is required.

An object of the present invention is to allow only a specific controller to have a control program for loading and saving a program, so that all controllers can load and save a program and eliminate the need for access conflict means. Is to do.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a program load / save method for loading and saving a program between an external recording device storing a program and a plurality of controllers. When a recording medium is provided and the external recording device is accessible only from a specific controller among the plurality of controllers, and the specific controller loads a program stored in the external recording device to another controller. For each of the controllers in each region, a program stored in the external recording device to be loaded into the controller is transferred to the common recording medium in block units, and a block is transferred to the controller each time transfer of one block is completed. Processing to instruct the loading of When the loading of the program to all of the other controllers is completed, all the other controllers are instructed to start up, and the other controllers are stored in the common recording medium by being instructed to load blocks. Is stored in a program recording medium under the control of its own controller, and is activated when startup is instructed. The specific controller is stored in a program recording medium under the control of the other controller. When the program is saved in the external recording device, the controller instructs, for each controller in each region, to save the program stored in the program recording medium under the controller in units of blocks. Every time a block is transferred to the common recording medium, The other controller instructed to save blocks in the external recording device, and instructed to save the program in block units, stores the program stored in the program recording medium under the control of its own controller in block units in the common recording medium. Forward.

[Action]

When a specific controller loads a program stored in an external recording device into another controller, the program stored in the external recording device to be loaded into that controller is shared by the controller in block units for each controller in each region. Each time the data is transferred to the recording medium and the transfer of one block ends, the controller is instructed to load the block. The other controller instructed to load the block stores the block stored in the common recording medium in a program recording medium managed by the controller. The specific controller instructs all other controllers to start up by completing the loading of the program to all other controllers.

When a specific controller saves a program stored in a program recording medium managed by another controller to an external recording device, the specific controller is stored in a program recording medium under the controller for each controller in each region. Instructing to save the program in block units, and in response to this instruction, each time the controller transfers a block to the common recording medium, the block is saved to an external recording device.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, in which a master controller 1, controllers 2-1 and 2-2, a common recording medium 3 including a dual-port RAM and the like, Program recording medium 4
Program recording media 5-1 and 5-2 under the control of controllers 2-1 and 2-2;
And an external recording medium 7 in which a program is stored, and interrupt signal lines 8-1, 8-2, 9-1, 9-2.

2 and 3 are explanatory diagrams of the operation of FIG. 1. The operation of the present embodiment will be described below with reference to the drawings.

When loading a program into the program recording medium 4 under its management, the master controller 1 accesses the external recording medium 7 via the external recording medium controller 6 and loads the program onto the program recording medium 4. Also,
When the program stored in the program recording medium 4 is to be saved in the external recording medium 7, the external recording medium 7 is accessed via the external recording medium controller 6, and the program stored in the program recording medium 4 is externally recorded. Save to medium 7.

Next, an operation when loading a program stored in the external recording medium 7 into the program recording media 5-1 and 5-2 under the control of the controllers 2-1 and 2-2 will be described with reference to FIG. I do.

In this case, the master controller 1 first accesses the external recording medium 7 via the external recording medium controller 6,
The program 10-1 for one block of the program to be loaded into the controller 2-1 is loaded into a predetermined area of the program recording medium 4, and an interrupt signal a for bringing the controller 2-1 into the base state is sent to the interrupt signal line 8-1 And the controller 2-1 is set to the ground state. Next, the master controller 1 transfers one block of the program 10-1 stored in a predetermined area of the program recording medium 4 to the common recording medium 3, and, when the transfer is completed, sends an interrupt signal b requesting data reception to the interrupt signal b. Apply to controller 2-1 via line 8-1.
The controller 2-1 loads the program 10-1 for one block stored in the common recording medium 3 into the program recording medium 5-1 and loads the program for one block by receiving the interrupt signal b. An interrupt signal c indicating completion is applied to the master controller 1 via the interrupt signal line 9-1.

When the interrupt signal c is applied, the master controller 1
Performs the same processing as described above for the next one block of the program 10-2. Hereinafter, the master controller 1
Until the completion of loading of the program to the controller 2-1 is recognized, that is, one block of the program 10-
Until the loading of N is completed, the same processing as described above is performed.

When the loading of the program to the controller 2-1 is completed, the master controller 1
Then, the same processing as described above is performed, and the programs to be loaded into the controller 2-2 are loaded block by block from the program 11-1 for the first block to the program 11-M for the last block. When recognizing the completion of the loading of the program to the controller 2-2, the master controller 1 sets the interrupt signal lines 8-1, 8
An interrupt signal d for instructing the controllers 2-1 and 2-2 to start up is added via the control signal -2, so that the controllers 2-1 and 2-2 start up and the own controller 1 also starts up.

Next, referring to FIG. 3, an operation for saving the programs stored in the program recording media 5-1 and 5-2 under the control of the controllers 2-1 and 2-2 to the external recording medium 7 will be described. explain.

In this case, the master controller 1 first sends the interrupt signal e instructing to save the program to the interrupt signal line 8-1.
Through the controller 2-1. Controller 2
-1 transfers the program 20-1 for one block stored in the program recording medium 5-1 under the control of the interruption signal e to the common recording medium 3,
When the transfer of the program 20-1 for one block is completed,
An interrupt signal f requesting the receipt of the program 20-1 is applied to the master controller 1 via the interrupt signal line 9-1.

Upon receiving the interrupt signal f, the master controller 1 reads out one block of the program 20-1 stored in the common recording medium 3 and stores it in the program recording medium 4, and further via the external recording medium controller 6. Then, the program 20-1 for one block stored in the program recording medium 4 is saved in the external recording medium 7. When the saving of the program 20-1 for one block is completed, the master controller 1 sets the program 20-2 for the next one block.
The same processing as described above is performed until the program stored in the program recording medium 5-1 is saved, ie, one block of the program 20-
Until the saving of N is completed, the same processing as described above is repeated.

When the saving of the program to the controller 2-1 is completed, the master controller 1
The same processing as described above is performed for the first block of the program 21 stored in the program recording medium 5-2 under the control of the controller 2-2.
The external recording medium 7 is saved from -1 to the last one block of the program 21-M.

〔The invention's effect〕

As described above, according to the present invention, only a specific controller among a plurality of controllers accesses an external recording medium, and the other controllers program in block units via a common recording medium in accordance with an instruction from the specific controller. Since the load and save of the program are managed by the above-mentioned specific controller, there is no need to provide means for avoiding access conflict as in the conventional example. There is an effect that it is not necessary to provide a control program for accessing the recording medium. Further, according to the present invention, since another controller is started up by an instruction from a specific controller, there is an effect that the start-up of a control system including a plurality of controllers can be centrally managed.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of an operation at the time of loading, and FIG. 3 is an explanatory diagram of an operation at the time of saving. In the figure, 1 ... Master controller, 2-1 and 2-2
…… Controller, 3 …… Common recording medium, 4,5-1,5-2
...... Program recording medium, 6 ... external recording medium controller, 7 ... external recording medium, 8-1, 8-2, 9-1, 9-2 ...
... Interrupt signal line.

Claims (1)

(57) [Claims] In a program load / save method for loading and saving a program between an external recording device storing a program and a plurality of controllers, a common recording medium accessible from each controller is provided. When the external recording device is accessible only from a specific controller among the plurality of controllers, and the specific controller loads a program stored in the external recording device to another controller, the controller at each location is used. Each time a program stored in the external recording device to be loaded into the controller is transferred to the common recording medium in block units, the controller is instructed to load a block each time transfer of one block is completed. And all the other components When the loading of the program to the roller is completed, all the other controllers are instructed to start up, and the other controllers instruct the blocks stored in the common recording medium by instructing the loading of the blocks. The specific controller stores the program stored in the program recording medium under the control of its own controller and starts up when the start-up is instructed. The specific controller stores the program stored in the program recording medium under the control of the other controller in the external recording device. When saving, the controller instructs, for each controller in each location, to save a program stored in a program recording medium under the controller in block units, and in response to this instruction, the controller stores the program in the common recording medium. Each time a block is transferred, that block is stored in the external recording device. The other controller instructed to save the program in block units transfers the program stored in the program recording medium under the control of the controller to the common recording medium in block units. Program load save method.