JPS58172704A - Plant controller - Google Patents

Abstract

PURPOSE:To modify a program easily by prividing a writable memory for storing a control program in a controller, and transferring the control program from a portable loader. CONSTITUTION:This device consists of the controller A and the portable loader B connected to the controller A. The loader B is equipped with a main storage device 1b and a floppy disk 7 and further provided with a microprocessor 2b which operates according to the program stored in the ROM3b and transfers the control program from the disk 7 to the controller A. The controller A, on the other hand, has a main storage device ROM3a for storing a starting operation program, and microprocessor 2b which operates according to the program stored in the ROM3a to transfer the control program from the loader B to the device 2a of the controller A.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a plant control device, and is particularly suitable for use in process control and instrumentation control of water and sewage plants, steel plants, etc. Regarding a control device.

[Technical background of the invention and problems in the background art] Generally,
As a controller used for step control, etc., a programmable controller using a microprocessor, or a controller configured to perform a desired function using a programmable program, is often used. To make the controller programmable, use ICROM (Integrated Circuit Only Memory) or I/O with battery backup.
It is necessary to use a memory such as CRAM (Integrated Circuit Random Access Memory).

However, when used in a controller equipped with memory, the following problems arise.

First, the contents of the stored program are not fixed;
They are usually manufactured according to the structure of the process, and modifications often become necessary after the device is completed. Therefore, ICf (OMf), which takes time and effort to change the memory contents, is inconvenient for non-electronics when the process conditions change, and it requires the ninth 1ktIt to change the memory contents. There is a lot of power behind it.

On the other hand, if ICRAM is used, it is easier to change the program, but if the power goes out, the wax pond used as a backup must be replaced at the end of its life. There were problems such as memory contents being lost if a power outage occurred during replacement.

[Object of the Invention] An object of the present invention is to provide a 1111" control device that allows easy program modification in accordance with process changes and does not require replacement of the 4hiK reservoir.

Ru.

Summary of the Invention The control device of the present invention includes a controlling controller and a portable loader connectable to the controlling controller, each of which includes a main storage, a nonvolatile memory, and a microphone. ing. The portable loader further includes an auxiliary storage device that stores a control program. At startup, each of the two 1/4 sets operates according to the program stored in the non-volatile memory, and transfers the control program stored in the auxiliary storage of the portable reader to the main storage of the portable loader, and then transfers the control program to the main storage of the portable loader. data is transferred to the main memory of the controller.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the armor according to the present invention. In the same figure, people are using control tips 4. -La, reason-1, Puya. - There is a main memory (hereinafter referred to as FR) consisting of random access memory, etc.
AM) 1 a, lb, and microprocera fee (
(hereinafter referred to as CPU) 2a, 2b, non-volatile memory,
For example, 3 m of read-only memory (hereinafter referred to as ROM),
3b, and 4m directly connected to the power control unit (hereinafter referred to as PCU), 4
b, an input/output device [1j 5 a t 5 b, a data transmission device f116 m *6b, and t-1m 1. The portable loader B further includes a floppy disk (hereinafter referred to as FDD) 7 and an FDD as auxiliary devices.
J source switch 8. The controller A for 匍j@ is equipped with an operation switch 9 in addition to the description F.

The FDD 7 stores a control program and a portable loader program. ROM3 b is F
D l) 76) et al., It! For l fil! It stores a program for transferring the loader and portaple loader programs to the RAM 1b. The ROM 3m is used to transfer the control program from the porta-pull loader B to the control controller A and to transfer the control program from the porta-pull loader B to the control controller A.
A program for data transfer between the JIII controller A is stored.

The CPLI 2a operates according to a control program transferred from the FDD 7 and stored in the RAM 1a, and controls the process via the input/output device t5a.

The CPU 2b operates according to the portable loader program transferred from the FDD 7 and stored in the RAM 1b, and performs maintenance and monitoring of the control controller A via the input/output device 5b and the data transmission device 6b.

Operation switch 9 is a rounded switch that selects the startup method of the device, and when the save start method is selected, n is selected.
All contents of RAM1m of controller A for 1Jnll are transferred and saved to F1)D7,,t: of portable loader B, and after initialization is completed, the previously stored contents of any RAM1a are restored, allowing continued processing. become. When the normal start method is selected, the storage contents of RAMI a are not saved, but only initialization is performed. Normal start is selected when starting the device by turning on the source after 466 or stoppage of the control controller, etc., and the save start method is selected when restarting after stopping the control program. It is often done.

First, after cutting off or stopping the power to the field controller AOa, i
t source input, i by atonement wax! This section explains how to start the device. In this case, the operation switch 9 is operated to select the normal start method. Turn on the power (sometimes, PCU4m operates first, then CPU2a, RAMI
m, four sources of input/output device 15a are turned on. When these 11%lI are established, the operation shown in wg2 diagram, which will be described later, is ready.

The portable loader B, which has a diskette containing the corresponding control program, is connected to the 1llJIl controller, and when the power is turned on, the PCU4b operates first, and the CPU2b, RAM1
b, human output @1t5b's (source is input.Then, the bond established by these g sources, the operation that does not occur in Figure 11g2 is taken.
The operation performed by the PL 12a according to the program stored in the ROM 3m is shown, and the operation performed by the PL 12a according to the program stored in the ROM 3b is shown.

First, a source is put into Fl)L)7 of Votapull loader B (201), and when FDD7 becomes usable (202)
), portapruder B is confirmed to be ready (10
1). Next, the status of the operation panel operation switch is checked (102, 203).

As mentioned above, the normal start method is selected at the time of starting the bond due to area interruption, power outage, etc. Therefore, FDI
)7 to RAM1a @ transfer of public program (10
7-110, 209-213) are performed. That is, C
The PU1b sequentially transfers the control program block by block from the F'1JD7 to the RAM1b, and then transmits it to the 1151+ controller A via the data transmission device II and 6b, while the CPU1a transfers the control program from the voter loader B to the RAM1b. The control program transmitted every time is RA~1.
1aKw 4th storage. Next, move program control to the start program (116), +ilJ
While starting 1I141, the source of FDD7 is cut off (220).

This ends the startup operation (117.221).

Next, the case of restarting the control program after it is stopped will be described in a#4r. In this case, the save-start method is often selected.

In this case, before transferring the control program,
- The contents of RAM 1m of controller A are transferred to FL) 07 of voter pull loader B via pan data transmission device @ 6m and 6b (103-106, 204-2
08). The data transferred in this way is later analyzed by inputting the data 11' into a computer when the virtual loader B is connected to other information. Also,)'
L)l) A part of the hd6 data (block data for partial pressure) on 7 is transferred to the control program (103 to 106).
, 204 to 208), and R of the control controller A.
Transferred to AM1m (111-115, 215-21
9). Other than the above, it is the same as the first meeting of the normal start.

In response to changes in process conditions, the control program is changed to the following diskettes:
Replace it with one that stores the desired program.

[Effects of the Invention As described above, according to the present invention, 1. In the tilJ Mikawa controller's roller, use a memory that can store the same program as its own, and from the button pull loader, 1
Since we are planning to transfer the flJ groan program,
Each axis is the tL history of the program. In addition, since the control program can be transferred from the botple loader after a program stop, power cut, or stop, there is no need to provide a support LLC source in case of a power outage or the like. In addition, if a floppy disk is used as the auxiliary equipment for the Votapull loader, the diskette can be replaced, so it is possible to transfer control programs for a large number of controllers with one Votapull loader, making maintenance easier. is each axis.

[Brief explanation of the drawing]

Figure 1 is a block diagram of a control device according to an embodiment of the present invention, and Figures 2 (&) and (b) are flowcharts showing the operation of the device in Figure m1. A...Controller, B...Portable connection
Da, 1 a, 1 b--Shukigae device, 2&*2b
-v Ikropro Nanatsusa, 3a, 3b-Medium dedicated to indulgence, 4a, 4b・4@ groan control device, 5m, 5
b--input/output device, 6a, 6b--data transmission i device, 7--flochite isk, 8--m source switch, 9--operation switch. Client's agent Seirei Inomata 2nd figure (-6)

Claims (1)

[Claims] It consists of a controller for control and a portable loader connectable to the controller for control, and the portable loader has a main storage device, a non-volatile memory for storing a program for operation at startup, and a porta-pull loader for storing a control program. an auxiliary storage device that operates according to a program stored in the nonvolatile memory, transfers a control program from the auxiliary storage device to the device, and transfers a control program from the main storage device to the control device; The specified control controller includes a main storage device, a non-volatile memory for storing a program for operation at startup, and a non-volatile memory stored in the non-volatile memory of the control controller. A plant control device comprising: a microprocessor that operates according to a program and causes the control program to be transferred from the portable loader to a main storage device of the control controller.