WO2017098585A1

WO2017098585A1 - Control system and control device

Info

Publication number: WO2017098585A1
Application number: PCT/JP2015/084439
Authority: WO
Inventors: 宏和永井
Original assignee: 三菱電機株式会社
Priority date: 2015-12-08
Filing date: 2015-12-08
Publication date: 2017-06-15
Also published as: JP6113381B1; JPWO2017098585A1; CN107046809A; CN107046809B

Abstract

Provided is a control system (1), comprising: a drive system control device (5D), further comprising an external storage medium storage unit (40D) which stores, in a detachable external storage medium (100D), information which has been acquired from devices (2, 3); and a standby system control device (5W) which is connected to the drive system control device (5D). The control system (1) further comprises a drive system collection control unit (22D) which switches the storage destination of the information from the external storage medium (100D) to an external storage medium (100W) of the standby system control device (5W) before the volume of information to be stored in the external storage medium (100D) exceeds the available space on the external storage medium (100D). The control system (1) further comprises a standby system collection control unit (23W) which switches the storage destination of the information from the external storage medium (100W) of the standby system control device (5W) to the external storage medium (100D) after the available space of the external storage medium (100D) has been increased.

Description

Control system and control device

The present invention relates to a control system and a control device for controlling equipment in the FA (Factory Automation) field.

∙ Equipment in the FA field is generally realized by combining multiple types of equipment. A plurality of devices constituting facilities in the FA field are controlled by a control system including a plurality of programmable controllers that are control devices that integrate control processing and information processing (see Patent Document 1).

JP 2008-40611 A

The programmable controller includes a storage device that stores information acquired from the device. As the storage device, a device that stores information in a removable external storage medium may be used. When the capacity of information that the storage device attempts to store in the external storage medium exceeds the free capacity of the external storage medium, the programmable controller overwrites the area in which the information is already stored in the external storage medium or stops acquiring information. .

When a programmable controller overwrites information in a storage area that already stores information in an external storage medium or stops acquiring information, it cannot acquire information that is continuous in time series, and needs to acquire information again. May occur and work efficiency may deteriorate.

The present invention has been made in view of the above, and an object of the present invention is to obtain a control system capable of suppressing deterioration of work efficiency.

In order to solve the above-described problems and achieve the object, the present invention provides a first control device having storage means for storing information acquired from a device in a removable external storage medium, and a first control device. And a second control device connected to one or more. The control system switches the storage destination of information from the external storage medium to the storage medium of the second control device before the amount of information before storing in the external storage medium exceeds the free capacity of the external storage medium. A destination switching unit is provided. The control system includes a second storage destination switching unit that switches the information storage destination from the storage medium of the second control device to the external storage medium after the free space of the external storage medium increases.

The control system according to the present invention has an effect of suppressing the deterioration of work efficiency.

The figure which shows the structure of the control system which concerns on Embodiment 1. The figure which shows the hardware constitutions of the computer of the control system which concerns on Embodiment 1. The figure which shows the hardware constitutions of the control apparatus of the control system which concerns on Embodiment 1. FIG. The flowchart which shows an example of operation | movement of the drive system control apparatus of the control system which concerns on Embodiment 1. FIG. The flowchart which shows an example of a part of operation | movement of the standby type control apparatus of the control system which concerns on Embodiment 1. FIG. The figure which shows the structure of the control system which concerns on Embodiment 2. The flowchart which shows an example of a part of operation | movement of the standby type | system | group control apparatus of the control system which concerns on Embodiment 2. FIG. The figure which shows the structure of the control system which concerns on Embodiment 3. The figure which shows the hardware constitutions of the control apparatus of the control system which concerns on Embodiment 3.

Hereinafter, a control system and a control device according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a configuration of a control system according to the first embodiment. The control system 1 constitutes equipment in the FA field, and as shown in FIG. 1, a plurality of

devices

2 and 3 installed in the equipment and a plurality of control devices 5 connected to the plurality of

devices

2 and 3. And a computer 6 connected to the control device 5. In the first embodiment, the control system 1 includes two

devices

2 and 3, but is not limited to two. In the first embodiment, the device 2 and the device 3 are sensors or driving devices. Examples of the sensor include a sensor that detects a flow rate, pressure, concentration, or temperature installed in the facility. Examples of the drive device include a drive device that performs an operation that is a switch, an adjustment valve, a solenoid valve, a motor, or a pump installed in the facility.

The computer 6 creates a control program to be executed by the control device 5 and transmits it to the control device 5. The control device 5 controls the

devices

2 and 3 by executing a control program. In the first embodiment, the control device 5 is a programmable controller (Programmable Logic Controllers (PLC)). The programmable controller is defined by JIS (Japanese Industrial Standards) B 3502: 2011.

FIG. 2 is a diagram illustrating a hardware configuration of a computer of the control system according to the first embodiment. The computer 6 according to the first embodiment executes a computer program, and as shown in FIG. 2, a CPU (Central Processing Unit) 61, a RAM (Random Access Memory) 62, and a ROM (Read Only Memory). ) 63, a storage device 64, an input device 65, a display device 66, and a communication interface 67. The CPU 61, RAM 62, ROM 63, storage device 64, input device 65, display device 66, and communication interface 67 are connected to each other via the bus B.

The CPU 61 executes programs stored in the ROM 63 and the storage device 64 while using the RAM 62 as a work area. The program stored in the ROM 63 is BIOS (Basic Input / Output System) or UEFI (Unified Extensible Firmware Interface), but the program stored in the ROM 63 is not limited to BIOS or UEFI. In the first embodiment, the program stored in the storage device 64 is an operating system program and an engineering tool program. However, the program stored in the storage device 64 is not limited to the operating system program and the engineering tool program. In the first embodiment, the storage device 64 is an SSD (Solid State Drive) or an HDD (Hard Disk Drive), but the storage device 64 is not limited to an SSD or an HDD.

The input device 65 receives an operation input from the user. In the first embodiment, the input device 65 is a keyboard or a mouse, but is not limited to a keyboard or a mouse. The display device 66 displays characters and images. In Embodiment 1, the display device 66 is a liquid crystal display device, but is not limited to a liquid crystal display device. The communication interface 67 communicates with the control device 5 via the network N. The network N is a computer network that connects the computer 6 and the two control devices 5 so that they can communicate with each other. In the first embodiment, the network N is a LAN (Local Area Network) installed in the FA facility.

In the first embodiment, two control devices 5 are provided and connected to each other via a network N. The two control devices 5 are connected to the

same devices

2 and 3 and made redundant with each other, but three or more control devices 5 may be provided and not made redundant with each other.

One of the two control devices 5 acquires and stores information on the

devices

2 and 3 and controls the operation of the

devices

2 and 3. The other of the two control devices 5 acquires and stores information on the

devices

2 and 3 and maintains a standby state while controlling the operation of the

devices

2 and 3. In the first embodiment, the standby state is a so-called standby power supply mode for power saving, and is in any one of S1, S2, S3, and S4 states defined by ACPI (Advanced Configuration and Power Interface) or ACPI. A state corresponding to any one of S1, S2, S3, and S4 defined.

Hereinafter, of the two control devices 5, the information of the

devices

2 and 3 is acquired and stored, and the device that controls the

devices

2 and 3 is referred to as the drive system control device 5, and the standby control device 5 is the one in the standby state. That's it. The drive system control device 5 is a first control device and a control device, and the standby system control device 5 is a second control device and another control device. In the first embodiment, the standby system control device 5 is configured such that when the drive system control device 5 is powered off, at the time of resetting the drive system control device 5 to the initial state, at the time of failure of the drive system control device 5, the drive system control device 5. At the time of an error for interrupting or stopping the process, or when a signal indicating a switching request from the computer 6 is received, the drive system control device 5 is switched. When the standby system control device 5 is switched to the drive system control device 5, the standby system control device 5 acquires and stores information on the

devices

2 and 3 and stores the

devices

2 and 3 in place of what has been operated as the drive system control device 5 until now. Control. The drive system control device 5 is reset when the power is turned off, after being reset, when recovered from a failure, when recovered from an error, or when a signal indicating a switching request from the computer 6 is received. Switch to standby state.

In the following description, in the two control devices 5, the drive system control device 5 is described as a drive system control device 5 </ b> D, and the standby system control device 5 is described as a standby system control device 5 </ b> W. When the drive system control device 5 and the standby system control device 5 cannot be distinguished, they are simply referred to as the control device 5. Further, in each component of the control device 5, the reference numeral of the component that can be identified as that of the drive system controller 5D is given “D”, and the symbol of the component that can be identified as that of the standby controller 5W. Append "W". Furthermore, information acquired from the

devices

2 and 3 and stored in the external storage medium 100 is referred to as collected data.

In Embodiment 1, since the two control devices 5 have the same configuration, the same parts will be described with the same reference numerals. As shown in FIG. 1, the control device 5 includes a memory 10 that temporarily stores collected data and a data collection unit 20 that collects collected data. The control device 5 includes a communication unit 30 that can bidirectionally communicate with another control device 5 and the computer 6 via the network N, and an external storage medium storage unit 40 that is a storage unit that stores collected data in the external storage medium 100. And an external storage medium management unit 50 that manages the external storage medium 100.

The memory 10 is a storage medium having a storage area in which information that can be read by the computer 6 can be stored. When the memory 10 is the drive system control device 5D, the user data memory 11 that stores the collected data and the buffer memory 12 that temporarily stores the collected data stored in the user data memory 11 by the data collecting unit 20 With. The user data memory 11 executes the overwrite mode or stops storage when the amount of collected data received from the drive system control device 5D when it is the standby system control device 5W is larger than the free capacity of the external storage medium 100 Information indicating whether to execute the mode is stored.

The free capacity of the external storage medium 100 is the capacity of a free storage area that does not store information. The overwrite mode is a mode in which the received collected data is overwritten on a storage area in the external storage medium 100 in which information is already stored. The storage stop mode is a mode for stopping storage of received collected data.

When the user data memory 11 receives information indicating that the free capacity of the external storage medium 100 of the drive system control device 5D has increased when it is the standby system control device 5W, the user data memory 11 executes the continue mode or returns data. Information indicating whether to execute the mode is stored. The continue mode is a mode for continuing to store the collected data received from the drive system control device 5D in the external storage medium 100W. In the data return mode, the collected data received from the drive system control device 5D and the collected data stored in the external storage medium 100W are collectively transmitted to the drive system control device 5D, and storage of the subsequent collected data is stored in the drive system control device. In this mode, 5D is executed.

The user data memory 11 executes the external storage medium storage mode for storing the collected data in the external storage medium 100D or the transmission mode for transmitting the collected data to the standby system control device 5W when it is the drive system control device 5D. The information which shows is memorize | stored.

The storage area of the user data memory 11 includes a storage area for storing collected data, a storage area for storing information indicating whether the overwrite mode is executed or the storage stop mode is executed, and the continuation mode is executed or the data return mode. And a storage area for storing information indicating whether the external storage medium storage mode is executed or the transmission mode is executed. The buffer memory 12 temporarily stores the collected data written in the user data memory 11 when it is the drive system control device 5D. The buffer memory 12 temporarily stores information received from the drive system control device 5D when it is the standby system control device 5W.

The data collection unit 20 is a data creation unit 21 that creates collection data to be stored in the external storage medium 100, and a drive that is a first storage destination switching unit that determines a storage destination of information when the drive system control device 5D is used. A system collection control unit 22. The data collection unit 20 includes a standby system collection control unit 23 that is a second storage destination switching unit that determines a storage destination of information when the standby system control device 5W is used.

The external storage medium storage unit 40 is detachable from the external storage medium 100, and stores the information created by the data creation unit 21 in the attached external storage medium 100. In the first embodiment, the external storage medium 100 is composed of an SD memory card (Secure Digital memory card) or SRAM (Static Random Access Memory) cassette, but is not limited to an SD memory card or RAM cassette, and is magnetic. A disc, an optical disc, or a magneto-optical disc may be used. In the first embodiment, the external storage medium 100W attached to the external storage medium storage unit 40W of the standby control device 5W is the second storage device that is detachably attached to the storage medium of the second control device and the second control device. It is a storage medium.

The external storage medium management unit 50 includes an access unit 51 having a function of enabling storage of collected data to the external storage medium 100 attached to the external storage medium storage unit 40 and reading of the collected data, and external storage medium storage A capacity management unit 52 having a function of holding information on the capacity of the storage area stored in the external storage medium 100 attached to the unit 40 and information on free space.

FIG. 3 is a diagram illustrating a hardware configuration of the control device of the control system according to the first embodiment. As shown in FIG. 3, the control device 5 includes a CPU unit 5A for processing and executing a control program, and an I / O (Input / Output) unit 5B connected to the

devices

2 and 3. In the first embodiment, two I / O units 5B are provided and connected to one of the

devices

2 and 3, respectively. The I / O unit 5B includes at least a circuit board 5B1, and an MPU (Micro Processing Unit) (not shown) that is mounted on the circuit board 5B1 and stores and executes a computer program.

The CPU unit 5A includes a circuit board 5A1, an MPU 5A2 that is mounted on the circuit board 5A1 and executes a control program, and a memory 5A3 that is connected to the MPU 5A2 via the internal bus B1. The CPU unit 5A includes a communication interface 5A4 that communicates with the computer 6 and another control device 5, a bus interface 5A5 connected to the I / O unit 5B, a storage unit 5A6 that stores a control program, and an external storage medium 100. An external storage medium storage device 5A7 for storing the collected data. The MPU 5A2, the memory 5A3, the communication interface 5A4, the bus interface 5A5, the storage unit 5A6, and the external storage medium storage device 5A7 are connected via the internal bus B1.

The bus interface 5A5 is a bus bridge circuit that connects the internal bus B1 and the expansion bus B2. The bus interface 5A5 is connected to the I / O unit 5B via the expansion bus B2. The storage unit 5A6 stores the control program received from the computer 6. In Embodiment 1, the storage unit 5A6 is an SSD or an HDD, but is not limited to an SSD or an HDD.

External storage medium 100 is detachable from external storage medium storage device 5A7. The external storage medium storage device 5A7 can store information in the external storage medium 100 and can read information stored in the external storage medium 100.

The functions of the data creation unit 21, the drive system collection control unit 22, the standby system collection control unit 23, the access unit 51 of the external storage medium management unit 50, and the capacity management unit 52 of the data collection unit 20 are stored in the storage unit 5A6 by the MPU 5A2. This is realized by reading and executing the stored control program. The control program is realized by software, firmware, or a combination of software and firmware. The function of the communication unit 30 of the control device 5 is realized by the communication interface 5A4. The function of the external storage medium storage unit 40 is realized by the external storage medium storage device 5A7 capable of storing information in the external storage medium 100. The functions of the user data memory 11 and the buffer memory 12 of the memory 10 are realized by the memory 5A3. In the first embodiment, the memory 5A3 is configured by a nonvolatile semiconductor memory or a volatile semiconductor memory. As the nonvolatile semiconductor memory or volatile semiconductor memory, RAM, ROM, flash memory, EPROM (Erasable Programmable Read Only Memory), or EEPROM (Electrically Erasable Programmable Read Only Memory) can be used. The memory 10 may be configured by at least one of a magnetic disk, an optical disk, and a magneto-optical disk.

Next, an example of the operation of the control system according to the first embodiment will be described with reference to the drawings. FIG. 4 is a flowchart showing an example of the operation of the drive system controller of the control system according to the first embodiment. FIG. 5 is a flowchart illustrating an example of part of the operation of the standby control device of the control system according to the first embodiment.

In the control system 1, one of the two control devices 5 operates as the drive system control device 5D, and the other is the standby system control device 5W. The drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D stores the collected data, which is information acquired from the

devices

2 and 3, in the user data memory 11D of the memory 10D. In addition, the computer 6 generates a computer program stored in the ROM 63 or a command for storing the collected data in the external storage medium 100D in the drive system control device 5D when the user operates the input device 65. The data creation unit 21D of the data collection unit 20D of the drive system control device 5D receives an instruction to store the collected data from the computer 6 in the external storage medium 100D via the network N and the communication unit 30D (step ST1).

The data creation unit 21D of the data collection unit 20D of the drive system control device 5D acquires the collection data stored in the user data memory 11D of the memory 10D and stores it in the buffer memory 12D (step ST2). The storage area for storing the collected data of the user data memory 11D is cleared when the collected data is acquired by the data creating unit 21D of the data collecting unit 20D of the drive system control device 5D, and is in an empty state where no information is stored. It becomes.

The drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D refers to the information stored in the storage area of the user data memory 11D of the memory 10D, and the storage destination of the collected data is the drive system control device 5D. It is determined whether or not to execute the external storage medium storage mode set in the external storage medium 100D attached to the external storage medium storage unit 40D (step ST3). When the drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D determines that the external storage medium storage mode is to be executed (step ST3: Yes), the external storage medium management unit 50D externally transmits the capacity management unit 52D. Information on the free capacity of the storage medium 100D is acquired (step ST4).

The drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D determines whether or not the amount of collected data is smaller than the free capacity of the external storage medium 100D (step ST5). When the drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D determines that the amount of collected data is smaller than the free capacity of the external storage medium 100D (step ST5: Yes), the access system 51D passes through the access unit 51D. Then, the collected data stored in the buffer memory 12D is stored in a free area of the external storage medium 100D (step ST6). The storage area of the buffer memory 12D is cleared when the collected data is acquired by the drive system collection control unit 22D, and becomes an empty state where no information is stored.

The drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D has a collected data amount that is not smaller than the free space of the external storage medium 100D, that is, the collected data amount is free space of the external storage medium 100D. If it determines with it being above (step ST5: No), the transmission mode which sets the memory | storage destination of collection data to the standby type control apparatus 5W will be performed (step ST7). The drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D stores information indicating that the transmission mode is executed in the storage area of the user data memory 11D.

The drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D determines that the external storage medium storage mode is not executed (step ST3: No), or sets the storage destination of the collected data as a standby system control device. After setting to 5W (step ST7), the collected data stored in the buffer memory 12 is transmitted to the standby control device 5W via the communication unit 30D (step ST8). As described above, when the drive system collection control unit 22D determines that the amount of collected data before being stored in the external storage medium 100D is equal to or larger than the free capacity of the external storage medium 100D (step ST5: No), By setting the storage destination in the standby system control device 5W (step ST7), the collected data storage destination is changed from the external storage medium 100D to the standby system control device before the amount of collected data exceeds the free capacity of the external storage medium 100D. Switch to 5W external storage medium 100W. In the first embodiment, the drive system collection control unit 22D that is the first storage destination switching unit is provided in the drive system control device 5D that is the first control device.

Further, when the control system 1 includes two or more second control devices 5 connected to the drive system control device 5D, the drive system collection control unit 22D determines that the amount of collected data is the free capacity of the external storage medium 100D. Before exceeding, the storage destination of the collected data may be switched from the external storage medium 100D to any one of the external storage media 100W of the second control device 5.

The communication unit 30W of the standby system control device 5W receives the collected data from the drive system control device 5D (step ST10). The standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W acquires information on the free capacity of the buffer memory 12W of the memory 10W of the standby system control device 5W. Standby system collection control unit 23W of data collection unit 20W of standby system control device 5W determines whether or not the free capacity of buffer memory 12W of memory 10W of standby system control device 5W is smaller than the amount of collected data received. (Step ST11).

The standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W determines that the free capacity of the buffer memory 12W of the memory 10W of the standby system control device 5W is not smaller than the amount of collected data received ( In step ST11: No), the data creation unit 21W of the data collection unit 20W of the standby control device 5W stores the received collection data in the buffer memory 12W (step ST12). Note that the free capacity of the buffer memory 12W of the memory 10W of the standby control device 5W is not smaller than the amount of collected data received, that the free capacity of the buffer memory 12W of the memory 10W of the standby control device 5W is received. That is more than the amount of data.

Standby system collection control unit 23W of data collection unit 20W of standby system control device 5W determines that the free capacity of buffer memory 12W of memory 10W of standby system control device 5W is smaller than the amount of collected data received (step) ST11: Yes) and the information stored in the buffer memory 12W is temporarily stored in the external storage medium 100W via the access unit 51W of the external storage medium management unit 50W. The standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W temporarily clears the storage area of the buffer memory 12W to make it an empty state in which information is not stored, and then stores the received collection data in the buffer memory It is stored in 12W (step ST13). The standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W clears the collected data temporarily stored in the external storage medium 100W after storing the received collection data in the buffer memory 12W.

The standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W stores the received collection data in the buffer memory 12W (step ST12 and step ST13), and then the capacity management unit 52W of the external storage medium management unit 50W. The information on the free space of the external storage medium 100W is acquired from (step ST14).

Standby system collection control unit 23W of data collection unit 20W of standby system control device 5W determines whether or not the free capacity of external storage medium 100W is equal to or greater than the amount of collected data stored in buffer memory 12W (step ST15). When the standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W determines that the free space of the external storage medium 100W is equal to or larger than the amount of collected data stored in the buffer memory 12W (step ST15: Yes). The collected data stored in the buffer memory 12W via the access unit 51W is stored in a free area of the external storage medium 100W (step ST16).

When the standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W determines that the free capacity of the external storage medium 100W is not greater than or equal to the amount of collected data stored in the buffer memory 12W (step ST15: No). Referring to the storage area of the user data memory 11 of the memory 10, it is determined whether or not information indicating the overwrite mode is stored (step ST17). That the free capacity of the external storage medium 100W is not equal to or greater than the amount of collected data stored in the buffer memory 12W is that the amount of collected data exceeds the free capacity of the external storage medium 100W. When the standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W determines that information indicating the overwrite mode is stored (step ST17: Yes), the standby system control unit 23W stores the information in the buffer memory 12W via the access unit 51W. The stored data that has been stored is overwritten on the storage area of the external storage medium 100W that already stores the information (step ST18). If the standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W determines that the information indicating the overwrite mode is not stored (step ST17: No), the storage of the collected data is stopped (step ST19). ).

The external storage medium 100D attached to the external storage medium storage unit 40D of the drive system control device 5D by the user while the drive system control device 5D sets the storage destination of the collected data to the standby system control device 5W. May be removed. Thereafter, the user copies the collected data stored in the removed external storage medium 100D to another storage medium, and then clears the storage area of the external storage medium 100D to increase the free capacity. Alternatively, the user prepares a new external storage medium 100D. The user attaches the external storage medium 100D to the external storage medium storage unit 40D of the drive system control device 5D again. Then, the capacity management unit 52D of the drive system control device 5D detects that the free capacity of the external storage medium 100D has increased, and the drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D receives the communication unit 30D. Then, information indicating that the free space of the external storage medium 100D has increased is transmitted to the standby control device 5W.

The standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W stores the collected data in the external storage medium 100W (step ST16), and then overwrites the collected data in the external storage medium 100W (step ST18). Alternatively, after the storage of the collected data is stopped (step ST19), it is determined whether or not the communication unit 30W has received information indicating that the free space of the external storage medium 100D has increased (step ST20). Standby system collection control unit 23W of data collection unit 20W of standby system control device 5W determines that communication unit 30W has not received information indicating that the free capacity of external storage medium 100D has increased (step ST20: No). ) And the process returns to step ST10 to continue storing the collected data in the external storage medium 100W from the drive system controller 5D.

When the standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W determines that the communication unit 30W has received information indicating that the free capacity of the external storage medium 100D has increased (step ST20: Yes). Reference is made to the storage area of the user data memory 11W. The standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W determines whether or not to execute the data return mode for changing the storage destination (step ST21). When the standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W determines that the data return mode for changing the storage destination is not executed (step ST21: No), the process returns to step ST10, and the drive system control device The storage of the collected data received from 5D in the external storage medium 100W is continued.

When the standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W determines to execute the data return mode for changing the storage destination of the received collection data (step ST21: Yes), the standby system control unit 23W stores the data in the external storage medium 100W. The stored collected data is transmitted to the drive system controller 5D via the communication unit 30W (step ST22).

The data creation unit 21D of the data collection unit 20D of the drive system control device 5D that has received the collection data transmitted from the standby system control device 5W stores the collection data stored in the user data memory 11D in the buffer memory 12D. The received collected data is stored in the buffer memory 12D. The drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D integrates the collected data stored in the buffer memory 12D. The drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D stores the integrated collection data in the external storage medium 100D and stores information for executing the external storage medium storage mode in the storage area of the user data memory 11D. Remember.

Thereafter, the drive system collection control unit 22D of the data collection unit 20D of the drive system control device 5D stores the collected data in the external storage medium 100D according to the flowchart shown in FIG. As described above, the standby system collection control unit 23W determines that the free space of the external storage medium 100D has increased (step ST20: Yes), and determines to change the storage destination of the collected data to the external storage medium 100D (step ST21). :)) After the free capacity of the external storage medium 100D increases, the storage destination of the collected data is switched from the external storage medium 100W of the standby control device 5W to the external storage medium 100D. In the first embodiment, the standby system collection control unit 23W that is the second storage destination switching unit is provided in the standby system control device 5W that is the second control device.

When the control system 1 includes two or more second control devices 5 connected to the drive system control device 5D, the standby system collection control unit 23W stores the collected data after the free space of the external storage medium 100D increases. The storage destination may be switched from any external storage medium 100W of the second control device 5 to the external storage medium 100D.

According to the control system 1 and the control device 5 according to the first embodiment, before the amount of collected data before storing in the external storage medium 100D exceeds the free capacity of the external storage medium 100D, the storage destination of the collected data is set to the external A drive system collection control unit 22D that switches from the storage medium 100D to the external storage medium 100W of the standby system control device 5W is provided. For this reason, the control system 1 and the control device 5 can store the collected data in either of the

external storage media

100D and 100W, and can acquire the collected data continuous in time series. As a result, the control system 1 and the control device 5 do not need to re-acquire the collected data, and can suppress deterioration in work efficiency.

Further, according to the control system 1 and the control device 5 according to the first embodiment, since the collected data is stored in either the

external storage medium

100D or 100W, the capacity of the memory 10 built in the control device 5 needs to be increased. There is no. As a result, according to the control system 1 and the control device 5, it is not necessary to add a memory to the control device 5, and an increase in the manufacturing cost of the control device 5 can be suppressed.

According to the control system 1 and the control device 5 according to the first embodiment, after the free space of the external storage medium 100D increases, the standby system collection control for switching the storage destination of the collected data from the external storage medium 100W to the external storage medium 100D Part 23W. When the storage destination of the collected data is switched, the standby system collection control unit 23W transmits the collected data stored in the external storage medium 100W to the drive system control device 5D. As a result, the control system 1 and the control device 5 can integrate the collected data, and can acquire the collected data continuous in time series.

Further, the control system 1 and the control device 5 according to the first embodiment are connected to the drive system control device 5D and made redundant when the free capacity of the external storage medium 100D of the drive system control device 5D decreases. The external storage medium 100W that is the storage medium of the device 5W stores the collected data. For this reason, the control system 1 and the control device 5 according to the first embodiment can collect the collected data in a time series, and can prevent the collected collected data from being lost.

Embodiment 2. FIG.
Next, the control system 1 and the control apparatus 5 which concern on Embodiment 2 of this invention are demonstrated based on drawing. FIG. 6 is a diagram illustrating a configuration of a control system according to the second embodiment. FIG. 7 is a flowchart showing an example of part of the operation of the standby control device of the control system according to the second embodiment. In FIG.6 and FIG.7, the same code | symbol is attached | subjected to the same part as Embodiment 1, and description is abbreviate | omitted.

In the second embodiment, the configuration of each control device 5 of the control system 1, that is, the drive system control device 5D and the standby system control device 5W is the same as that of the first embodiment as shown in FIG. When the capacity management unit 52D detects that the free space of the external storage medium 100D has increased while the drive system collection control unit 22D is executing the transmission mode, the standby system collection control unit 23D determines that the free space of the external storage medium 100D is free. Instead of the information indicating the increase, an instruction to switch the storage destination of the collected data from the external storage medium 100W to the external storage medium 100D is transmitted to the standby control device 5W. The standby system collection control unit 23D stores information for executing the external storage medium storage mode in the storage area of the memory 10D. The drive system control device 5D gives an instruction to the standby system control device 5W to switch the storage destination of the collected data from the external storage medium 100W to the external storage medium 100D instead of the information indicating that the free space of the external storage medium 100D has increased. The operation is the same as in the first embodiment except for transmitting.

As shown in FIG. 7, the standby system collection control unit 23W of the data collection unit 20W of the standby system control device 5W stores the collected data in the external storage medium 100W (step ST16), and then stores the collected data in the external storage medium 100W. Whether the communication unit 30W has received an instruction to switch the storage destination of the collected data from the external storage medium 100W to the external storage medium 100D after overwriting (step ST18) or after stopping collection data collection (step ST19) Is determined (step ST21-2). Standby system collection control unit 23W of data collection unit 20W of standby system control device 5W determines that communication unit 30W has not received an instruction to switch the storage destination of the collected data from external storage medium 100W to external storage medium 100D ( Step ST21-2: No), the process returns to step ST10 to continue storing the collected data received from the drive system control device 5D in the external storage medium 100W.

Standby system collection control unit 23W of data collection unit 20W of standby system control device 5W determines that communication unit 30W has received an instruction to switch the storage destination of the collected data from external storage medium 100W to external storage medium 100D (step ST21). -2: Yes), the collected data stored in the external storage medium 100W is transmitted to the drive system controller 5D via the communication unit 30W (step ST22). Standby system control device 5W operates in the same manner as in the first embodiment except that communication unit 30W determines whether or not it has received an instruction to switch the storage destination of collected data from external storage medium 100W to external storage medium 100D. To do.

In the second embodiment, the standby system collection control unit 23D of the data collection unit 20D of the drive system control device 5D detects that the free capacity of the external storage medium 100D has increased while the capacity management unit 52D is executing the transmission mode. Then, an instruction to switch the storage destination of the collected data from the external storage medium 100W to the external storage medium 100D is transmitted to the standby control device 5W, so that the free space of the external storage medium 100D increases, and then the storage destination of the collected data is changed. Switching from the external storage medium 100W of the standby control device 5W to the external storage medium 100D. In the second embodiment, the standby system collection control unit 23D that is the second storage destination switching unit is provided in the drive system control device 5D that is the first control device.

According to the control system 1 and the control device 5 according to the second embodiment, as in the first embodiment, before the amount of collected data before storing in the external storage medium 100D exceeds the free capacity of the external storage medium 100D. The drive data collection control unit 22D switches the storage destination of the collected data from the external storage medium 100D to the external storage medium 100W of the standby control device 5W. For this reason, the control system 1 and the control apparatus 5 can acquire the collection data which continued in time series, and can suppress that work efficiency deteriorates.

Further, according to the control system 1 and the control device 5 according to the second embodiment, since the collected data is stored in either the

external storage medium

100D or 100W, there is no need to add a memory to the control device 5, and the control device It can suppress that the manufacturing cost of 5 increases.

According to the control system 1 and the control device 5 according to the second embodiment, after the free capacity of the external storage medium 100D increases, the standby system collection control for switching the storage destination of the collected data from the external storage medium 100W to the external storage medium 100D. The drive system controller 5D includes the unit 23D. As a result, the control system 1 and the control device 5 can integrate the collected data, and can acquire the collected data continuous in time series.

Embodiment 3 FIG.
Next, the control system 1 and the control apparatus 5 which concern on Embodiment 3 of this invention are demonstrated based on drawing. FIG. 8 is a diagram illustrating a configuration of a control system according to the third embodiment. FIG. 9 is a diagram illustrating a hardware configuration of a control device of the control system according to the third embodiment. 8 and 9, the same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the third embodiment, the standby control device 5W of the control system 1 includes an internal storage medium management unit 50-3 instead of the external storage medium management unit 50W, as shown in FIGS. In the third embodiment, the standby control device 5W of the control system 1 includes an internal storage medium storage unit 40-3 as storage means instead of the external storage medium storage unit 40W, and further includes an internal storage medium 200. The configuration is the same as that of the first embodiment.

The internal storage medium storage unit 40-3 stores the information created by the data creation unit 21W in the internal storage medium 200 built in the standby control device 5W. The function of the internal storage medium storage unit 40-3 is realized by the internal storage medium storage device 5A7-3 shown in FIG. 9 capable of storing information in the internal storage medium 200.

The internal storage medium 200 is a storage medium that is built in the standby control device 5W and that can store and read information that can be read by a computer. In the third embodiment, the internal storage medium 200 is configured by an SSD or an HDD, but is not limited to an SSD or an HDD, and may be configured by a nonvolatile semiconductor memory or a volatile semiconductor memory. As a nonvolatile semiconductor memory or a volatile semiconductor memory, a RAM, a ROM, a flash memory, an EPROM, or an EEPROM can be used. The internal storage medium 200 may be configured by at least one of a magnetic disk, an optical disk, and a magneto-optical disk.

The internal storage medium management unit 50-3 includes an access unit 51-3 having a function of enabling information to be stored in and read from the internal storage medium 200, and information on the capacity of the stored storage area of the internal storage medium 200. And a capacity management unit 52-3 having a function of holding information on free capacity. The functions of the access unit 51-3 and the capacity management unit 52-3 of the internal storage medium management unit 50-3 are realized by the MPU 5A2 shown in FIG. 9 reading out and executing the control program stored in the storage unit 5A6. . The control program is realized by software, firmware, or a combination of software and firmware.

In the third embodiment, the standby system control device 5W operates in the same manner as in the first embodiment except that the collected data received from the drive system control device 5D is stored in the internal storage medium 200. In the third embodiment, the internal storage medium 200 is a storage medium of the second control device.

According to the control system 1 and the control device 5 according to the third embodiment, as in the first embodiment, before the amount of collected data before storing in the external storage medium 100D exceeds the free capacity of the external storage medium 100D. The drive system collection control unit 22D switches the storage destination of the collected data from the external storage medium 100D to the internal storage medium 200 of the standby system control device 5W. For this reason, the control system 1 and the control apparatus 5 can acquire the collection data which continued in time series, and can suppress that work efficiency deteriorates.

The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1 control system, 2, 3 equipment, 5D drive system control device (first control device, control device), 5W standby system control device (second control device, other control device), 22D drive system collection control unit ( First storage destination switching unit), 23D, 23W Standby system collection control unit (second storage destination switching unit), 40 External storage medium storage unit (storage unit), 40-3 Internal storage medium storage unit (storage unit) , 100D external storage medium, 100W external storage medium (storage medium, second external storage medium), 200 internal storage medium (storage medium).

Claims

A control system comprising: a first control device having storage means for storing information acquired from a device in a removable external storage medium; and a second control device connected to one or more of the first control devices. Because
The first storage medium is switched from the external storage medium to the storage medium of the second controller before the amount of information before storing in the external storage medium exceeds the free capacity of the external storage medium. A storage destination switching unit;
A second storage destination switching unit that switches the storage destination of the information from the storage medium of the second control device to the external storage medium after the free space of the external storage medium increases;
A control system comprising:
2. The control system according to claim 1, wherein the storage medium of the second control device is a second external storage medium that is detachably attached to the second control device.
2. The control system according to claim 1, wherein the storage medium of the second control device is an internal storage medium built in the second control device.
The control system according to any one of claims 1 to 3, wherein the second storage destination switching unit is provided in the first control device.
The control system according to any one of claims 1 to 3, wherein the second storage destination switching unit is provided in the second control device.
A control device that is connected to another control device and stores information acquired from the device in a removable external storage medium,
Storage means for storing the information acquired from the device in the external storage medium;
First storage for switching the storage destination of the information from the external storage medium to the storage medium of the other control device before the amount of information before storing in the external storage medium exceeds the free capacity of the external storage medium A destination switching unit;
A second storage destination switching unit that switches the storage destination of the information from the storage medium of the other control device to the external storage medium after the free space of the external storage medium increases;
A control device comprising: