Redundant automation system for technical device management, and also operating procedure of similar type of automation system

FIELD: automation.

SUBSTANCE: particular group of inventions relates to redundant system and automation method for technical device management. Technical result is achieved by that in redundant system of automation, and also in operating procedure of such automation system there are provided two automation instruments, which are outfitted by common memory block, where there are stored automation tool condition data, herewith memory block is implemented in the form of "Reflective Memories". Hereby, automation instruments allows immediate access to common database, and in case of failure of main automation instrument it takes place smooth shifting to standby automation instrument.

EFFECT: increase in automation system productivity.

10 cl, 1 dwg

 

The invention relates to a redundant automation system for controlling a technical device and method for operation of this type of automation system, and there are at least two device automation. The first of these automation systems operate as the master device automation, and the second from automation devices operate as a backup device automation.

The constant readiness of devices and systems in the case of technical devices, in particular power plants, is one of the most important requirements. For reasons of reliability to avoid possible violation and the reasons for the reliable supply of electric energy, or materials shall be excluded the failure of the automation systems and the associated simple important technical devices.

To solve this problem, the prior art so-called system automation high availability, for example SIMATIC S-7 H (Siemens), in which almost all components, including cumulative units and power supply units are available with this redundancy, in case of failure of the automation device without interruption to switch to another, identically performed, the instrument automation. The automation devices with relatively comply with the Oia their teams synchronized relative to each other so that both devices automation can be processed completely in parallel in time the same data and run the same commands. Thus, it is possible that operated this way the backup device automation assumes the function of a defective main instrument automation.

A similar system automation high availability is still virtually created solely on the basis of the so-called controls with programmable memory (SPS), are, in their application difficult and when you purchase very expensive.

Therefore, the basis of the invention lies in the task of creating an automation system of the above type, which is more easily performed and which can be widely used, in particular, the standard components of the equipment of personal computers.

Regarding the automation task is solved by means of redundant automation systems for managing the technical device with the features of independent claim 1 of the claims.

The invention thus proceeds from the consideration that one of the most important preconditions for implementation of redundant automation systems should be seen in the provision of relevant database, which describes the state of technical devices and automation systems. Switching from the main device of the and automation to the backup device automation without noticeable latency is achievable only when there are two devices of automation to the time of occurrence of the fault are the same current data so that the switchover to the backup device may immediately and without "jumps"data.

In the prior art (systems) controls with programmable memory high availability is solved due to the fact that both devices automation made identical and, accordingly, contain, each, storage unit, in which due to the above-described synchronous command processing write the same data and read the same data.

In contrast, the present invention provides that although there are two devices of automation, however, for them there is only one total cumulative unit both units automation have write access and read. Thus, the implementation cost compared with the prior art are significantly reduced, because, first, it is necessary only one cumulative unit and, secondly, falling away from this necessary expenses for synchronization between multiple cumulative blocks of automation systems.

Beyond compare, most failures of automation devices due to faulty work, for example, maps the input or output, power supply units or Central Ave is cessaro automation devices; from this point of view, the present invention offers a cost-effective, simplified solution for most to be overcome in practice associated with redundancy problems of automation.

Although there have been some automation solutions on the basis of personal computers, still they do not yet provide a smooth switchover to the backup device automation, as necessary synchronizing databases that have access automation devices, cannot occur with known means with the necessary speed. Smooth switching means that switches from main to Stand-by) device automation is virtually no impact on the input and output signals of the automation system so that, in particular, the regulation can continue exactly from the place where the defective device automation interrupted regulation. Backup automation system, therefore, at the time of signal acquisition regulation shall be made available to the so-called initial values that relate to the past of the regulatory process (covering in particular, the regulation algorithms that contain integral and/or differential component).

The present invention solves the problem updates enoi database for devices of automation due to the fact, that there is only one total cumulative block.

The decision to implement such a cumulative block in the technique of personal computers in the case corresponding to the invention of the automation system contains, for example, the use of so-called modules "mirror memory" ("Reflective Memories"), which are available in the form purchased by commercial blocks of personal computers.

Due to this, personal computers, workstations, or embedded computer systems" ("Embedded-Systems (in particular, with different operating systems) are in the state's ability to access a shared database in near real time.

In the local computing machine module mirror memory is, for example, in the address space of the shared memory, each participating computer network. Then the data with any level of automation, in particular also custom software can be written directly into the memory and read from this memory area. The data that the local computing machine records in this module "mirror memory", in parallel and without time delay are automatically available to all other local computers.

Due to special-the first execution module mirror memory occur during transportation of data between computers does not affect the normal performance of this computing machine.

In a preferred form of execution of the invention, a control module, through which you can control the mode of operation of the home automation system and in case of failure of the switch main unit automation on the backup device automation, which then assumes the function of the former main instrument automation.

In this form of execution control operation of the device, including recognition errors. For example, the monitoring module covers the evaluation of the so-called sign of life of the main unit automation, and, for example, during each cycle of control change of the characteristic parameter, if the main unit of the system is workable. If this characteristic parameter in one cycle does not change, then this is a symptom of this main unit automation and control module makes the process of switching to the appropriate backup device automation.

Possible faults that prevent change called the characteristic parameter, include, for example, malfunction of hardware and/or operating system errors and/or failures of the custom software.

In the following preferred forms of the implementation of the invention in a shared memory area data available conditions which describe the actual working condition of the device and automation system immediately before the time of failure of the main unit automation.

Due to this, it is possible that the backup device can immediately take over the function of the main unit automation, since all necessary data pending in shared memory and can be read back device automation without delay time.

State data must contain, in particular, such data, which correspond to the initial values of the regulation algorithms so that through these initial values back to the device automation is also known the history of the relevant regulation and possible to continuously carry out further steps of the regulation backup device automation.

In addition, these States contain input and output data technical devices that are registered by the automation system and/or are issued on a technical device. Collectively, these data indicated as the mapping process.

Particularly preferably smooth switching occurs thus, if at least part of the available shared memory data as the current presentation of the surveillance state technical devices and systems automation is handled directly on the backup device automation.

While switching between the main device automation and backup device automation is virtually no delay when the continuous continuation of the maintenance management device via the backup device automation.

The invention further leads to the method of operating a redundant automation system for controlling a technical device with the features of independent claim 5 of the claims.

A preferred form of carrying out of the invention of the method are reflected in the respective dependent claims.

Subsequently in greater detail one exemplary embodiment of the invention.

At the same time he shows on the drawing corresponding to the invention a redundant automation system.

The drawing shows the corresponding invention a redundant automation system 1, which contains devices 3A, 3b automation. The first device 3A automation made in the form of the main unit automation, which takes control of the device. Signals from technical devices, as well as control commands to the technical device are processed in this field devices 17 and transmitted via bus 15 to devices 3A, 3b automation.

In case of failure of the first device 3A automates the tion available to the second device 3b automation which is made as a backup device 3b automation and can take over the control tasks of the first device 3A automation.

Recognition of fault and switching from the first device 3A automation on the second device 3b automation provides the control module 23. He assesses, among other things, a sign of life 25 the first device 3A automation and in case of failure of the switches on the second device 3b automation, which then takes over the control tasks of the former main unit 3A automation.

Devices 3A, 3b, automation, respectively, include a CPU 5A, 5b and, if necessary, the drive 6A, 6b. They are made preferably in the form of a personal computer in which the control task will query and display in the form of task 7a, 7b. Compared with normal controls with programmable memory these tasks 7a, 7b automation are significantly faster, so if you performed similarly automation systems based on personal computers is not synchronized teams, and task synchronization. Synchronizing the respective tasks 7a, 7b occurs by signal 11 interrupt.

In normal mode, if the first device 3A automation unmistakably functions as the main instrument automatize the AI, data from technical devices that are registered field devices 17 are introduced sequentially both devices 3A, 3b automation using at least one process 19 reading; issuing control commands and other impacts on the components of technical devices, however, is only main unit of automation by means of at least one process 21 entries.

After switching in case of failure on backup to this device automation of this process 21 record assumes the second device 3b automation; this is reflected in the drawing as a dashed connection of the second device 3b automation field bus 15.

When you synchronize tasks 7a, 7b automation by signal 11 interrupts before each task request is synchronization of timers, counters, process data and, if necessary, other internal and external data.

According to the invention both devices 3A, 3b automation corresponds to the cumulative unit 9, to which you have access both devices 3A, 3b automation. This storage unit is mainly stored data state devices 3A, 3b, automation, and cumulative block 9 contains at least one memory area, which allows read and write both devices 3A, 3b automation. Thisway, available, at least in this area of data memory in parallel available devices 3A, 3b automation. Since both devices 3A, 3b automation thereby have access to a shared database in the form of cumulative unit 9, to which they have access, in case of failure of the main unit automation should not be agreeing memory between devices 3A and 3b automation, at least, to reconcile the above-mentioned data States. Therefore, in case of fault, the switching from the main unit automation on the backup device 3b automation can happen very quickly and smoothly, and compared with the known redundant automation systems implementation costs reduced. Pending in the General area of cumulative memory unit 9, the data States of the devices 3A, 3b automation contain all the data that describe the current operational status of devices 3A, 3b automation as, for example, the current values of the signals transmitted from technical devices for automation systems (mapping process), the current values of the signals transmitted from the main device automation technical device, and commands, and, if necessary, the current initial value of the regulation algorithms that cover, at IU is e, one differentiating and/or integrating link control.

Knowledge of the current initial values to the time of failure of the main unit automation is important to still backup device automation can continuously conduct further appropriate regulation, in particular without jump regulated value.

Cumulative unit 9 is preferably in the form of a so-called module "mirror memory" ("Reflective Memory"), which exists in the form of a module for use in personal computers. Physically this module is preferably set in one of the devices 3A, 3b, automation, and data that is recorded in the module this device automation, then there are also at the disposal of all other automation devices.

In conclusion, the present invention can be described as follows:

in a redundant system (1) automation, according to the invention, and method for operating such a system (1) automation provides two device (3A, 3b) automation, which are equipped with a total cumulative unit in which the memorized data of the state apparatus (3A, 3b) automation. Thus devices (3A, 3b) automation have direct access to the shared database, and in case of failure of coordination memory when switching the backup device (3b) automation disappears.

1. Redundant system (1) automation for managing the technical device containing at least two devices (3A, 3b) automation, one of the automation devices made in the form of the main unit (3A) automation and other automation devices in the form of a backup device (3b) automation, and the corresponding at least two automation devices (3A, 3b) memory block (9), in which the memorized data of the state apparatus (3A, 3b) automation, and the memory unit (9) has a total area of memory that allows read and write at least two devices (3A, 3b) automation so that the current in this area of data memory are available to devices (3A, 3b) automation in parallel, characterized in that the memory unit (9) is made in the form of "mirror memory" ("Reflective Memories").

2. Redundant system (1) automation according to claim 1, characterized in that it is equipped with a control module (23), which is controlled by the operation mode of the main unit (3A) automation, and in case of failure of the main unit (3A) automation provides the ability to switch to the backup device (3b) automation, which then assumes the function of the former main unit (3A) automation.

3. Redundant system (1) automation according to claim 1 or 2, characterized in that Thu is in the shared memory area stores data, describing the current operational status of technical devices and systems (1) automation immediately before the time of failure of the main unit (3A) automation.

4. Redundant system (1) automation according to claim 2, characterized in that the switching occurs smoothly due to the fact that at least part of the data available in the shared memory area, continues to be directly processed by a backup device (3b) automation as display the current status of technical devices and systems (1) automation.

5. Redundant system (1) automation according to claim 3, characterized in that the switching occurs smoothly due to the fact that at least part of the data available in the shared memory area, continues to be directly processed by a backup device (3b) automation as display the current status of technical devices and systems (1) automation.

6. A method of operating a redundant system (1) automation for managing the technical device containing at least two devices (3A, 3b) automation, one of the automation devices is operated as a master device (3A) automation and other automation devices operated as a backup device (3b) automation, and the memory unit (9), sootvetstvuuschem, at least two automation devices (3A, 3b) are memorized data of the state apparatus (3A, 3b) automation, and the total memory area of the memory unit (9) may be filled and to read at least two devices (3A, 3b) automation so that the current in this area of data memory are available to devices (3A, 3b) automation in parallel, characterized in that the memory unit (9) is made in the form of "mirror memory" ("Reflective Memories").

7. The method according to claim 6, characterized in that control the operation of the main unit (3A) automation and in case of failure of the main unit (3A) automation switch to the backup device (3b) automation, which then assumes the function of the former main unit (3A) automation.

8. The method according to claim 6 or 7, characterized in that the total area of memory stores data describing the current operational status of technical devices and systems (1) automation immediately before the time of failure of the main unit (3A) automation.

9. The method according to claim 7, characterized in that the switching occurs smoothly due to the fact that at least part of the data available in the shared memory area, continues to be directly processed by a backup device (3b) automation as display the current status of the order the devices and systems (1) automation.

10. The method according to claim 8, characterized in that the switching occurs smoothly due to the fact that at least part of the data available in the shared memory area, continues to be directly processed by a backup device (3b) automation as display the current status of technical devices and systems (1) automation.



 

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18 cl, 3 dwg, 1 tbl

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