JP4797533B2 - Control system and control system parameter setting method - Google Patents

Description

  The present invention relates to a control system having a field device such as a transmitter and a flow meter and a field terminal such as a handheld terminal, and a parameter setting method for the control system, and more particularly, a highly reliable control system and a parameter setting method for the control system. About.

  Some conventional control systems include a field terminal (see, for example, Patent Document 1).

  FIG. 4 is a configuration diagram illustrating an example of a conventional control system.

  The field device 11 is installed at a predetermined site (field) and connected to the field network 12. In the field, parameter confirmation, monitoring, calibration, and adjustment are often performed on the field device 11 for the purpose of installation and maintenance.

  The field terminal (handheld terminal) 13 is configured to be portable, and is selectively connected to the field network 12 as necessary. The field terminal 13 has a parameter setting function as well as an information collecting function for obtaining information such as measured values and alarms from the field device 11, and performs parameter setting and adjustment of the field device 11. In this way, the field terminal 13 controls the field device 11.

  The host system 14 is installed at a predetermined location and connected to the field network 12. The host system 14 obtains information such as measured values and alarms from the field device 11 and performs parameter setting and adjustment of the field device 11. In this way, the host system 14 controls the field device 11.

  Communication between the host system 14 and the field terminal 13 is performed by HART communication, fieldbus communication, or the like.

The operation of the conventional example of FIG. 4 will be described.
First, the field device 11 generates various alarm information and transmits it to the host system 14 via the field network 12 (step S1).

  Based on the alarm information input from the field device 11, the worker carries the field terminal 13 and goes to the site. Then, the worker connects the field terminal 13 to the field network 12 at the site.

  Next, the worker uses the field terminal 13 at the site to perform parameter confirmation, monitoring, calibration, adjustment, and the like of the field device 11. That is, the worker controls the field device 11 using the field terminal 13 based on the alarm information from the field device 11 (step 5).

  When the worker finishes the control work on the field device 11, the worker disconnects the field terminal 13 from the field network 12.

JP 2002008176 A

  However, in the conventional example shown in FIG. 4, no measures are taken to prevent human error such as a worker. There is a problem that the field device 11 may be erroneously set due to human error. In particular, there is a problem that the field device 11 may be adjusted to an incorrect setting by the field terminal 13.

  Furthermore, there is a problem that a third party may illegally change the setting of the field device 11.

  An object of the present invention is to solve these problems, and to provide a highly reliable control system capable of suppressing human error and a parameter setting method for the control system.

The present invention which achieves such an object is as follows.
(1) A plurality of field devices connected to a field network, a portable field terminal that is selectively connected to the field network and controls the field device, and is connected to the field network and controls the field device. A host system connected to the host system and storing a list of unique identification information of each field terminal in advance. The host system includes setting authority request information input from the field terminal and the unique The field terminal is authenticated based on the identification information list, and setting authority transfer information is generated based on the authentication and alarm information input from the field device. The field device and the field terminal are A control system for performing parameter setting communication based on the setting authority transfer information.
(2) The field device includes a field database that stores a list of unique identification information of each field terminal in advance, the field terminal generates parameter setting information based on the setting authority transfer information, and the field device includes: The control system according to (1), wherein the field terminal is authenticated from the parameter setting information and a list of unique identification information of the field database.
(3) The control system according to (2), wherein the host system performs history management of the alarm information, the setting authority request information, and the setting authority transfer information.
(4) A plurality of field devices connected to the field network, a portable field terminal selectively connected to the field network and controlling the field device, and connected to the field network and controlling the field device. A parameter setting method for a control system including a host system, the step of storing a list of unique identification information of each field terminal in a host database in advance, and a setting authority request input from the field terminal by the host system Authenticating the field terminal based on the information and the list of unique identification information, and generating setting authority transfer information based on the authentication and alarm information input from the field device, the field device The field terminal and is, parameter setting method of the control system, characterized in that it comprises the step of performing communication parameter setting based on the setting authority transfer information.
(5) A plurality of field devices connected to the field network, a portable field terminal selectively connected to the field network and controlling the field device, and connected to the field network and controlling the field device. A parameter setting method for a control system comprising a host system, wherein a list of unique identification information of each field terminal is stored in a host database in advance, and a list of unique identification information of each field terminal is stored in advance in the field device Storing in the field database, the host system authenticates the field terminal based on the setting authority request information input from the field terminal and the unique identification information list; A step of generating setting authority transfer information based on alarm information input from the field device, a step of generating parameter setting information based on the setting authority transfer information by the field terminal, and the field device including the parameter setting information and the field. A parameter setting method for a control system, comprising: authenticating the field terminal from a list of unique identification information in a database.

The present invention has the following effects.
A highly reliable control system capable of suppressing human error and a parameter setting method for the control system can be provided. It can also protect against unauthorized access.

  Hereinafter, the present invention will be described in detail with reference to FIG. FIG. 1 is a block diagram showing an embodiment of the present invention. The same elements as those in the conventional example of FIG.

  The feature of the embodiment shown in FIG.

  The upper database 15 is formed of a non-volatile storage element such as an EEPROM or a Flash ROM, and is connected to the upper system 14. The host database 15 stores (registers) a list of unique identification information of each field terminal 13 in advance.

  The upper database 15 includes, for example, a list formed from an authority delegation flag, device ID information, tag information, and address information in advance. Here, the device ID is identification information inherently possessed by each field device 11 and each field terminal 13. The tag and address are identification information in the field network 12, and the device ID, tag, and address are unique. In the initial state, all delegation flags are blank.

Specifically, in the higher-level database 15, for example, device ID information “5945430003XXXXXX”, tag information “TTT1002”, and address information “0xF4” correspond to each other.
Further, the higher-level database 15 stores, for example, three types of information including information related to the device ID information “5945430003XXXXXXXXX”, information related to the device ID “5944540005XXXXXXX”, and information related to the device ID “5944540004XXXXXX”. ing.

  The field terminal (handheld terminal) 13 includes a setting authority function and a parameter setting function.

  The field terminal 13 performs parameter setting communication with the field device 11 when the setting authority function is valid. Also, parameter setting information for performing parameter setting and adjustment of the field device 11 is generated.

  When the setting authority function is disabled, parameter setting communication with the field device 11 is not performed, and parameter setting information is not generated.

  The operation of the embodiment of FIG. 1 will be described.

  First, the step of storing the unique identification information list of each field terminal 13 in the upper database 15 in advance is executed.

Next, step S1 in which the field device 11 generates alarm information is executed. This alarm information is transmitted to the host system 14 via the field network 12.
The alarm information includes device ID information, tag information, address information, and the like regarding the field device 11. Then, the field terminal 13 and the host system 14 identify which field device 11 has generated the alarm information based on the alarm information.

  Based on the alarm information input from the field device 11, the worker carries the field terminal 13 and goes to the site. Then, the worker connects the field terminal 13 to the field network 12 at the site.

  Next, the field terminal 13 executes step S2 for generating setting authority request information. This setting authority request information is transmitted to the host system 14 via the field network 12. The setting authority request information includes device ID information, tag information, address information, and the like regarding the field terminal 13.

  Next, the authentication step S3 by the host system 14 is executed. The host system 14 compares the setting authority request information from the field terminal 13 with the list in the upper database 15 and identifies the field terminal 13 that generated the setting authority request information. Specifically, the device ID information, tag information, and address information that match are checked. If there is no match, it is determined that invalid setting authority request information has been generated. In this way, the host system 14 authenticates the field terminal 13.

  When the host system 14 authenticates the field terminal 13 correctly, it sets the authority delegation flag “1” corresponding thereto. Specifically, for example, the field terminal 13 corresponding to the device ID information “5945430005XXXXXX”, the tag information “SETTING”, and the address information “0xFC” is authenticated, and the authority delegation flag “1” corresponding thereto is set. Set.

  Here, the authority delegation flag “1” is prevented from being duplicated. Specifically, when the authority delegation flag is already “1”, processing is performed so that a new authority delegation flag “1” is not generated.

  Further, based on this authentication and alarm information from the field device 11, step S4 for generating setting authority transfer information is executed. The setting authority transfer information is transmitted to the field terminal 13 via the field network 12. That is, the host system 14 delegates the authority to allow parameter setting to a specific field terminal 13 (checkout).

  Further, the field device 11 and the field terminal 13 execute step S5 for performing parameter setting communication based on the setting authority transfer information. Specifically, the field terminal 13 generates parameter setting information based on the setting authority transfer information. The parameter setting information is transmitted to the field device 11 that generated the alarm information via the field network 12.

  Thus, the field terminal 13 performs parameter confirmation, monitoring, calibration, and adjustment on the field device 11.

  When the control operation for the field device 11 is completed, the field terminal 13 executes Step S6 for notifying the higher system to the authority release. Thus, the field terminal 13 releases the authority based on the setting authority transfer information (check-in).

  Further, the upper system 14 blanks the flag of the corresponding upper database 15. Specifically, for example, the authority delegation flag “” corresponding to the device ID information “5945430005XXXXXXX”, the tag information “SETTING”, and the address information “0xFC” is set.

  Then, the worker disconnects the field terminal 13 from the field network 12.

  According to the embodiment of FIG. 1, unauthorized control of the field device 11 is suppressed, and the field device 11 is controlled only from a specific field terminal 13.

  Thus, the embodiment of FIG. 1 can provide a highly reliable control system. Specifically, the field terminal 13 cannot control the field device 11 unless it is registered in the upper database 15 in advance. Further, the field terminal 13 cannot control the field device 11 when there is no function for generating the setting authority request information.

  The field terminal 13 can only browse information such as measured values and alarms from the field device 11 even when the field device 11 cannot be controlled.

  In addition, since only the field terminal 13 that has received the setting authority transfer information can control the field device 11, the field terminal 13 is not redundantly accessed from a plurality of field terminals.

  Furthermore, the host system 14 analyzes the situation quickly when a problem occurs by managing history of alarm information, setting authority request information, the setting authority transfer information, or information such as checkout and checkin. As a result, a more reliable control system can be constructed.

  The operation of the embodiment of FIG. 1 will be described with reference to FIG. FIG. 2 is a flowchart showing the parameter setting method of the embodiment of FIG. 1, and the vertical axis (from top to bottom) shows the passage of time.

  Step S01 is a step of storing the unique identification information list of each field terminal 13 in the host database 15 in advance in the host system 14.

  Step S <b> 11 is a step in which the host system 14 searches for the field terminal 13 connected to the field network 12.

  Step S12 is a step in which the field terminal 13 participates (connects) to the field network 12.

  Step S <b> 13 is a step in which the field terminal 13 responds to the search of the host system 14.

  Step S14 is a step in which the field terminal 13 reads parameters of the field device 11 (Read).

  Step S <b> 16 is a step in which the field device 11 responds to reading from the field terminal 13.

  At this time, the field device 11 and the field terminal 13 cannot perform parameter setting (Write) communication.

  Step S21 is a step in which the field terminal 13 transmits the setting authority request information to the host system.

  Step S <b> 22 is an authentication step by the host system 14.

  Step S <b> 23 is a step in which the host system 14 transmits the setting authority transfer information to the field terminal 13. That is, the host system 14 delegates the parameter setting permission authority to the specific field terminal 13 (checkout).

  Step S <b> 24 is a step in which the field terminal 13 transmits parameter setting information to the field device 11. That is, this is a step in which the field terminal 13 performs parameter setting (Write).

  Step S26 is a step in which the field device 11 responds to the parameter setting information from the field terminal 13.

  Step S27 is a step in which the field terminal 13 notifies the host system 14 that the authority is released. That is, the field terminal 13 releases the authority by the setting authority transfer information (check-in).

  In this way, the embodiment of FIG. 1 performs parameter setting.

  FIG. 3 is a block diagram showing another embodiment of the present invention. Elements identical to those of the embodiment of FIG.

  The feature of the embodiment of FIG. 3 resides in the configuration of the upper database 15 and the configuration of the field database 16.

  The field database 16 is formed inside the field device 11, and is formed of, for example, a nonvolatile storage element such as an EEPROM or a FlashROM. The field database 16 stores a list of unique identification information of each field terminal 13 in advance.

  For example, the field database 16 is provided with a list formed in advance from a flag indicating whether setting is possible, device ID information, tag information, and address information. Here, the device ID is identification information unique to each field device 11 and each field terminal 13. The tag and address are identification information in the field network 12, and the device ID, tag, and address are unique.

  The upper database 15 stores, for example, three types of information, that is, information related to the device ID information “5945430003XXXXXXXXX”, information related to the device ID “5944540005XXXXXXXXX”, and information related to the device ID “5944540004XXXXXX”. Yes.

Further, the field terminal 13 generates parameter setting information based on the setting authority transfer information from the host system 14.
Further, the field device 11 authenticates the field terminal 13 based on the parameter setting information and the unique identification information list of the field database 16.

  The operation of the embodiment of FIG. 3 will be described.

  First, the step of storing the unique identification information list of each field terminal 13 in the field database 16 in advance is executed.

  For the field terminal 13 that has the possibility of obtaining the setting authority, the setting determination flag “1” corresponding thereto is set. Specifically, for example, for the field terminal corresponding to the device ID information “5945430005XXXXXXX”, the tag information “SETTING”, and the address information “0xFC”, the corresponding setting availability determination flag “1” is set, and the device ID information is set. For the field terminal corresponding to “5944540004XXXXXX”, tag information “FT1003”, and address information “0xFF”, a setting enable / disable determination flag “1” corresponding thereto is set.

  Next, in the embodiment of FIG. 3, steps S1, S2, S3, S4, and S5 are executed as in the embodiment of FIG.

  Next, the field device 11 executes step S7 of authenticating the field terminal 13 based on the parameter setting information from the field terminal 13 and the unique identification information list of the field database 16. Here, the parameter setting information includes device ID information, tag information, address information, and the like regarding the field terminal 13.

  The field device 11 compares the parameter setting information from the field terminal 13 with the unique identification information list in the field database 16 and identifies the field terminal 13 that has generated the parameter setting information. Specifically, the device ID information, tag information, and address information that match are checked. If there is no match, it is determined that invalid parameter setting information has occurred.

  Further, the field device 11 confirms the setting availability determination flag “1”. If the setting availability determination flag is not “1”, it is determined that invalid parameter setting information has occurred.

  In this way, the field device 11 authenticates the field terminal 13. When the field device 11 correctly authenticates the field terminal 13, the field device 11 performs internal parameter setting and adjustment based on the parameter setting information.

  Finally, step S6 is executed as in the embodiment of FIG.

  As described above, the embodiment shown in FIG. 3 can construct a highly reliable control system as in the embodiment shown in FIG.

  The operation of the embodiment of FIG. 3 will be described with reference to FIG.

  Step S02 is a step in which the field device 11 stores a list of unique identification information of each field terminal 13 in the field database 16 in advance.

  Next, steps S21, S22, S23, and S24 are executed as in the embodiment of FIG.

  Step S25 is an authentication step by the field device 11.

Next, steps S26 and S27 are executed as in the embodiment of FIG.
In this way, the embodiment of FIG. 3 performs parameter setting.

  In the embodiment of FIG. 3, even if the upper database 15 and the upper system 14 are formed so as to be connected via the field network 12, the configuration is substantially the same, and the same operation and effect can be obtained.

  Further, in the embodiment of FIG. 3, the upper database 15 and the upper system 14 are formed separately. However, even if the upper database 15 and the upper system 14 are formed by integrated hardware, the same configuration is obtained. The following effects can be obtained.

  Further, in the embodiment of FIG. 3, the host database 15 and host system 14 and the field terminal 13 delegate authority in the online communication state via the field network 12, but the host database 15 and host system 14 and field Even if the terminal 13 delegates authority in a state of being directly connected to the terminal 13 without going through the field network 12, the configuration is substantially the same, and the same operational effect can be obtained.

  The present invention is not limited to the above-described embodiments, and includes many changes and modifications without departing from the essence thereof.

It is a block diagram which shows one Example of this invention. It is a flowchart which shows the parameter setting method of the Example of FIG. It is a block diagram which shows the other Example of this invention. It is a block diagram which shows the conventional control system.

Explanation of symbols

11 Field equipment 12 Field network 13 Field terminal 14 Host system 15 Host database 16 Field database

Claims (5)

A plurality of field devices connected to the field network;
A portable field terminal that is selectively connected to the field network and controls the field device;
A host system connected to the field network and controlling the field device;
A host database connected to the host system and storing in advance a list of unique identification information of each field terminal;
The host system authenticates the field terminal based on the setting authority request information input from the field terminal and the unique identification information list, and sets authority transfer information based on the authentication and alarm information input from the field device. Produces
The control system, wherein the field device and the field terminal communicate parameter setting based on the setting authority transfer information. The field device includes a field database for storing a list of unique identification information of each field terminal in advance,
The field terminal generates parameter setting information based on the setting authority transfer information,
The control system according to claim 1, wherein the field device authenticates the field terminal from the parameter setting information and a list of unique identification information of the field database. 3. The control system according to claim 2, wherein the host system performs history management of the alarm information, the setting authority request information, and the setting authority transfer information. A plurality of field devices connected to a field network, a portable field terminal that is selectively connected to the field network and controls the field device, and a host system that is connected to the field network and controls the field device A parameter setting method for a control system comprising:
Storing a list of unique identification information of each field terminal in an upper database in advance;
The host system authenticates the field terminal based on setting authority request information input from the field terminal and the unique identification information list, and setting authority transfer information based on the authentication and alarm information input from the field device. Generating steps,
The field device and the field terminal perform parameter setting communication based on the setting authority transfer information;
A parameter setting method for a control system, comprising: A plurality of field devices connected to a field network, a portable field terminal that is selectively connected to the field network and controls the field device, and a host system that is connected to the field network and controls the field device A parameter setting method for a control system comprising:
Storing the list of unique identification information of each field terminal in advance in an upper database and storing the list of unique identification information of each field terminal in a field database in the field device in advance;
The host system authenticates the field terminal based on setting authority request information input from the field terminal and the unique identification information list, and setting authority transfer information based on the authentication and alarm information input from the field device. Generating steps,
The field terminal generating parameter setting information based on the setting authority transfer information;
The field device authenticating the field terminal from the parameter setting information and a list of unique identification information of the field database;
A parameter setting method for a control system, comprising:

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