JP2019070897A - Regulator - Google Patents

Abstract

To allow parameter setting change operation by a normal user when an alarm or an event occurs, while securing safety by prohibiting operation by an outsider.SOLUTION: A keylock determination part 7 determines that a parameter setting change operation by a user is effective, when the user's operation to an operation part 2 satisfies a predetermined first condition in an ordinary time where the keylock is effective and no alarm nor event is occurring, and the operation by the user to the operation part 2 after the first condition is satisfied satisfies a predetermined second condition. The keylock determination part 7 determines that the parameter setting change operation by the user is effective, when the user's operation to the operation part 2 satisfies the second condition, when the keylock is ineffective, or the keylock is effective and an alarm or an event occurs.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a controller that controls a process amount.

  In the controller, execute functions are restricted for general users (regular users who are permitted to operate but not allowed to change settings) other than specific users (regular users who are permitted to change operations and settings) In the case, a key lock is generally used as the implementation means. As a method of setting and releasing the key lock, password management known only to a specific user is generally used, but there are the following problems.

(1) If a control error occurs at the time of setting the key lock and the general user who is on the site can not know how to release the key lock, the general user can not operate, and the control target or the operation end is serious. Failure may occur.
(2) It is necessary to perform an operation to restart the key lock after releasing the key lock, but this operation tends to be neglected. That is, although the key input work is performed after the key lock is released, the key lock resume is not performed because the key lock person does not know the key lock resume method after forgetting the key lock resume after performing the desired work. There is a possibility that problems will occur due to unexpected key input.

  Therefore, a method has been proposed in which the key lock is forcibly released only when an abnormality or an emergency occurs and an alarm is issued, and anyone can operate it (Patent Document 1, Patent Document 2) reference).

  However, when the method disclosed in Patent Document 1 and Patent Document 2 is applied to a controller, an outsider who is not permitted to operate the controller at all when an alarm is issued (a person who is neither a specific user nor a general user) Even in the case of), the operation of the controller would be permitted, and there was a safety problem.

JP, 2009-236472, A JP 2011-504333 gazette

  The present invention has been made to solve the above-mentioned problems, and prohibits an operation by an outsider to ensure safety, and enables an authorized user to change a parameter setting when an alarm or an event occurs. It aims to provide a controller.

According to the controller of the present invention, a control unit configured to perform a predetermined operation according to a set parameter, an operation unit configured to receive an operation input from the user, and a parameter setting change operation by the user are effective. And the key lock determination unit is configured to determine whether the key lock is valid / invalid and whether a predetermined alarm or a predetermined event of the controller is generated. Whether or not to make the parameter setting change operation by the user effective based on whether or not the operation permission level is determined based on the presence / absence and whether the operation permission level and the user's operation on the operation unit satisfy a predetermined condition It is characterized in that
In one configuration example of the controller according to the present invention, the operation permission level is permitted to change parameter setting operation regardless of the valid / invalid state of the key lock and the presence or absence of the alarm or the event. Parameter setting change operation is permitted only when the key lock is disabled or when the key lock is enabled and the alarm or the event occurs, at a first level lower than the first level Parameter setting change operation is prohibited at the second level and at a level lower than the second level regardless of whether the key lock is enabled / disabled and whether the alarm or the event occurs. It is characterized by being divided into three levels.

In one configuration example of the controller of the present invention, the key lock determination unit sets the first level to an initial state of the operation permission level, and when the key lock is disabled or when the key lock is enabled The operation permission level may be set to the second level when an alarm or the event occurs.
In one configuration example of the controller according to the present invention, the key lock determination unit determines that the user operates the operation unit at a predetermined time when the key lock is enabled and the alarm and the event are not generated. When the first condition is satisfied and the user's operation on the operation unit after the establishment of the first condition satisfies a predetermined second condition, the parameter setting change operation by the user is validated, and the key lock is invalidated, or At the time of activation of the key lock and occurrence of the alarm or the event, when the user's operation on the operation unit satisfies the second condition, the parameter setting change operation by the user is enabled. is there.

Further, in one configuration example of the controller according to the present invention, the key lock determination unit makes the parameter setting change operation by the user effective when the key lock is activated and the alarm or the event occurs. When returning from the occurrence state of or the occurrence state of the event, the parameter setting change operation by the user is invalidated.
In one configuration example of the controller according to the present invention, the key lock determination unit validates the parameter setting change operation by the user, and then, when a predetermined time has elapsed from the user's last operation on the operation unit, It is characterized in that the parameter setting change operation by the user is invalidated.
In one configuration example of the controller according to the present invention, the first condition is that the specific user password input by the user is correct, and the second condition is that the user's release operation on the operation unit is correct. It is characterized by
Further, in one configuration example of the controller of the present invention, the key lock determination unit is characterized in that all operations by the user are invalidated when a specific alarm occurs.

  According to the present invention, by providing the key lock determination unit, even when the key lock is enabled, when a predetermined alarm or a predetermined event occurs, the parameter setting change operation of the controller can be performed even by a general user. It is possible to cope with abnormalities promptly. In addition, since the parameter setting change operation is prohibited regardless of the valid / invalid state of the key lock and the presence or absence of an alarm or an event, an outsider can ensure safety.

FIG. 1 is a block diagram showing the configuration of a controller according to an embodiment of the present invention. FIG. 2 is a flowchart for explaining the operation of the key lock determination unit of the controller according to the embodiment of the present invention. FIG. 3 is a flowchart for explaining the operation of the key lock determination unit of the controller according to the embodiment of the present invention. FIG. 4 is a flowchart for explaining the operation of the key lock determination unit of the controller according to the embodiment of the present invention. FIG. 5 is a block diagram showing a configuration example of a computer for realizing the controller according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a controller according to an embodiment of the present invention. The controller includes a display unit 1 including a display device such as an LED and a liquid crystal panel, and an input device such as a tact switch, an electrostatic switch and a touch panel, and an operation unit 2 receiving operation input from a user In accordance with the display processing unit 3 to be controlled, the operation input processing unit 4 for receiving an operation from the user via the operation unit 2, the parameter processing unit 5 for setting parameters related to the operation of the controller, and the set parameters Control calculation processing for calculating control output values so that measured values and target values match, and control unit 6 that controls the entire controller, and whether or not to enable parameter setting change operation by the user A key lock determination unit 7 is provided.

  The control unit 6 calculates control output values (such as the operation amount MV, the current value, and the voltage value) such that the measured value of the process amount (the control amount PV) and the target value SP coincide with each other. As well known, a control algorithm of the control unit 6 is, for example, a PID. Also, the control unit 6 outputs an alarm when there is an instrument error inside the controller such as data destruction or an input (measured value) error, or an event or measurement in which the measured value reaches a predetermined upper or lower limit value. The event output is performed when an event in which a deviation between a value and a target value reaches a predetermined upper and lower limit value or an event preset by a user of the controller such as heater disconnection or heater short circuit occurs. The specific user can set the event function in advance by operating the operation unit 2 and can turn on the event output when a predetermined situation occurs.

  Further, the control unit 6 passes to the display processing unit 3 data automatically selected according to a predetermined rule, or data selected according to the user's operation. The display processing unit 3 creates display data based on the data received from the control unit 6. A driver (not shown) in the display unit 1 that receives the display data from the display processing unit 3 drives a display device such as an LED or a liquid crystal panel based on the display data. Thus, the information of the content according to the display data is displayed on the display unit 1.

  In the present embodiment, the user of the controller can be designated as a specific user (a legitimate user who is permitted operations other than parameter setting change and parameter setting change) and a general user (an operation other than parameter setting change is permitted but parameter setting The change is divided into legitimate users who are not permitted, and other people are treated as outsiders.

A specific user password for permitting only a specific user the parameter setting change operation of the controller at normal time is prepared, and this specific user password is notified in advance only to the specific user. Hereinafter, the fact that the input specific user password is correct is referred to as a first condition.
Furthermore, in order to operate the controller, a special release operation for the controller is required, and this release operation is notified in advance to specific users and general users. Hereinafter, the fact that the release operation is correct is referred to as a second condition.

  With key lock enabled, under normal conditions (when there is no alarm notification etc.), the first condition that the entered specific user password is correct is satisfied in order to perform parameter setting change operation of the controller If the second condition that the release operation to be performed subsequently is correct is satisfied after the first condition is satisfied, the subsequent operation is validated. As a result, normally, only a specific user can perform parameter setting change operations of the controller, and general users and outsiders can not perform parameter setting change operations.

  When an alarm occurs or an event occurs while the key lock is enabled, a specific user or a general user performs only a release operation in order to perform parameter setting change operation of the controller. When the second condition that the release operation is correct is satisfied, the subsequent operation is validated. Thus, when an alarm occurs or an event occurs, a specific user and a general user can perform parameter setting change operations of the controller, but an outsider can not perform parameter setting change operations.

  Table 1 shows the authority of the parameter setting change operation of the specific user, Table 2 shows the authority of the general user parameter setting change operation, and Table 3 shows the authority of the outside user's parameter setting change operation.

  If the second condition is satisfied when the key lock is disabled or when the key lock is enabled and an alarm or event occurs, the specific user is permitted to change the parameter setting operation, and when the key lock is enabled and normal, If both the first and second conditions are satisfied, the parameter setting change operation is permitted.

If the second condition is satisfied when the key lock is disabled or when the key lock is enabled and an alarm or event occurs, the general user is permitted to change the parameter setting operation, and when the key lock is enabled and normal, Parameter setting change operation is prohibited.
An outsider is prohibited from changing the parameter setting regardless of whether the key lock is valid / invalid or normal / when the event occurs.

FIG.2, FIG.3, FIG.4 is a flowchart explaining operation | movement of the key lock determination part 7 of the controller of a present Example. It goes without saying that A in FIGS. 2 and 3 are connected, B in FIGS. 2 and 3 and 4 are connected, and C in FIGS. 2 and 4 are connected.
When the controller is powered on and activated, the key lock determination unit 7 sets the operation permission level to the first level (the level of the authority of the specific user) (FIG. 2, step S100).

  Subsequently, the key lock determination unit 7 determines whether the key lock is in an effective state (step S101 in FIG. 2). As a method of setting / releasing the key lock, there is a method such as password management known only by a specific user as is well known. The present invention can be applied regardless of the setting method and releasing method of the key lock.

When the key lock is in an effective state (YES in step S101), key lock determination unit 7 determines whether a predetermined alarm or a predetermined event has occurred in the controller (step S102 in FIG. 2). .
In a normal state in which a predetermined alarm and a predetermined event have not occurred in the controller (NO in step S102), the key lock determination unit 7 determines whether the first condition is satisfied (step S103 in FIG. 2).

  The key lock determination unit 7 determines that the first condition is satisfied when the password is input by the operation of the operation unit 2 by the user, and this password matches the preset specific user password. After the first condition is established, the key lock determination unit 7 determines whether the second condition is established (step S104 in FIG. 2). The key lock determination unit 7 determines that the second condition is satisfied when the user's operation on the operation unit 2 matches the preset release operation. An example of the release operation is, for example, an operation of pressing a plurality of predetermined keys in a predetermined order.

  When the first condition and the second condition are both satisfied (YES in step S104), the key lock determination unit 7 validates the parameter setting change operation by the user (step S105 in FIG. 2). In this way, when the key lock is enabled and normally, the specific user can operate the operation unit 2 to change the setting of the parameter by satisfying both the first condition and the second condition. The parameter processing unit 5 sets parameters in accordance with an operation on the operation unit 2 by the user. Examples of parameters include, for example, control parameters (for example, PID parameters) and a target value SP.

  After the key lock determination unit 7 validates the parameter setting change operation by the user, when there is no operation of the operation unit 2 by the user (YES in FIG. 2 step S106), time measurement starts (FIG. 2 step S107). Then, when a predetermined time has elapsed since the last operation on the operation unit 2 by the user (YES in FIG. 2 step S109), the key lock determination unit 7 sets the measurement time by the timer to 0 (step S110 in FIG. 2). The setting change operation is invalidated (step S111 in FIG. 2). After that, the parameter setting change operation can not be performed. When the user operates the operation unit 2 during clocking, the key lock determination unit 7 sets the measurement time by the timer to 0 (step S112 in FIG. 2), and returns to step S106.

  In addition, when a predetermined alarm or a predetermined event occurs in the controller while key lock is in effect (YES in step S102), key lock determination unit 7 sets the operation permission level lower than the first level. It sets to 2 levels (levels of authority of a specific user and a general user) (Drawing 3 step S113). An operation permission level at which the parameter setting change operation is inhibited at a level lower than the second level regardless of whether the key lock is valid / invalid and whether an alarm or an event occurs is referred to as a third level. Then, the key lock determination unit 7 determines whether the second condition is satisfied (step S114 in FIG. 3).

  When the second condition is satisfied (YES in step S114), the key lock determination unit 7 validates the parameter setting change operation by the user (step S115 in FIG. 3). Thus, when the key lock is activated and an alarm or event occurs, the specific user or the general user can operate the operation unit 2 to change the setting of the parameter by satisfying the second condition.

  When the controller recovers from the alarm generation state or the event generation state detected in step S102 (YES in FIG. 3 step S116), the key lock determination unit 7 invalidates the parameter setting change operation by the user (FIG. 3). Step S117) The operation permission level is returned to the first level (step S118 in FIG. 3).

  Further, as described above, when a predetermined time has elapsed since the last operation on the operation unit 2 by the user, the key lock determination unit 7 invalidates the parameter setting change operation by the user (step S117). It may return to one level (step S118). The processes of steps S119 to S124 of FIG. 3 are the same as steps S106 to S110 and S112 of FIG.

  When the key lock is invalid (NO in step S101 in FIG. 2), the key lock determination unit 7 sets the operation permission level to the second level (step S125 in FIG. 4). Then, the key lock determination unit 7 determines whether the second condition is satisfied (step S126 in FIG. 4).

  When the second condition is satisfied (YES in step S126), the key lock determination unit 7 validates the parameter setting change operation by the user (step S127 in FIG. 4). Further, when a predetermined time has elapsed since the last operation on the operation unit 2 by the user, the key lock determination unit 7 invalidates the parameter setting change operation by the user (step S133 in FIG. 4), and sets the operation permission level to the first level. (Step S134 in FIG. 4). The processes of steps S128 to S132 and S135 of FIG. 4 are the same as steps S106 to S110 and S112 of FIG. Thus, when the key lock is disabled, the specific user or the general user can operate the operation unit 2 to change the setting of the parameter by satisfying the second condition.

  As described above, in the present embodiment, even when key lock is enabled, when a predetermined alarm or a predetermined event occurs, even a general user can perform parameter setting change operation of the controller, and promptly cope with an abnormality. can do. In addition, since outsiders are prohibited from changing parameter settings regardless of whether the key lock is valid / invalid or normal / when an event occurs, security can be ensured.

  When the key lock determination unit 7 generates a specific serious alarm (for example, a communication abnormality with the host device), the operation by the user is performed regardless of whether the operation permission level or the first and second conditions are satisfied. The state in which all are disabled may be continued until this critical alarm is cleared. Thus, the reason for disabling all operations by the user is to prevent the user from performing an inappropriate operation when a serious alarm occurs.

  In the present embodiment, the first condition is that the input specific user password is correct, and the second condition is that the special release operation is correct. However, the present invention is not limited to this. For example, the fact that both password inputs are correct may be set as the first and second conditions, or the fact that both types of special operations are correct may be set as the first and second conditions.

  The controller described in the present embodiment can be realized by a computer having a central processing unit (CPU), a storage device, and an interface, and a program for controlling these hardware resources. An example of the configuration of this computer is shown in FIG. The computer includes a CPU 50, a storage device 51, and an interface device (hereinafter abbreviated as I / F) 52.

  For example, an operation terminal such as a heater, a sensor, and a host device are connected to the I / F 52. In such a computer, a program for realizing the method of the present invention is provided in the state of being recorded on a recording medium such as a flexible disk, a CD-ROM, a DVD-ROM, a memory card, etc. Ru. The CPU 50 executes the processing described in the present embodiment in accordance with the program stored in the storage device 51.

  The present invention can be applied to a controller.

  Reference Signs List 1 display unit 2 operation unit 3 display processing unit 4 operation input processing unit 5 parameter processing unit 6 control unit 7 key lock determination unit.

Claims (8)

A control unit configured to perform a predetermined operation according to the set parameter;
An operation unit configured to receive an operation input from a user;
And a key lock determination unit configured to determine whether or not to make the parameter setting change operation by the user effective.
The key lock determination unit determines an operation permission level based on the key lock enabled / disabled state and the presence or absence of a predetermined alarm of a controller or a predetermined event, and the operation permission level and the operation unit are determined. A controller characterized by determining whether or not a parameter setting change operation by a user is to be validated based on whether or not a user operation satisfies a predetermined condition. In the controller according to claim 1,
The operation permission level is
A first level at which a parameter setting change operation is permitted regardless of the valid / invalid state of the key lock and the presence or absence of the alarm or the occurrence of the event;
At a level lower than the first level, a second level at which a parameter setting change operation is permitted only when the key lock is disabled or when the key lock is enabled and the alarm or the event occurs.
At a level lower than this second level, it is divided into a valid / invalid state of the key lock and a third level in which the parameter setting change operation is prohibited regardless of the occurrence of the alarm or the event. A controller that is characterized by In the controller according to claim 2,
The key lock determination unit sets the first level to an initial state of the operation permission level, and when the key lock is invalid or when the key lock is valid and the alarm or the event occurs, the operation permission level is set. A controller characterized in that the second level. The controller according to any one of claims 1 to 3.
The key lock determination unit is configured such that when the key lock is enabled and the alarm and the event are not normally generated, the user's operation on the operation unit satisfies a predetermined first condition, and the first condition is satisfied. When the user's operation on the operation unit satisfies the predetermined second condition, the parameter setting change operation by the user is enabled, the key lock is disabled, or the key lock is enabled and the alarm or event is A controller, wherein, when generated, a parameter setting change operation by the user is enabled when the user's operation on the operation unit satisfies the second condition. In the controller according to claim 4,
The key lock determination unit validates the parameter setting change operation by the user when the key lock is enabled and when the alarm or the event occurs, and then returns from the occurrence state of the alarm or the occurrence state of the event A controller characterized by disabling the parameter setting change operation by the user. In the controller according to claim 4,
The key lock determination unit invalidates the parameter setting change operation by the user when a predetermined time has elapsed from the last operation by the user on the operation unit after the parameter setting change operation by the user is enabled. And a controller. The controller according to any one of claims 4 to 6,
The controller according to claim 1, wherein the first condition is that the specific user password input by the user is correct, and the second condition is that the user's release operation on the operation unit is correct. The controller according to any one of claims 1 to 7.
The controller, wherein the key lock determination unit invalidates all operations by the user when a specific alarm occurs.

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