JPH05108188A - Data setting device - Google Patents

Abstract

PURPOSE:To release a password without disturbing the intended purpose of utilizing the password when a user suddenly forgets his password. CONSTITUTION:The device consists of a memory 7 storing the order of a series of operations with plural operation keys, an operation order comparison means 10 judging whether or not the order of a series of operations with the plural operation keys coincides with the stored order of operations, a power-off detection means 13 detecting the operation of turning off the power source of the device, and a password releasing means 14 releasing the password when the operation order comparison means 10 detects the coincidence in the order of operations and when the power-off detection means 13 detects the off operation of the device power source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data setting device applicable to a controller or the like for controlling a process, and more specifically to prevent anyone from changing various set data or parameters. The present invention relates to a data setting device that uses the password, and has a function for canceling the once determined password.

[0002]

2. Description of the Related Art In a controller for controlling a process, various data such as PID calculation parameters and upper and lower limit alarm set values are set, and control calculation and alarm display are performed according to these set data or parameters. I am supposed to do it. Therefore, if any of these data and parameters that have been set can be arbitrarily changed, an incorrect value may be set, and normal control operation may not be possible. Therefore, in order to allow only specific people to set data and parameters, use a password that only that specific person knows, and configure it so that data and parameters can be set only when this password is entered. is there.

[0003]

If a device using such a password does not have a function for canceling the password once set, if the password is forgotten, the set data and parameters cannot be permanently changed. If the memory that stores the password is configured to be backed up by a battery, the password can be released by removing the battery, but on the contrary, the password can be easily released by a third party. There is a problem that the malicious intent cannot be prevented.
The present invention has been made in view of such a point, and even if a password is forgotten, only a specific person can cancel the password. The purpose is to provide.

[0004]

According to the present invention which achieves the above object, a plurality of operation keys and a predetermined password are stored and data is set only when the password is input by the operation key. A data setting device comprising a data setting permission unit for permitting a change, wherein a memory storing a series of operation sequences of the plurality of operation keys and a series of operation sequences of the plurality of operation keys are stored in the memory. The operation order comparison means for determining whether the operation order matches the existing operation order, the power-off detection means for detecting an operation for turning off the power of the apparatus, and the operation order comparison means for matching the operation order after the power of the apparatus is turned on. And a password release means for releasing the password when the power-off detection means detects an operation to turn off the power of the apparatus. A constant apparatus.

[0005]

When the password is to be released, a plurality of operation keys are operated in a predetermined order. The operation order comparison means compares the order of the key operation with the predetermined operation order. The password cancellation means cancels the password when the operation order comparison means detects a match and when the power-off detection means detects a power-off operation of the device. As a result, the password can be released under the limited conditions.

[0006]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a configuration block diagram showing an embodiment of the present invention. In this embodiment, the present invention is applied to a controller for process control. In the figure, 1
Is a control calculation means that performs, for example, PID control calculation on the deviation between the process amount PV and the control target set value SV, and sends the calculation result to the process as a control output MV. Reference numeral 2 denotes a setting means for setting, for example, PID calculation constants (parameters) used in the control calculation means 1 and various operating environments of the control calculation means. Reference numeral 3 is a display control means for inputting the process amount PV and control target value SV, and 4 is a display device for displaying the process amount PV, control target value SV, etc. under the control of the display control means 3, and displays characters and figures. For example, a full-dot liquid crystal display capable of displaying mixedly is used. These display control means 3 and display 4
In addition to displaying the process amount PV and the control target value SV, is also configured to be used when setting a password, setting parameters, environment, and the like.

Reference numeral 5 denotes a keyboard composed of a plurality of operation keys, which is installed around the display unit 4 and develops a screen displayed on the display unit 4 and inputs control operation instructions, various data, parameters, passwords and the like. Used at the time of. 6 is a password setting means for setting a predetermined password, which displays a screen for password setting on the display unit 4,
A predetermined password can be set based on the signal from the operation key. Reference numeral 7 is a memory for storing the password set by the password setting means 6. Reference numeral 8 denotes a setting permission unit that permits the setting and changing of data by the setting unit 2 based on an instruction from the operation key only when a signal from the operation key is input and a predetermined password is input. Reference numeral 9 is a memory for storing a predetermined operation sequence (procedure) of a plurality of operation keys 5, 10 is a signal input from the plurality of operation keys 5, and the operation sequence is stored in the memory 9. It is an operation order comparing unit that determines whether or not the operation order matches. Reference numeral 11 denotes a power supply circuit, which is supplied with electric power from the outside through a power supply switch 12 and stabilizes it to supply it to each part. Reference numeral 13 denotes a power-off detecting means for detecting an operation of turning off the power by the power switch 10, which is a switch of the power switch 10.
By inputting the status or by detecting the voltage drop in the power supply circuit, it is detected that the power supply is once turned off. When the operation order comparing unit 10 detects the coincidence of the operation order and the power off detecting unit 13 detects the operation of the power off after the power of the apparatus is turned off and then on, the memory 14 is a memory. 7 is a password releasing means for releasing the password already stored in 7.

FIG. 2 is a diagram showing a password setting screen displayed on the display unit 4 when the password is set or input by the password setting means 6 and the respective functions assigned to the operation keys at that time. Is. 61 is a tag number attached to the control loop handled by the control calculation means 1, 62 is a display section showing a password settable state / password input state, 63 is a password display section, and 64 is a lock / unlock It is a display part which shows a locked state. When the password can be set, "S" appears on the display 62.
ET PASSWORD "is displayed, and the display unit 6
"UNLOCK" is displayed in 4. In this state, the key KY1 functioning as a cursor movement key is operated to select a digit (in the password display portion 63,
(The selected digit is highlighted.) And press key KY4.
Press KY5 to sequentially determine the desired value for each digit. When the password is determined in this way, the key KY2 functioning as a password setting key is then pressed.
Then, all the passwords displayed on the password display portion 63 are highlighted. After confirming the state, when the key KY2 is pressed again, the password display disappears, and "ENT PASSWORD" is displayed on the display unit 62.
“LOCK” is displayed on the screen, and the password is set. The password thus set is stored in the battery-backed memory 7.

Even when the password is entered by the password setting means 6, this screen is displayed on the display unit 4.
When the password can be entered, the display 62 displays “ENT.
"PASSWORD" is displayed, and the display unit 64
"LOCK" is displayed at. In this state, the key KY3 functioning as a password input key is pressed.
Then, "0000" is displayed on the display unit 63, and the leftmost digit is highlighted. This reverse display means that the digit is selected. The digit to be selected can be selected with the key KY1. For each selected digit, press the keys KY4 and KY5 to align the previously entered passwords. When all the passwords have been collected, the key KY3 which functions as a password input key is pressed next. Here, the setting permission means 8 determines whether the passwords match, and if they match, the password displayed on the password display portion 63 disappears and the display portion 6 disappears.
"SET PASSWORD" is displayed on 2 and again
“UNLOCK” is displayed on the display unit 64, and thereafter, various parameters can be set using the operation keys. On the other hand, if the passwords do not match, the display unit 6
“0000” is displayed again in 3, and various parameters cannot be set.

In the device thus constructed, for example, the operation for canceling the password when the password is forgotten will be described below. FIG. 3 is a flowchart showing the operation at this time. First, a state in which a password setting / input screen as shown in FIG. 2 is displayed on the display device 4 (when the password can be input, “ENT” is displayed on the display unit 62.
"PASSWORD" is displayed, and the display unit 64
In the state where “LOCK” is displayed, the plurality of operation keys are operated in a predetermined order. The operation sequence is, for example, KY1 → KY2 → K.
Press Y3 → KY4 and KY5 at the same time → K9, KY4 and K
The order may include an operation of simultaneously pressing a plurality of keys such as simultaneously pressing Y5. The comparison means 10 compares the order of such key operations with the key order stored in the memory 9 in advance, and if the input order matches, the flag F1 in the password releasing means 14 is set. .. The state of this flag is assumed to be retained even when the power is turned off. Next, from this state, the operation of turning off the power switch 12 and the operation of turning it on thereafter are performed. In the case of a device that does not have a power switch, the connector connected to the power supply line is removed and then reconnected. The power-off state detecting means 13 detects that the power supply is once turned off by such a power-off / on operation,
It is transmitted to the password releasing means 14. When the flag F1 is set and the power-off detection means 13 outputs a signal indicating that the power is once turned off, the password cancellation means 14 cancels the password stored in the memory 7, A new password can be set.

Even if the keys are operated in a predetermined order, if another key is operated without the power being turned off after that, the flag F1 is turned off and the power is then turned off. The password is not canceled even in the off / on state. In this embodiment, the case where the keys K1 to KY5 are used to cancel the password has been described, but the operation of the other operation keys provided on the front panel may be combined to determine the order of the key operation. Further, it can be similarly applied to devices other than the controller for controlling the process.

[0012]

As described in detail above, the present invention is
It is configured so that the password can be released for the first time by combining the specific key operation sequence and the operation of turning off the power once. In the unlikely event that the original purpose of using the password is not disturbed, If you forget, you can achieve the cancellation of the password.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a password setting screen displayed on a display unit when a password is set by a password setting means and each function assigned to a key.

FIG. 3 is a flowchart showing an operation for canceling a password.

[Explanation of symbols]

 1 Control Calculation Means 2 Setting Means 3 Display Control Means 4 Display 5 Keyboard 6 Password Setting Means 7 Memory 8 Setting Allowing Means 9 Memory 10 Operation Sequence Comparison Means 11 Power Circuit 12 Power Switch 13 Power Off Detecting Means 14 Password Canceling Means

Claims (1)

[Claims] 1. A data setting device comprising a plurality of operation keys and a data setting permission means for storing a predetermined password and permitting data setting and changing only when the password is input by the operation keys. A memory for storing a series of operation orders of the plurality of operation keys, and an operation order comparison means for determining whether the series of operation orders of the plurality of operation keys match the operation order stored in the memory, The power-off detection means for detecting the operation of turning off the power of the device and the operation order comparison means have detected the coincidence of the operation order after the power of the device is turned on, and the power-off detection means is the power supply of the device. And a password canceling unit for canceling the password when an off operation is detected.