JPH03220601A - Controller - Google Patents

Abstract

PURPOSE:To keep the present operation state of an arbitrary operation key even in the case of erroneous input operation by invalidating the operation input of the arbitrary operation key by a control part at the time of input of a key protect signal corresponding to this key to the control part. CONSTITUTION:Plural operation keys 22 to 32 and a control part 19 are provided, and the control part 19 controls the operation of a controller in response to the operation input of each of operation keys 22 to 32. When the key protect signal corresponding to an arbitrary operation key is not inputted, the operation input of this arbitrary operation key is validated; but otherside, the operation input of the arbitrary operation key is invalidated. Consequently, the operation key whose operation is invalidated is kept in the present operation state though this key is erroneously operated. Thus, the erroneous operation of operation keys is prevented to prevent unexpected operation.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to control equipment such as timers, counters, temperature regulators, etc.

(Prior Art) This type of control equipment has a plurality of operation keys and a control section, and while the plurality of operation keys are arranged on the panel surface, the control section responds to the operation input of the operation keys and There are things that control the operation of control equipment.

(Problems to be Solved by the Invention) By the way, since the operation keys are provided on the panel surface, there is a risk that they may be operated erroneously. For example, if the control equipment is installed facing a passageway in a narrow room, the body of a worker passing through the passageway may come into contact with the operation keys on the panel, causing the operation keys that were in the OFF state to be turned off. There are cases where the device is turned on involuntarily.

Of course, such erroneous operation is not a problem unique to control equipment installed in a small room, but even if it is installed in a large room, for example, if multiple operation keys are arranged closely on a narrow panel surface. It also happens often.

Therefore, the present invention aims to add a key protection function that can prevent erroneous operation of operation keys and disable operation of operation keys to prevent unwanted operations. .

(Means for Solving the Problem) In order to achieve such an object, the control device of the present invention has a plurality of operation keys and a control section, and the plurality of operation keys are configured to control the control device. The control unit controls the operation of the control device in response to the operator horn of each operation key, and also transmits a key protection signal corresponding to any operation key. When there is no input, the operation input of the arbitrary operation key is valid, and when there is an input, the input of the operation of the arbitrary operation key is invalidated.

(Function) When a key protection signal corresponding to an arbitrary operation key is input, the control section disables the operation of the arbitrary operation key in response to this input.

Therefore, for operation keys whose operation is disabled,
Even if this is operated by mistake, the current operation state of the arbitrary operation key will be maintained.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. In this embodiment, a timer will be used as the control device.

Fig. 1 is an internal circuit block diagram of a timer according to an embodiment of the present invention, Fig. 2 is a diagram showing the configuration of the panel surface of the timer, and Fig. 3 is an explanation of the keypad and operation of the timer. FIG.

The internal circuit of the timer IO of this embodiment will be explained with reference to FIG. Note that the internal circuit in FIG. 1 is shown in a simplified manner, with only the essential parts necessary for explaining the embodiment.
Circuits such as a power supply circuit, a system clock generation circuit, and a reference voltage generation circuit are omitted.

The input circuit 12 inputs various signals for controlling the operation of the timer IO from the outside, performs necessary processing, and then outputs the various signals.

A key protection signal (included in these various signals) is used in this embodiment. The operation key circuit I4 outputs an operation signal corresponding to the operation input of the operation key, which will be described later.The display circuit 16 , outputs a display device drive signal for driving a display device, which will be described later, in response to the human input of the display signal.Output circuit 1
8, the timer is output.

The control unit 19 performs output control on the display circuit 16 and the output circuit 18 in response to various signals from the input circuit 12, manual operation from the operation key circuit 14, and inputs from other circuits not shown. In particular, the operation described in FIG. 3 is performed in response to input of a key protect signal included in various signals from the input circuit I2.

The configuration of the panel surface of the timer 10 of this embodiment will be explained with reference to FIG. 2. On this panel surface 2I, a display 20,
A plurality of operation keys 22 to 32 are provided. here,
Details of the configuration of the display 20 are omitted from illustration.

The display 20 displays required contents, such as timer elapsed time, key protection status, and other necessary data, in response to input of a display drive signal from the display circuit 16. Among the plural operation keys 22 to 32, 22 is a mode key 2
4 is left/right shift)・K26 is up/down key 28
is a reset key, 30 is a display switching key, and 32 is a batch key. Note that a description of the operation contents of each of these keys is not particularly necessary in this embodiment, and will therefore be omitted.

Next, the operation of the control section 19 will be explained with reference to the flowchart in FIG.

The control unit 19 determines whether a key protect signal is input via the input circuit I2 in step nl. If no key protection signal is input, all operation keys are enabled in step n2, and a display signal for turning off the key protection display is output to the display circuit 16 in step n3. As a result, display 2
At 0, the key protection state is turned off.

On the other hand, if it is determined in step nl that a key protect signal is input, the process moves to step n4. In this step n4, it is determined from the content of the key protection signal whether the key protection for the operation key is at the first setting level. At this first setting level, only the operation input of the first key group consisting of the left/right shift key 24, up/down key 26, reset key 28, and display switching key 30 is valid, and the operation input of other operation keys is valid. This is the level at which it is invalidated. If it is determined in this step n4 that the key protection is at the first setting level, the process moves to step n5, where only the operation inputs of the first key group are valid, and the operation inputs of other operation keys are invalidated. At the same time, in step n6, the key protection state is displayed on the display 20.

Next, in step n4, if it is determined that the key protection setting level is not the first key protection setting level, the process moves to step n7. In this step n7, left/right shift key 2
4. Determine whether it is at the second setting level, which validates the operation input of the second key group consisting of the up/down key 26 and the display switching key 30, and invalidates the manual operation of other operation keys. . If it is determined that the second setting level is reached in this determination, the process moves to step n8 to enable the operation input of the second key group and invalidate the operation input of the other operation keys, and in step n6 the same as above. will be displayed.

Further, if it is determined in step n7 that the key group is not the second key group, the process moves to step n9. In this step n9, the left/right shift key 24, the up/down key 26,
It is determined whether or not a third setting level is reached, in which the operation inputs of the third key group consisting of the display switching key 30 and the batch key 32 are enabled, and the operation inputs of other operation keys are disabled. If it is determined that the third setting level is reached by this determination, the operation inputs of the third key group are made valid, and the operation inputs of the other operation keys are made invalid, and then the process moves to step n6.

In this way, according to this embodiment, the operation input for the operation key whose operation should be invalidated can be invalidated, so that the operator may accidentally touch the operation key on the panel surface. , even if that operation key is input,
Since the operation input is not considered valid, the reliability and workability of the timer operation can be improved.

(Effects of the Invention) As is clear from the above explanation, according to the present invention,
The control unit is configured so that when a key protect signal corresponding to an arbitrary operation key is input to the control unit, the control unit disables the operation input of the arbitrary operation key in response to this input. For operation keys whose operation input is disabled, a key protection function can be added that maintains the current operation state of any operation key even if it is operated by mistake.

[Brief explanation of drawings]

Fig. 1 is an internal circuit diagram of a timer to which a control device according to an embodiment of the present invention is applied, Fig. 2 is a diagram showing the configuration of the panel surface of the timer, and Fig. 3 is used to explain the operation of the timer. It is a flowchart. 12... Input circuit, 14... Operation key circuit, 16.
...Display circuit, ...Output circuit, 9...Control unit, ...Display unit, 1...Panel surface, 22-3 2...Operation keys

Claims (1)

[Claims] (1) Multiple operation keys (22 to 32) and control unit (
19), the plurality of operation keys (22 to 32) are installed on the panel surface (21) of the control device, and the control unit (19)
is for controlling the operation of the control device in response to the operation input of each of the operation keys (22 to 32), and the input of a key protection signal corresponding to any operation key is
A control device characterized in that when absent, the operation input of the arbitrary operation key is valid, and when the presence is present, the operation input of the arbitrary operation key is invalidated.