JPH07122804B2 - Model selection error detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a model selection error detection device mainly for household electric appliances, such as fan heaters, which uses the same controller for a plurality of models.

<Prior Art> In recent years, the number of types of household electric appliances has tended to increase with the diversification of applications and multifunctionalization. On the other hand, in order to reduce the cost as much as possible, the constituent elements such as the controller are commonly used for each model. In this case, since it is necessary to control each model independently while also using the controller, for example, in the case of fan heaters, switch the model selection switch according to the model, and use the jumper wire to control the controller corresponding to the model. I am trying to connect to the circuit part.

<Problems to be Solved by the Invention> However, if the number of models is three or more, there is a risk of erroneous connection. For example, in the fan heater described above, the sequence control circuit may be operated by the controller even if erroneous connection is made. If the sequencer is driven and the sequence control is erroneously performed and the operation is continued in an extremely dangerous state, there is a risk of causing serious trouble such as damage or burning of equipment.

<Purpose of the invention> The present invention solves the above-mentioned problems of the prior art, monitors the operating state even after the connection of the controller is finished, and displays the case of an incorrect connection, and makes it a dangerous operating state. It is an object of the present invention to provide a model selection error detection device capable of stopping sequence control before entering.

<Means for Solving Problems> The model selection error detection device of the present invention has the following configuration in order to achieve the above object. That is, the present invention is a model selection error detection device in a compatible device that can use the same controller for each of a plurality of models. Model selection switches S1 to S5,
One of the control circuits C1 to C5 corresponding to each model,
A sequence control circuit 6 which has a built-in circuit for performing sequence control for device operation, initializes the circuit operation by turning on the operation switch 5, and first instructs the controller 1 to perform a model selection error detection operation; An interface 4 for externally connecting any one of the control circuits C1 to C5 corresponding to each model to the controller 1; The model selection switches S1 to S5
And a model selection circuit 3 that forms a corresponding model signal by turning on any model selection switch, and a selection model signal input from the model selection circuit 3 and the interface 4 Based on the signal from any one of the control circuits C1 to C5, it is determined whether or not the correct one control circuit C1 to C5 corresponding to the selected model is connected, and the determination result is displayed on the display 7 Is displayed, and if it is determined that it is correct, the sequence control circuit 6 issues an instruction to start the sequence control, and if it is determined that there is an erroneous connection, the sequence control circuit 6 issues an instruction to stop the sequence control. Circuit 2
It is characterized by the provision of.

<Operation> Due to the above characteristics, when a certain model is selected, one of the model selection switches S1 to S1 corresponding to the model is selected.
When S5 is turned on and the operation switch 5 is turned on after the connection work of any of the control circuits C1 to C5 to the controller 1 is completed, the selection correct / incorrect judgment circuit 2 first selects the model through the sequence control circuit 6. From the signal from the circuit 3 and the signal from any of the connected control circuits C1 to C5,
It is determined whether or not a normal connection is made to the selected model, and if it is determined that the connection is incorrect, a message indicating that the connection is incorrect is displayed on the display 7 and the sequence control is performed. The sequence control by the circuit 6 is stopped. Therefore, since the sequence control is stopped before the dangerous operation state is entered, damage or burnout of the device due to incorrect connection does not occur. When the incorrect connection is displayed, the connection is made again, and when the connection is correct, this is displayed on the display 7 and the sequence control by the sequence control circuit 6 is started.

<Embodiment> Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1 showing a block configuration of an embodiment of the present invention, a block indicated by a broken line is a general-purpose controller 1 which is also used for each model, and it is determined whether or not the connection to the selected model is correct. The selection correct / wrong judgment circuit 2 and a plurality of (five in the embodiment) model selection switches S1 to S5 each having a circuit section corresponding to each model and externally connected to each other are switched and connected to form a corresponding model signal. The model selection circuit 3 adapted to do so and a plurality (five in the embodiment) of control circuits C1 to C5 respectively corresponding to external models are selectively provided to the selection correctness determination circuit 2 of the controller 1. It has a built-in interface 4 for connection. Reference numeral 5 is an operation switch for starting the equipment, and when the operation switch 5 is turned on, the sequence control circuit 6 is started. After initializing the circuit operation by the internal setting circuit 61, the sequence control circuit 6 first issues an instruction for the discriminating operation by the selection correctness / incorrectness determination circuit 2, and the sequence control operation based on the instruction from the selection correctness / incorrectness determination circuit 2. To start or stop. The display 7 displays the determination result of the selection correctness determination circuit 2 of the controller 1.

Next, the operation of the above embodiment will be described based on the second flowchart. Based on the selected model, the required model selection switches S1 to S5 are turned on, and any of the required control circuits C1 to C5 is connected to the selection correctness determination circuit 2 via the interface 4. When the wiring of the controller 1 is completed in this way, the operation switch 5 is turned on [flow (A)] to start the device. When the operation switch 5 is turned on, the initial setting circuit 61 of the sequence control circuit 6 is first driven and reset to the initial state [Flow (B)]. Then, when the operation is started, the selection correctness determination circuit 2 selects the selected model from the selection signal from the model selection circuit 3 and the signal from any one of the connected control circuits C1 to C5. It is determined whether the above wiring is correct [Flow (C)]. As the determination operation, for example, when there is a signal unique to each model, the presence or absence of the output of this signal is detected, and when the output level is different for each model, it corresponds to each model. An output signal is compared by a comparison circuit having a threshold level. In any case, the device-specific signal detected according to the applied device and the selected model signal from the model selection circuit 3 selected by the model selection switches S1 to S5 may be compared.

When the selection correctness determination circuit 2 determines that the wiring is correct, it is determined to be YES in the flow (C) and the flow proceeds to the flow (D), and the display 7 displays that the wiring is normal. At the same time, the sequence control operation by the sense control circuit 6 is started by a command signal from the controller 1 (Flow (E)). On the other hand, when the selection correctness determination circuit 2 determines that the wiring is incorrect, the display 7 indicates that the wiring is incorrect [Flow (F)].
And the controller 1 stops the sequence control by the sequence control circuit 6 [flow (G)]. The wiring is changed again according to the display on the display unit 7, and the wiring is re-wired until the display indicating that the wiring is normal is displayed.

<Effect> As described above in detail, according to the model selection error detecting device of the present invention, when a certain model is selected from a plurality of types, the corresponding model is selected by the model selection switches S1 to S5. Any one of the control circuits C1 to C5 selected and externally connected,
Since the selection correctness determination circuit 2 determines whether or not the model selected by the model selection switches S1 to S5 is correctly connected, the selection by the model selection switches S1 to S5 and the connection of the control circuits C1 to C5 are performed. Whether or not the connection of the specific model is correct can be determined from the two conditions described above, and the error in the model selection can be detected very reliably. In addition, since the correctness is determined by turning on the operation switch 5, it is possible to avoid miswiring. Of course, in the case of miswiring, since this is displayed and notified and the sequence control is stopped, it is possible to reliably prevent damage or burning of the device due to miswiring.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a model selection error detecting device of the present invention, and FIG. 2 is a flowchart of FIG. 1: Controller 2: Selection correctness judgment circuit 6: Sequence control circuit 7: Display S1 to S5: Model selection switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Chikada, No. 32, Akashi-cho, Chuo-ku, Kobe-shi, Hyogo (56) References JP-A-57-64803 (JP, A) JP-A-59- 216250 (JP, A)

Claims (1)

[Claims] 1. A model selection error detecting device in a device having compatibility capable of using the same controller for each of a plurality of models, wherein a plurality of device selection error detecting devices are externally connected to the controller 1. Model selection switch S1
~ S5 and any control circuit C1 corresponding to each model
~ C5 and a circuit for performing sequence control for equipment operation, sequence control for initializing the circuit operation by turning on the operation switch 5 and first instructing the controller 1 to perform an operation of model selection error detection The controller 1 has at least a circuit 6 and a display 7 for displaying the result of model selection, and the controller 1 is for externally connecting any one of the control circuits C1 to C5 corresponding to each model to the controller 1. The interface 4 and the model selection circuit 3 that is connected to the model selection switches S1 to S5 and that forms a corresponding model signal by turning on one of the model selection switches, and the selection input from the model selection circuit 3. From the model signal and the signal from any one of the control circuits C1 to C5 input via the interface 4, the correct corresponding model is selected. The display device 7 and the determination result with One of the control circuit C1~C5 it is determined whether it is connected
To the start of the sequence control by the sequence control circuit 6 when it is determined to be correct, and to stop the sequence control by the sequence control circuit 6 when the connection is determined to be incorrect. A model selection error detection device characterized in that a circuit 2 is provided.