JPH10143234A - Electronic unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to detect the operation state of a load even without successively executing a control sequence software by making an electronic unit store an inspection sequence software for outputting the operation state of the load by inspection data inputted from the outside and output the operation state of the load corresponding to the inspection data. SOLUTION: The control sequence software 31 is stored in this electronic unit 1 and the operation of the load 4 is controlled through an interface 21 when the control sequence software 31 is executed. Also, while the control sequence software 31 is executed, signals are periodically outputted to a reset circuit 5. Also, the inspection sequence software 32 is stored in the electronic unit 1 and the operation state of the load 4 is outputted an inspection device 6 corresponding to inspection start signals from the external inspection device 6. Also, the inspection sequence software 32 does not output the signals to the reset circuit 5 during execution and the signals are periodically outputted from the inspection device 6 to the reset circuit 5 during an inspection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electronic unit for controlling the operation of a load in accordance with control sequence software stored in advance.

[0002]

2. Description of the Related Art In gas appliances and other appliances, the operation of a load such as a built-in motor is controlled by an electronic unit. Control sequence software is stored in the electronic unit in advance, and the operation of the load is controlled according to the control sequence software.

[0003]

In the above-mentioned conventional electronic unit, there is no means for directly confirming the control sequence software itself. Therefore, when it is necessary to check the operation status of the load at the time of shipping the device from the factory or at the time of maintenance at the installation site, connect the debugger to the electronic unit and control the control sequence software until the target load operates. I needed to run it. Therefore, it took much time to check the operation state of the load.

[0004] In view of the above problems, an object of the present invention is to provide a control device capable of detecting the operation state of a load without sequentially executing control sequence software.

[0005]

According to the present invention, there is provided an electronic unit for controlling the operation of a load in accordance with control sequence software stored in advance, wherein the electronic unit is externally input separately from the control sequence software. Inspection sequence software for outputting the operation state of the load based on the inspection data is stored, and the operation state of the load is output according to the inspection data.

At this time, the electronic unit may be reset immediately when the inspection sequence software is executed other than at the time of inspection, or within a predetermined time from the start of the execution of the electronic unit, May be provided for permitting the execution of the inspection sequence software only in a state where has not been executed once.

By executing inspection sequence software dedicated to inspection, the operating state of the load can be directly output to the outside. By the way, if the inspection sequence software is executed other than during the inspection, the control of the equipment cannot be performed normally. Therefore, the operation of the electronic unit is returned to a normal state by resetting the electronic unit immediately when the inspection sequence software is executed other than during the inspection. Further, if the inspection is always permitted, the inspection sequence software may be executed at times other than the inspection due to an erroneous operation. Therefore, within a predetermined time from the start of execution of the electronic unit,
The execution of the inspection sequence software is not permitted only when the control sequence software has never been executed.

[0008]

FIG. 1 is a block diagram for explaining the function of an electronic unit according to the present invention, and does not show the structure of the electronic unit. Referring to FIG. 1, reference numeral 1 denotes an electronic unit, which has a central processing element (CPU) 2 built therein. Further, the control sequence software 31 is stored, and when the control sequence software 31 is executed, the operation of the load 4 is controlled via the interface 21. While the control sequence software 31 is being executed, a signal is output to the reset circuit 5 periodically. The reset circuit 5 does not operate while a signal is input periodically, but outputs a reset signal to the CPU 2 when the signal is not input for a predetermined time or more to reset the entire electronic unit 1.

An inspection sequence software 32 is stored in the electronic unit 1, and the operation state of the load 4 is checked according to an inspection start signal from an external inspection device 6.
Is output to The inspection sequence software 3
2 does not output a signal to the reset circuit 5 during execution,
During the inspection, a signal is periodically output from the inspection device 6 to the reset circuit 5. With this configuration, while the inspection device 6 is connected to the electronic unit 1 and the inspection is performed, a signal is output from the inspection device 6 to the reset circuit 5 and the electronic unit 1 is not reset. However, even if the inspection sequence software is executed for some reason when the inspection device 6 is not connected, that is, when the inspection is not being performed, the electronic unit 1 is immediately reset by the reset circuit 5.

The inspection sequence software 32 is not always in an executable state. Referring to FIG.
When the electronic unit 1 is energized and the control is started, first, the flag F is set to 0 (S1). Next, it is checked whether a start command of the control sequence software 31 has been issued (S2), and the flag F remains at 0 (S3).
In addition, when the time t from the start of the control does not exceed the predetermined time T (S4), when a test start signal (test sequence start command) of the test sequence software 32 is input from the test device 6 ( S5) Inspection sequence software is executed (S6). By the way, when a control sequence start command is issued, the process proceeds from S2 to S7 and the flag F
Is reset to 1 and the control sequence software 31 is executed (S8). Therefore, the inspection sequence software 3
The condition for the execution of 2 is that the control sequence software 31 has never been executed and the elapsed time t from the start has not passed the predetermined time T,
S3 and S4 function as permission means.

[0011]

As is apparent from the above description, according to the present invention, since the inspection sequence software is stored, the operation state of the load can be inspected in a short time. In addition, even if the inspection sequence software is executed other than at the time of inspection, the electronic unit is immediately reset so that the inspection sequence software is not executed any more, thereby improving the reliability of the electronic unit.

Further, the inspection sequence software is prevented from operating unless the permission means permits it, thereby preventing the inspection sequence software from operating due to an erroneous operation or the like.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an operation of an embodiment of the present invention.

FIG. 2 is a flowchart showing control contents until each sequence software operates.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic unit 2 Central processing element (CPU) 4 Load 5 Reset circuit 6 Inspection apparatus 31 Control sequence software 32 Inspection sequence software

Claims (3)

[Claims] An electronic unit for controlling the operation of a load according to control sequence software stored in advance.
In addition to the control sequence software, inspection sequence software for outputting an operation state of the load based on inspection data input from the outside is stored, and the operation state of the load is output according to the inspection data. And an electronic unit. 2. The electronic unit according to claim 1, wherein the electronic unit is reset immediately when the inspection sequence software is executed other than during the inspection. 3. A method according to claim 1, further comprising the step of: permitting the execution of the inspection sequence software only when the control sequence software has not been executed within a predetermined time from the start of the execution of the electronic unit. The electronic unit according to claim 1 or 2, wherein