JPS6156524B2 - - Google Patents

Description

[Detailed Description of the Invention] The purpose of the present invention is to change the timer and/or clock advance timing of an air conditioning control device using a stored program method to simplify operation checks in the device testing process. .

Conventionally, when checking a stored program type control device, etc., if a timer function or time timer function is added inside the device, other operations are performed after the timer ends, the time matches, etc. There are many. As a result, the timer is long, and in order to match the set time with the clock and observe its operation, the actual time is required to judge and adjust the device, and it takes a lot of time to test the device. The downside is that it costs a lot of money.

This invention was made in order to eliminate the above-mentioned drawbacks. A test switch is provided outside the central processing unit (CPU), the input of this test switch is read, and a normal routine and a test routine are provided inside the CPU. When there is a test input, various timer times can be changed through the test routine, and
Alternatively, the purpose is to shorten the testing time of the control device by changing the clock running speed.

An embodiment of the present invention will be described below with reference to the drawings.

In Figure 1, 1 is a stored program type 1-chip CPU with internal and external input/output I/O.
In the figure, input terminals I ₁ to I ₄ and output terminal O ₁ are used as terminals.
~ _O6 and input scan output terminals _S1 ~ _S3 . 2 is a D/A converter that converts digital information from the output terminals O ₁ to O ₄ of the CPU 1 to analog voltage Vs, TH is a thermistor for temperature detection,
VR is a variable resistor, and this thermistor TH and variable resistor VR are connected in series and inserted between the power supply +B and ground to convert temperature changes to voltage changes VT.
3 is a comparator that compares the output Vs of the D/A converter 2 and the voltage change VT caused by the thermistor TH, and 4 is a test switch that operates on/off.When the common and +B are connected, it enters the test state, and when the common and Shows normal condition when earth is connected. 5 is a 50Hz/60Hz changeover switch when configuring a clock, and the connection shown in the figure indicates the 50Hz state. 6 is an AC pulse that is the clock of the clock based on the commercial power supply 50Hz/60Hz. 7 is an analog switch, scan output terminal of CPU1
The signals indicated by reference numerals 4, 5, and 6 are turned on/off by the signal _S3 . K ₁ to K ₈ are function keys such as setting the clock, and 8 is a key matrix composed of the function keys and the output of the analog switch 7. These keys and switch information are sent to the signals of the scan output terminals S ₁ to S ₃ of the CPU 1. By CPU input terminal I ₁ ~ _{I 4}
It is taken in through.

9 indicates the main parts of the room air conditioner, 10 is a compressor, and 11 is an indoor fan.

Next, the operation of the present invention will be explained in detail with reference to the drawings.

First, let me explain about this stored program type room air conditioner control device.This control device has the functions of temperature thermostat, clock, timer on, and timer off _. ~ By operating _K8 , you need to set the temperature, clock, timer on, and timer off time. For example, in the case of temperature, turn on the temperature key _K4 , and the previously set temperature will be displayed on the display (not shown).
Operate key K ₆ and DOWN key K ₇ . Thereafter, the temperature is set by turning on the set key _K8 .

Similarly, clock key K ₅ and timer input key
Each time can also be set by operating the timer cut key _K2 and timer cut key _K3 .

When the above settings are completed and the on/off key _K1 is turned on, the air conditioner 9 starts operating. However, if the detected indoor temperature is below the previously set temperature, the output terminal _O6 of the CPU 1 will naturally generate an OFF signal and the compressor 10 will be stopped.

On the other hand, the above-mentioned temperature measurement normally consists of a software timer setting routine as shown in FIG. 3, and is carried out, for example, every 10 seconds.

This timing is shown in Figure 1 every 10 seconds.
The secondary digital information generated from the output terminal of the CPU 1 is converted into an analog voltage VS by the D/A converter 2 and compared with the voltage VT from the thermistor TH side. This comparison output is input to the analog switch 7, which is turned on/off by the scan output signal _S2 , and is taken into the CPU 1 at the scan timing.

The timing at which the above comparison output becomes “H” is:
This occurs when the output VS of the D/A converter 2 becomes larger than VT, and if the input taken into the CPU 1 is "L", the output terminal of the CPU 1 returns to the previous value.
A signal is output in a binary bit configuration of 1. This signal is converted into an analog voltage by the D/A converter 2,
The comparator 3 compares the voltage with VT again, and if the comparison output is "L", the same operation as above is repeated until it becomes "H".
When it becomes “H”, CPU1 stops the above +1 operation,
This converts the binary information into a decimal temperature and compares it with the previously set temperature.

Based on this comparison result, the compressor 10 is operated/stopped, that is, thermo-operated.

When the compressor 10 is stopped by the thermo-operation, a restart prevention timer for protecting the compressor is set for three minutes according to the setting routine shown in FIG. 2, and the timer operation is started. While this timer is operating, the compressor 10 will be stopped no matter what the temperature is.

Now, considering the clock used in one embodiment of the present invention, the clock takes in the AC pulse 6 shown in FIG. 1 and uses it as its basic clock. For this reason, a difference occurs in the count value between 50Hz and 60Hz, and in order to prevent such a difference, the 50Hz/60Hz changeover switch 5 shown in FIG. 1 is used to specify the Hz and correct the count value. Next, considering the timer operation operation, since the timer on time and time off time are stored in advance in the memory inside the CPU 1 by the user, the match between the clock and the timer time is determined, for example, when one minute increases. If the clock and the turn-on time match, the room air conditioner 9 starts operating. Further, if the clock and the off time match thereafter, the room air conditioner 9 stops operating.

The above-mentioned are the main control operations of a room air conditioner employing the stored program method.Next, we will explain how to check and adjust the operation of these control devices during testing. The timing (cycle) of temperature measurement described above is carried out every 10 seconds because the indoor temperature changes gradually.
Temperature adjustment (test) to compensate for variations in the thermistor TH by varying the variable resistor VR shown in the figure does not generate a measured value until 10 seconds later, so it takes time and is difficult to make accurate adjustments. In addition, when the compressor 10 is turned from on to off due to thermo-operation, a restart prevention timer is activated and the compressor is forced off for 3 minutes, so checks (tests) during thermo-movement are carried out every 3 minutes, which wastes time.

Furthermore, checking whether the timer is on or off is to ensure that it matches the time on the clock, so normally it takes the actual time to set the timer on or off.

In one embodiment of the present invention, the test switch 4 shown in FIG. 1 is provided to simplify the operation check during the above test. That is, the test switch 4 is connected to the power supply +B.
By turning on the CPU 1, the CPU 1 receives the scan signal _S3 to indicate that it is in a test state.

This test status signal is used in the internal routine of the CPU 1 to determine the constant set change during timer setting shown in FIGS. 2 and 3 (processing flow element shown by a diamond) and to This flag is used as a routine branching flag in the change determination section of the clock advance increments shown in the figures. In the change determination section indicated as "test" in these figures, when the flag is present, a test operation is performed. Since this is the case, the process branches to "Y", and when there is no flag, the process branches to "N" since it is normal operation.

Here, the aspect of the test according to the example of the present invention will be explained. When testing whether a stored program for temperature measurement operates normally, a temperature measurement timing signal for this purpose is generated as follows. That is, in the flowchart of FIG. 3, when the flag is present,
A branch is made to "Y" in the change determination section labeled "Test", and the 1 second setting for the test operation is set instead of the 10 second setting for the normal operation.

This creates a timing signal to measure the temperature every second, adjusts the variable resistor VR so that the actual correct temperature matches the temperature measured by the thermistor TH, and then checks whether it is working correctly or not. Tests such as checking can be easily performed.

Further, a check test to determine whether the thermo-operation operates correctly is carried out as follows. now,
In the flowchart of Figure 2, when there is a flag, a branch is made to "Y" in the change judgment section marked "Test", and instead of the 3 minute setting during normal operation, the 10 second setting during test operation is made. The settings are set. Therefore, the restart prevention period of the thermo-operation is fixed at 10 seconds, and as a result, a check test is conducted every 10 seconds to determine whether the thermo-operation is operating correctly.

Furthermore, a check test to determine whether the timer on operation and timer off operation operate correctly is carried out as follows. Now, when there is a flag in the flowchart in Figure 4, it is "Test".
A branch is made to "Y" in the change judgment section indicated as , and the operation equivalent to increasing the real time by 1 minute is performed by increasing the real time by 1 second.
The UP operation takes only 60 seconds, and the time required to match the timer on/off time is 1/60th of the time required for normal operation, greatly reducing the time required to check the timer operation.

As described above, according to the present invention, a timer control device using a stored program system includes a central processing unit that can selectively execute a normal operation routine and a test operation routine, and a predetermined external input to the central processing unit. A test switch is provided for inputting a test operation routine, and when an input instructing a test operation is input from the test switch to the central processing unit as the external input, the test operation routine is selected, and the test operation routine is selected. Since the setting time of the timer and the increments of the time progress in the normal operation routine of the software can be changed by this method, it is possible to simplify and speed up the testing and adjustment of the control device. According to the present invention, there is no need to prepare multiple types of clock signals in order to speed up the operation during the test operation, and the setting of the timer time interval etc. is done at the time of creating the required test operation routine. Effects such as being able to set it arbitrarily as desired can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a main block diagram showing the configuration of an embodiment of the present invention, Fig. 2 is a flowchart of a temperature measurement timer setting routine, Fig. 3 is a flowchart of a restart prevention timer setting routine, and Fig. 4 is a flowchart of a setting routine of a restart prevention timer. The figure is a flowchart of clock UP. 1 is a CPU, 2 is a D/A converter, 3 is a comparator, 4 is a test switch, 7 is an analog switch, 8 is a key matrix, 9 is a room air conditioner, and 10 is a compressor.

Claims (1)

[Claims] 1 A timer control device using a stored program method is provided with a central processing unit capable of selectively executing a normal operation routine and a test operation routine, and a test switch for applying a predetermined external input to this central processing unit. The test operation routine is selected when an input instructing a test operation is input from the test switch to the central processing unit as the external input, and the test operation routine
A timer control device characterized by changing the set time of a timer and the increments of time progression in a normal operation routine of software.