JPH0933301A - Monitor signal output device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily read out memory data of an apparatus. SOLUTION: Data desired to be monitored in the memory 26 of an apparatus is specified by a readout data specification section 28. A data readout section 30 reads out specified data from the memory 26. A D/A data conversion section 35 utilizes conversion data between data values and voltage values stored in a conversion data memory 33 in advance, converts the data read out from the data readout section 30 into an analog voltage, and outputs it to a D/A port 36. The voltage of the D/A port 36 is detected by a tester, and the data value of the readout data is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitor signal output device for monitoring data stored in an operating memory.

[0002]

2. Description of the Related Art A device status display device for monitoring and displaying data stored in a memory of an operating condition is disclosed in Japanese Patent Laid-Open No. 3-27162.
No. 1 publication. This device is a memory RAM loaded by the control operation of the sequence control unit of the device.
Memory data of (Random Access Memory) is read from the microcomputer side of the device to the status display device side by an address command, and this is displayed by distinguishing between normal and abnormal by using a display means such as an LED provided in the status display device. Is.

[0003]

However, in the above-mentioned conventional device, the microcomputer side of the equipment reads the state display device side to the state display device side in the signal state of the microcomputer treatment form, and associates the read data with the one-to-one correspondence. Since it is displayed on an LED or the like, it is necessary to provide a large number of display means such as LEDs corresponding to the number of data to be monitored, which causes a problem that the device configuration becomes complicated.

Further, since the data read from the device side is taken out as a signal in the form of microcomputer processing, even if a general-purpose tester or oscilloscope is connected to the signal output port on the microcomputer side, the signal output from the signal output port will not Since it is a digital signal, these testers and oscilloscopes do not know the value of the read data, so there is the inconvenience that a dedicated status display device must be prepared.

The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a tester, an oscilloscope, etc. from the signal output port side of the microcomputer of the equipment without preparing a dedicated status display device. It is an object of the present invention to provide a monitor signal output device capable of easily detecting the value of monitor data by using the general-purpose inspection means.

[0006]

In order to achieve the above object, the present invention is constructed as follows. That is, according to the present invention, in a monitor signal output device that reads out and outputs data in a memory that stores operating state data, a read data designating unit that designates data to be monitored, and data designated by the read data designating unit. A data reading unit for reading the data from the memory, a conversion data memory to which conversion data for converting a data value into a voltage value is given for each data to be monitored, and the data reading using the conversion data of the conversion data memory And a D / A data conversion unit for converting the data read by the unit into an analog voltage, and a D / A port for taking out the analog voltage converted by the D / A data conversion unit to the outside. Is configured as.

In the present invention having the above-mentioned structure, by designating the data to be monitored by the read data designating section,
The data reading unit reads the specified data from the memory and adds it to the D / A data conversion unit. D /
The A data converter uses the converted data stored in the converted data memory to convert the read digital data value into an analog voltage and output it to the D / A port.
By connecting a general-purpose tester or oscilloscope to this D / A port, the voltage corresponding to the read data is detected from the D / A port.
By simply detecting the output voltage of the / A port, various read data values to be monitored can be known.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a hot water heater as an example of a combustion device including the monitor signal output device of the present embodiment. In FIG. 1, a tool main body 2 is housed in a tool case 1. A burner 4 of a combustion surface switching type is provided below the combustion chamber 3 of the apparatus main body 2, and a combustion fan 5 for air supply and exhaust is provided below the burner 4. The box-shaped nozzle holder 6 is provided with a nozzle for jetting gas to the burner 4, and the nozzle holder 6 is provided with capacity switching valves 22a, 22b, 22c for switching the burner combustion surface (switching the burner combustion capacity). Is connected to a gas supply passage 7, and fuel gas is supplied through the passage 7. The gas supply passage 7 incorporates an original electromagnetic valve 8 for opening and closing the passage and a proportional valve 10 for controlling the amount of gas supplied to the burner 4 by the opening amount.

A passage 24 is formed between the air chamber 9 below the burner 4 and the combustion chamber 3 above the burner by piping or the like, and the passage 24 is formed from the combustion fan 5 to the burner. An air volume detection sensor 23 for detecting the air volume supplied to the air conditioner 4 is provided.

The air volume detection sensor 23 is constructed by using a hot wire type wind velocity sensor, a Karman vortex type wind velocity sensor, a differential pressure sensor and the like.

A hot water supply heat exchanger 11 is installed above the combustion chamber 3, and a water supply pipe 12 is provided at the inlet side of the hot water supply heat exchanger 11.
Is connected, and a hot water supply pipe 13 is provided on the outlet side of the hot water supply heat exchanger 11.
Is connected. The water supply pipe 12 is provided with an incoming water temperature sensor 14 for detecting the temperature of incoming water and a flow rate sensor 15 for detecting the flow rate of incoming water.On the hot water supply pipe 13 side, a tapping temperature sensor 16 for detecting the temperature of incoming hot water, A water amount control valve 19 to be adjusted is provided.

In the figure, 18 is an igniter electrode (ignition plug) for igniting fuel gas, 20 is a flame rod electrode for detecting the flame of the burner 4, 21 is a Hall IC for detecting the rotation of the combustion fan 5, etc. A fan rotation detection sensor, 27 is an air temperature sensor attached to the nozzle holder 6 to detect the air temperature inside the appliance, and 51 is an outside air temperature sensor.

The combustion operation of this kind of equipment is carried out by a control device 17, which is usually connected to a remote controller for setting the hot water supply temperature and displaying the set temperature. There is. The combustion device 17 is, as shown in FIG.
It has a combustion control unit 25 and a memory 26 such as a RAM or a non-volatile EEPROM or the like in which data can be freely written and erased by electric signals. The memory 26 is used for various sensors.
The detection data of 14, 15, 16, 20, 21, 23, 27, 51, etc., the combustion fan 5, various valves 8, 10, 19, 22a to 22c, the operating state of various activators such as igniters, etc. Data, data of various switches, data from remote control (set temperature, time), error code life diagnosis data, set water level or P (water level) of bathtub-Q (water amount) in the case of a multifunction machine to be described later Data and the like are fetched every moment during the operation of the combustion operation and stored. The combustion control unit 25 has a built-in sequence program, reads the data in the memory 26 according to the sequence program for combustion operation, and controls the combustion operation as follows.

First, when a hot water tap (not shown) provided on the tip side of an external hot water supply pipe connected to the hot water supply pipe 13 is opened, water enters from the water supply pipe 12 and the flow of this water is detected by the flow rate sensor 15. When detected, the combustion control unit 25 of the control device 17 rotates the combustion fan 5 to detect the fan rotation detection sensor.
After confirming that the fan rotation has been detected by the fan 21 and the air volume detection sensor 23 has detected the air volume, the discharge of the igniter electrode 18 is started.
Then, the main solenoid valve 8, the performance switching valves 22a to 22c, and the proportional valve 10 are opened to perform burner ignition. Frame rod electrode 20
Has detected the flame, open / close the capacity switching valves 22b and 22c according to the combustion capacity, and control the valve opening drive current of the proportional valve 10 so that the hot water temperature reaches the set temperature. In order to control (the valve opening amount of the proportional valve 10) and to supply the air corresponding to the gas supply amount, the rotation of the combustion fan 5 or the air volume control is performed.

When the hot water is used up and the hot water tap is closed, the passage of water to the hot water supply heat exchanger 11 is stopped, and when the stop of the flow of water is detected by the signal of the flow sensor 15, each valve 8 , 22a to 22c, 10 are closed, and after that, when a post-purge period in which exhaust of exhaust gas in the combustion chamber 3 ends is completed, the rotation of the combustion fan 5 is stopped to prepare for the next hot water discharge.

Monitor signal output device in this embodiment
As shown in FIG. 1, 37 comprises a read data designating section 28, a data reading section 30, a conversion data memory 33, a D / A data converting section 35, and a D / A port 36. There is.

The read data designating section 28 designates the data to be monitored among the data stored in the memory 26 by instructing the storage address of the data. The read data designating unit 28 can be configured by a key input means using a keyboard, a jumper line cut, or the like, but in the present embodiment example, a dip (DIP) switch is provided on the control board of the control device 17, The data reading unit 30 is instructed to monitor the data by operating the dip switch. Data reading section
The read unit 30 reads the data designated by the read data designation unit 28 from the memory 26 and adds it to the D / A data conversion unit 35.
Table 1 shows an example of the read target data.

[0018]

[Table 1]

The D / A data conversion unit 35 is a data reading unit.
The data read at 30 is converted into an analog voltage using the conversion data stored in the conversion data memory 33.
The conversion data stored in the conversion data memory 33 can be set in an appropriate manner, and for example, the data value may be set so that the data value becomes an easily understandable value. In this case, for example, the hot water supply burning time About 200 hours 1
V, 1000rpm (1 for the rotation speed of the combustion fan
1 V per 1000 revolutions per minute), temperature data 1 V per 20 ° C., flow rate sensor detected flow value 1 V per 10 liters, or read 16
Binary (00 to FF) data values are divided into 256 decimal steps and assigned. For example, the burning time of hot water supply is increased by 1 step every 4 hours. 00) to 0V and 5V to the 256th stage (hexadecimal FF). Hexadecimal data read from the memory 26 is allocated to the decimal stages 1 to 256. The assigned data value may be given in the form of conversion data for converting it to a voltage value by proportional calculation, and the conversion data of the read data value and the analog voltage value is set in an appropriate form according to the specifications and stored in the conversion data memory 33. Given.

The D / A data converter 35 uses this converted data to arithmetically convert the digital read data value added from the data read unit 30 into an analog voltage and output it to the D / A port 36.

Therefore, in this embodiment, by connecting a tester or an oscilloscope to the D / A port 36, the analog voltage corresponding to the read data value is detected, and the data value monitored from this analog voltage is detected. Will be obtained. For example, if the converted data is given to the converted data memory 33 in the relationship of 1 V per 1000 rpm of the fan rotation speed, the D / A port 36 to 3 can be used.
When the analog voltage of V was detected, it was immediately detected that the read data of the combustion fan was 3000 rpm, and the conversion data was converted from hexadecimal to decimal 25.
If the data is assigned in 6 steps and the conversion data is given in the form of stepping up every 4 hours by 1 step, for example, when 0.3 V is detected from the D / A port 36, the total hot water combustion time is The 60 hours will be immediately detected.

FIG. 3 is a system configuration diagram schematically showing combustion equipment of a bath / hot water supply complex machine. In this bath / hot water supply complex machine, a hot water supply mechanism 54 and a reheating mechanism 55 are connected via a pouring mechanism 56. The components of the hot water supply mechanism 54 that perform hot water supply combustion are configured in the same manner as the water heater shown in FIG. 2, and the reheating mechanism 55 is a circulation pump 53 incorporated in the reheating circulation path 29 connected to the bathtub 52. Driving a bath
When the hot and cold water in 52 is circulated, and when this circulating hot and cold water passes through the reheating heat exchanger 57, it is heated by the combustion heat of a bath burner (not shown) to reheat the hot water in the bathtub.

The pouring mechanism 56 includes the hot water supply pipe 13 and the reheating circulation path 29.
There is a pouring passage 41 connecting the pouring passages, and a pouring electromagnetic valve 42, a negative pressure closing valve 43, and a check valve 44 are provided in the pouring passage 41. In addition, 39 is a hot water supply confirmation switch that detects the hot water supply state, 45 is a pressure sensor that detects the water level of the bathtub 52, 46 is a hopper tank, 47 is a tank drainage passage, 48 is a check valve, 49 is a tank drainage solenoid valve, and 50 is Two-way valve and 58 are bath temperature sensors, respectively.

In this type of equipment, the pouring electromagnetic valve 42 is opened as shown in FIG. 3 (a), so that the hot water produced by the hot water supply heat exchanger 11 is passed through the pouring passage 41 and the reheating circulation passage 29. It can be dropped into the bathtub 52 for filling.
Further, as shown in (b) of the figure, the two-way valve 50 is switched to the tank drainage passage 47, the tank drainage solenoid valve 49 is opened, and the circulation pump 53 is turned on, so that the hot water in the hopper tank 46 is removed from the bathtub 52. Drained to the side. In this bath / hot water supply complex machine, in addition to the data monitoring on the hot water supply mechanism side shown in Table 1 above, the data monitoring on the bath side as shown in Table 2 is similarly performed.

[0025]

[Table 2]

According to this embodiment, the data read from the memory 26 is converted into an analog voltage and output to the D / A port 36, so that a dedicated status display device like the conventional example is prepared. There is no need to do it, and the data value can be judged by simply detecting the voltage of the D / A port 36 using a general-purpose tester or oscilloscope. Especially, the inspection and inspection of each data at the site where the combustion equipment is installed. In this case, the work becomes extremely easy, and moreover, it becomes possible to make the detection judgment of the data value quickly and accurately.

Moreover, a plurality of LEDs are provided in a one-to-one correspondence with each data to be monitored, as in the conventional status display device.
It is not necessary to provide display means such as
The data value can be determined only by applying it to the / A port 36, and even a worker who does not require skill can easily make a detection determination of the read data, which is a revolutionary effect.

The present invention is not limited to the above-mentioned embodiment, and various embodiments can be adopted. For example,
In the above-described embodiment, as the combustion equipment, the single-function water heater as shown in FIG. 2 (a water heater having only a hot water supply function) and the bath / hot water combined machine shown in FIG. 3 have been described. In addition, it is also applied to various combustion equipment such as a burner combustion type heater, air conditioner, air conditioner, air conditioner, etc. In addition to the combustion equipment, it can also be applied to home appliances, cars (vehicles), etc. Also applies.

[0029]

According to the present invention, the read data from the memory of the device is converted into an analog voltage and output to the D / A port on the output side. Simply connect the voltage detection end of a general-purpose tester or oscilloscope to the A port, and the D / A
It is possible to detect the analog voltage of the port, which makes it possible to easily and accurately detect the read data value and its normality / abnormality.

As described above, according to the present invention, it is not necessary to prepare a dedicated status display device as in the conventional example, data to be monitored is designated, and a general-purpose tester or the like is simply applied to the D / A port. It is possible to detect the data value and to judge whether it is normal or abnormal by just detecting the data value.In particular, at the site where the device is installed, operate the device to detect the data value stored in the memory of the device and check it. It is very convenient for performing inspections, and even an operator who does not need to be skilled can easily detect the data value and determine whether the data value is normal or abnormal with accuracy.

Further, in the present invention, since the analog voltage of the read data can be detected from the common D / A port,
Unlike the state display device of the conventional example, it is not necessary to provide a large number of display means such as LEDs corresponding to the type of data to be read, and the utility value thereof is extremely high.

[Brief description of drawings]

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

FIG. 2 is a system configuration diagram of a water heater equipped with the device of the present embodiment.

FIG. 3 is a schematic system diagram of a combined bath / hot water supply system.

[Explanation of symbols]

 26 Memory 28 Read data specification unit 30 Data read unit 33 Converted data memory 35 D / A data conversion unit 36 D / A port 37 Monitor signal output device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location G08C 15/00 G01R 31/28 B (72) Inventor Naoki Obayashi 3-4, Mikamidai, Yamato-shi, Kanagawa House number in Gaster Co., Ltd.

Claims (1)

[Claims] 1. A monitor signal output device for reading and outputting data in a memory storing data of operating states, and a read data designating section for designating data to be monitored and data designated by the read data designating section. A data reading unit for reading from the memory, a conversion data memory to which conversion data for converting a data value into a voltage value is given for each data to be monitored, and the data reading unit using the conversion data of the conversion data memory A monitor signal output device having a D / A data conversion unit for converting the data read by the device into an analog voltage and a D / A port for taking out the analog voltage converted by the D / A data conversion unit to the outside. .