JPH02183306A - Controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of the Invention) The present invention compares an input signal obtained by measuring a controlled object, such as a temperature controller, with a preset operating range, and generates an alarm. This invention relates to a control device that outputs signals such as.

(Summary of the Invention) This invention provides a control device that outputs an alarm signal, etc., by setting a proportional output band continuously in the operating range that outputs the alarm, so that the value of the input signal changes within the operating range that outputs the alarm. It is possible to output the relative level as an intermediate value signal.

(Prior art and its problems) Conventionally, in this type of control device, as in the temperature controller shown in FIG. The lower limit temperature is set as AL. Therefore, during operation, an alarm signal of "1" or "0" is output depending on whether the value of the temperature signal obtained by measuring the controlled object is within the set operating range.

In a temperature controller configured in this way, when the temperature of the object to be measured frequently fluctuates up and down, simply outputting an alarm signal of "1" or 0 will not allow the current temperature to reach the upper limit of the operating range. How far is it from the lower limit temperature AL?
Or, it is not possible to directly determine whether it is close. Therefore, the user has to compare the measured temperature displayed on the display panel with the set temperature and grasp the situation from the difference between the two, which is unsatisfactory in terms of usability.

(Object of the invention) This invention was made to solve the above problem, and its purpose is to determine the relative level of the input signal value to the operating range for outputting an alarm. The object of the present invention is to provide a control device that can output signals.

(Structure and Effects of the Invention) In order to achieve the above object, the present invention compares an input signal obtained by measuring a controlled object with a preset operating range, and outputs a signal such as an alarm. In the control device, a means for inputting a starting point of a proportional output band that is continuously set in an operating range, a means for storing starting point data input from this means, and a starting point stored in this storage means. means for comparing the data and the measurement input signal and, if the value of the input signal is included in the proportional output band, outputting a proportional signal according to the level of the input signal in the proportional output band; shall be.

According to this invention, the input measurement signal is compared with the proportional output band continuously set in the operating range for outputting the alarm, and if the value of the input measurement signal is included in the proportional output band,
By outputting a proportional signal according to the level of the input measurement signal in the proportional output band, the relative level of the input measurement signal value to the operating range that outputs the alarm is output as an intermediate value signal. Ru.

As a result, it becomes possible to grasp trends in changes in the state of the controlled object, and the trouble of comparing measured values and set values on the display panel is eliminated.

Furthermore, the output intermediate value signal itself can be used as an output driving signal. In that case, more precise control becomes possible.

(Description of Examples) Hereinafter, examples in which the present invention is applied to a temperature controller will be described.

FIG. 1 is a block diagram showing the electrical configuration of the temperature controller.

As shown in the figure, this temperature controller has a microcomputer 1
It is mainly composed of.

A measurement signal from a temperature sensor (not shown) is input to an input circuit 2, amplified by an amplifier circuit 3, converted to a digital signal by an A/D conversion circuit 4, and then input to the microcomputer 1.

From the key input circuit 7, changes in set values and the like are inputted by key operations.

In the microcomputer 1, by executing the built-in program based on these input data,
Various control operations are performed as a temperature controller.

As output from the microcomputer 1, signals representing the measured temperature and set value are output to the display drive circuit 11, and these values are digitally displayed on the display 12.

As other outputs, signals for driving or stopping external equipment are output to the output circuit 5, and signals for outputting alarms such as buzzer sound and lamp lighting are output to the alarm output circuit 6.

Furthermore, power for driving the microcomputer 1 and the like is inputted via a power supply circuit 9 and a reset power failure detection circuit 10.

FIG. 2 is a layout diagram of the display panel 13 corresponding to the display 12. As shown in FIG.

As shown in the figure, this display panel 13 includes a liquid crystal display section 14 that numerically displays the current measured temperature, a liquid crystal display section 15 that displays setting values input by key operation, and a liquid crystal display section 15 that displays setting values input by key operations. A mode key 16 for inputting operations, an up key 17, a down key 18, and an indicator light 19 for displaying an intermediate value alarm are arranged.

In this embodiment, 480 degrees is set on the liquid crystal display section 15 as the alarm setting value, and if the current temperature displayed on the liquid crystal display section 14 exceeds 480 degrees, an alarm is output.

Also, the reason why the two left side indicator lights 19 are lit is because, for example, in order to output an intermediate value, 30 degrees is specified as the low temperature side of 480 degrees as the proportional output band, that is, 450 degrees is the starting point and up to 480 degrees. If the range between 1 and 2 is set as a proportional output band, the input current temperature level will be displayed on the indicator light 19 as two lights. In the figure, one light on corresponds to 0% of the power per month, which indicates that the current temperature is at a level of 20% in the proportional output band. Also, if all 10 lights are lit, it indicates that the output is 100%, that is, "1" is being output, and if none of the lights are lit, the output is O.
%, that is, "O" is output.

FIG. 3 is a diagram showing the configuration of the operating range and proportional output band set for this temperature controller.

In the figure, "1" is placed on the line representing the temperature as a signal such as an alarm.
The conventional operating range where 0 to 1 is output and the proportional output band range where intermediate values from 0 to 1 are output are indicated by diagonal lines.

This proportional output band is set adjacent to the operating range in which "1" is output by inputting the starting point AL in advance.

In this proportional output band, the current temperature value input from the temperature sensor via the input circuit 3 is at levels T11, T5□,
Discriminated by T, 3, 25%, 50%, 75 respectively
Output as an intermediate value of %.

The display light 19 shown in FIG. 2 displays the output obtained by further setting this discrimination level in 10% increments on the panel of the device.

Next, the operation of this temperature controller will be explained based on the flowchart shown in FIG.

This flowchart only describes input of proportional output band starting point data in the proportional output band informal determination mode and alarm output processing in the operation mode.

First, it is checked whether or not the mode is the proportional output band setting input mode. If the mode is the setting mode (step 41Y), the starting point data of the proportional output band inputted by key operation etc. is stored in the memory (step 41Y). 42-43).

If it is not the setting mode but the operation mode (step 41N
, 44Y), it is checked whether the current temperature input via the input circuit 2 from a temperature sensor (not shown) is within the operating range of "1" output set in advance by another input process ( Step 45).

If the current temperature is within the operating range for outputting "1" (step 45Y), an alarm signal "1" is output from the alarm output circuit 6 (step 46).

If the current temperature is not within the operating range of "1" output (step 45N), it is checked whether the current temperature is within the proportional output band by referring to the starting point data stored in the memory in step 43. (step 47).

If the current temperature is within the proportional output band (step 47Y),
The alarm output circuit 6 outputs an alarm signal whose level is adjusted to an intermediate value (step 48).

If the current temperature is not within the proportional output band (step 47N)
, an alarm signal "0" is output from the alarm output circuit 6 (step 49).

By repeating these processes, in addition to the conventional alarm outputs of "1" and "0", an intermediate value output is obtained, which is a relative level of the input measurement value to the operating range. The obtained intermediate value is displayed by the number of lighting indicators 19 shown in FIG. 2, etc.

Note that as a method of displaying the intermediate value output, a percentage value or the like can be directly displayed on the liquid crystal display section 14 or 15, or the output can be notified by the volume or tone of a buzzer.

Furthermore, as an output form of the intermediate value signal obtained from the proportional output band, in addition to the above, the level of the input value in the proportional output band can also be expressed as a duty ratio.

In that case, assuming that the duty ratio of the output signal is D, the starting point of the proportional output band is AL, the width of the proportional output band is PA, and the current temperature PV, the duty ratio is as follows.

D-(PV-AL)/PA As a result, when the proportional period of the output signal is CPA, in the proportional period CPA, the period of CPAxD is an on-output, and the period of CPAX (1-D) is an off-output.

Furthermore, as another output form, the level of the input value in the proportional output band can be output as an analog signal. In other words, TA is the maximum and minimum values of analog signals output as current and voltage levels.

Assuming TR, the level T of the analog signal output in the proportional output band is as follows.

T - (TB Ta) realizable.

In the above embodiment, the proportional output band is set at the lower limit of the operating range, but it can be set at the upper limit as well.

In addition, although the temperature controller has been described in the embodiment, control devices that output signals such as various alarms based on measurement value signals obtained from various measurement means other than temperature measurement are also described.
The same can be applied.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the electrical configuration when this invention is applied to a temperature controller, Fig. 2 is a layout diagram of the display panel 13 corresponding to the display 12 in Fig. 1, and Fig. 3 is the operation. FIG. 4 is a flowchart showing the operation, and FIG. 5 is a diagram showing the structure of the operating range in a conventional example. 1... Microcomputer 2... Input circuit 3... Amplifier circuit 4... A/D conversion circuit 5... Output circuit 6. ...Alarm output circuit 7 ...Key input circuit 9 ...Power supply circuit 0 ...Reset power failure detection circuit 1 ...Display drive circuit 2 ... Display unit 3 ... Display panel 4 ... Liquid crystal display section 5 ... Liquid crystal display section 6 ... Mode key 7 ... ...Up key 8...Down key

Claims (1)

[Claims] 1. In a control device that compares an input signal obtained by measuring a controlled object with a preset operating range, and outputs a signal such as an alarm, continuously within the operating range. means for inputting the starting point of the proportional output band to be set; means for storing the starting point data input from this means; comparing the starting point data stored in the storing means with the measurement input signal; A control device comprising: means for outputting a proportional signal according to the level of the input signal in the proportional output band when the value of the input signal is included in the proportional output band.