JPS58195212A - Temperature controller - Google Patents

Abstract

PURPOSE:To change easily a target value without operating directly a target setter, by providing an auxiliary setter and an input means, which receives a command signal, besides the target value setter. CONSTITUTION:An operator 4 receives information from a temperature detector 1, which detects the temperature of a control object 9, to control the temperature of the object 9 to the set value of a target value setter 4. Besides the target value setter 4, an auxiliary setter 11 which sets a numerical value for the change of the set target value is provided. An external signal input part 12 which receives the command signal for the change of the target value from the external is provided. When the input part 12 receives the command signal, the target value is changed by the numerical value set by the auxiliary setter 11, and the temperature control is performed on a basis of the changed target value. Thus, the target value is changed easily without operating directly the target setter.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature regulator that controls the temperature of a controlled object so as to approach a set target value, for example.

Generally, the detected temperature signal of the controlled object is converted into a digital quantity by an AD converter and added to a digital arithmetic unit, and the digital arithmetic unit performs a predetermined calculation based on the temperature signal and a set target value, There is a temperature regulator that outputs an output operation amount based on the calculation result, adds it to the controlled object, and controls the temperature of the controlled object.

When using this type of temperature controller to control the room temperature, for example, the target value is changed because it is necessary to keep the control state at a light load in order to save energy at night or the like. In conventional temperature controllers, the target value was changed by nine people manually operating the target value setting device. Therefore, when changing the target value during the study night, it is necessary to go to the location where the temperature controller is installed and change the setting, which is extremely troublesome when there are a large number of temperature controllers.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the conventional temperature controllers described above and to provide a temperature controller that allows the target value to be easily changed without directly operating the target value setting device.

In order to achieve the above object, the temperature controller of the present invention provides a command signal for changing the target value from the outside to an auxiliary setting 'JfI for setting a numerical value for changing the target value in addition to the target value setting device. When the input means receives a command signal, the target value is moved and changed by the numerical value set by the auxiliary setting device.

The present invention will be described in detail below with reference to embodiments shown in the drawings.

FIG. 1 shows a diagram of a temperature controller in which the present invention is implemented. 1. It is a lock diagram. In the figure, reference numeral 1 denotes a temperature detector that constantly detects the temperature of the controlled object 9. This temperature:' The detector 1 is, for example, a thermocouple thermometer, a thermistor thermometer, or the like. Reference numeral 2 denotes an amplifier that amplifies the temperature signal detected by the temperature detector 1 to a specified level. The temperature signal detected by the amplifier 2 is taken into an AD converter processor 4. The target value is set by the setting device 5, and P, I-
Parameters such as the D constant are also set by the parameter setting device 6, and the target values are digital values, P, 1. The D constant etc. are set in an analog manner and are all taken into the arithmetic unit 4 via the AD converter 6. Arithmetic unit 4 detects the detected temperature.

A predetermined calculation is performed based on the target value, P/work/D constants, etc., and the output operation amount is outputted via the output operation section 8 to control the controlled object 9.
I am trying to control it to a set state. The output operation unit 8 is, for example, a driver.

The target 9 is, for example, a heating machine.

Alternatively, it may be formed using a cooler or the like. 7 is a display for displaying the detected temperature, for example. 10 is a display switch □”・,j Each time 747f- provided in the input processing unit 1 ade 13 is operated, the display 7 □ displays the detected temperature, and the target value and parameter □ value are incremented in steps. 11 is the target value setting.
An auxiliary setting device 12 is used to change (shift) the target value set by the constant device 5 to a fixed value, and 12 is an external signal input section that receives an external target value change command signal. Further, 15 is a target value change indicator light.

FIG. 2 shows the front panel of the temperature controller shown in FIG. In the figure, the same numbers as those shown in FIG. 1 indicate corresponding parts.

The setting device 5 for setting targets and values is composed of a four-digit thumb rotary switch, and the setting device 6 for setting P and ID constants is of a knob type. Further, the display 7 is composed of a 4-digit segment type LED. The auxiliary setting device 11 can be set to any numerical value from a positive value to a negative value, and the set value can be confirmed on the display 7. Note 1. Is O8 a switch button for switching display input? 14 is a power switch.

Next, an outline of the operation of the temperature controller configured as described above will be explained based on the general processing flow shown in FIG. 3 and the timer interrupt flow shown in FIG. 4. Note that the processing operations shown in FIGS. 6 and 4 are executed under the control of the arithmetic unit 4.

First, when the power switch 14 is turned on and the power is turned on, so-called initialization processing such as setting various registers in the computing unit 4 to 0 is performed (step 5T1).
). First, a temperature input process is performed, that is, the temperature detected by the temperature detector 1 is taken into the arithmetic unit 4 (ST2,
5T3). Next, the temperature was displayed (ST
4) After that, the process moves to target value setting processing. That is, the target value set by the setting device 5 is taken into the computing device 4 (ST5, 5T6
). Furthermore, various parameters set from the setting device 6 are also taken into the computing device 4 (ST7, ST8).

After each data from ST2 to ST8 is taken in, control calculation processing (ST
9), output calculation processing (STlQ), output operation processing (ST
11), sampling management processing (ST 12 ) is performed. Then, the cycle processing from ST2 to 5T12 is repeated at every sampling time.

In addition, the above-mentioned sampling time is also subject to timer interrupts shown in Figure 4 in very short time cycles, and display output processing (ST13), setting input processing (ST14), and output management processing are performed as necessary. (ST15) is performed.

Next, in addition to the general processing flow described above, a processing routine according to the present invention will be explained in more detail.

First, as shown in FIG. 5, a determination is made as to whether or not a shift signal exists (ST141) by a tie interrupt. Here, an external target value change command signal, that is, a shift signal is input to the external signal input section 1.
2 is added, the judgment becomes YES and the calculation unit 4
The shift set operation flag Fs built in is set (ST142), and the target value change indicator lamp 13 is turned on (ST145)+return to the normal processing flow.

If the shift signal is not applied to the external signal input section 12, the judgment at ST 141 will be qNO! The shift set operation flag F8 is set (ST144), and the target value change indicator light 15 is turned off (ST14).
5), after which the process returns to the normal processing flow.

Next, when the control calculation processing routine is entered in the normal processing flow,
First, the target value set by the target value setter 5 is read into a storage unit (not shown) built into the calculator 4 as setting 1 data (
ST91). Next, it is determined whether or not the shift set operation is performed by referring to the shift set operation flag Fs (5T92).
. If the shift set operation flag ps is set, the determination is YES, and the set value of the auxiliary setter 11 is read into the storage section of the arithmetic unit 4 (ST93). Then, it is determined whether the read auxiliary setting data is positive or negative. 5T94) If it is positive, the auxiliary setting data is added to the setting 1 data and the addition result data is obtained (5T95). If the auxiliary data is negative in ST94, the auxiliary setting data is subtracted from the setting 1 data to obtain persimmon fruit data (ST96).

5Following the processing operation in T95 or ST96, the addition result data or subtraction result data is stored as a changed target value (ST97) + Subsequent immersion control calculation processing proceeds with this changed target value (ST9B) .

If the shift set operation flag Fs is reset in ST92, that is, if the target value change command has not been issued, the determination is No, and the operation flow moves to 5T97 where the setting 1 data, that is, the number set by the target value setting device 5 is determined. is stored as the target value.

Thereafter, control calculation processing proceeds based on the target value (ST9
8).

Now, assuming that the temperature controller of the above embodiment is used for room temperature control, the auxiliary setting device 11 is set in advance to a negative suitable value. Temperature control is performed as is.

In this case, as described above, the target value change indicator light 13 is off. At night, turn on the external remote control
A target value change command signal is applied to the external signal input section 12, and the value set by the target setter 5, that is, setting 1.
The auxiliary setting data value set by the auxiliary setting device 11 is subtracted from the data, and temperature control is performed using the subtraction result value as a changed target value. In this case, target value change indicator light 1
5 is lit, and at this point the operator can know that temperature control is being performed based on the changed target value. At this point, if you want to know the target value set by the target value setting device 5, press the switch button 10 for switching display input.
By pressing S, the target value can be displayed on the display 7, which normally displays the detected temperature, instead of the detected temperature.

When the night turns to the next morning, the external target value change command signal is turned OFF, that is, the L signal, the @ target value change indicator light 13 goes out again, and the target value set by the target value setter 5 is changed. Temperature control will be performed based on the target value.

According to the temperature controller of the present invention as described above.

In addition to the target value setter, it is equipped with an auxiliary setter for setting numerical values for changing the target value, and an input means for receiving a command signal for changing the target value of an external device.

When this input means receives a command signal, the target value is moved and changed by the value set by the auxiliary setting device, and the temperature is controlled based on the changed target value.

When changing a predetermined value from the target value set by the target value setter, it can be done remotely without having to go through the trouble of operating the target value setter, making it possible to change the target value without much effort. can. This effect is particularly significant when there are a large number of temperature controllers whose target values are to be changed, since they can be changed simultaneously using the target value change command signal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a temperature controller in which the present invention is implemented, FIG. 2 is a diagram showing one screen panel of the temperature controller shown in FIG. 1, and FIG. 3 is a diagram of the temperature controller shown in FIG. 1. FIG. 4 is a diagram showing the general processing flow, FIG. 4 is a diagram showing the timer interrupt processing flow, FIG. 5 is a diagram showing the timer interrupt processing flow according to the present invention, and FIG. 6 is the control calculation processing routine according to the present invention. FIG. 1: Temperature detector, 4: Arithmetic unit, 5: Target value setter, 6: Parameter setter, 7: Display,
8: Output operation door 7: 9: Control target. , '1.1 11: Auxiliary setting device, 18: Target value change indicator light. 12: External signal Tachibe, "" Fs: S/73-h operation η Ku patent applicant Tateishi Electric Co., Ltd. agent
Patent Attorney Shigeru Nakamura 58- '$2 Figure

Claims (1)

[Claims] (1) means for detecting the temperature of the controlled object, means for setting a target value, a calculation section for performing a predetermined calculation based on the temperature detected by the temperature detection means and the target value from the target value setting means; an auxiliary setting for setting a numerical value for changing the target value set by the target value setting means in the temperature controller including an output operation section that outputs a predetermined operation amount to the controlled object based on the calculation result of the calculation section; With means. and input means for receiving a command signal from the outside for changing the target value, and when the command signal is received by the input means, the target value is changed by the numerical value set by the auxiliary setting means, A temperature regulator that controls the control target.