JPH06159777A - Air conditioning control device - Google Patents

Abstract

PURPOSE:To upgrade an air conditioner system without replacing a CPU unit by installing a plurality of control programs to the CPU unit and selecting and executing self control programs which can conform to control programs inherent to an arithmetic operation unit. CONSTITUTION:When a power source is turned on in an air conditioning device 1, an arithmetic operation unit 17a declares to a CPU unit 2, which provides a plurality of (for example, 16) control programs, that its own program is in conformity with an instrumentation type 16 by way of a shared memory 3. The CPU unit 2, which has received this declaration, selects a type which is conformity to an arithmetic operation unit 17a out of a plurality of control programs the CPU unit 2 holds and executes the selected program. The CPU unit executes wiring between input/output sources Di, Do, Ai and Ao connected to the CPU unit and the shared memory 3. Then, the input/output unit sources Do, Ai and Ao convert the transmitted data into a specific signal and output, thereby controlling the air conditioner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of an air conditioning control device used in an air conditioning control system.

[0002]

2. Description of the Related Art FIG. 3 is a diagram showing an outline of a general configuration example of an air conditioning control system. In the figure, the central monitoring system 10 and a plurality of gate blocks 12 are connected via a local bus 11, and the gate block 12 and a plurality of air conditioning control devices 14 are connected via a control bus 13. Among these, each gate block 12 transmits setting parameters from the central monitoring system 10 to each subordinate air conditioning control device 14, and transmits state monitoring information from each air conditioning control device 14 to the central monitoring system 10.

Each air conditioning controller 14 has one air conditioner 1
8 is connected, and the air conditioning control device 14 directly controls the air conditioner 18 based on a parameter (for example, set temperature) given from the central monitoring system 10. Then, each air conditioning control device 14 includes an input / output unit group (Di, Do, Ai, Ao, etc.) corresponding to each control target (thermometer, valve, fan, etc.) belonging to the air conditioner 18, and a communication unit 15. , CPU unit 16 and arithmetic unit 17, which are interconnected by an internal bus 19 as shown in FIG.

Such an air conditioning controller 14 (see FIG. 4)
The operation of is described below. The CPU unit 16 takes out the input data from the input / output units Di and Ai in a predetermined order, and transfers the input data to the arithmetic unit 17 via a shared memory (addresses for storing each data are determined) in the arithmetic unit 17. Hand over the data. Arithmetic unit 17
Performs a numerical operation based on the above-mentioned data group and the operation constant group such as the room temperature preset from the central monitoring system 10, and the resulting data group is passed through the above-mentioned shared memory in a predetermined order. , And returns it to the CPU unit 16. The CPU unit 16 sends the sent data group to predetermined input / output units Do and Ao, and the input / output units Do and Ao convert the sent data into predetermined output signals. , Output to the controlled object. The air conditioning controller 14 controls the air conditioner 18 by repeating the above series of operations at high speed.

However, the input / output unit group (Di, D
o, Ai, Ao, etc.) is not a single type depending on the scale of the air conditioner 18, but there are several types (4 types in FIG. 5) of combinations as shown in FIG. There are several types of instrumentation types (16 types in total in FIG. 5), and the arithmetic unit 17 has a unique control program (first in the shared memory) corresponding to those instrumentation types (combination of required input / output signals). Have different configurations). Therefore, the CPU unit 16 also fits the control program of the arithmetic unit 17 to be combined,
The number of different types (CPU unit 16) of control program types of the arithmetic unit 17 (number of instrumentation types) is different.
There is a control program type), and it is inconvenient that the CPU unit 16 must be replaced when the system is upgraded.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air-conditioning control device that can handle all types of arithmetic units with only one type of CPU unit. To do.

[0007]

An air conditioning controller according to the present invention, which is proposed to achieve the above object, comprises a programmable controller, an arithmetic unit, and an input / output unit, and a CPU unit of the programmable controller. The arithmetic unit calculates an input signal received from the input / output unit by the CPU unit via the internal bus of the programmable controller and a shared memory in the arithmetic unit, or the arithmetic unit calculates based on the input signal. In the air-conditioning control device that delivers the result, the CPU unit is configured to include a plurality of control programs and selectively execute its own control program so as to match the control program specific to the arithmetic unit. .

[0008]

In the air conditioning control device according to the present invention, when the power is turned on, the arithmetic unit declares its control program type to the CPU unit via the shared memory prior to the execution of the air conditioning control. . In response to this declaration, the CPU unit selects, from among the plurality of control programs that it holds, the one that is compatible with the control program declared by the above-mentioned arithmetic unit, moves to execution, and the input / output unit connected to itself. And the shared memory are wired. Therefore, even if the type of air conditioning control is different, it is possible to control multiple or all types simply by making a declaration from the arithmetic unit to the CPU unit, and no need to rewrite the program each time the air conditioning operation is different. Become.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing a configuration example of a first embodiment of an air conditioning control device according to the present invention. In the figure, 2
Is a CPU unit having a plurality of control programs (16 in this embodiment), 3 is a shared memory in the arithmetic unit 17a (interface between the CPU unit 2 and the arithmetic unit 17a), 15 is a communication unit, and 19 is an internal bus. , Di, Do, Ai, Ao are input / output units.

In the air conditioning control device 1 of this configuration, the instrumentation type 16 (full system) of FIG. 5 is used, and accordingly, the arithmetic unit 17a is selected so that the control program conforms to the instrumentation type 16. ing. In such an air conditioning control device 1, when the power is turned on, first, the arithmetic unit 17a confirms that its control program is suitable for the instrumentation type (combination of required input / output signals) 16. 3 (specify TYPE) to the CPU unit 2. In response to this declaration, the CPU unit 2 selects the type 16 suitable for the arithmetic unit 17a from the 16 control programs that it has and moves to execution, and the I / O unit groups Di and D connected to itself.
Wiring between o, Ai, Ao and the shared memory 3 is performed. The following operation is similar to that of the above-mentioned conventional example.

FIG. 2 shows a second embodiment of the air conditioning control device according to the present invention.
It is a figure showing an example of composition of an example of. In FIG. 2, FIG.
The same parts as those of are denoted by the same reference numerals, and the description thereof will be omitted.
In the figure, 4 is a shared memory (interface between the CPU unit 2 and the arithmetic unit 17b) in the arithmetic unit 17b. In the air-conditioning control device 5 having this configuration, the instrumentation type 1 shown in FIG. 5 is used, and accordingly, for the arithmetic unit 17b, the one whose control program conforms to the instrumentation type 1 is selected.

In such an air conditioning controller 5, when the power is turned on, first, the arithmetic unit 17b sets its control program to the instrumentation type (combination of required input / output signals) 1
The shared memory 4 (TYPE
Declaration) to the CPU unit 2 via CPU
In response to this declaration, the unit 2 selects the type 1 suitable for the arithmetic unit 17b from the 16 control programs that it has and moves to execution, and the input / output unit group Di, Do, connected to itself is selected. Ai, Ao and shared memory 4
Wiring with. The following operation is similar to that of the above-mentioned conventional example.

Here, comparing FIG. 1 and FIG. 2, as an example, in FIG. 1, the fourth slot is 8 to 1 in the Ai unit.
Data is stored in the fifth memory, and in FIG. 2, the fourth slot outputs the data of the 24-27th memory by the Ao unit. Even if the control programs of the arithmetic units 17a and 17b are different and the configurations of the shared memories 3 and 4 are different as in the first and second embodiments, the CPU
The unit 2 selects and executes a control program suitable for the control program of each of the arithmetic units 17a and 17b from 16 types of control programs owned by the unit 2, and the input / output unit group and the shared memory 3 connected to itself. , 4
Wiring with the CPU unit 2 is 1
Only one type can be used.

[0014]

According to the air conditioning control device of the present invention,
This type of CPU unit can handle multiple or all types of arithmetic units, so there is no need to replace the CPU unit when the system is upgraded, and initial errors such as incompatibility between control programs and input / output signals can also be detected. It will be easier.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of a first embodiment of an air conditioning control device according to the present invention.

FIG. 2 is a diagram showing a configuration example of a second embodiment of an air conditioning control device according to the present invention.

FIG. 3 is a diagram showing an outline of a general configuration example of an air conditioning control system.

FIG. 4 is a diagram showing a configuration example of an air conditioning control device.

FIG. 5 is a diagram showing an example of an air conditioning control device type (combination type of input / output units) and an instrumentation type.

[Explanation of symbols]

 1, 5 ... Air-conditioning control device 2 ... CPU unit 3, 4 ... Shared memory (configuration diagram of) 15 ... Communication unit 17a, 17b ... Arithmetic unit 19 ... Internal bus Di, Do, Ai, Ao ... I / O unit

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[Procedure amendment]

[Submission date] June 11, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

Claims (1)

[Claims] 1. A programmable controller, an arithmetic unit, and an input / output unit, wherein the programmable controller CPU unit and the arithmetic unit are connected via an internal bus of the programmable controller and a shared memory in the arithmetic unit. In the air-conditioning control device, the CPU unit delivers an input signal received from the input / output unit and a result calculated by the arithmetic unit based on the input signal, and the CPU unit includes a plurality of control programs. Then, the air conditioning control device is characterized by selectively executing its own control program so as to match the control program unique to the arithmetic unit.