JPH05231703A - Centralized controller for refrigeration air conditioner - Google Patents

Abstract

PURPOSE:To operate even memories having different data normally by providing the inside of a maintenance controller with an exchangeable RAM card, a RAM-card presence discriminator, a means writing pages to the RAM card by the result of discrimination and deciding the number of the pages of the RAM card and a RAM-card usage determination means. CONSTITUTION:A micro-computer 8 is provided with a RAM-card mounting presence discriminating means 23, a RAM-cad page-number decision means 24 and a RAM-card usage determination means 25. When the exchange of the RAM-card mounting presence discriminating means 23 by a RAM card is detected and the abnormality of the RAM card is detected, the RAM-card page-number decision means 24 writes pages in the page writing area of the RAM card 13 on the basis of the initial value of the RAM card 13, and decides the number of pages of the card. Consequently, the RAM-card usage determination means 24 determines the usage of the card. Accordingly, data usage is detected easily even in memories having different data and the memories are operated normally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centralized control device for a refrigerating and air-conditioning machine for detecting a failure in an air-conditioner refrigerating machine and performing preventive maintenance.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram of a conventional centralized control device for a refrigerating and air conditioning system. 1 is a split-type air conditioner outdoor unit (indoor unit omitted) or refrigerator outdoor unit (indoor unit omitted), 2 is an analog input part that takes in various sensor values that need to be managed by the above unit, and 3 is the same as above. A digital input unit that detects a necessary digital input, 4 is a digital output unit that performs a digital output that needs to be managed in the same manner as above, and 5 is a maintenance controller equipped with a large-capacity memory that collects, stores and variously manages data at regular intervals. Reference numeral 7 is a personal computer for performing various initial settings and displaying received data, and 6 is a multiplex transmission line for transmission between the maintenance controller and the personal computer.

FIG. 5 is a block diagram of a conventional maintenance controller. 8 is a read-only memory for writing a program, a microcomputer equipped with a read-write memory for temporarily storing data, 9 is a transmission unit for transmitting with a personal computer, 10 is an analog that captures analog values of various sensors An input unit 11, a digital input unit for taking in various digital values, 12 a digital output unit for operation control, and 13 a RAM card for storing and reading data.

Next, the operation will be described. RAM card 1 for analog and digital values detected by various sensors after initial setting on a personal computer at fixed intervals
3, digital output depending on the condition of initial setting value,
Control and report by multiplex transmission. RAM stored
When replacing the card, replace it with a RAM card of the same capacity and specifications, analyze the operation status, and perform preventive maintenance of the refrigerating and air-conditioning system, regular checkups, and failure diagnosis.

In Japanese Utility Model Laid-Open No. 61-155961, the capacity of the RAM is checked when the power is turned on, and the change in the mounted state of the RAM is detected and displayed when the power is turned on. Technology is disclosed.

[0006]

A conventional centralized control device for a refrigerating and air-conditioning apparatus normally stores data in a RAM card when a RAM card of different capacity is attached at the time of initial start-up and replacement of the RAM card in a maintenance controller. There was a problem that it could not be collected.

The present invention has been made to solve the above-mentioned problems, and even when a RAM card having a different capacity is attached at the time of initial startup and when the RAM card is replaced,
An object of the present invention is to obtain a centralized control device for a refrigerating and air-conditioning machine that can judge the number of cards with or without RAM cards, judge the amount of cards used, and normally collect data in the RAM cards.

[0008]

A central control device for a refrigerating and air-conditioning apparatus according to the present invention collects, stores, in a constant cycle, operating conditions of an air-conditioning apparatus and a refrigerator and data necessary for various operations.
And a maintenance controller having a large-capacity memory for managing various types, a replaceable RAM card provided in the maintenance controller, and the RA
A discriminating device for discriminating the presence / absence of the M card, a unit for writing a page in the page writing area of the RAM card according to the result of the discriminating device, and a unit for determining the number of pages of the RAM card, and the RAM based on the result of the determination. And a means for determining the usage amount of the card.

[0009]

The central control unit for the refrigerating and air-conditioning apparatus according to the present invention first writes the initial value in the RAM card, writes the page in the page writing area for each page of the RAM card, judges the maximum page, and determines the maximum value of the RAM card. Determine the amount used.

[0010]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a RAM card usage amount detection unit. In the figure, 23 is a means for determining whether or not an RMA card is installed, 24 is a means for writing a negative in the page writing area of the RAM card according to the result of this determining means, and is a means for determining the number of pages of the RAM card, and 25 is this page. It is a usage amount determining unit that determines the usage amount of the RAM card based on the determination result of the number determining unit 24.

Next, the operation will be described with reference to the flowchart of FIG. When the maintenance controller power is turned on, R
When it is detected that the AM card has been replaced, and RA
If there is something wrong with the M card, RAM in step 16
The initial value is written in the card, and the data of each page is read in step 17. It is determined whether the data read in step 18 is the initial write value, the maximum page is determined, and if it is not the maximum page, the page data is written in the RAM card in step 19 and the number of pages in the RAM card is determined in step 20. Done in. Repeat this up to the maximum page, step 21
Determines the RAM card usage.

Example 2. In the above embodiment, the case of the centralized control device for the refrigerating and air-conditioning apparatus has been described. However, if the controller is equipped with a RAM card, a transmission input / output unit may be provided instead of the analog input unit, the digital input unit, and the digital output unit. It is possible to obtain the same effect as in the above embodiment. FIG. 3 is a block diagram of the maintenance controller in this case. Reference numeral 22 is a transmission unit capable of transmitting and receiving analog input values, digital input values, and digital output values of various sensors by multiplex transmission.

[0013]

As described above, according to the present invention, there is provided a large-capacity memory for collecting, storing, and variously managing the operating conditions of air conditioners and refrigerators and data necessary for various operations at regular intervals. In the maintenance controller,
A replaceable RAM card provided in the maintenance controller, a discriminating device for discriminating the presence or absence of the RAM card, and the RAM according to the result of the discriminating device.
Write a page in the page writing area of the card,
Since the configuration is provided with a means for determining the number of pages of the card and a means for determining the amount of use of the RAM card based on the result of this determination, if the specifications are the same, different RAs with different data are cheaper.
Even when the M card is used, there is an effect that the amount of use of the RAM card is determined and the centralized control can be easily performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a RAM card detection unit of a centralized control device for a refrigerating air conditioner according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the processing of the RAM card detection unit of the centralized control device for a refrigerating and air-conditioning apparatus according to an embodiment of the present invention.

FIG. 3 is a block diagram of a maintenance controller at a transmission input / output of a centralized control device for a refrigerating and air-conditioning apparatus according to another embodiment of the present invention.

FIG. 4 is a configuration diagram of a conventional centralized control device for a refrigerating and air-conditioning machine.

FIG. 5 is a block diagram of a conventional maintenance controller.

[Explanation of symbols]

 5 Maintenance controller 8 Microcomputer 13 RAM card 23 RAM card installation / non-installation determination device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuya Yamamoto 3-18-1, Oga, Shizuoka City Mitsubishi Electric Engineering Co., Ltd. Nagoya Office Shizuoka Branch

Claims (1)

[Claims] 1. A maintenance controller provided with a large-capacity memory for collecting, storing, and variously managing operating conditions of an air conditioner and a refrigerator and various data required for various operations at regular intervals, provided in the maintenance controller. A replaceable RAM card, a discriminating device for discriminating the presence or absence of the RAM card, and a page is written in the page writing area of the RAM card according to the result of the discriminating device to judge the number of pages of the RAM card. A centralized control device for a refrigerating and air-conditioning machine, comprising: a means for controlling the amount of RAM card used;