JPH0944778A - Alarm information transmission device - Google Patents

Abstract

PURPOSE: To provide an alarm information transmission device which obtains alarm information with a simple constitution. CONSTITUTION: An input device 1 adds the device number to inputted data to output this data to a bus L. An output device 2 or an arithmetic unit 3 takes in data, to which a required device number is added, out of data flowing on the bus L. If abnormality occurs in the input device 1 as the transmission device, it adds its own device number to transmit an alarm code and alarm message information to the bus. These alarm code and alarm message information to which the device number is added are received and taken in by operation display devices 4 and 5 as other transmission devices.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for transmitting alarm information in a device for transmitting data such as a process amount.

[0002]

2. Description of the Related Art Conventionally, as a data transmission method, process data such as temperature collected by a slave station is transmitted by a slave station to a master station via a transmission line in response to a polling signal from the master station. There is a polling method in which after the processing, a polling signal is transmitted to another slave station again.

However, in the polling system, the main station is always required and the polling signal is always required, so that the apparatus is complicated, it takes a long time to respond, and the communication speed is insufficient.

When an abnormality occurs in the slave station, the master station needs to know the abnormality alarm of the slave station.

[0005]

Normally, when an alarm is issued, the slave station simply generates a flag indicating the presence or absence of the alarm, but the operator at the master station does not know the details of the abnormality that occurred, and the operator cannot handle it. It was inconvenient.

In view of the above points, an object of the present invention is to provide an alarm information transmission device having a simple structure and capable of obtaining alarm contents.

[0007]

SUMMARY OF THE INVENTION According to the present invention, when a warning is issued, a transmission apparatus for sending a warning message information indicating the warning code and the warning code with its own apparatus number to a bus,
It is an alarm information transmission device equipped with an alarm code having the device number attached to the bus and another transmission device for receiving and receiving alarm message information.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a structural explanatory view showing an embodiment of the present invention. In FIG. 1, for example, an input device 1, an output device 2, an arithmetic device 3, and the like as a transmission device are connected to a bus L such as a common network as a transmission line. The output device 2, ..., the arithmetic device 3,
, Etc. constitute the capturing device. A device number unique to the device is attached to each of these devices, and data or the like can be transmitted using this device number.

The analog signal data such as the temperature input to the input device 1 is output to the bus L with a unique device number of the input device 1 after being subjected to necessary processing such as linearization. .

Of the data flowing on the bus L in this way, the output device 2 and the arithmetic device 3 take in the necessary data. For this reason, these capture devices include:
Depending on which input device or arithmetic device data is required, the device number of the output data of the input device or arithmetic device required by the capture device is set in advance as the capture number.

For example, if the data of the input device 1 is taken in by the output device 2 and the arithmetic device 3, the output device 2 and the arithmetic device 3 set the same number as the device number of the input device 1 as the take-in number. deep.

Of the data flowing through the bus L, the output device 2 discriminates and selects only the data having the device number of the corresponding input device 1 which coincides with the data acquisition number, fetches the data, and outputs the data after predetermined processing. .

Further, the arithmetic unit 3 selects, discriminates and fetches only the data having the device number of the input device 1 which matches the fetching number from the data flowing through the bus L. Then, after performing other necessary arithmetic operations such as averaging, the data is given a unique device number of the arithmetic device 3 and output to the bus L.

By the way, it is assumed that an abnormality occurs in the input device 1 as a transmission device on the bus L.

Then, the input device 1 attaches its own device number "01" and the alarm code "A" together with the message information "CJ ALARM" indicating the content of the alarm (meaning "reference contact is abnormal"). ) Is transmitted to the bus L as follows.

01 A CJ ALARM The bus L is transmitted from the input device 1 as the transmission device.
The alarm code and the alarm message information to which the device number flowing through is received and received by the first operation display device 4 as another transmission device, and which device is used as the first operation display device 4? It is possible to know whether such an abnormal alarm has occurred, store it in the memory, or concretely display the alarm message on the display means by the operating means so that a person can easily understand it and quickly deal with the abnormality. Similarly, the second operation display device 5 also receives and captures the input data from the input device 1
The same alarm information can be held in both the first and second operation display devices 4 and 5, and the same alarm information can be displayed without any difference between the operation display devices 4 and 5. It will be possible.

Next, FIG. 2 shows a slightly detailed configuration explanatory diagram. When an abnormality occurs in the input device 1 as a transmission device,
The processing means 1b understands the content of the abnormality, determines what kind of alarm should be issued, sends alarm message information corresponding to the alarm code to the transmission means 1f, and the transmission means 1f uses the number setter 1e to send its own device number. The alarm code and the alarm message information are sent to the bus L by adding.

The alarm code and the alarm message information with the device number flowing through the bus L from the input device 1 are received by the transmission means 4a of the operation display device 4 as another transmission device and received via the fetch processing means 4b. The warning message can be stored in the memory 4c, and the necessary warning message can be displayed on the display means 4e by operating the operation means 4d to notify the operator.

In order to improve the reliability of transmission, the input device 1 as a transmission device may transmit the alarm information code and the alarm message information having the same device number to the bus L a plurality of times. .

In the normal state, the input device 1 processes the data taken in by the input switching device 1a by the processing means 1b and stores it in the memory 1c, and the data is given a unique device number by the number setting device 1e. And outputs to the bus L. The operating means 1d of the input device 1 is like a starting switch used at the time of start-up.

[0021]

As described above, according to the present invention, when an alarm is issued, the device number of the device is attached and an alarm code and alarm message information indicating the abnormality content are transmitted to the bus, and the transmission device flows through the bus. It is an alarm information transmission device equipped with an alarm code having a device number and another transmission device that receives and takes in alarm alarm message information. For this reason,
There is no need for a main station, and the communication speed can be sufficiently high. From a configuration consisting of a minimum of two devices and a bus, a combination of dozens or hundreds of data and devices as far as the numbers permit. , Simple and arbitrarily, and can be configured flexibly, and easily and sufficiently with various systems, flexibility,
It is highly scalable and can respond effectively and efficiently. In addition, even if an error occurs in any transmission device,
Since the alarm message information is automatically output to the bus,
With the operation display device, etc., it is possible to easily and instantly know what kind of device and what kind of abnormality has occurred with a message, and it is possible to display it on the display device etc. in an easy-to-understand manner. It is not necessary to individually request and obtain the alarm information on the operation display device, and the alarm information can be automatically obtained. Moreover, even if there are multiple operation display devices, the alarm information of the devices can be obtained at the same time, the abnormality alarm data can be kept the same, and the abnormality can be known at different places at the same time. The security can be secured, and it is possible to effectively deal with abnormal situations. If the transmission device transmits the alarm information and the alarm information having the same device number to the bus a plurality of times, the reliability of the transmission can be further improved.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view showing one embodiment of the present invention.

FIG. 2 is a configuration explanatory view showing one embodiment of the present invention.

[Explanation of symbols]

 1 Input device 2 Output device 3 Arithmetic device 4, 5 Operation display device L bus

Claims (1)

[Claims] 1. A transmission device for transmitting an alarm code and an alarm message information indicating an alarm content to a bus when an alarm is issued, and an alarm code having the device number flowing through the bus. An alarm information transmission device, comprising: another transmission device that receives and receives alarm message information.