JP3612496B2 - Wireless device and remote monitoring control method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to, for example, a wireless device that performs remote monitoring control using a service channel and a remote monitoring control method thereof.
[0002]
[Prior art]
For monitoring control of wireless devices, from the viewpoint of versatility and low cost of monitoring tools, the monitoring control unit (hereinafter referred to as MPU) should have an interface that can communicate with general-purpose communication software for personal computers (PCs). A method of monitoring and controlling wireless devices using a personal computer is used.
[0003]
In addition, since the MPU process becomes complicated in such monitoring control, the MPU monitoring control is often limited only to the own station. For example, as shown in FIG. 4, it is necessary to connect a personal computer 4 directly to each MPU 3 for monitoring and controlling the apparatus.
[0004]
When performing monitoring control of a wireless device other than its own station, for example, as shown in Japanese Patent Laid-Open No. 9-23199, the MPU of each wireless station uses a service channel provided exclusively for monitoring control information. Thus, a method of exchanging information between MPUs is common.
[0005]
[Problems to be solved by the invention]
However, the conventional system described above has the following problems. That is, the first problem is that when the MPU is a device that does not support remote monitoring control, when performing control monitoring of the device, a personal computer must be directly connected to the device to be monitored and controlled. Therefore, it is necessary for the monitor to move to the station where the apparatus is installed, and maintenance is not easy.
[0006]
The second problem is that in the case of a device that supports remote monitoring control, each MPU needs to exchange information not only with its own station but also with the MPUs of all devices that are remotely monitored and controlled. is there. Therefore, the processing of the MPU increases, a high performance MPU is required, and the monitoring cost increases. Furthermore, since the processing for that is complicated, development of an apparatus etc. becomes difficult.
[0007]
The third problem is that when a device that has not previously had remote monitoring control has a function for that purpose, it is necessary to newly secure a dedicated communication procedure and a communication path for MPUs to communicate with each other. It is to become. Therefore, the volume of change contents of the apparatus becomes large, and it is practically impossible to change the apparatus that is operating in the field.
[0008]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a wireless device and a remote monitoring control method thereof that can easily realize remote monitoring control of the wireless device at low cost. That is.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an interface unit of the service channel having a wired port and a wireless port in a wireless device for exchanging communication data including a first character code using a service channel. Determining means for determining whether or not the service channel signal in the interface section is composed of a second character code other than the first character code; and determining that the service channel signal is composed of the second character code. And a routing unit that distributes the service channel signal to the wired port or the wireless port based on the second character code .
[0010]
Preferably, the routing unit distributes a signal from a wireless line or a wired line of the wireless device to a control unit of the wireless device, or distributes a control signal from the control unit of the wireless device to a predetermined wireless line or wired line. And the second routing for passing the signal from the wireless line to the wired line or passing the control signal from the wired line to the wireless line .
[0011]
Preferably, at least two wired ports are provided, one of which is connected to the corresponding wired port in the interface unit of any other wireless device, and the other is connected to the control unit of the own device. By adopting the configuration, data communication is performed on a one-to-one basis with any other wireless device via the service channel.
[0012]
Preferably, the first character code includes at least an ASCII code, and the second character code uses arbitrary byte data that does not overlap with byte data occupied by the ASCII code.
[0013]
According to another invention, remote monitoring control of a wireless device that exchanges communication data composed of the first character code using a service channel and has a wired port and a wireless port in the interface portion of the service channel. In the method, the step of determining whether or not the service channel signal in the interface unit is composed of a second character code other than the first character code, and according to the determination result, the service channel signal is transmitted to the wired port or Routing to a wireless port, and in the routing step, a first routing for distributing a control signal from a predetermined wireless line or a wired line to a control unit of the wireless device, and a control signal from the wireless line The second route passing through the wired line Remote monitoring and control method for a wireless apparatus for performing the ring is provided.
[0014]
Preferably, the control signal is composed of a character string using an ASCII code, and in the determining step, a character string composed of arbitrary byte data other than the ASCII code is determined.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of a monitoring control system according to an embodiment of the present invention. In the figure, the wireless devices 1 are connected to each other via a service channel (hereinafter, appropriately referred to as SC) wireless line 7. Here, the SC radio line is a digital service channel that handles digital signals.
[0016]
The inter-device connection cable 5 is a cable for connecting the wireless devices 1 to each other. The service channel (SC) interface unit 2 in each wireless device 1 is connected to the MPU 3 via the monitoring control unit connection cable 6. It is connected.
[0017]
Each wireless device 1 belongs to any one of the wireless station A (A station), the wireless station B (B station), and the wireless station C (C station) shown in FIG. Is in station A, devices 2 and 3 are in station B, which is the same station, and device 4 is in station C.
[0018]
The service channel (SC) interface unit 2 of the supervisory control system according to the present embodiment has a word detection function and a service channel (SC) routing function. The SC interface unit 2 includes two interface ports (input / output ports) on the wired output side, one of which is connected to the same port of another device in the same station, and the other is The cable is connected to the MPU port of its own device.
[0019]
The SC interface unit 2 further has an interface port on the wireless side, and communicates SC signals wirelessly with the opposite station via the SC wireless line 7 described above. Here, the MPU 3 is used for the monitoring control of its own station as it is, and is not particularly changed or modified for the remote monitoring control.
[0020]
In the monitoring control system shown in FIG. 1, a personal computer (personal computer) 4 is connected to one of the wireless devices 1 via an SC interface unit 2, and predetermined data is input / output by the personal computer 4. .
[0021]
In general, a wireless device often has a low-rate service channel for maintenance of the device in addition to the main signal (main signal) handled by the device. This service channel has various needs such as RS-232, RS-422, and RS-485 if the interface required by the user is an analog signal or a digital signal. For this reason, the service channel interface unit is usually made optional and an optional panel is mounted on the apparatus as needed.
[0022]
The MPU interface of the wireless device does not require a special tool for the user, and communication information that is normally installed on the personal computer can be used to display alarm information directly on the personal computer / display as a character string. In many cases, an ASCII code is used as an interface condition at the RS-232 level so that it can be displayed.
[0023]
FIG. 2 is a block diagram showing a detailed configuration of the SC interface circuit 2 of the monitoring control system according to the present embodiment. In the figure, a level conversion circuit 24 is used for level conversion of an SC signal with another radio apparatus installed in the same station, and a level conversion circuit 25 is used to convert an SC signal with the MPU 3 of the same radio apparatus. Used for level conversion.
[0024]
The word detection circuit 21 detects whether or not the SC signal arriving from the opposite station by radio matches the word set for each radio apparatus, and when a matching word is detected, the result is sent to the routing circuit 23. Send to. Similarly, the word detection circuit 22 performs word detection on the SC signal sent from another wireless device in the same station on the wired side, that is, the output of the level conversion circuit 24, and sends the result to the routing circuit 23. send.
[0025]
FIG. 3 is a diagram for explaining the detailed operation of the routing circuit 23 in the SC interface circuit. The routing circuit 23 according to the present embodiment performs three kinds of routing operations, which will be described in detail below, according to the word detection result.
[0026]
The first routing operation is when the word detection circuit 21 detects the above-described word match. At this time, as shown in FIG. 2, the word is detected from the SC signal from the wireless side, and the word detection signal Is output to the routing circuit 23 ("when a word is detected on the wireless side" in FIG. 3A).
[0027]
The routing circuit 23 routes the SC signal on the wireless side to the level conversion circuit 25 side as shown in FIG. 3A by the output from the word detection circuit 21. As shown in the figure, the wired interface port of the level conversion circuit 25 is cable-connected to the MPU interface port. Therefore, here, the SC signal from the wireless side is connected to the MPU.
[0028]
The second routing operation is an operation performed when the word detection circuit 22 detects a word match. At this time, the word detection circuit 22 detects a word from the SC signal from the wired side, that is, the output from the level conversion circuit 24 (“when detecting word on the wired side” in FIG. 3B). Accordingly, the output from the word detection circuit 22 is received, and the output of the level conversion circuit 24 is routed to the level conversion circuit 25 side as shown in FIG. With this operation, the SC signal on the wired side is connected to the MPU.
[0029]
The third routing operation is an operation when neither the word detection circuit 21 nor the word detection circuit 22 detects a word or detects a logout word. At this time, as shown in (c) of FIG. 3 ("when word is not detected"), the signal on the wireless side is routed to the signal on the wired side, and the SC signal is left as it is (through), and the next Pass through the wireless device.
[0030]
By setting the word detection circuit of each wireless device to a different word, the first routing operation and the second routing operation do not occur simultaneously in a plurality of devices. Therefore, the control signal from the personal computer transmitted via the SC signal can be communicated only with the MPU of any one wireless device. Even with the MPU and personal computer originally developed for monitoring and control within the own station, Remote monitoring control is possible.
[0031]
Communication between the personal computer 4 and the MPU 3 is normally performed using an ASCII code. Ascii codes are only assigned (assigned) from 00h to 7Fh ("h" means hexadecimal), so data of 80h to FFh is normally exchanged between the personal computer and the MPU. Absent. Therefore, in the monitoring control system according to the present embodiment, by setting an arbitrary value in the range of 80h to FFh as the detection word, routing does not malfunction due to normal data.
[0032]
In order to switch the routing circuit, when sending a setting word (80h to FFh) from the personal computer, 1 byte of the setting word (for example, 80h) is stored as a binary file. Then, it can be easily switched by sending it using general-purpose communication software using a binary file transmission function.
[0033]
In addition, when saving a binary file, by setting the file name to, for example, the name of a station, etc., it becomes easy for a handler to understand the file to be transmitted, and so-called human error (artificial error) occurs. Can be prevented.
[0034]
As described above, according to the present embodiment, even a wireless device that can monitor and control only its own station can easily perform remote control by providing a service channel interface unit with a word detection function and a service channel signal routing function. It becomes possible to monitor and control the device.
[0035]
In other words, the interface part of the service channel in the wireless device is equipped with a function for detecting a control signal from a personal computer (word detection) and a routing function for switching the destination of the personal computer control signal based on the detection result. Even if the MPU and the personal computer are only compatible with the monitoring control of the communication device of their own station, by connecting the service channel interface unit and the control unit (MPU), for example, By changing the option panel of the service channel section and simply changing the wiring outside the apparatus, it is possible to remotely monitor and control the wireless apparatus using an existing MPU and a personal computer.
[0036]
Normally, the MPU of the remote device and the personal computer are set to 1 by routing to the MPU unit only when the service channel passing through between the wireless devices matches the specific word set by the own device. Communication is possible in a one-to-one manner, and supervisory control can be performed in the same manner as the own station.
[0037]
Furthermore, since the word transmission from the personal computer to the word detection circuit is possible with the binary file transmission function of the general-purpose communication software, no dedicated communication software for monitoring control is required, and monitoring and maintenance costs can be greatly reduced.
[0038]
【The invention's effect】
As described above, according to the present invention, it is determined whether or not the service channel signal of the interface unit having a wired port and a wireless port is a signal having a character code other than a predetermined character code, and the determination result Therefore, even with a wireless device that can only be monitored and controlled by its own station, the service channel interface unit has a word detection function and a service channel signal routing function. It is possible to easily monitor and control the remote device.
[0039]
In addition, one of at least two wired ports is connected to the corresponding wired port in the interface unit of any other wireless device, and the other is connected to the control unit of the own device, so that the own device is connected via the service channel. In the same manner as the above control, one-to-one data communication can be performed with any other wireless device.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a monitoring control system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a detailed configuration of an SC interface circuit of the monitoring control system according to the embodiment.
FIG. 3 is a diagram for explaining a detailed operation of the routing circuit according to the embodiment;
FIG. 4 is a block diagram illustrating an example of a monitoring control system according to a conventional method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Radio | wireless apparatus 2 Service channel (SC) interface part 3 Monitoring control part 4 Personal computer 5 Inter-device connection cable 6 Monitoring control part connection cable 7 Service channel wireless line 21, 22 Word detection circuit 23 Routing circuit 24, 25 Level conversion circuit

Claims (9)

In a wireless device for exchanging communication data consisting of a first character code using a service channel,
An interface portion of the service channel having a wired port and a wireless port;
Discrimination means for discriminating whether or not the service channel signal in the interface unit comprises a second character code other than the first character code;
Routing means for distributing the service channel signal to the wired port or the wireless port based on the second character code when it is determined that the service channel signal is composed of the second character code ; Wireless device to do. The service channel signal is a predetermined control signal input from a data terminal device connected to the interface unit via a wired line, or a control signal transmitted from another wireless device through a wireless line. The wireless device according to claim 1, wherein: The routing means distributes a signal from the wireless line or wired line to the control unit of the wireless apparatus, or first routing distributes a signal from the control unit of the wireless apparatus to the wireless line or wired line , and 3. The wireless device according to claim 2 , wherein second routing is performed to pass a signal from the wireless line to the wired line or to pass a signal from the wired line to the wireless line . 4. There are at least two wired ports, one of which is connected to the corresponding wired port in the interface unit of any other wireless device, and the other is connected to the control unit of the own device. 4. The wireless device according to claim 3, wherein data communication is performed on a one-to-one basis with the other arbitrary wireless device via the service channel. The first character code includes at least an ASCII code, and the second character code uses arbitrary byte data that does not overlap with byte data occupied by the ASCII code. 2. The wireless device according to 2. 6. The radio apparatus according to claim 5, wherein the control signal includes a character string using the ASCII code, and the determination unit determines a character string including arbitrary byte data other than the ASCII code. . 3. The wireless device according to claim 2 , wherein the data terminal device inputs the control signal using a binary file transmission function included in general-purpose communication software installed in the device. In the remote monitoring and control method of a wireless device that exchanges communication data consisting of the first character code using a service channel and has a wired port and a wireless port in the interface portion of the service channel,
Determining whether a service channel signal in the interface unit is composed of a second character code other than the first character code;
Routing the service channel signal to the wired or wireless port based on the second character code when it is determined that the service channel signal consists of the second character code ; and
In the routing step, a first control signal from a predetermined wireless line or a wired line is distributed to a control unit of the wireless device, or a control signal from the control unit of the wireless device is distributed to a predetermined wireless line or a wired line. Remote monitoring control of a wireless device characterized by performing routing and second routing for passing a control signal from the wireless line to the wired line or passing a control signal from the wired line to the wireless line Method. 9. The wireless apparatus according to claim 8, wherein the control signal is composed of a character string using an ASCII code, and in the determining step, a character string including arbitrary byte data other than the ASCII code is determined. Remote monitoring control method.

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