JP2638033B2 - Control unit for line multiplexer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used for a control device for controlling a line multiplexer which is remotely located. In particular, the present invention relates to an apparatus that can diagnose a line multiplexed by a line multiplexer. The control device of the present invention is used as a device for centrally controlling a plurality of line multiplexers arranged remotely.

〔Overview〕

The present invention relates to a control device for controlling a line multiplexing configuration by a line multiplexing device and diagnosing each line. In a control device for diagnosing a line which is not changed even when the line multiplexing configuration is switched, switching control and diagnostic control are performed. Can be executed simultaneously, and when diagnosing the line to be changed, the switching control and the diagnostic control are performed exclusively, thereby increasing the flexibility of the line control and the diagnosis thereof.

[Conventional technology]

2. Description of the Related Art Conventionally, there has been used a control device which controls a plurality of line multiplexers arranged at a distance and performs switching control of a line multiplexing configuration and centralized diagnosis of each line. When the line diagnosis is performed by such a control device, only the diagnosis that is completed before the switching is executed is executed, or the line diagnosis is executed so that the line is not changed during the diagnosis. Exclusive control is performed to prevent line configuration switching from being performed during execution.

[Problems to be solved by the invention]

However, in the conventional control device, when diagnosing a line that is not changed even when the switching control is performed, such switching control cannot be performed even though the multiplexing configuration changes without any problem. Was. Therefore, there is a disadvantage that the timing for executing the line diagnosis is limited.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a control device for a line multiplexer capable of flexibly switching a line multiplexing configuration and performing line diagnosis.

[Means for solving the problem]

The control device of the line multiplexer of the present invention includes a unit that simultaneously controls the switching unit and the diagnostic unit for a line that is not changed even when the multiplex configuration is switched, and a line that is changed when the multiplex configuration is switched. Is characterized by including control means for exclusively controlling the switching means and the diagnosis means.

(Operation)

The control device of the present invention can simultaneously control the switching of the line multiplexing configuration and the diagnosis of each line. Therefore,
It is possible to switch another line while performing line diagnosis on a line that is not changed when switching the multiplexing configuration.

〔Example〕

FIG. 1 is a block diagram of a control device of a line multiplexer according to an embodiment of the present invention.

The control device includes a central processing unit 1, a read-only memory 2, a random access memory 3, and an interface circuit 4 connected to each other via a bus 5. The read-only memory 2 has a line switching program 201 for switching the line multiplexing configuration by the line multiplexer, and a diagnostic program 20 for diagnosing each multiplexed line.
2 are stored, and the central processing unit 1 executes the line switching control and the line diagnosis control by these programs. When performing this line switching control, the current line multiplexing configuration 301, the switched line multiplexing configuration 302, and the specified switching execution time 303 are stored in the random access memory 3.

The central processing unit 1 can simultaneously execute the line switching control and the line diagnosis control for the line that is not changed even when the multiplexing configuration is switched, and the line switching control and the line diagnosis control for the line that is changed when the multiplexing configuration is switched. And are executed exclusively.

FIG. 2 is a block diagram showing an example of use of the control device, showing switching control of a line multiplexing configuration.

The control device 21 is connected to a line multiplexer 24 via a control line 22.
And the line multiplexer 24 and the control line
A line multiplexer 25 is controlled via 23. Fig. 2 (a)
Then, lines a and b are multiplexed and passed through data line 26,
A line multiplexing configuration in which lines a and b are divided by the opposing line multiplexer 25 is shown. In FIG. 2 (b), the line a is the same as FIG. 2 (a), but a line c different from the line b is multiplexed together with the line a and passes through the data line 26 to the opposite line multiplex. Lines a and c divided by device 25
Is shown. The control device 21 switches the line multiplexing configuration of FIG. 2 (a) to the line multiplexing configuration of FIG. 2 (b), and conversely changes the configuration of FIG. 2 (b) to that of FIG. Configuration can be switched. Further, each of the lines a, b, and c can be diagnosed.

 FIG. 3 is a flowchart of line switching control.

When switching the line multiplexing configuration from FIG. 2 (a) to FIG. 2 (b), if line diagnosis is being performed, the line multiplexing configuration before and after the line switching control is compared. As a result, when the line under line diagnosis is a line whose configuration is not changed, such as the line a, the control of the line configuration switching is executed for the line multiplexers 24 and 25. When the line under line diagnosis is changed to the line b, the switching control is stopped or executed after the diagnosis control ends.

 FIG. 4 is a flowchart of the line diagnosis control.

When executing the line diagnosis, if the time to switch the line multiplexing configuration is specified, the configuration contents are compared, and the line for which the line diagnosis is to be performed is not changed as the line a like the line a. In the case of a line, control of line diagnosis is executed. On the other hand, in the case of a line having a configuration change such as the line b, if the diagnosis is completed before the time at which the line configuration switching is performed, the diagnostic control is performed, and the diagnosis is performed at the time at which the line configuration switching is performed. If the diagnosis does not end, the control is stopped.

〔The invention's effect〕

As described above, the control device of the present invention compares the multiplexing configurations of the lines and performs not only the function of switching the multiplexing configuration and the function of the line diagnosis, but also the portions that do not change. Can be controlled simultaneously. Therefore, there is an effect that flexible control can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control device according to an embodiment of the present invention. FIG. 2 is a block diagram showing an example of use of the control device. FIG. 3 is a flowchart of line switching control. FIG. 4 is a flowchart of line diagnosis control. 1 central processing unit, 2 read-only memory, 3 random access memory, 4 interface circuit, 5
…… Bus, 21… Control device, 22, 23 …… Control line, 24,
25 ... line multiplexer, 26 ... data line.

Claims (1)

(57) [Claims] An apparatus for controlling a line multiplexing device, comprising: switching means for switching a multiplexing configuration of lines by a line multiplexing device; and diagnostic means for diagnosing each multiplexed line. For a line that is not changed by switching, a unit that simultaneously controls the switching unit and the diagnostic unit is included. For a line that is changed when the multiplexing configuration is switched, the switching unit and the diagnostic unit are exclusively controlled. A control device for a line multiplexing device, comprising control means.