JPS5894255A - Multiplexing information transmission device - Google Patents

Abstract

PURPOSE:To prevent disappearance of a transmitting program in case of loss of an electric power supply, by using a readable and writable non-volatile RAM, for a storage device for storing a transmission item, a transmitting method, etc., and changing the stored contents without stopping the device. CONSTITUTION:Between a setting device 5 for providing a transmission item, a transmitting method, a transmission sequence, etc. to a transmitting device 12 of a multiplexing information transmission device 1, and a data bus 15, an interface circuit 16 is provided, a controller 13 is connected to the bus 15, and various information is sent and received to and from a receiving device 11 through the bus 15. The part between this bus 15 and the device 12 is connected to a data bus 127 through a bus interface circuit 124, and to the bus 127, a transmitting circuit 125, a microprocessor 121 and an ROM122 are connected. Also, an RAM123 and a non-volatile RAM128 are connected to the bus 127, and under the control of the processor 121, the transmission item, the transmitting method, the transmission sequence, etc. are stored in the RAM128, its contents are changed without stopping the device, and in the event of loss of an electric power supply, the information is held.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an improvement in a multiplexed information transmission apparatus.

Technical Background of the Invention For example, in the case of electric power systems, conventionally, when a power supply station or control center exchanges information with a large number of electric stations, one-on-one cycling, digital information transmission equipment, remote monitoring and control equipment, etc. The required number of information transmission devices are installed.

However, in recent years, with the development of digital computing devices such as microcomputers, multiplexed information transmission devices that combine the functions of several information transmission devices into one set have come into use9.

In Figure 0, which shows an example of the configuration of the multiplex information transmission apparatus shown in Figure 1, 1 is a multiplex information transmission apparatus. a receiving device 11 that receives information coming from a station, a transmitting device that transmits information to an electric station, etc., a control circuit 13 that receives commands from a control device 2 such as a control desk, and outputs information to a display device 3 such as a monitoring panel. The display circuit 14 is composed of a data pt4 bus 15 for exchanging information between the display circuit 14, the receiving device 11, the transmitting device 12, the control circuit 13, and the display circuit 14.

In such a configuration, information transmitted from an electric station or the like via the transmission line 4 is received by the receiving device 11, and the information is output to the data bus 15.

On the other hand, when a command to an electric station etc. is required, the control device 111
2 performs an operation to give an operation command, and outputs the contents of this operation command to the control circuit 13.

The control circuit 13 performs verification, encoding, etc. on the output from the control device 2 according to predetermined rules, and outputs it as information to the data bus. The transmitting device 12 transmits the data bus 15 based on the contents stored in advance in the storage device of the transmitting device 112.
Necessary information is extracted from the information output above and transmitted to other electrical stations etc. via the transmission line 4. Also, display circuit 1
4 extracts necessary information from among the information output on the data bus 15 based on preset contents and displays the display device 3.
Output/output to.

In such a multiplex information transmission device, a transmitting device 12 that transmits information to the outside is a transmitting device 1 as shown in FIG.
A read-only storage device (ROM) that stores programs, etc.
; R・adOnly M@mory, hereinafter RO
M) 122, a read/write storage device (RA) used for working areas, information storage, etc.
M:Random Access M@mory,
(hereinafter referred to as RAM) 123, an interface circuit 124 for connecting the data bus 15 and the transmitter 12
, a transmission circuit 125 that encodes information and converts it into a serial code in order to transmit the information to an electric station, etc., a signal transmission device 126 that converts the serial code into a subcarrier and transmits it, a microgross unit 121, a ROM 12J, and RAM 721
j, a data bus 127 for exchanging information between the interface circuit 124 and the transmission circuit 125
It is composed of a lot of things.

The microprocessor 121 controls the entire transmitting device 12, and the ROM 7JJ controls the microprocessor 12.
Round transmission items that transmit content and information controlled by 21,
It remembers the transmission method, transmission order, etc., and sends it to R28.
23 from the data bus 15 to the interface circuit 124
Store information retrieved via the .

The microprocessor 121 controls the entire transmitting/receiving device 12, and the ROM 122 stores the contents to be controlled by the microprocessor 121, as well as transmission items, transmission method, transmission order, etc. for transmitting information. Ori, R.A.
M123 is from r-tapas 15 to interface circuit 1
The information retrieved via 24 is stored. Transmission circuit 1
25 receives a control command from the microprocessor 121 and executes the RA based on the contents stored in the ROM 122.
The information stored in M12J is sequentially extracted, converted into a serial code, and outputted to the signal transmission device 9126, and the signal transmission device 126 converts this output into a subcarrier and transmits it via the transmission line 4. and transmit it to an electrical station, etc.

Problems with the Background Art The storage devices (ROM, RAM) used in such a multiplex transmission device have the following properties.

In other words, once the contents of ROM are stored, they cannot be erased, but the contents cannot be changed freely.To change the contents, the contents must be erased with an eraser and then written each time with a special writing device such as a ROM writer. There must be.

Also, although AsoM can freely change the memorized contents,
If the power is turned off due to a power outage or maintenance of the device, the stored contents will be lost.

Therefore, for the storage device of the transmitting device that stores programs such as transmission items, transmission method, transmission order, etc. of the multiplexed information transmission device, it is not possible to use RAM, which loses its memory contents when power is lost due to power outage, etc., and ROM is often used. It will be used.

However, if we take the power system as an example, each time the information transmitted by the transmitter changes due to the addition of an electric station or a change in equipment, the RO
The contents of M must be rewritten using a dedicated writing device such as a ROM writer.

In this case, it is generally necessary to use a new ROM and write new programs, etc. to it using a dedicated writing device.In addition, the device must be stopped to replace the ROM, and replacement is time-consuming. The problem remains.

Purpose of the Invention The present invention has been made in view of the above circumstances, and it
A non-volatile RAM is used as a storage device of the transmitting device to store the transmission method, transmission order, etc. Even when changing the information to be transmitted, etc., the storage contents can be easily changed without stopping the device. It is an object of the present invention to provide a multiplex information transmission device that can perform this function.

Summary of the invention That is, in order to achieve the above object, the present invention uses a non-volatile RAM that can write and read data without losing its storage contents even when power is lost, and various necessary information such as transmission items, transmission method, transmission order, etc. It is intended to be stored in non-volatile RAM.

Embodiment of the Invention Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Multiplexed information transmission device according to the present invention! The lower 2 diagram is shown in FIG. 3, and the lower part diagram of the transmitter is shown in FIG. 4, and the same components as in FIGS. 1 and 2 are given the same reference numerals.

The multiplexed information transmission device shown in FIG. 3 is basically the same as the conventional device shown in FIG. 1, but #! 1 - A setting device 5 for providing information such as transmission items, transmission method, transmission order, etc. to the transmitting device 12 in the figure, and a row line interface circuit 16 that provides an interface between this setting device 5 and the data bus 15. The difference is that .

Furthermore, the transmitting device 12 is basically the same as the one in the book shown in FIG. 2, but a storage device 128 using a readable/writable and non-volatile storage device, so-called non-volatile RAM, is added to the one shown in FIG. Programs for items that may be changed such as transmission items, transmission methods, and transmission order are stored here, and the ROM I 2 jl contains a microprocessor 121 that is a control center necessary for the transmission device 12 to function. The microprocessor 121 stores programs that do not need to be changed, such as the control program of The difference is that the writing routine of the zologram is executed and the setting information is given to and written into the storage device (hereinafter simply referred to as non-volatile RAM) 128 which is made up of non-volatile RAM.

Therefore, the transmitting device 12 in the device of the present invention is different from that in the conventional device.
Whereas the transmission is carried out according to the contents of OM 122,
Transmission is performed according to the contents of the nonvolatile RAM 12B. The setting device 5 is a device connected to the multiplexed information transmitting device 1 in order to rewrite the storage contents of the non-volatile RAM 12 & of the transmitting device 12, and can be, for example, a computer or a dedicated writing device.

The configuration device [5] may be permanently installed in the multiplexed information transmission device 1, but since this increases the equipment cost, only the interface circuit 16 is permanently installed and the configuration device 5 is connected via this interface circuit 16 when necessary. to connect.

In addition, if there are multiple transmitting devices 12, generally a unique device number is set for each device, and the device with the corresponding device number is selected by inputting that device number. In order to rewrite the contents of the non-volatile RAM 1211 of a transmitting device, the machine number of the transmitting device to be rewritten is input and specified from the control device 12 or the setting device 5, and the contents to be rewritten are set. By setting the device 5 and giving a write command, the multiplex information transmitting device 1
The setting device 5 is selected by the control circuit 13 of the controller 13 and the setting information is sent onto the data bus 15, and on the transmitting device side, the transmitting device that has received the machine number designation receives and receives the information on the data bus 15. , microgrosse, under the control of S121, the receiver stores the contents according to the received information in non-volatile RAM J
This is a rewrite of the contents of J8.

The operation of this device having such a configuration will be explained.

If it is desired to change the transmission items, transmission method, transmission order, etc. of the transmission device 12 in the multiplexed information transmission device 1, the setting device 5 is first connected to the interface circuit 16.

Then, put the multiplexing information transmission device into write mode,
The input information of the setting device 5 is output onto the data bus 15.

Then, the user specifies the transmitting device 1120 machine number to be rewritten and operates the setting device 5 to cause the setting device 5 to output the information to be rewritten together with the write command. These commands and information are transferred to the data bus 15 under the control of the control circuit 13.
The signal is output to the top and given to each transmitting device 12. When receiving a command specifying a machine number, the transmitter 12 with the corresponding machine number is selected from among the transmitters 12, operates, and inputs the information on the data bus 15.

Then, according to the above-mentioned write command, the transmitting device 12 controls the υ microprocessor 121 to write the information taken in into the nonvolatile RAM 72B, and writes the information into the nonvolatile RAM 72B.
The contents of AM I J 8 are rewritten to the output contents of the setting device 5.

In this way non-volatile RAM 1,? The contents of 41 are rewritten into a program including new transmission items, transmission method, transmission order, etc.

When you cancel the write mode, the micro gloss
sets the non-volatile RAM IJg to write-protected mode, and from then on, unless the above operation is performed again, the cine volatile R
AM 12 # will hold the last content written.

Note that the contents other than the write mode are the same as those explained in FIG. 1 and FIG. 2, so the explanation thereof will be omitted here.

In this way, a non-volatile RAM that can be read and written into the storage device of the transmitting device 12 and retains its contents even if the power is lost is used to transmit items that are highly susceptible to change and whose contents should not be lost when the power is lost.・Programs such as the transmission method and transmission order are written in the address area of this non-volatile RAM, and control programs for the microgross unit 121 that do not require changes are stored in the address area of the ROM 122, and their working area or data The address area of RAM is used for temporary storage of ROM and RAM.

The king features of non-volatile RAM are designed to be used for different purposes, so even if it becomes necessary to change the transmission items, transmission method, transmission order, etc. due to expansion of electrical facilities or equipment changes, it is possible to simply write the contents of non-volatile RAM. All you have to do is replace the ROM f! - No need to rewrite and replace. Therefore, there is no need to stop the device for a long time to replace the ROM). It becomes extremely easy to switch the content of Rodarum.

In addition, even if the non-volatile ELAM Fi power is lost, the memory contents can be read out as they were once the power is restored, so the setting device 6
Once set, there is no need to set it again until the next change.

When the transmitting device fi112 performs transmission, the micro processor 12 operates according to the basic program in the ROM122.
1 (Non-volatile RAM J in which transmission routines are stored)
Moving on to the execution of the J & program, this non-volatile RA
Transmission items/transmission methods/in accordance with the contents of M I J II
Transmissions are made in transmission order.

The above is a configuration in which the number of non-volatile RAMs J J II is kept to a necessary minimum, but as another example, as shown in FIG. Make it. That is, another set of non-volatile RAM
J J 9 will be added.

In other words, in the configuration shown in FIG. 4, one set of nonvolatile RAM
Since J j 8 L is not available, the contents from the setting device 5 are stored only in this one set of nonvolatile RAM J J J, and information transmission is immediately started based on the stored contents.

However, it is possible that an error may occur when writing.
In this case, there is a risk that there will be a difference in content between the written information and the stored information, and there is also a risk that different content or content that is inconvenient for execution may be written due to an input operation or a mistake in the program.

Since this is different from the original content, the problem remains that the transmission could not be carried out, or that a transmission other than the intended one could be performed. Moreover, since the previous transmission routine program has been lost, the input program must be debugged or rewritten, and transmission cannot be performed during that time.

In the case of the device shown in Figure 5, there are two sets of non-volatile RAM;
One can be used primarily and the other secondary.

In other words, if the non-volatile RAM IJa is used as the main source, a program that makes changes to the new nine will first change the original non-volatile RAM.
1 j Store in 9. And this non-volatile RA
After testing the new program stored in M 129 and confirming that there is no vAb, the contents of the program are transferred to the main non-volatile RAM 128 and stored in the non-volatile RAM 128.
AM 12 Rewrite the contents of B with a new program.

In this way, a completely error-free new program will be stored in the main non-volatile RAM 72B that stores the transmission logs to be actually used, so transmission can be performed in accordance with the new program immediately after the transfer is completed. (particularly), there is almost no downtime for the equipment.

In the case of the configuration shown in FIG. 5, it is possible to use an inexpensive volatile RAM in place of the secondary nonvolatile RAM 129.

In other words, non-volatile RAM is much more expensive than general volatile RAM, and may be more expensive than conventional non-volatile RAM.
Since the purpose of 9 is for temporary storage for testing new programs, etc., if these tests are completed in a short time, there is no need to consider accidents such as power loss.
There is no problem with using volatile RAM.

In this case, after confirming the contents of the program written in the RAM, the program is immediately transferred to the nonvolatile RAM 12B.

This makes it possible to obtain the same functions as those shown in FIG. 5 at a low cost.

If it takes time to set up a program, using the configuration shown in Figure 5 allows you to use the contents stored in the main non-volatile RAM 111# to send the settings until the new program settings are completed. After completion, the new program can be sent to Marudachi without having to stop the device.

As described above, according to the present invention, it is possible to easily change the transmission program that defines the transmission items, transmission method, transmission order, etc. necessary for transmitting information, and furthermore, even when the power is lost, the transmission program is lost even when the power is lost. The transmission program can be exchanged without stopping the device -j-J
It is possible to provide a multiplexed information transmission device that can perform the following functions.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but can be practiced with appropriate modifications within the scope of the invention without changing its gist.

Effects of the Invention As detailed above, the present invention has a plurality of transmitting devices and receiving devices, and transmits and receives information, and each of the transmitting devices transmits information according to a transmitting program stored in advance in a storage device provided in each transmitting device. In the multiplexing information transmission device, the storage device is a non-volatile storage device that is capable of reading and writing at least the storage area of the transmission program and does not lose the stored information when the power is lost. In addition, the multi-electrification information transmission device is configured with a device for setting program contents used when changing the contents of the transmission log 2, and the contents of the transmission program are changed due to an increase in the number of electric stations, etc. In this case, the program content setting device gives a command to write a changing transmission program to the transmitting device, and the contents of the transmitting program storage area of the storage device are rewritten to the changing transmitting program. This eliminates the hassle of replacing the ROM with a new ROM, which is the case with conventional systems that use ROM as the storage device for this part.In addition to being able to easily implement changes, there is no need to stop the device during replacement. Furthermore, it is possible to provide a multiplexed information transmission apparatus having excellent features such as not losing the contents of the transmission program when the power is lost.

[Brief explanation of the drawing]

1pJ1 is a block diagram showing a schematic configuration of a conventional multiplexed information transmission device, FIG. 2 is a block diagram showing the S configuration of the transmitting device portion thereof, and FIG. 3 is a configuration of a multiplexed information transmission device according to the present invention. FIG. 4 is a block diagram showing the configuration of the transmitter part according to the present invention, and FIG. 5 is a block diagram showing a modification thereof. 1... Multiplexed information transmission device, 2... Control device, 3.
... Display device, 5... Setting device, 11... Receiving device, 12... Transmitting device, 13... Control device, 14...
・Display circuit, 16...Interface circuit, 12...iikuro! Processor, 122...ROM, 12
3-. RAM, 125... Transmission circuit, 126... Signal transmission device, 128.129... Non-volatile RAM 0 Applicant's agent Patent attorney Takehiko Suzue Figure 5th factor

Claims (1)

[Claims] It has a plurality of transmitting devices and receiving devices, and transmits and receives information, and each of the transmitting devices transmits information to be transmitted according to a transmitting zologram stored in a storage device provided in advance, and is multiplexed. In the information transmission device, at least the transmission 1! Use a non-volatile storage device that can read and write to the program storage area and will not lose its stored contents when the power is lost. Also, the multiplexing information transmission device is equipped with a device for rewriting the contents of the transmitting program. A multiplex information transmission device characterized in that: