JPH02149043A - Communication device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is applicable to, for example, remotely operating/stopping a plurality of terminal devices via a home bus, and monitoring the operating/stopping status and abnormal state of each terminal device. This invention relates to improvements in the transmission processing procedures of various communication devices, including home control devices for centralized control, which can be used to control devices.

2. Description of the Related Art A conventional communication device of this type includes a main control means 1, a display means 2, and a display means 2, as shown in FIG. Operation means 3. Transmitting/receiving means 4. and comparison means 5 are connected, and furthermore, comparison means 5 is connected to self-address setting means 6. It is also connected to destination address setting means 7. Further, the transmitting/receiving means 4 is connected to an external transmission line 8 and functions as a communication interface with each terminal device 9 connected on the same transmission line 8.

Self-address setting means 6. The destination address setting means 7 is configured such that its own address or an individual destination address indicating each terminal device 9 to be controlled can be entered, and the setting input operation is performed at the time of initial setting of system connection. be. Self-address setting means 6. The contents of each address input using the destination address setting means 7 are once transmitted to the comparison means 5, and the comparison means 5 compares whether the input self-address contents and the contents of each destination address match. Or, if there are a plurality of different terminal devices 9 to be controlled, a comparison is made to determine whether or not the addresses of each destination are duplicated. If this determination reveals that the contents of the self-address and the contents of the destination address match, or that the respective destination addresses overlap, the comparison means 5 uses the self-address setting means 6. By not accepting the setting input operation from the destination address setting means 7 and notifying the main control means 1 of this fact, the display means 2 will display messages such as ``My address and destination address match.'' or ``Destination address.'' It outputs an error message such as "Duplicate comrade." and points out the error when inputting the address settings. Conversely, if it is determined that the input contents are normal, such as that the contents of the input self address and the contents of the destination address do not match, and that the contents of each destination address do not overlap, the self address setting means 6, The setting input contents from the destination address setting means 7 are written as they are to the non-volatile memory in the main control means 1 to confirm the input, and the display means 2 outputs a message "Set completed",
The input confirmation sound "bin" is emitted.

In addition, as another means of setting input operation to avoid address duplication, for example, even if you try to input a destination address that has the same address contents as your own address, the determination means 5 automatically skips the part of your own address and inputs it. Some are configured to be fixed.

Using such a configuration, the contents of the self address and the contents of the destination address are registered in advance in the nonvolatile memory in the main control means 1, and then the entire system is brought into a normal operating state. Now, when an arbitrary terminal device 9 is to be remotely controlled or monitored from this communication device 10 in a normal operating state, the destination address is set in advance according to the own address of the target terminal device, but the operation means 3
By giving a control instruction signal to the main control means 1 from the main control means 1, the main control means 1 transmits the data as shown in FIG. A packet is generated and a transmission instruction is transmitted to the transmitting/receiving means 4.

Further, the transmitting/receiving means 4 converts the content of the transmission packet generated by the main control means 1 into a predetermined transmission signal, and sends it to the transmission line 8, thereby controlling the corresponding terminal equipment by a packet switching method.

Problems to be Solved by the Invention However, with the above configuration, address duplication is only pointed out or avoided during the setting input operation of the self address and destination address, but address duplication does not occur regularly during the normal operating state of the system. The configuration is not such that the sending process continues without interruption. Furthermore, normally the self address and the destination address must be placed within a predetermined address space, but in the unlikely event that for some reason this address data changes and is placed outside the area. However, there was a problem in that this cannot be automatically detected during normal operation.

The present invention solves such conventional problems. Even during normal operation of the system, the self address and the destination address may match, each destination address may overlap, and all address data may be fixed to a fixed address. The purpose is to continue to detect abnormalities in address data, such as whether it is placed outside the spatial area, and to prohibit transmission of packets containing address content determined to be abnormal.

Means for Solving the Problems In order to solve the above problems, the communication device of the present invention provides self-3
and a transmission determination means for detecting during normal operation of the system whether or not there is an abnormality in the contents of the self address and the contents of the destination address registered in the main control means. The apparatus is equipped with a transmission prohibition means for forcibly prohibiting transmission when an abnormality in the address content is detected.

Effect: With the above-described configuration, the present invention constantly detects errors such as address duplication, which were previously prevented only at the stage of setting and inputting the self address and destination address, even in the normal operating state of the system. Even if the address data being sent becomes abnormal during the process, the sending operation will no longer occur due to the error.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In FIG. 1, l of the communication device 10 of the present invention is a main control means, and this main control means 1 includes a display means 2, an operation means 3. Transmitting/receiving means 4. and comparison means 5, transmission determination means 1
1. Transmission prohibition means 12 is connected, and comparison means 5 is connected to self-address setting means 6. It is also connected to destination address setting means 7. Further, the transmitting/receiving means 4 is connected to the same transmission line 8.
It functions as a communication interface with each terminal device 9 connected above.

As for setting the self address and the destination address, as in the conventional example, the self address setting means 6. A setting input operation is performed using the destination address setting means 7, and the comparison means 5 determines whether the own address and the destination address match or each terminal device 9 to be controlled.
If there is no abnormality in the contents of the input address, such as whether there is any duplication between destination addresses indicating the same, the input is confirmed by registering these address data in the nonvolatile memory in the main control means 1. Next, a case will be described in which an arbitrary terminal device 9 is remotely controlled in the system operating state after completing procedures for system connection such as setting the own address and the destination address. First, a terminal device to be remotely controlled and its control contents are selected using the operation means 3, and a control instruction signal to that effect is given to the main control means 1. Therefore, the main control means 1 reads out the contents of its own address and the contents of the destination address registered in the internal non-volatile memory and generates a transmission packet in a predetermined format, and sends this transmission packet signal as it is to the transmission and reception means 4. Instead, the generated transmission packet signal is passed to the transmission determination means 11. Transmission determination means 1
In step 1, ■ whether the self address and the destination address are duplicated, ■ whether the self address and the destination address are both located within the determined address space, and ■ whether the entire transmitted packet follows a predetermined control instruction. A determination is made as to whether or not it is written in a correct format that can be transmitted, and the result is transmitted to the transmission inhibiting means 12. Based on this pass/fail determination, the transmission prohibition means 12 allows the main control means l to perform the transmission process if the generated transmission packet signal is normal, but if it is abnormal, it forcibly prohibits the transmission process. At the same time, by notifying the main control means 1 of this fact, the display means 2 will display "Unable to send".
Outputs an error message such as "transmission error".

In the above configuration, by newly providing a transmission determination means and a transmission prohibition means, the self-address can be determined.

This function ensures that the outgoing packets that are generated are determined to be normal/abnormal not only during the initial setting of the destination address but also every time a sending operation is performed even during the normal operation of the system, so that the data in the outgoing packets can be sent with incorrect data. This makes it possible to prevent the operation from occurring, that is, to avoid sending an abnormal signal to the outside of the communication device 10.

Effects of the Invention As described above, according to the communication device of the present invention, even during normal operation of the system, it continues to detect whether there is any abnormality in the contents of the self address registered in advance or the contents of the destination address, so that noise application during continuous operation is prevented. This is a countermeasure against so-called memory garbled due to garbled address data, etc., and even in the worst case scenario where address data is garbled, it will not cause damage to other communication devices and terminal equipment connected on the same transmission path. do not have. In other words, this has the effect of significantly improving the reliability of the entire system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a communication device according to an embodiment of the present invention, FIG. 2 is a block diagram of a conventional communication device, and FIG. 3 is a formant diagram of transmitted and received packets. 1... Main control means, 4... Transmission/reception means, 5... Comparison means, 6... Self-address setting means, 7...... Destination address setting means,
11...Transmission determination means, 12...Transmission prohibition means.

Claims (1)

[Claims] Transmitting/receiving means for sending control signals to terminal devices each having a self-address via a transmission line or receiving response signals from each terminal device, and self-address setting means for pre-registering self-addresses. and destination address setting means for pre-registering destination addresses indicating each of the terminal devices to be controlled;
When giving a control instruction to any of the terminal devices connected to the transmitting/receiving means, the content of the instruction, the self address and the destination address registered in advance by the self address setting means and the destination address setting means are provided. a main control means that generates a transmission packet in a predetermined format based on the content and transmits a signal to the transmitting/receiving means; and a case where the main control means is connected to the main control section and the main control means generates the transmitting packet and transmits a signal to the transmitting/receiving means. , a transmission determination means for checking the contents of the self address and the destination address registered in advance and determining whether the generated transmission packet is normal; and connected to the transmission determination means; A communication device comprising: a transmission prohibiting means for prohibiting transmission when the generated transmission packet is not normal.