JP2008283826A - Device information transmission method for remote supervisory controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional cyclic type remote supervisory controller has a limited transmission quantity per line and system information has to be intensively transmitted with a limited number of bits of the upper information. <P>SOLUTION: A preceding word having a sub-communication address set and a subsequent word having a sub-communication datum set are provided to a word which constitutes a frame for transmission, to transmit system information. Furthermore, in a normal time other than the start of the remote supervisory controller, only a measurement word and the sub-communication word, each being a normal transmission word, are transmitted, while in a state change, only a state change target word and the normal transmission word are transmitted. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cyclic remote monitoring control device, and more particularly to a method for transmitting system information such as device abnormality and self-diagnosis.

The cyclic remote monitoring control device is known from Patent Document 1 and the like, and is configured as shown in FIG. Reference numeral 1 denotes a master station or man-machine unit of the remote monitoring control device, 2 a slave station, and 3 a controlled device unit which is a device / equipment. Information is transmitted cyclically between the master station 1 and the slave station 2 via the transmission path 4. At that time, a control command is transmitted as a downlink command from the master station 1 to the slave station 2, and system information from the controlled device unit 3 is transmitted as uplink information from the slave station 2 to the master station 1.
In addition, between the slave station 2 and the controlled device unit 3, a control signal is output from the slave station 2 to the controlled device unit 3, and a display / measurement signal is transmitted from the controlled device unit 3 to the slave station 2. Entered.
JP 2005-184871 A

  In the cyclic remote monitoring and control apparatus, the transmission amount per line is limited to a maximum of 62 words and 930 bits in a general 44-bit system. For this reason, monitoring control information (display / measurement) of the controlled device unit 3 is mainly transmitted, and system information such as device abnormality and self-diagnosis is aggregated by assigning limited bits of uplink information and transmitted. .

5A and 5B show a format of a general cyclic information in the cyclic method. FIG. 5A is a cycle configuration diagram, FIG. 5B is a maximum frame configuration diagram, and FIG. 5C is a word configuration diagram. (C) F1 and F2 in the upward word (b) in the figure are bits assigned as system information and are limited bits, so detailed system information is collected directly from the controlled device unit 3 . For this reason, the remote monitoring and control apparatus is greatly inferior to those using the HDLC method or the IP method, which has a sufficient transmission amount per line and can transmit detailed system information.

An object of the present invention is to provide a device information transmission method for a cyclic remote monitoring and control device that makes system information transmission equivalent to the HDLC method or the IP method.

Claim 1 of the present invention cyclically transmits system information including a display / measurement signal of a controlled device section between a slave station of a remote monitoring control device and an upper remote monitoring control device via a transmission line. In what
Sub-communication is provided in a word constituting the frame for transmission, and system information is transmitted by providing a preceding word in which an address is set in the sub-communication and a subsequent word in which sub-communication data is set. It is what.

  According to a second aspect of the present invention, only the measurement word and the sub-communication word that are always transmitted words are transmitted during normal times other than when the remote monitoring control device is started up, and the state change target word and the constantly transmitted word are transmitted when the state changes. Only is transmitted.

  The third aspect of the present invention is characterized in that the apparatus abnormality related items in the sub-communication word are collected at the head of the sub-communication address.

  As described above, according to the present invention, system information is allocated to sub-communication (hereinafter referred to as sub-communication), and display information is transmitted as a state change transmission to skip display words, so that sub-communication data can be transmitted preferentially and efficiently. Is. In addition, system errors are also included in the system information. Collecting device abnormality-related items at the beginning of the sub-communication address enables priority transmission during status changes within the sub-communication, and quickly transmits device abnormalities. Is possible.

FIG. 1 is a frame configuration diagram showing an embodiment of the present invention, in which two continuous words of uplink information are sub-communications. In this embodiment, No. 62 word and No. 63 word are used as subcommittees, of which No. 62 word is used as a preceding word and No. 63 word is used as a subsequent word.
FIG. 2 shows a word configuration diagram, where (a) shows the subcome address of the preceding word, and (b) shows the subcome data of the succeeding word.

FIG. 3 is a conceptual diagram of transmission when the state changes. Since sub-communication is used in the present invention, display information excluding constantly changing words, such as measurement, is transmitted as state-change transmission, and the display word is skipped, so that sub-communication data is transmitted preferentially and efficiently.
The display word is transmitted when the apparatus is started up, when display information is requested from the host, and when a state change is detected. A display information request from the upper level is assigned an arbitrary control position without changing the format of the control word.
In addition, the amount of information transmitted by sub-communication is sub-address address 64 words and information 960 bits in consideration of the depth of the sub-cycle. Since the device error information is also included in the sub-communication, device abnormality-related items are collected at the head of the sub-communication address, and the device abnormality can be quickly transmitted by preferentially transmitting the status within the sub-communication.

  For example, it is assumed that the frames W1 to W31 shown in FIG. 1 are used as transmission words at the time of state change, W33 to W61 are always transmitted as measurement words, and No. 62 and No. 63 are always transmitted as subcommit words. In this case, as shown in FIG. 3, all words are transmitted when the apparatus is started in the first cycle. In the second cycle, the normal transmission word, that is, measurement words W33 to W61 and sub-communi words No. 62 and No. 63 are transmitted, and the display words W1 to W31 are omitted and the system information of the sub-communication is made efficient. Transmit well.

When a state change occurs in the word W2 in the third cycle, the normal state up to two cycles is held, and only the word W2 that is the state change target at the time of the state change and the constantly transmitted word in the first state change cycle is transmitted as uplink information. To do. In the fourth cycle, only the state change target word and the constant transmission word in the second cycle of state change are transmitted as uplink information, and in the fifth cycle, only the normal constant transmission word is transmitted. When a display information request is issued from the upper master station 1 after five cycles, all words are transmitted to the master station 1 based on the display information request in the sixth cycle.
Therefore, according to the present invention, it is possible to transmit the details of the system information in the same way as the HDLC system and the IP system, and to grasp the state of the apparatus without going to the site where the controlled device unit 3 is installed. It is something that can be done.

The frame structure figure of subcommunication which shows the embodiment of the present invention. It is a word block diagram of the subcommunication which shows embodiment of this invention, (a) is a preceding word figure, (b) is a succeeding word figure. Transmission conceptual diagram at the time of state change. The block diagram of a cyclic system remote monitoring control apparatus. In the upstream information format of the conventional cyclic remote monitoring and control apparatus, (a) is a cycle configuration diagram, (b) is a frame configuration diagram, (c) is a word configuration, (a) is a synchronous word diagram, ) Is an upward word diagram.

Explanation of symbols

1 ... Master station (or man-machine part) of remote monitoring control device
2 ... Slave station of remote monitoring control device 3 ... Controlled device part 4 ... Transmission path

Claims (3)

In the system information including display / measurement signal of the controlled device part is cyclically transmitted through the transmission line between the slave station of the remote monitoring control device and the upper remote monitoring control device,
Sub-communication is provided in a word constituting the frame for transmission, and system information is transmitted by providing a preceding word in which an address is set in the sub-communication and a subsequent word in which sub-communication data is set. Device information transmission method for remote monitoring control device. During normal times other than when the remote monitoring control device is started up, only the measurement word and the sub-communication word are always transmitted, and only the state change target word and the constant transmission word are transmitted when the state changes. The apparatus information transmission method of the remote monitoring control apparatus according to claim 1. 3. The apparatus information transmission method for a remote monitoring control apparatus according to claim 1, wherein apparatus abnormality-related items in the sub-communication word are collected at the head of the sub-communication address.

Images