JPH04255134A - Communication node id setting system - Google Patents

Abstract

PURPOSE:To eliminate the need for the manual operation for setting ID information and to allow the system to cope with the revision quickly and accurately by setting automatically node ID information from a center controller to each data communication node. CONSTITUTION:A reset control section 11 of a central controller 1 sends a reset signal to reset changeover command sections 23 - of communication nodes 2-4 to set a signal route of switches (SW) 24- to signal detection sections 22 - of its own node. Then ID information corresponding to the node 2 from a data communication section 10 is sent to a bus line 100 and a node TS is sent from an ID transfer notice signal (TS) transmission section 12. The detection section 22 detects the TS to store a node ID signal from the data communication section 20 to an ID register 21, and when the controller 1 stops tentatively the node TS, the SW 24 is thrown to the direction of the node 3 and an ID is set to all node sequentially and similarly. Thus, no manual operation is required and the system is revised quickly and accurately.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication node setting method, and more particularly to a communication node ID setting method in a system in which a plurality of data communication nodes are connected to a bus through a common transmission path to perform data communication with a central control unit. Regarding.

0002

2. Description of the Related Art Conventionally, in this type of data communication system, each data communication node has a built-in switch or the like that is manually set, and has semi-fixed node ID information.

0003

[Problem to be Solved by the Invention] In such a conventional communication node ID setting method, the node ID information is individually set manually for each data communication node using a switch, etc., so the setting is time-consuming. Therefore, it has been difficult to respond quickly and accurately to changes in the system.

0004

[Means for solving the problems] Communication node ID of the present invention
In a system in which a plurality of data communication nodes are connected to a bus through a common transmission path to perform data communication with a central control unit, a setting method is adopted in which a node corresponding to each of the data communication nodes is connected to the common transmission path. ID transfer means for sending ID information; and ID transfer notification signal sending means for sending a node ID transfer notification signal indicating that the node information is being sent to the common transmission path to a node ID transfer notification signal line. is provided in the central controller, and the node I
ID transfer notification signal detection means for detecting the D transfer notification signal, and the connection destination of the node ID transfer notification signal line input based on the output of this ID transfer notification signal detection means.
ID transfer notification signal route switching means for switching between the D transfer notification signal detection means and the next data communication node; and when the ID transfer notification signal detection means detects the node ID transfer notification signal, the ID transfer notification signal is sent to the common transmission path. Each data communication node is provided with ID setting means for receiving the node ID information and setting it as its own unique node ID, and the ID transfer notification signal sending means of the central control unit and each data communication node The node ID transfer notification signal line is connected to each of the node ID transfer notification signal lines in sequence.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. Reference numeral 1 denotes a central control unit that performs data communication with each communication node and manages the entire system. 10 is a bus line 100 provided in the central control unit 1 and serving as a common transmission path.
This is a data communication unit that performs data communication with each communication node via. Reference numeral 11 denotes a reset control unit for sending out a reset signal for the switching instruction units of all communication nodes via the reset signal line 101. Reference numeral 12 denotes an ID transfer notification signal sending unit that sends a node ID transfer notification signal to the node ID transfer notification signal line 102 indicating that the data communication unit 10 is outputting node ID information to the bus line 100. 2, 3 and 4 are communication nodes. (The number of communication nodes is not limited to three.) Regarding the communication node 4, the internal configuration representation is omitted.

The inside of each communication node is configured as follows. 20 and 30 are data communication units for performing data communication with the central control device 1. Reference numerals 21 and 31 are ID registers for storing own node ID information to be compared with node ID information transmitted and received during data communication. 22 and 32 are signal detection units that detect signals from the ID transfer notification signal sending unit 12 of the central control device 1. 23
, 33 are switching instruction units for instructing signal route switching based on signals from the signal detection units 22 and 32. 24,3
Reference numeral 4 denotes a switch (SW) for switching the signal route under the control of the switching instruction units 23 and 33.

Next, the operation will be explained.

When setting IDs to all communication nodes, first, the reset control unit 11 of the central control unit 1 sends a reset signal to the switching instruction unit of each node, and the switch (SW)
After setting the signal route direction to the own node signal detection unit side, the data communication unit 10 of the central control unit 1 sends node information corresponding to the communication node 2 to the bus line 100. After that, when the node ID transfer notification signal is sent from the ID transfer notification signal sending unit 12 of the central control device 1, the signal is detected by the signal detection unit 22 via the switch (SW) 24 of the communication node 2, and the data communication is started. Node I transferred from section 20
D information is stored in the ID register 21 by a latch signal from the signal detection section 22. Next, when the central control device 1 stops the node ID transfer notification signal after a certain period of time, the signal detection unit 22 of the communication node 2 confirms that the signal has stopped, and the signal route of the switch (SW) 24 is controlled by the switching instruction unit 23. The direction is the next node signal direction, and the node ID transfer notification signal lines 102 and 103 are connected. In this state, the data communication unit 10 of the central control device 1 again sends the node ID information corresponding to the communication node 3 to the bus line 100,
When the node ID transfer signal is sent from the ID transfer notification signal sending unit 12 of the central control device 1, the switch (SW) 24 of the communication node 2 and the switch (SW) 34 of the communication node 3
The signal is detected by the signal detection unit 32 of the communication node 3 via the node ID information transferred from the data communication unit 30 is stored in the ID register 31 by a latch signal from the signal detection unit 32. Next, when the central controller 1 stops the node ID transfer notification signal after a certain period of time, the communication node 3
The signal detection unit 32 confirms that the signal has stopped, and the switching instruction unit 3
3, the signal route direction of the switch (SW) 34 becomes the next node direction, and the node ID transfer notification signal lines 102, 103, and 104 are connected. The ID for the communication node 4 is stored by repeating the same process. After setting IDs to all communication nodes through the above procedure, data communication becomes possible.

0010

As explained above, according to the present invention, by automatically setting the node ID information for each data communication node from the central control device, it is possible to manually set the ID information of each data communication node. This eliminates the need for system changes and allows for quick and accurate responses to system changes.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention.

[Explanation of symbols]

1 Central control device 2, 3, 4 Communication node 10, 20, 30 Data communication section 11 Reset control section 12 ID transfer notification signal sending section 21, 31 ID register 22, 32 Signal detection section 23, 33 Switching instruction section 24, 34 Switch (SW) 100 Bus line 101 Reset signal line 102, 103, 104 Node ID transfer notification signal line

Claims (1)

[Claims] Claim 1. A system in which a plurality of data communication nodes are connected to a bus through a common transmission path to perform data communication with a central control unit, wherein a plurality of data communication nodes are connected to the common transmission path and correspond to each of the data communication nodes. ID transfer means for sending node ID information; and ID transfer notification signal sending means for sending a node ID transfer notification signal indicating that the node information is being sent to the common transmission path to a node ID transfer notification signal line. and an ID transfer notification signal detection means for detecting the node ID transfer notification signal, which is provided in the central control unit, and a signal line connection for the node ID transfer notification inputted based on the output of the ID transfer notification signal detection means. ID transfer notification signal route switching means for switching the destination to the ID transfer notification signal detection means or the next stage data communication node; and when the ID transfer notification signal detection means detects the node ID transfer notification signal, the common transmission is performed. Each of the data communication nodes is provided with ID setting means for receiving the node ID information sent to the network and setting it as its own unique node ID; A communication node ID setting method characterized in that each data communication node is sequentially connected to each other by the node ID transfer notification signal line.