JPH02159146A - Device selection system - Google Patents

Abstract

PURPOSE:To omit the unnecessary works of the non-selected devices to be monitored by using a centralized selecting function which selects the control and a prescribed device to be monitored after a communication address of the remote side is sent from a monitor device. CONSTITUTION:A monitor device 1 is first connected to a centralized access port 2 and transmits one of those addressess given individually to the devices 7-1-7-n to be monitored. This transmitted address is recognized by an address deciding circuit 3. An address control circuit 4 outputs the information showing the specific one of devices 7-1-7-n to receive an access. A selection circuit 5 outputs a selection signal 6 to the device to be monitored and designated by a control signal. Receiving the signal 6, the device to be monitored sends a reception confirming signal to the device 1 via the port 2. Hereafter the communication is performed between the device 1 and the device to be monitored.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device selection method, and particularly to a device selection method for controlling the addresses of selected monitored devices when a monitoring device communicates with a monitored device. Regarding.

[Conventional technology]

Conventionally, in this type of device selection method, each monitored device has an individual address, the monitoring device polls all monitored devices including the communication partner, and the monitored device with the specified address returns a reply. and communicated.

[Problem to be solved by the invention]

The conventional device selection method described above performs communication by polling, so the polling address information of the monitoring device is passed to the monitored device that does not communicate, so the monitored device that does not communicate ends up doing unnecessary work. There is.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device selection method having a centralized selection function of receiving the address of a specific monitored device transmitted from a monitoring device and selecting a designated address from among the addresses of a large number of monitored devices.

[Means to solve the problem]

The device selection method of the present invention is a device selection method that performs communication between one of a plurality of monitored devices and a monitoring device, in which address information given from the monitoring device to the plurality of monitored devices is received. and a centralized access port for transmitting reply information from one of the plurality of monitored devices to the monitoring device, and selection means for determining the address information, selecting a specified monitored device, and calling the specified monitored device. ing.

〔Example〕

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.

The embodiment shown in FIG. 1 includes a monitoring device 1, a central access port 2,
, an address determination circuit 3, an address control circuit 4, a selection circuit 5, and monitored devices 7-1 to 7-n. The monitoring device 1 is first connected to the central access port 2, and the monitoring device 1 sends one of the individually assigned addresses of the monitored devices 7-1 to 7n. The address determination circuit 3 recognizes this one address, and the address control circuit 4 outputs information indicating which of the registered monitored devices 7-1 to 7-n is to be accessed. The select circuit 5 sends a select signal 6 to the monitored device designated by this control signal.
Output. The monitored device that received the select signal 6
A reception confirmation signal is sent to the monitoring device 1 via the central access port 2, and communication can then be performed between the two.

〔Effect of the invention〕

As explained above, the present invention has a centralized selection function that performs control and selection of a predetermined monitored device when the monitoring device sends the address of the communication partner, so that unselected monitored devices do not require unnecessary work. This has the effect of allowing extremely efficient access.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention. 1... Monitoring device, 2... Central access port, 3.
...Address judgment circuit, 4...Address control circuit, 5
...Select circuit, 6...Select signal line, 7-1
~7-n... Monitored device, 8... Selection means.

Claims (1)

[Claims] In a device selection method in which communication is performed between one of a plurality of monitored devices and a monitoring device, receiving address information given to the plurality of monitored devices from the monitoring device and receiving address information of the plurality of monitored devices A device selection device comprising: a centralized access port for transmitting reply information from one device to the monitoring device; and a selection device for determining the address information, selecting a specified monitored device, and calling the device. method.