JPS6149879B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection confirmation method for a connecting device that controls connections between two groups of devices.

One method for connecting devices is to connect the first group of devices and the second group of devices.
There is a method in which a connecting device is placed between devices in a group, and any device in the first group is connected to any device in the second group under the control of the device. A conventional connection confirmation method in such an inter-device connection system will be explained with reference to FIG. In Figure 1, A1~
An is the device of the first group, B1 to Bm are the devices of the second group,
1 is a connection device, and 2 is a connection confirmation signal transmitter.
Now, when the first group of devices A1 connects with the second group of devices Bm, the first group of devices A1 connects to the second group of devices Bm.
A connection request to the connection device 1 is issued to the connection device 1. Upon receiving this connection request, the connection device 1 connects the first group of devices A1 to the second group of devices Bm. Next, the second
The device Bm of the group sends a connection confirmation signal from its connection confirmation signal transmitter 2 to the device A1 of the first group via the connection device 1. The first group of devices A1 receives this confirmation signal, confirms the connection, and then starts the data transfer operation.

However, in this conventional connection confirmation method, when the first group device A1 issues a connection request to the second group device Bm to the connecting device 1, the connecting device 1 mistakenly connects the first group device A1 to the second group device Bm. Even when connected to device B1 of the group, a connection confirmation signal is sent from the connection confirmation signal transmitter 2 of device B1 to device A1 of the first group.
In this case, the first group of devices A1 determines that it is connected to the target device Bm (actually, it is connected to B1), and starts the next transfer operation. That is, the conventional connection confirmation method has a drawback that it is not possible to distinguish between an incorrect connection and a normal connection. Furthermore, even if it is assumed that there is an erroneous connection, the first group of devices, the connected device, and the second group of devices become suspect devices, which has the drawback that the suspect range is wide and abnormality handling becomes complicated.

Furthermore, if the configuration is extended to, for example, a device in the second group transferring data received from a device in the first group to another device in the third group, it is possible that an abnormality may occur in the device in the third group. It will be done. In such cases, too, with conventional connection confirmation methods, it is not possible to know in which device and in what form the abnormality appears.

In order to solve the above-mentioned drawbacks, the present invention provides a device number checking circuit in the connecting device, and checks the device number of the second group of devices sent by the first group of devices with the device number in the own device. By reporting the results to the first group of devices, erroneous connections are prevented. Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 2 shows a configuration diagram of an embodiment of the present invention. In FIG. 2, A1 to An are devices of the first group, B1
~Bm is a second group of devices, and 1 is a connecting device. The connection device 1 is connected to a first group of device corresponding parts C1 to 1, which are provided in one-to-one correspondence with the first group of devices A1 to An.
Cn, second group device corresponding parts D1 to Dm provided in one-to-one correspondence with the second group devices B1 to Bm, and first group devices A1 to An and second group devices B1 to Bm.
It consists of matrix switches 11-nm connecting the The first group of device correspondence units C1 to Cn each include a decoder 3 and a selector 4, and the second group of device correspondence units D1 to Dm each include a competition control circuit 5 and a device number matching circuit 6.

Now, for example, the device A1 of the first group is the device of the second group.
Consider the case of connecting with Bm. In this case, the first group of devices A1 is the device corresponding part C in the connection device 1.
1, the device number of the target device Bm of the second group is sent. The device corresponding section C1 of the first group is
The decoder 3 decodes the device number of the device Bm, and the selector 4 issues a connection request to the target device corresponding section Dm of the second group. In the device corresponding unit Dm of the second group, the contention control circuit 5 selects one connection request including any connection requests from other devices of the first group. Here,
The competition control circuit 5 of the device corresponding unit Dm of the second group is
Assume that a connection request from the first group of devices A1 is selected.

On the other hand, the device number matching circuit 6 in the second group of device corresponding sections Dm has the device number of the corresponding device corresponding section prepared in advance. Device support department for the second group above Dm
When the competition control circuit 5 selects a connection request from the first group of devices A1, the device number information of the second group of devices Bm sent from the first group of devices A1 is sent to the first group of devices corresponding section. 2nd group device support unit through C1
It is input to the device number verification circuit 6 in Dm. Note that the data line for this purpose is omitted in FIG. The device number verification circuit 6 checks the device A of this first group.
The device number Bm sent from 1 is compared with the device number within the own device, and if they match, the device number Bm sent from device number 1 is sent from the device number Bm of the second group to the device number Bm of the first group through the device number C1 of the first group. A normal signal is sent to device A1 in the group, and switch 1m is connected. Also, if there is no match as a result of the verification, the first
An abnormality signal is sent to the device A1 of the group. The first group of devices A1 confirms the normality of the connection based on the received signal.

As described above, in the present invention, accurate connection information can be reported to the first group of devices by collating device numbers in the connecting device, and normal transfer operation between the two device groups is guaranteed. In addition, in the present invention, since the device number verification circuit is provided in the connecting device,
The scope of suspicion is limited to the first group of devices and connected devices,
The second group of devices does not fall into the suspect range, which has the advantage of simplifying abnormality handling.

[Brief explanation of the drawing]

FIG. 1 is a block diagram for explaining a conventional connection confirmation method, and FIG. 2 is a block diagram of an embodiment of the present invention. A1-An...devices of the first group, B1-Bm...devices of the second group, C1-Cn...devices corresponding to the first group, D1
~Dm…Second group device support unit, 1…Connection device, 3
...Decoder, 4...Selector, 5...Conflict control circuit,
6...Equipment number verification circuit, 11~nm...Switch.

Claims (1)

[Claims] 1. A connection device that is installed between a first group of devices and a second group of devices and performs connection control between any device of the first group and any device of the second group, wherein the device of the first group and a second group of device compatible units corresponding to the second group of devices, and the first group of device compatible units receive information from the first group of devices. The device number of the selected second group is decoded, a connection request is sent to the corresponding second group device corresponding unit, and the selected second group device corresponding unit is
The device number of the second group sent from the device of the first group is compared with the equipment in the device itself, and if it matches, it is determined to be normal, and if it does not match, it is reported to the device of the first group that it is abnormal. A unique connection confirmation method.