JP2826774B2 - Data transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transfer device of a remote control device connected to a central processing unit and a main storage device by an optical fiber.

[0002]

2. Description of the Related Art Conventionally, this type of data transfer apparatus is shown in FIG.
As shown in the block diagram, data transferred from the central processing unit 1 and the main storage device 2 to the channel 30 are stored in the data buffer 330 in the order in which they are sent, and sent to the transfer circuit 350 in the order in which they are stored. And transmitted to the remote control device 50 through the optical cable a. In the remote control device 50, the data received by the receiving circuit 510 is stored in the data buffer 520, and the received data processing circuit 53
Process with 0. On the other hand, the data sent from the input / output device 6 to the remote control device 50 and the error frame created by the error frame creation circuit 590 are transferred in the order in which they were received by the transfer data processing circuit 540.
0 to the transfer circuit 550, and to the channel 30 via the optical cable b. In the channel 30, the receiving circuit 4
The data buffer 420 receives the data and the error frame received in the
And sent to the central processing unit 1 and the main storage device 2 in the order in which they are stored.

[0003]

This conventional data transfer apparatus is connected by an optical fiber and has a large-capacity data buffer. Therefore, during normal data transfer, a transfer / processing stop instruction due to a failure or the like is issued. Urgent data such as an interruption instruction from software was also stored in the data buffer without being distinguished from normal data. Not transferred. Therefore, there is a problem that the interruption / stop instruction or the failure processing is delayed, and the time regulation of the input / output interface cannot be satisfied.

[0004]

A data transfer device according to the present invention comprises a remote control device connected to a central processing unit and a main storage device via a channel, and an input / output device connected to the remote control device. Having a first determination unit for determining whether the data transferred from the central processing unit and the main storage device is normal data or emergency data, and from the channel to the remote control device. When the first determination means detects emergency data when transferring the data, the first transfer means transfers the emergency data with higher priority than the normal data, and the data transferred from the remote control device is Second determining means for determining whether the data is normal data or urgent data; and when the second determining means detects urgent data, transferring the emergency data with priority over the normal data. A remote control device, wherein the remote control device detects a failure in transfer data transferred from the channel, and a second detection device detects a failure occurring in the remote control device. Detecting means;
And an emergency data generating means for generating emergency data based on the failure detected by the first and second detecting means.

[0005]

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

FIG. 1 is a block diagram showing one embodiment of the data transfer device of the present invention. The channel 3 is the same as the channel 30 of the conventional example, except that the determination circuit 310, the overtaking buffer 320, the switching circuit 340, the transfer circuit 350, the switching instruction circuit 360, the determination circuit 420, the overtaking buffer 440, and the switching circuit 45 are used.
0, a switching instruction circuit 460 is added. The remote control circuit 5 is configured by providing an emergency data generation circuit 560 instead of the error frame generation circuit 590 in the conventional remote control device 50.

Next, the operation of this embodiment will be described. Data from the central processing unit 100 and the main storage device 200 is transferred to the channel 3 via the data line c. Channel 3
Then, the transferred data is stored in either the data buffer 330 or the passing buffer 320 by the determination circuit 310, and when the emergency data is detected, the switching instruction circuit 36
Notify 0 of emergency data transfer. Overtaking buffer 320
When the data is stored in the switching circuit 360, the switching instruction circuit 360 issues an instruction to the switching circuit 340, suppresses the output of the data buffer 330, and sends the output of the passing buffer 320 to the transfer circuit 350. The data sent to the transfer circuit 350 is sent to the remote control device 5 via the optical cable a. In the remote control device 5, the transmitted data is
At 10, this is stored in the data buffer 520. The output of the data buffer 520 is sent to the reception data processing circuit 530, and performs processing for normal data and emergency data.

[0008] Data transferred from the input / output device 6 to the channel 3 is transferred to the transfer data processing circuit 54 of the remote control device 5.
Sent to 0. Transfer abnormality detection 58 for detecting abnormality of data transferred from the channel 3 via the optical cable a.
0, when the failure detection circuit 570 that collects the failures detected in the remote control device 5 notifies the emergency data generation circuit 560 of the occurrence of the failure, the emergency data generation circuit 560
Generates emergency data and sends it to the transfer data processing circuit 540. The transfer data processing circuit 540 sends the data from the input / output device 6 and the data from the emergency data generation circuit 560 to the transfer circuit 550 in the order of reception. The data sent to the transfer circuit 550 is transferred to the channel 3 via the optical cable b. In channel 3, this data is transmitted to the receiving circuit 410
The normal data is stored in the data buffer 430 by the determination circuit 420 and the emergency data is stored in the overtaking buffer 440, and then the switching circuit 460 is notified from the determination circuit 420 that the emergency data is stored in the overtaking buffer 440. I do. Switching instruction circuit 460 having received the notification
The switching circuit 450 suppresses the output of the data buffer 380 and sends the output of the passing buffer 440 to the central processing unit 1 via the data line c with priority.

[0009]

As described above, according to the present invention, when data transfer is performed between a channel device and a remote control device, the channel device has an overtaking buffer and a switching circuit so that emergency data is given priority over normal data. The emergency data can be transferred earlier than the number of data stored in the data buffer.
The stop instruction due to the failure or the interruption instruction from the software is quickly transferred to the partner device, and the time regulation of the input / output interface can be satisfied.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a data transfer device of the present invention.

FIG. 2 is a block diagram illustrating an example of a conventional data transfer device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Central processing unit 2 Main storage device 3, 30 channels 5, 50 Remote control device 6 I / O device 310 Judgment circuit 320, 440 Overtaking buffer 330, 430, 520 Data buffer 340, 450 Switching circuit 350 Transfer circuit 360, 460 Switching instruction Circuit 410, 510 Receiving circuit 420 Judgment circuit 530 Receive data processing circuit 540 Transfer data processing circuit 550 Transfer circuit 560 Emergency data generation circuit 570 Failure detection circuit 580 Transfer abnormality detection circuit 590 Error frame creation circuit

Claims (1)

(57) [Claims] 1. A remote control device connected to a central processing unit and a main storage device via a channel, and an input / output device connected to the remote control device, wherein the channel is connected to the central processing unit. And first determining means for determining whether data transferred from the main storage device is normal data or emergency data, and performing the first determination when transferring data from the channel to the remote control device. A first transfer means for transferring the emergency data with higher priority than the normal data when the means detects the emergency data, and a second transfer means for determining whether the data transferred from the remote control device is the normal data or the emergency data. Determining means for transmitting the emergency data with higher priority than normal data when the second determination means detects emergency data; An apparatus configured to detect a failure of transfer data transferred from the channel;
A second detection unit that detects a failure that has occurred in the own remote control device; and an emergency data generation unit that generates emergency data based on the failure detected by the first and second detection units. Data transfer device.