JPH0567045A - Data transfer device - Google Patents

Abstract

PURPOSE:To preferentially transfer emergency data than normal data to an opposite device by possessing a channel which operates a data transfer between the channel and a remote controller with a discriminating means and a priority transfer means. CONSTITUTION:The data from a central processing unit 100 and a main storage device 200 are transferred through a data line (c) to a channel 30. The transferred data are stored in either a data buffer 330 or a passing buffer 320 by a discrimination circuit 310. When the emergency data are detected, the emergency data transfer is communicated to a changeover indicating circuit 360. When the data are stored in the pass-ahead buffer 320, the indication is given from the switching indicating circuit 360 to a changeover circuit 340. Thus, the output from the data buffer 330 is suppressed, and the output of the pass- ahead buffer 320 is transmitted to a transfer circuit 350. The data transmitted to the transfer circuit 350 are transmitted through an optical cable (a) to a remote controller 50. The transmitted data are received by a reception circuit 510, and stored in a data buffer 520.

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 which is connected to a central processing unit and a main storage device by an optical cable.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing an example of a conventional data transfer apparatus, which is a central processing unit 100 and a main storage unit 20.
All the data transferred from 0 to the channel 300 is stored in the data buffer 330 in the order in which they are sent, sent to the transfer circuit 350 in the order in which they are stored, transferred to the remote control device 500 through the optical cable a, and transferred to the remote control device 5.
Data buffer 520 via the receiving circuit 510 in 00
Then, it is processed by the reception data processing circuit 530. On the other hand, from the input / output device 600 to the remote control device 50
The data sent to 0 is sent from the transfer data processing circuit 540 to the transfer circuit 550 and sent to the channel 300 through the optical cable b. The data received by the receiving circuit 410 is stored in the data buffer 420 in the order sent from the remote control device 500, and sent to the central processing unit 100 and the main storage device 200 in the order stored.

[0003]

This conventional data transfer device has a large-capacity data buffer in a device connected by an optical fiber, and normally gives a stop instruction or software to transfer / process due to a failure during data transfer. Since urgent data such as an interruption instruction from the device was also stored in the data buffer without being distinguished from normal data, urgent data will not be written unless all the transferred data has been transferred to the partner device. It was not transferred to the other device. Therefore, there is a problem that if the interruption / stop instruction is delayed, the instruction is transferred to the partner device.

[0004]

A data transfer apparatus according to the present invention comprises a remote control unit connected to a central processing unit and a main storage unit by an optical cable via a channel, and an input / output unit connected to the remote control unit. In the data transfer device having a device, the channel is the remote controller from the channel, and the first determination means determines whether the data transferred from the central processing unit and the main storage device is normal data or emergency data. A first priority transfer unit that suppresses the transfer of normal data and transfers the emergency data preferentially when the first determination unit detects the emergency data when transferring the data to the control device; and the remote control. Second determining means for determining whether the data transferred from the device is normal data or urgent data, and the channel for the main memory device and the central processing unit. The second determination means detects the urgent data when transferring the data, the second priority transfer means suppresses the transfer of the normal data and preferentially transfers the urgent data. The transferred data is discriminated and stored in each buffer by the first judging means, the transfer of the normal data is suppressed by the first priority transferring means, and the emergency data is transferred preferentially to the remote control device. The data transferred from the above is discriminated by the second judging means and stored in each of the buffers, the transfer of the normal data is suppressed by the second priority transferring means, and the emergency data is prioritized by the central processing unit and the main memory. It is characterized in that it is transferred to the device.

Then, the first and second priority transfer means are respectively an overtaking buffer for storing the emergency data detected by the first and second determination means, and an instruction of the first and second determination means. And a transfer circuit that switches to the overtaking buffer side to transfer the emergency data, and the remote control device detects an error in the data transferred from the channel via the optical cable. A detection circuit, and a failure detection circuit for detecting a failure in the data transferred from the input / output device,
An emergency data generation circuit that generates emergency data when at least one of the transfer abnormality detection circuit and the fault detection circuit outputs a detection output may be provided.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a data transfer device of the present invention.

In this embodiment, a remote control device 50 is connected to the central processing unit 100 and the main storage device 200 via a channel 30 by optical cables a and b, and an input / output device 600 connected to the remote control device 50. Have. The channel 30 is the same as the channel 300 of the conventional example shown in FIG.
Determination circuit 310 which is the determination means, the overtaking buffer 320 which is the first priority transfer means, the switching circuit 340, the switching instruction circuit 360, and the determination circuit 42 which is the second determination means.
0 and the overtaking buffer 440, which is the second priority transfer means,
A switching circuit 450 and a switching instruction circuit 460 are added, and the determination circuit 310 determines whether the data transferred from the central processing unit 100 or the main storage device 200 is normal data or urgent data, and when urgent data is detected. This is switched by the switching circuit 340 via the overtaking buffer 320 and sent to the transfer circuit 350 in preference to the normal data in the data buffer 330. The determination circuit 420 determines whether the data transferred from the remote control device 50 is normal data or urgent data. If the data is urgent data, the second priority transfer means gives priority over the normal data to the central processing unit 100.
Transfer to. Further, the remote control device 50 has the transfer abnormality detection circuit 5 in addition to the conventional remote control device 500 shown in FIG.
80, failure detection circuit 570, and emergency data generation circuit 5
When the transfer abnormality circuit 580 detects an abnormality in the transfer data from the transfer circuit 350 of the channel 30, and the failure detection circuit 570 detects and collects the failure in the transfer data from the input / output device 600. , And notifies the emergency data generation circuit 560 to generate the emergency data.

Next, the operation of this embodiment will be described.
Data from the central processing unit 100 and the main memory 200 are transferred to the channel 30 through the data line c. The transferred data is stored in either the data buffer 330 or the overtaking buffer 320 by the determination circuit 310, and when the urgent data is detected, the switching instruction circuit 360 is notified of the urgent data transfer. When the data is stored in the overtaking buffer 320, the switching instruction circuit 360 moves the switching circuit 34.
The output of the data buffer 330 is suppressed, and the output of the overtaking buffer 320 is sent to the transfer circuit 350. The data sent to the transfer circuit 350 is sent to the remote control device 50 through the optical cable a. The received data is received by the receiving circuit 510 and stored in the data buffer 520. The output of the data buffer 520 is sent to the reception data processing circuit 530, and the normal data and the emergency data are processed.

On the other hand, from the input / output device 600 to the channel 30
The data to be transferred to is sent to the transfer data processing circuit 540 of the remote control device 50. Transfer error detection circuit 580
Detects an abnormality in the data transferred from the channel 30 via the optical cable a. The fault detection circuit 570 detects and collects the fault detected by the remote control device 50.
When the transfer abnormality detection circuit 580 or the failure detection circuit 570 notifies the emergency data generation circuit 560 of the occurrence of a failure, the emergency data generation circuit 560 generates the 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 600 and the data from the emergency data generating circuit 560 to the transfer circuit 550 in the order in which they are received. The data sent to the transfer circuit 550 is transferred to the channel 30 via the optical cable b. The transferred data is received by the reception circuit 410, and the determination circuit 42
When 0, normal data is stored in the data buffer 430 and urgent data is stored in the overtaking buffer 440. Judgment circuit 4
When the switching instruction circuit 460 notifies the switching instruction circuit 460 that the urgent data is stored in the overtaking buffer 440, the switching instruction circuit 460 causes the switching circuit 450 to perform the data buffer 380.
The output of the passing buffer 440 is preferentially sent to the central processing unit 100 through the data line c.

[0010]

As described above, according to the present invention, the channel for transferring data between the channel and the remote control device has the determination means and the priority transfer means, so that the urgent data is prioritized over the normal data. Since it is possible to transfer the emergency data, it is possible to transfer the emergency data earlier than the number of data stored in the data buffer.

[Brief description of drawings]

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

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

[Explanation of symbols]

 100 Central Processing Unit 200 Main Memory 30, 300 Channels 310, 420 Judgment Circuit 320, 440 Overtaking Buffer 330, 430, 520 Data Buffer 340, 450 Switching Circuit 350, 550 Transfer Circuit 360, 460 Switching Instruction Circuit 410, 510 Reception Circuit 50,500 Remote control circuit 530 Received data processing circuit 540 Transfer data processing circuit 560 Emergency data generation circuit 570 Fault detection circuit 580 Transfer abnormality detection circuit 600 Input / output device a, b Optical cable c Data line

Claims (3)

[Claims] 1. A remote control device connected to a central processing unit and a main storage device by an optical cable via a channel,
In a data transfer device having an input / output device connected to the remote control device, the channel determines whether the data transferred from the central processing unit and the main memory is normal data or emergency data. And the first determining means detects urgent data when transferring data from the channel to the remote control device, and suppresses transfer of normal data and preferentially transfers urgent data. No. 1 priority transfer means, second determination means for determining whether the data transferred from the remote control device is normal data or emergency data, and data is transferred from the channel to the main storage device and the central processing unit. When urgent data is detected by the second determination means during the operation, the transfer of normal data is suppressed and the urgent data is transferred with priority.
Priority transfer means, the channel discriminates the data transferred by the first determination means and stores it in each buffer, and the first priority transfer means suppresses the transfer of the normal data and prioritizes the emergency data. To the remote control device, the data transferred from the remote control device is discriminated by the second determination means and stored in each of the buffers, and the transfer of normal data is suppressed by the second priority transfer means. A data transfer device, wherein emergency data is transferred to the central processing unit and the main storage device with priority. 2. An overtaking buffer for storing the emergency data detected by the first and second determining means, and instructions for the first and second determining means, respectively. 2. The data transfer apparatus according to claim 1, further comprising a switching circuit that switches to the overtaking buffer side to transfer the emergency data. 3. The remote control device includes a transfer abnormality detection circuit for detecting an abnormality in data transferred from the channel via the optical cable, and a fault for detecting a fault in the data transferred from the input / output device. A detection circuit,
An emergency data generation circuit for generating emergency data when a detection output is output from at least one of the transfer abnormality detection circuit and the failure detection circuit.
Alternatively, the data transfer device described in 2.