JPS6136267B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides, for example, a magnetic tape control device (hereinafter referred to as
MTC) and multiple magnetic tape units (hereinafter abbreviated as MTU) that are connected to this MTC and controlled as lower-level devices of this MTC.
Set the MTU to a state where data can be sent and received with the MTC,
Concerning methods for incorporating into MTC drift.

A normal MTC has multiple MTUs connected to it, and it is possible to arbitrarily switch which of these MTUs can be enabled for data transmission with the MTC, that is, which one to incorporate. A conventional method for this purpose will be described below.

FIG. 1 shows a conventional connection diagram of MTC and MTU. In Figure 1, 1 is
MTC 2 is an MTU, and each MTU 2 is connected via a gate 3 to a common bus 4 within the MTC 1. 5 is a switch provided corresponding to each MTU 2, and this switch 5 is for instructing the installation of the corresponding MTU 2. 6 is a gate control unit for controlling on/off of each gate 3, 7 is a display element provided corresponding to each MTU 2, and this display element 5 indicates that the corresponding MTU 2 is installed. It is for the purpose of

Now, when one of the switches 5 is turned on, the gate control unit 6 turns on the corresponding gate 3 and puts the corresponding MTU 2 in a state where it can transmit and receive data with the MTC 1. At the same time, the corresponding display element 7 is turned on to display externally that the corresponding MTU 2 has been installed.

Now, in the conventional method as described above, switch 5
If MTU2, which was instructed to be installed by , a situation occurs in which the MTU does not actually work. In this case, MTC or
This method has the disadvantage of increasing the amount of time the system is unable to operate, since it is not known which part of the MTU is at fault.

Therefore, the present invention aims to solve the above-mentioned drawbacks of the prior art, and its feature is that the lower-level device for which installation is instructed is diagnosed, and only when installation is possible,
The reason is that it has been incorporated.

An embodiment of this invention will be described below. FIG. 2 shows a connection diagram of MTC and MTU according to the present invention. In Figure 2, 10 is
MTC 20 is an MTU, and each MTU 20 is bus-connected to a common bus 24 within the MTC 10 via a gate 23, respectively. 25 is each MTU20
This switch 25 is provided to instruct the installation of the corresponding MTU 20. 26 is a gate control unit that controls on/off of each gate 23; 27 is a gate control unit that controls each gate 23;
This display element 27 is a display element provided corresponding to the MTU 20, and is for displaying that the corresponding MTU 20 is installed. The steps up to this point are the same as in Figure 1, but in Figure 2, each
An MTU diagnosis unit 28 that diagnoses the MTU 20 and a display control unit 29 that controls lighting of each display element 27 are provided. When one of the switches 25 is turned on, the MTU diagnostic unit 28 first responds to the
In order to diagnose the MTU 20, a signal is sent to the gate control unit 26 to turn on the corresponding gate 23. Then, the MTU diagnostic unit 28 transmits and receives data to and from the corresponding MTU 20 via the gate 23 that is turned on, and executes the diagnostic operation. This diagnostic operation may be to confirm that the signal line is reliably connected between the MTC and the MTU, for example, by checking whether the MTU has received commands and control signals instructed by the MTC.
The MTU diagnosis section 28 determines the corresponding
When it is detected that the MTU 20 can be made operational, the gate control unit 26 and the display control unit 29
A signal is sent to the gate 23 so that the corresponding gate 23 is maintained in the on state from then on, and the corresponding display element 27 is turned on. In this way, from now on MTC10
becomes capable of transmitting and receiving data with the corresponding MTU 20, becomes operational, and the corresponding display element 27 lights up, indicating that the corresponding MTU 20
The operator is informed that the selected item is selected.

Furthermore, when the MTU diagnosis section 28 detects that the corresponding MTU 20 cannot be put into an operable state as a result of the above diagnosis, it sends a signal to the gate control section 26 to turn off the corresponding gate 23, so that the MTC 10 becomes connected to the corresponding MTU 20. Disable data transmission and reception. In this case, even though the switch 26 is turned on, the corresponding display element 27 does not light up, so it is known from the outside that the MTU 20 in question cannot be made operational due to a failure.

As explained above, according to the present invention, when connecting a lower-level device, it is confirmed that the connection state is reliable and that the functions are sufficiently provided, and then the connection is displayed. Confidence can be increased. Furthermore, if a fault occurs in the connected system, it is easy to point out the location of the fault, and the time during which the system is unable to operate can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a conventional connection diagram of MTC and MTU, and FIG. 2 is a connection diagram of MTC and MTU according to the present invention. In Figure 2, 10...MTC, 20...MTU,
23...Gate, 25...Switch, 26...Gate control section, 27...Display element, 28...MTU diagnosis section, 2
9...Display control unit.

Claims (1)

[Claims] 1. In a device that controls a plurality of lower-level devices, an installation instruction means is provided corresponding to each of the lower-level devices and instructs the lower-level device to be incorporated into the lower-level device; a built-in display means for displaying that the device has been incorporated into the subordinate device, and a built-in display means provided corresponding to each of the lower-level devices, and permission for data transmission and reception with the lower-level devices;
A gate means for prohibition and a diagnosis means for diagnosing a lower-order device are provided, and when the installation instruction means instructs installation of a certain lower-order device, the corresponding gate means is turned on and the diagnosis means performs a diagnosis. The device is characterized in that the relevant lower device is diagnosed, and if the result of the diagnosis indicates that the relevant lower device can be incorporated, the corresponding gate means is kept on and the corresponding built-in display means is operated. A method for incorporating lower-level devices.