JPH0250503B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a terminal control device including a channel for controlling input/output devices by creating a connection table between input/output devices such as terminal devices and input/output device adapters.

Conventionally, there has been a configuration shown in FIG. 1 as a configuration for controlling a plurality of input/output devices. central processing unit cpu
The terminal control TC connected to includes a channel CH,
This channel connects and controls the corresponding input/output device IO among the plurality of input/output devices IO.
Since a certain input/output device IO operates in correspondence with a specific channel CH, if one of the channels CH fails and the input/output device IO is still intact, an unused channel CH is sent to the terminal control unit TC. Even if there is
There was a drawback that the input/output device IO could not be used immediately after being reconnected, and connection control could not be continued unless both hardware and software were readjusted.

The purpose of the present invention is to improve the above-mentioned drawbacks, to prepare a join table that joins an input/output device IO and an input/output device adapter IOA, and to connect the adapter IOA and the input/output device
The objective is to provide a terminal control device that can be flexibly connected to IO.

Embodiments of the present invention shown in the drawings will be described below. FIG. 2 is a block diagram showing the configuration of a terminal control device as an embodiment of the present invention.
is a channel, especially a terminal, multiplexer,
Channel. Also, BS-PR is the channel mentioned above.
Basic program that controls TMC, AP-
PR1, AP-PR2... are application programs, and SVP is a management program for the entire terminal control device. The management program SVP manages multiple application programs AP-PR1, AP-PR2...
In addition to controlling the startup of the basic program BS-PR, it also controls access to the basic program BS-PR via the gate.
Note that the CPU and IO are the same as in Figure 1. In FIG. 2, the channel TMC and the input/output device adapter IOA are collectively referred to as a terminal control unit. Also, the memory part MEM such as SVP and TBL
The CPU and the terminal control unit together (in Figure 2, all parts other than the input/output device IO) are called the terminal control unit. Furthermore, the processing section here includes a central processing unit CPU and a basic program BS-PR.

Now, when the input/output device IO is powered on, its signal is channeled via the input/output device adapter.
TMC will be notified. Channel TMC sets the number of input/output device adapter IOA to Basic Program BS
- Since PR is notified, the program writes the number of the input/output device adapter to table TBL.
Next, the program BS-PR sends a sense command to the channel TMC to notify the input/output device adapter IOA of the model code of the connected input/output device IO. The input/output device adapter IOA obtains the connection table TBL by assigning its own number and notifying the basic program BS-PR.
That is, when power is applied to the input/output device IO,
Since the number of the input/output device adapter connected to it is configured to be automatically sent to the program BS-PR, the program BS-PR that controls the channel TMC can be used as a command to search for the model of the input/output device (i.e. IO sense command) is sent to the input/output device IO via the input/output device adapter IOA. At this time, the input/output device connected to the input/output device adapter IOA sends a return signal including the model code via the adapter IOA. The program BS-PR analyzes this return signal and uses the result as a combination table to match the input/output device adapter number and input/output device model code.
Writes to TBL (which contains no data until then). When the power is turned on for the next input/output device IO, the input/output device adapter
Since the IOA number will be notified, the same as above
It repeats the operation of sending an IO sense command and returning the model code for IO, and completes the binding table for the input/output devices that have been powered on.

This combination table TBL is also referred to when performing specific operations such as writing and reading with respect to the input/output device. On the central processing unit CPU side, only the number of the input/output device adapter IOA is known, and at that time, the corresponding input/output device IO is stored in the combination table TBL.
You can find out by referring to. That is, basic programs and application programs AP-PR other than those related to channel TMC operation can refer to the connection table TBL each time they are accessed and determine whether or not they can normally access the desired input/output device IO.

Join table TBL remains until cleared,
Until then, the relationship between the input/output device and the input/output device adapter remains via the channel TMC. Clearing is done, for example, at the time of initial operation of the channel TMC to reset it.

In this way, the connection table is not created for the input/output devices connected to the input/output device adapter at the time of designing and manufacturing the system, but is created for the input/output device adapter IOA pairs connected at that time when the terminal side is powered on. It is a table of input/output device IO. Therefore, the input/output device adapter IOA
If a failure occurs in one of the channels, the same channel
If there is a free input/output device adapter IOA in the TMC, reconnect the input/output device and turn on the power to the input/output device IO, and a new join table column will be created in the same way as described above. Each program is registered, and each program can know the input/output terminal from the model code with a predetermined function and use it to perform appropriate processing, and the input/output device IO is connected to the channel.
It is controlled via TMC to enable normal operation. At this time, there is no need to manually manipulate the join table TBL from the outside; the system can be rewritten by starting in a predetermined order, and the system cannot go down. Therefore, it is suitable for use as an intermediate control device called a cluster control section in each branch of a bank.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a conventional terminal control device and its connections, and FIG. 2 is a diagram explaining the configuration of an embodiment of the present invention. CPU...Central processing unit, CH, TMC...Channel,
IOA…I/O device adapter, IO…I/O device,
TBL...Join table, BS-PR...Basic program, AP-PR...Application program.

Claims (1)

[Scope of Claims] 1. A terminal control unit incorporating a plurality of input/output device adapters each having an adapter-specific number to which input/output devices each having a model code are connected, and a channel for collectively controlling the input/output device adapters; , a processing unit, and a rewritable table that stores the model code of the input/output device and the number of the input/output device adapter in correspondence according to the connection of the input/output device and the input/output device adapter. , in a terminal control device in which the processing unit refers to the table and controls the input/output device via the channel and the input/output device adapter, when the input/output device is powered on, the input/output device The connected input/output device adapter notifies the processing unit of the number of the input/output device adapter through the channel, and the processing unit sends a command to search for the model of the input/output device to the channel and the input/output device. sends a message to the input/output device via the adapter, detects the model code of the input/output device from the response signal of the search command, and determines the correspondence between the model code of the input/output device and the input/output device adapter number. A terminal control device characterized in that it is configured to write to a table.