JPH055416B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a communication control device that is connected to a central processing unit and has a plurality of line connection mechanisms, and in particular, the present invention relates to a communication control device that is connected to a central processing unit and has a plurality of line connection mechanisms. The present invention relates to a communication control device that can perform switching economically and without stopping the entire system.

[Conventional technology]

Conventionally, when a failure occurs in a communication control device that has multiple line connection mechanisms, it is necessary to turn off the power to that communication control device and manually replace the failed line connection mechanism with a normal line connection mechanism. Either one of two methods has been adopted, in which a line switching device is used to switch the line connection mechanism in a pre-prepared standby communication control device.

[Problem that the invention seeks to solve]

However, the above method has the problem that even if there is a limited failure in only one line, all other normal lines of the communication control equipment must be stopped, and in the worst case, it may lead to system failure. This method increases system construction costs because it is necessary to prepare a backup communication control device.
There were problems such as increased floor space and increased power consumption.

The present invention solves these conventional problems, and its purpose is to provide an economical configuration for switching from a faulty line connection mechanism to a healthy line connection mechanism without stopping the entire system. The purpose of the present invention is to provide a communication control device that can perform the following operations.

[Means for solving problems]

In order to solve the above problems, the present invention provides a plurality of line connections, each of which is assigned a predetermined line number and connected to communication lines 1-0 to 1-n, as shown in the principle explanatory diagram of FIG. 1, for example. A communication control device 4 having mechanisms 2-0 to 2-n and connected to the central processing device 3
, a first line indicating the presence or absence of conversion corresponds to the line number assigned to each line connection mechanism 2-0 to 2-n.
information, second information indicating whether the line connection mechanism with the line number is healthy or in failure, third information indicating whether the line connection mechanism with the line number is in use or unused, and It has a rewritable storage means that holds the converted line number, and stores the specified line number input from the communication lines 1-0 to 1-n or the central processing unit 3 in response to a communication request. Using a line number conversion means 5 that converts the designated line number into a converted line number stored in the storage means, and a line connection mechanism having the line number converted by the line number conversion means 5, a control means 6 for controlling communication of the communication request between the communication line connected to the line connection mechanism and the central processing unit 3; and first to third information stored in the storage means and the converted line number. and display means 7 for displaying the information corresponding to each line connection mechanism, and when a failure occurs in the line connection mechanisms 2-0 to 2-n, the control means 6 is configured to display the information assigned to the line connection mechanism in which the failure has occurred. the first line number of the storage means corresponding to the line number
information to indicate that conversion has been performed, the second information to information to indicate that there is a failure, and the converted line number to the line number assigned to the unused line connection mechanism. The third information in the storage means corresponding to the line number assigned to the line connection mechanism in use is changed to information indicating that it is in use.

[Effect]

Now, change the line numbers of communication lines 1-0 to 1-n from 0 to
n, and the line numbers assigned in advance to the line connection mechanisms 2-0 to 2-n connected to these communication lines are 0 to n as shown in the figure, and all the line connection mechanisms 2-0 to 2 -n is healthy and only the line connection mechanism 2-n is reserved as a spare line connection mechanism. Initially, the storage means in the line number conversion means 5 stores each line connection mechanism. The following data is stored corresponding to line numbers 0 to n assigned to 2-0 to 2-n.

The first information indicating the presence or absence of conversion is stored for all line numbers.

As the second information indicating whether or not the line connection mechanism having the line number is healthy, information indicating that all line numbers are healthy is stored.

The third information indicating whether the line connection mechanism with the line number is in use or unused is information indicating that line number n of the spare line connection mechanism 2-n is unused, and information indicating that the line connection mechanism with the line number n of the backup line connection mechanism 2-n is unused; Information indicating that the number is in use is stored for the number.

The same line number is stored as the line number after conversion.

In a situation where the storage means has the above contents, the central processing unit 3 stores, for example, line number 0.
When communication is requested to the communication line 1-0, the line number conversion means 5 converts the specified line number 0 inputted from the central processing unit 3 in response to the communication request by referring to the storage means. However, in this case, the converted line number is also 0, so no actual conversion is performed, and the same line number 0 input from the central processing unit 3 is input to the control means 6, and the control means 6 The line connection mechanism 2-0 having the line number 0 is used to process a communication request from the central processing unit 3 to the communication line 1-0 having the line number 0.

Similarly, for example, when a communication request is made from the communication line 1-0 to the central processing unit 3, the line number conversion means 5 stores the specified line number 0 input from the communication line 1-0 in response to the communication request. Convert by referring to the means, but in this case the same line number 0
is obtained as the conversion result. Therefore, the control means 6
processes a communication request to the central processing unit 3 from the communication line 1-0 using the line connection mechanism 2-0 having the line number 0.

Next, for example, line connection mechanism 2 with line number 0
If a failure occurs in -0, the control means 6 will:
The first information in the storage means corresponding to the line number 0 assigned to the line connection mechanism 2-0 in which the failure has occurred is converted to information indicating that conversion has been performed, the second information is converted to information indicating that there is a failure, and the second information is converted to information indicating that there is a failure. The converted line number is the line number n assigned to the spare line connection mechanism 2-n.
At the same time, the third information in the storage means corresponding to the line number n assigned to this spare line connection mechanism 2-n is changed to information indicating that it is in use.

The display means 7 displays the first to third information stored in the storage means and the converted line number corresponding to each of the line connection mechanisms 2-0 to 2-n, so that When the content is changed as described above, the display content on the display means 7 is also changed in the same way. That is, the first information of the display contents corresponding to line number 0 of the line connection mechanism 2-0 is changed to information indicating that conversion has been performed, the second information is changed to information indicating that there is a failure, and the converted line The number is changed to n, and the third information of the display content corresponding to the line number n of the line connection mechanism 2-n is converted to information indicating that it is in use.

With this, operators etc. can
It can be seen that -0 has become unusable due to a failure and has been switched to line connection mechanism 2-n.

Therefore, when an operator or the like disconnects the communication line 1-0 from the line connection mechanism 2-0 and connects it to the line connection mechanism 2-n instead of the communication line 1-n, the central processing unit 3 and the communication line 1-0 Communication between them can be carried out without any trouble using the line connection mechanism 2-n.

That is, for example, from the central processing unit 3 to the communication line 1-
When a communication request for 0 is made, the line number 0 inputted with the communication request is converted to n by the line number conversion means 5, so the control means 6 converts the line number 0 inputted with the communication request to n. -n is used to control communication between the central processing unit 3 and the communication line 1-0.

〔Example〕

FIG. 2 is a system configuration diagram of an embodiment of the present invention, in which the central processing unit 10 including the input/output channel controller 11, and the line interface line 101-
A plurality of line connection mechanisms 13-1 to 13- connected to communication lines (not shown) via 1 to 101-8.
8 and a communication control device 12 are interconnected through an input/output channel 100.

FIG. 3 is a block diagram of an embodiment of the communication control device 12, which controls the microprocessor 20, memory 21, and input/output channel 100 to exchange data with the input/output channel controller 11. an input/output channel adapter 22 to execute;
The line connection mechanisms 13-1 to 13-8 are connected to the bus 200.
A display panel 23 is connected to the microprocessor 20.

Furthermore, FIG. 4 shows the microprocessor 2 of FIG.
3 is a block diagram of an embodiment of a line number conversion circuit in 0, 30 is a data register, 31, 33
is a line number register, 32 is a line number conversion register file, 34 is a priority selection circuit, 35,3
7 is an interrupt line number register, 36 is an interrupt line number conversion register file, 38 is a multiplexer (MPX), and 300-1 to 300-8 are line interrupt lines. The line number conversion register file 32 and the interrupt line number conversion register file 36 each have addresses 0 to 7, and address n (n=0 to 7).
Each corresponds to the line connection mechanism 13-(n+1) and has a storage area for bits 0 to 7. Of these, bit 0 is a conversion bit that indicates whether the line number of the line connection mechanism is converted or not, bit 1 is a valid bit that indicates whether or not the line connection mechanism is healthy, and bit 2 is the conversion bit that indicates whether the line connection mechanism is healthy. Unused/spare bits, bits 3 to 3, indicating whether the mechanism is actually used or unused or spare.
Bit 7 is used as a line number area indicating the converted line number.

2 to 4, before the line is actually used, various control tables and transmission/reception buffers are initialized for each line in the memory 21 of the communication control unit 12 from the host device, that is, the central processing unit 10. Ru. In addition, at the time of initial setting, the line connection mechanism 13-1 to 1
A diagnostic program is started to check whether or not 3-8 is operating normally, and the sequential line connection mechanism 13
-1 to 13-8 are diagnosed. If this diagnosis is normal, "1" is written in the bit 1 area of the corresponding address in the line number conversion register file 32 and interrupt line number conversion register file 36, indicating that a failure has been detected. “0” if
is written. At the same time, predetermined information is written into the conversion bits, unused/reserve bits, and line number areas of the line number conversion register file 32 and the interrupt line number conversion register file 36.

FIG. 5 shows the line number conversion register file 32 and the interrupt line number conversion register file 36 before a failure occurs in the line connection mechanisms 13-1 to 13-8.
This is a diagram showing an example of the internal storage state of , and since all line connection mechanisms are healthy, each address
Bit 1 of address 7 is set to "1", and bit 2 of address 7 is set to "1" in order to make only line connection mechanism 13-8 an unused/spare line connection mechanism. Also, the line number area (bit 3~
Bit 7) includes each line connection mechanism 13-1 to 13-
Since the line number pre-assigned to 8 is set as a binary number and there is initially no line connection mechanism to convert the line number, all conversion bits (0 bits) are set to "0".

Also, FIG. 6 shows the line number conversion register file 32 and the interrupt line number conversion register file 36.
23 is a plan view showing a display example of the display panel 23 that displays the internal storage state of the display portions 23-1 to 23.
-8 are line connection mechanisms 13-1 to 13-8 respectively
It corresponds to Each display part 23-1 to 23-8
has a total of 8 display elements, and bit 0, bit 1, . . . of files 32 and 36 from the top, respectively.
The stored information of bit 7 is shown, and a black circle corresponds to "1" when the light is on, and a white circle corresponds to "0" when the light is off. The information displayed on the display panel 23 can be obtained by switching the multiplexer 38 to the internal bus side in FIG. 4, sequentially inputting addresses 0 to 7 to the line number register 31, and reading all contents of each file 32, 36. is acquired and sent to the display panel 23.

Now, if a communication request is generated from the central processing unit 10 to, for example, the line interface line 101-1, the line number ("0000" in binary) of the line connection mechanism 13-1 connected to the line interface line 101-1 is generated. ) is input to the communication control device 12 via the input/output channel 100 along with the communication request. This line number "0000" is taken into the microprocessor 20 via the input/output channel adapter 22 and bus 200 shown in FIG. It is set in number register 31. Therefore, the line number "00000" stored in bits 3 to 7 of the address "0000" of the line number conversion register file 32 is read out, and the line number register 3
It is set to 3. The microprocessor 20 is
The line number set in the line number register 33 is read via an internal bus (not shown), and since it is "00000", the line connection mechanism 13-1 with that line number is activated, and the input/output channel adapter is activated. 22 and the line interface line 101-1 are connected via the line connection mechanism 13-1, and predetermined communication control is performed thereafter.

Also, for example, the line interface line 101-1
When a communication request is made to the central processing unit 10 from a communication line connected to the communication line connected to the communication line 300-1 in FIG. 1 to the priority selection circuit 34. The priority selection circuit 34 is connected to each line connection mechanism 13-1.
Line interrupt lines 300-1 to 300-3 corresponding to ~13-8
00-8 is a circuit that selects one of the interrupts based on a predetermined priority when a plurality of interrupts occur at the same time. When the line number "0000" is accepted by the priority selection circuit 34, it is set in the interrupt line number register 35 via the multiplexer 38. Therefore, the contents of the address "0000" of the interrupt line number conversion register file 36 are read out, and "00000" is set in the interrupt line number register 37. Microprocessor 2
0 activates the line connection mechanism 13-1 with the line number set in the interrupt line number register 37, connects the line interface line 101-1 and the input/output channel adapter 22, and responds to the request. Control communications.

After the line is actually in use as described above, if a failure occurs in the line connection mechanism 13-1, for example, the microprocessor 20 starts a program for failure recovery. When it is determined that the faulty line connection mechanism is the line connection mechanism 13-1, the following process is automatically performed.

First, the microprocessor 20 switches the input of the multiplexer 38 to the internal bus side, sets "10000111" in the data register 30, and sets the line number register 31 and the interrupt line number register 3.
5 to "0000" and change the write information at address 0 of the line number conversion register file 32 and interrupt line number conversion register file 36 from the initial "01000000" to "10000111" as shown in FIG.
, and sets that the line number of the line connection mechanism 13-1 is converted and that the converted line number is line number "0111". Next, set "01000111" in the data register 30, set "0111" in the line number register 31 and the interrupt line number register 35, and set the line number conversion register file 32 and the interrupt line number conversion register file 3.
The write information of address 7 of 6 is changed from the initial “01100111” to “01000111” as shown in Figure 7.
, and set that the line connection mechanism 13-8 is actually used. Then, a message to the effect that a failure has occurred and the line connection mechanism 13-1 cannot be used, and a backup line connection mechanism 13-8 has been used instead is notified to the operator, and the line number conversion register file 32 is
Alternatively, the contents stored in the interrupt line number conversion register file 36 are read out and the contents displayed on the display panel 23 are changed from FIG. 6 to FIG. 8.

The message and the display status of the display panel 23, that is, 1 bit of the display part 23-1 corresponding to the line connection mechanism 13-1 changes from "1" to "0", and the 3rd to 7th bits change from "00000" to "00111". '', the operator can easily know that the line connection mechanism 13-1 has become unusable due to a failure and has been switched to the line connection mechanism 13-8. In the trouble recovery work, the operator confirms the above display and connects the line interface line 101- to the line connection mechanism 101-8.
Communication line and line connection mechanism 1 connected via 8
The communication line connected to 3-1 via the line interface line 101-1 is completed by, for example, exchanging the line interface lines 101-1 and 101-8. Note that when switching this communication line, the effect of the switching is on the line connection mechanism 13-1, 1.
Since it stops at 3-8 and does not reach the bus 200, the communication control device 12 can be left in the on state without turning off the power. Therefore, communication lines can be switched without stopping the operations of the other line connection mechanisms 13-2 to 13-7 that are normally operating.

After the contents of the line number conversion register file 32 and the interrupt line number conversion register file 36 have been changed as described above and the repair work has been completed, for example, a communication request from the central processing unit 10 to the line interface line 101-1 is made. If this occurs, the line number "0000" input with the request is set in the line number register 31, and the line number "00111" is read from the line number conversion register file 32. That is, "0000" of the designated line number is converted to "00111". This “00111”
is set in the line number register 33, and the microprocessor 20 starts the line connection mechanism 13-8 based on the contents, and connects the input/output channel adapter 11 of the central processing unit 10 to the input/output channel adapter 22 and the line connection mechanism 13. -8 to connect to line interface line 101-1. Since the contents of the interrupt line number conversion register file 36 have been converted in the same way as the line number conversion register file 32, a communication request to the central processing unit 10 is generated from the communication line connected to the line interface line 101-1. In this case, the line number "0000" associated with the request is converted to "00111", and the line interface line 101-1 is connected to the input/output channel adapter 22 and the central processing unit 1 via the line connection mechanism 13-8.
Connected to 0. In both cases, the line number sent from the central processing unit 10 in response to a communication request,
The line number sent from the line interface line 101-1 in response to a communication request is not changed, and the original line number can be used. There is no need to change.

〔Effect of the invention〕

As explained above, according to the communication control device of the present invention, when a failure occurs in a certain line connection mechanism,
The information stored in the storage means in the line number conversion means is changed by the control means so that an unused spare line connection mechanism is used instead of that line connection mechanism, and the contents of the changed storage information are displayed. Since the information is displayed on the display means, the operator, etc. can quickly recognize which communication line should be reconnected to which line connection mechanism from the display contents of the display means, and perform necessary reconnection of the communication line. By this, 1
Even when a limited line failure occurs in the line connection mechanism, the entire system does not have to be stopped like in the conventional method, and there is no need to prepare a backup communication control device as in the conventional method. With an economical configuration, there is an effect that a faulty line connection mechanism can be switched to a healthy line connection mechanism. The communication control device of the present invention also provides information stored in the storage means in the line number conversion means so that when a failure occurs in the line connection mechanism, an unused spare line connection mechanism is used in place of the failed line connection mechanism. It is assumed that the communication line connection change will be done manually by an operator, etc., but by manually changing the communication line connection instead of automating it, it will take some time to recover. Although it takes time, since a mechanism for automatic connection change is not required, the cost of the communication control device can be reduced.
Furthermore, by changing the connection of the communication line, the line number sent from the central processing unit in response to a communication request and the line number sent from the communication line in response to a communication request will not change, and the original line number will remain unchanged. The advantage is that there is no need to change the software or firmware interface.

[Brief explanation of the drawing]

FIG. 1 is a diagram explaining the principle of the present invention, FIG. 2 is a system configuration diagram of an embodiment of the present invention, FIG. 3 is a block diagram of an embodiment of the communication control device 12 shown in FIG. FIG. 5 is a block diagram of an embodiment of the line number conversion circuit in the microprocessor 20 shown in FIG. A diagram showing an example of the internal logical state of the integrated line number conversion register file 36, FIG.
Figure 7 shows an example of the display on the display panel displaying the line numbers of the line connection mechanisms and the status of the related line connection mechanisms before the failure occurred in line connection mechanisms 13-1 to 13-8. A diagram showing an example of the internal logical state of the line number conversion register file 32 and the interrupt line number conversion register file 36 in FIG. 3 and FIG. FIG. 7 is a diagram illustrating an example of a display on a display panel displaying the line number of the line connection mechanism and the related line connection status after a failure occurs in the line connection mechanism 13-1. In the figure, 10 is a central processing unit, 11 is an input/output channel controller, 12 is a communication control device, 13-1 to 13-8 are line connection mechanisms, 20 is a microprocessor, 21 is a memory, and 22 is an input/output channel. Adapter, 30 is data register, 3
1 and 33 are line number registers, 32 is a line number conversion register file, 34 is a priority selection circuit,
35 and 37 are interrupt line number registers, 36 is an interrupt line number conversion register file, 38 is a multiplexer, 100 is an input/output channel, 101-1 to
101-8 is a line interface line, 200 is a bus, and 300-1 to 300-8 are line interrupt lines.

Claims (1)

[Scope of Claims] 1. In a communication control device having a plurality of line connection mechanisms, each of which is assigned a predetermined line number and connected to a communication line, and connected to a central processing unit, Corresponding to the given line number, first information indicating the presence or absence of conversion, second information indicating whether the line connection mechanism with that line number is healthy or faulty, and the line with that line number. A third indicator that indicates whether the attachment is in use or not.
and a rewritable storage means for holding the converted line number and the converted line number; a line number conversion means for converting the line number into a converted line number stored in the storage means in response to the line number conversion means; and a line connection mechanism using the line connection mechanism having the line number converted by the line number conversion means. control means for controlling communication of the communication request between a communication line connected to the central processing unit; and a control means for controlling communication of the communication request between the communication line connected to the central processing unit; and display means for displaying information corresponding to
The first information in the storage means corresponding to the line number assigned to the line connection mechanism in which the failure has occurred is converted to information indicating that the line connection mechanism has been converted, the second information is converted to information indicating that the line connection mechanism is in failure, and the line after the conversion is changed. changing each number to a line number assigned to an unused line connection mechanism, and information indicating that the third information in the storage means corresponding to the line number assigned to the unused line connection mechanism is in use. A communication control device characterized by having a configuration that changes to. A communication control device comprising display means for displaying conversion information of the line number conversion means corresponding to each line connection mechanism.