JPS58182771A - Signal bus monitor system - Google Patents

Abstract

PURPOSE:To prevent the deterioration of processing capacity of a central process controller for exchange, by connecting a signal bus monitor device to a signal bus connecting the central processor and an input/output device. CONSTITUTION:Signal bus monitor devices 131 and 132 are connected to a signal bus 111 which connects a central controller 101 and input/output devices 121- 125. The monitor information collecting function of the bus 111 is separated to the devices 131 and 132 which are indepedent of the controller 101. Then the information is transferred to the controller 101 from devices 131 and 132 when the load of the controller 101 is not heavy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a communication system in an electronic switching system containing a plurality of input/output devices controlled in a program mode.

Regarding the bus monitoring method.

An electronic exchange includes a plurality of input/output devices, a central control device that controls the plurality of input/output devices in a program mode, and a signal that enables the exchange of signals between the plurality of input/output devices and the central control device. It consists of a bus,
The conventional signal bus monitoring method in this electronic exchange is
The address of the input/output device to be monitored is registered in the central controller, and the central controller identifies the address of the input/output device when exchanging signals with the input/output device, and the address is sent to the central controller. The configuration was such that only when registration was in progress, the signal was stored in the central control unit as monitor information.

Therefore, this system has the disadvantage that the processing capacity of the central control unit for exchange processing, which is the original task, is reduced.

Furthermore, if the central control unit is not operating normally, the monitor information, which should be a means of investigating the cause, has the disadvantage that it is destroyed and cannot be used effectively because it is stored in the central control unit. Ta.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a signal bus monitoring system that can overcome the above-mentioned drawbacks.

In order to achieve the above object, the signal bus monitoring system according to the present invention includes a plurality of input/output devices, a central control device that controls the input/output devices in a program mode, and a central control device that controls the plurality of input/output devices and the central control device. In a signal bus monitoring system in an electronic exchange, which is comprised of a signal bus that enables the transmission and reception of signals to and from devices under program mode control, A signal bus monitor device controlled by a plurality of transmitted commands is connected, and the signal bus monitor device connects a signal bus between each of the plurality of input/output devices and the central control device that controls each of them. The controller is configured to identify a signal sent and received via the signal bus, store the signal when it satisfies a required value, and further transfer the stored signal to the central controller via the signal bus.

According to the above configuration, the processing capacity for exchange processing within the central control unit is improved, and the monitor information can be effectively used as a means of investigating the cause in the event of an operational abnormality in the central control unit. The goal can be fully achieved.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an electronic exchange to which a signal bus monitoring system according to the present invention is applied.

In the figure, 101 is one central control device 1121-1
25 is five input/output devices) 131 and 132 are two signal bus monitor devices.

The signal bus 111 connects the central controller 101 and the input/output device 12.
1 to 125 and bus monitor devices 131 and 132, and guides the signal output from the central control device to the input/output device or signal bus monitor device 1. Also, connects the signal output from the input/output device and the signal bus monitor device. Lead to central control unit.

The signal bus monitor devices 131 and 132 are connected to the central control device 10.
1, the input/output devices 121 to 121
125 and the central control device 101, and by setting the input/output device address to be monitored by the central control device 101,
It pulls in and temporarily stores signals sent and received between input/output devices and the central control device.

In this embodiment, the signal path monitor device 131 connects the input/output device 121, and the signal bus monitor device 132 connects the input/output device 121.
2 and 123 to be monitored. From the central control unit 101 to the input/output device 1 via the signal bus 111
21-125 and signal bus monitoring devices 131.132
An example of a signal C (hereinafter referred to as a control word) sent to the control word and a response R (hereinafter referred to as a response word) from an input/output device or a signal bus monitor device to the central control unit 101 in response to the control word. C shown in FIG. 2 In FIG. 2, input/output devices 121 to 12 of the control word
5 and the signal bus monitor device 131, 132 and the signal DT indicating additional control information are transmitted from the central control device 101 to the input/output device side and the signal bus monitor device side via the multi-signal bus 111. The response status S and response additional information DR are transmitted to the input/output devices 121 to 125 and the signal bus monitor device 131.
132 is a signal transmitted to the central controller side through the multi-signal path 111. Furthermore, the signals S and DR are also transmitted from the input/output device side to the signal bus monitor device side via the signal bus 111.

FIG. 3 shows an example of the details of the additional control information (2) when a signal is transferred from the central control device to the signal bus monitor device.

In FIG. 3, the control addition @I)r is composed of a function section F indicating the type of control addition information and a monitored input/output device address section AM. An example of monitoring signals exchanged with the central control unit 101 will be explained using FIG. 1, FIG. 2, and FIG. 3.

First, based on a command from a maintenance person, the central control device 101
In the figure, the functional section F is F, (monitor registration), and the monitored input/output device address section AM is the address A of the input/output device 121.
l21 (For convenience, the address of the input/output device and the signal bus monitor device is written as A〆' 1. Sends the control word C, which becomes the address A131 of 131, to the signal bus 111. Since the signal A of the control word C is A131, the signal bus monitor device 131 pulls in the control word C, and the function part F of the signal DT becomes Fl(
Since the input/output device address AM to be monitored is A121, the input/output device 121 is placed in the monitor state. On the other hand, the response status S is set and the response word R is sent via the signal bus 111. Send to central controller.

Thereafter, the signal bus monitor device 131 also pulls in and temporarily stores the control word (1) for which the signal A is A121 and the response candy R thereto.

The monitor information temporarily accumulated in the signal bus monitor device 131 by the above method is transferred to the signal bus monitor device 131 by the same method as the signal transfer method between the central control unit and the input/output device.
It is possible to transfer the data from the central controller 101 to the central controller 101.

In this case, depending on the method of specifying the functional part F, Fl in FIG.
(transfer of all monitor information) and F4 (transfer of monitor information for one device) are possible.

In this example, for the signal bus monitor device 131, Fl
, F4, the result is the same; however, for the signal bus monitor device 132, when F4 is specified, either the input/output device 122 or 123 is specified, and when Fl is specified, the input/output device 122 . 1230 monitor information can be transferred to the central control device 101. In response to a command from the maintenance person, the central control unit 101 changes the function section F in FIG. 3 to F'2 (monitor release) and the monitored input/output device address section AM to A.
121, when the control word C in which the input/output device address field A in FIG.

FIG. 4 shows an example of means for pulling in signals in a signal bus monitor device capable of monitoring signal buses of a maximum of two input/output devices.

When the synchronization detection circuit 461 detects the synchronization signal 8TN of the control word C, it activates the gate of the flip-flop 471.

At this time, address comparators 441, 442, and 443 activate their outputs if the address information preset in each address setter 431, 432, and 433 matches signal A input from signal bus 111. Therefore, if the input signal matches the address information of one of the address setters, the OR circuit 451 is activated and the flip-flop 471 is activated.

If the input signal does not match any of the address setters 431, 432, 433, the OR gate is deactivated and the flip-flop 471 is deactivated. gate 40
1 can draw in the signal of the signal bus 111 only when the flip-flop 471 is activated.

The control unit 411 has a function of decoding and responding to the signal sequence specified with the central control unit, and also pulls in signals exchanged between the input/output device to be monitored and the central control unit, and stores the signals in the storage unit 421. Transfer to. The storage unit 421 temporarily stores the monitor information transferred from the control unit 411.

゛Although the address setter 431 has its own address set, it is easy to set a value different from other input/output device addresses and signal bus monitor device addresses using well-known means (for example, jumpering). It is possible to implement.

Further, the address of the input/output device to be monitored is set in the address setters 432 and 433, and this can be easily changed by a command from the central control unit 101.

As described in detail below, the present invention provides a signal bus monitoring information collection function for the central control device by connecting a signal bus monitor device to a signal bus that connects the central control device and input/output devices. The signal bus monitor device is separated into a separate signal bus monitor device, and the transfer from the signal bus monitor device to the central control device is performed when the load on the central control device is light. It has the effect of preventing a decline in ability.

Moreover, it is effective in providing a means for investigating the cause of abnormal operation of the central control unit without causing the monitor information to be lost.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an electronic exchange to which the signal bus monitoring system according to the present invention is applied, and FIG. 2 is an example of signals sent and received via the signal bus shown in the block diagram shown in FIG. FIG. 3 is a diagram showing a configuration example of the details of additional control information transmitted from the central control unit to the signal bus monitor device, and FIG. 4 is a diagram showing a configuration example of the signal bus monitor device shown in FIG. 1. 101...Central control unit 111...Signal bus 1
21-125...I/O device 131.132...Signal bus monitor device 401...
Gate circuit 411...Control unit 421...Storage units 431-433...Address setters 441-443...Address comparator 451...OR circuit 461...Synchronization detection circuit 471...Flip-flop Patent applicant: NEC Corporation

Claims (1)

[Claims] A plurality of input/output devices, a central control device that controls the input/output devices in a program mode, and a program mode control capable of transmitting and receiving signals between the plurality of input/output devices and the central control device. In a signal bus monitoring system in an electronic exchange comprising a signal bus, the signal bus includes a signal bus monitor device that is multi-controlled by a plurality of commands sent from the central control unit via the signal bus. The signal bus monitor device identifies the signals sent and received via the signal bus between each of the plurality of input/output devices and the central control device that controls each of them, and determines whether the signal is required. A signal bus monitor system characterized in that the signal is accumulated when a value is satisfied, and the accumulated signal is further transferred to the central control unit via the signal bus.