JPH0666822B2 - Line expansion method - Google Patents

Description

TECHNICAL FIELD The present invention relates to an extension system of a line control device.

(Prior Art) A configuration of a conventional line control system is shown in FIG. In the figure, CP is a control processor device, LNCH is a line channel device, LUP _{0 to} LUP _m are a plurality of line control devices, and the line channel device LNCH is a control processor device C.
Connected to P, and line control devices LUP _{0 to} LUP _m
Were respectively connected to the line channel devices LNCH. The line control devices LUP _{0 to} LUP _m are composed of a line unit control device LUC and a large number of line unit devices LU _{0 to} LU _n controlled by the line unit control device LUC.

The line channel device LNCH can connect a plurality of line control devices LUP depending on the line scale. When the number of lines to be controlled, that is, the line unit device LU is increased, the line control device LUP is increased. It was

(Problems to be Solved by the Invention) However, each line control device LUP requires a line unit control device LUC, and the line unit control device LUC controls a maximum of N lines, that is, N line unit devices LU. However, there is a limit to the size of the mounting unit, and the line unit device LU for N lines is not necessarily 1
It could not be installed in one line control device LUP.

Therefore, each line unit control device LUC has a circuit that is not used, and the lines that cannot be mounted are treated as a missing number, and the more the number of additional lines becomes, the more uneconomical the configuration becomes. It was

The present invention has been made in order to eliminate such a problem, and an object thereof is to provide a line extension system that allows economical extension.

(Means for Solving Problems) In order to solve the above problems, in the present invention, in a line extension system in which a line controller having a large number of line unit devices is added, the upper bits are the same and the lower bits are the same. A plurality of line control devices having a large number of line unit devices with line reference numbers different only in bits are provided, and a rotary unit control device is provided in one of the plurality of line control devices, and another line control device is added. The circuit unit control unit is connected to the line unit control unit through means for replacing the upper several bits of the line collation number information from the line unit control unit for each line control unit.

(Operation) According to the present invention, the line control device, that is, the line can be added only by connecting the line control devices having the similar line reference numbers through the line reference number information rewriting means.

(Embodiment) FIG. 1, FIG. 3 and FIG. 4 show an embodiment of the method of the present invention, in which LUP0 to LUP3 are line controllers and LUC is a line attached to the line controller LUP0. A unit control device, M is a buffer circuit in the line unit control device LUC, A1 and A2 are connection circuits that control signal exchange with the extension unit, and B1, B2 and B3 are connection circuits A.
Connection circuits for transmitting and receiving signals from A1 and A2, LU0 to LU
Reference numeral 15 is a line unit device corresponding to each line (not shown).

The line control devices LUP0, LUP1, LUP2, LU
P3 is a line unit device LU0 to LU3, LU to which a certain number of upper bits are the same and only a few lower bits are different, to which a line collation number based on a binary number of 5 digits is attached.
It has 4 to LU7, LU8 to LU11, and LU12 to LU15, respectively. As an example, here, the line collation numbers of the line unit devices LU0, LU4, LU8, LU12 are "00000", and the line unit devices LU1, LU
The line collation numbers of 5, LU9 and LU13 are "0000
1 ", line unit devices LU2, LU6, LU10, L
The line collation number of U14 is "00010", and the line unit devices LU3, LU7, LU11. The line collation number of LU15 is "00011".

The line control device LUP0 includes a connection circuit A1, the line control device LUP1 includes a connection circuit B1, the line control device LUP2 includes connection circuits A2 and B2, and the line control device LUP3 includes a connection circuit B3.

Buffer circuit M and connection circuits A1, A2, B1 to B
3 comprises means for replacing the upper several bits of the line collation number information for each line control device and means for controlling an interrupt from each line unit device side. First, the former will be described with reference to FIG. To do.

That is, the buffer circuit M includes two gate circuits, the connection circuits A1 and A2 include two inverters, and the connection circuits B1, B2, and B3 include one gate circuit and one gate circuit.
And an inverter. The gate circuit is a circuit for sending a binary number as it is, and may be a commonly connected two inputs of well-known AND circuit and OR circuit.

The buffer circuit M connects the upper 2 bits of the line collation number information from the line unit controller LUC to the connection circuit A1.
And B2. Further, the connection circuit A1 sends its output to the connection circuit B1. The output of the connection circuit B2 is sent to each line unit device of the line control device LUP2, and is also sent to the connection circuit B3 via the connection circuit A2.

It should be noted that the line unit control device L is passed from a control processor device (not shown) via a line channel device (not shown).
Programs required for communication control are transferred to UC,
Communication control is performed according to the program. Also,
Here, signal lines for data, addresses, etc. are omitted for convenience of drawing.

Next, the operation will be described. For example, when data is sent to the line with the number "0", that is, the line unit device LU0, the line collation number information corresponding to the line to be transmitted from the line unit control LUC, that is, "00000", and the data to be transmitted. The data is sent from the buffer circuit M to each device.

The line collation number information is sent as it is to each line unit device of the line control device LUP0.
The connection circuit B1 logically converts it to each line unit device of UP1 and sends it as information "00100". Similarly, it also sends it to each line unit device of the line control device LUP2 as information "01000" by the connection circuit B2. Further, the information “01100” is sent to each line unit device of the line control device LUP3 by the connection circuits A2 and B3.

As described above, the line unit devices LU4, LU8, L
The line collation number of U12 is also "00000", but the given information is "00100" and "0100", respectively.
0 "and" 01100 ". Therefore, in each of the line unit devices LU0 to LU15, only the line unit device LU0 has the same line collation number as the above information, and the data is transferred to the line unit device LU0. To be done.

Conversely, to select a line unit device, for example LU4,
If line (collation number) information "00100" is sent from the line unit controller LUC, the information is converted to "00000" via the connection circuit B1, and the line controller LUP
No. 1 is given to each line unit device and matches the collation number of the line unit device LU4. Correspondence between such line information and the operating line control device is shown in FIG.

In this way, the line control devices LUP0, LUP1, LUP
2, the line unit devices of LUP3 are the same, and the data to be collated are the same, but such a replacement circuit makes it possible to select the only line unit device, and the same line unit device can be selected. Can be expanded.

Next, the interrupt control will be described with reference to FIG.

In the line control device configuration described above, the connection circuits A1, A
2, B1 and B3 are provided with four (the number corresponding to the number of lines in the line control device) inverters, and the connection circuit B2 and the buffer circuit M are provided with eight inverters. The interrupt lines INT0 to INT3 of the line control device LUP0 are sent to the line unit control device LUC as they are. The interrupt lines INT0 to INT3 of the line control device LUP1 are connected to the interrupt lines INT4 to INT7 of the line unit control device LUC via the inverters of the connection circuits B1 and A1. Also, the interrupt lines INT0 to INT0 of the line control device LUP2
INT3 passes through the connection circuit B2 and the inverter of the buffer circuit M, and interrupt line I of the line unit controller LUC.
Connected to NT8-INT11, and line controller LU
The interrupt lines INT0 to INT3 of P3 are connected to the connection circuits B3 and A.
2, B2 and the inverters of the buffer circuit M, the interrupt lines INT12 to IN of the line unit controller LUC
It is connected to T15.

Note that the interrupt line is a signal line for notifying the line unit control device LUC in order to request the fetching of the data when the data is received from the terminal device (not shown) connected to the line unit device LU. The line unit control device LUC that received this notification identifies the line (line unit device) that has interrupted by the interrupt line number (position), and processes the data for this.

As described above, the interrupt lines in the line control devices LUP0 to LUP3 are common, but the individual line unit devices can be selected by individually drawing the interrupt lines into the line unit control device LUC. Become.

(Effect of the Invention) As described above, according to the present invention, a line unit device having the same line collation number can be provided in each line control device, and the line unit control device can control the line unit device having the maximum control number. It is possible to control, and therefore, there is an advantage that an economical line control device can be added.

[Brief description of drawings]

FIGS. 1, 3 and 4 show an embodiment of a line extension system of the present invention. FIG. 1 is an explanatory view showing a line information re-reading means of a line control device, and FIG. FIG. 3 is a diagram showing a connection state in the line control device, FIG. 3 is an explanatory diagram showing a relation between line information and operating devices, and FIG. 4 is an explanatory diagram showing interrupt means of the line control device. LPU0 to LUP3 ... Line control device, LUC ... Line unit control device, LU0 to LU15 ... Line unit device, M ... Buffer circuit, A, B ... Connection circuit, IN
T0 to INT15 ... Interrupt signal line.

Continuation of the front page (56) Reference JP-A-60-72450 (JP, A) JP-A-56-136062 (JP, A) JP-A-58-60347 (JP, A) JP-A-60-17554 (JP , A)

Claims (1)

[Claims] 1. A line expansion system for expanding a line control device having a large number of line unit devices, wherein a number of line unit devices having the same number of upper bits but different only in the lower bits are provided. A plurality of line control devices are provided, and a line unit control device is provided in one of the plurality of line control devices, and another line control device to be added is set to several bits higher than the line collation number information from the line unit control device. The line extension system is characterized in that it is adapted to be connected to the line unit control device through a means for replacing each line control device corresponding to each line control device.