KR0174652B1 - Method and apparatus for data transmission in burst mode multiple monitoring method - Google Patents

Abstract

The present invention relates to a data transfer method and apparatus and more particularly to a backplane bus 1 and a master board 2, a plurality of slave boards 3 ₁ , 3 ₂ , 3 ₃ , ... 3 _n , A high-speed data transfer and sharing is possible, which is constituted by the address bus 11, the address mux 12, the BMM flag 13, the control signal converter 14, the data buffer 15, the memo pad 16 and the local CPU 17 A Burst Mode Multiple Monitoring method of transmitting data in a faster time when a plurality of processor boards share the same data in a large capacity plant controller and other industrial control devices, That is the device.

Description

Method and apparatus for data transmission in burst mode multiple monitoring method

The present invention relates to a data transfer method and apparatus, and more particularly, to a system and method for transferring the same data between a plurality of processor boards in a plant controller using a backplane bus and other industrial control devices And more particularly to a burst mode multiple monitoring (BMM) data transmission method and apparatus for enhancing transmission efficiency of redundant data when sharing.

As shown in FIG. 1, when a system is configured and the same data is shared between a plurality of slave boards and a master board, data transfer is performed according to a conventional technique in the following order. Board where the data source (Source) of the first multiple slave boards in _{(3 1, 3 2, 3} 3, ..., 3 n) ( for the example 3 ₁ or _{3 2, 3 3, ...,} 3 n times And transmits the data to the master board 2.

Secondly, after the first data transfer is completed, the same data is transferred from the master board 2 to the slave board ₃₂ . And third transmit the same data to a slave board ₍₃₃₎ on the master board (2), transmit data far master board 2 Slave board (3 _n) If the slave boards of n can share if the data do. At this time, in order to increase data transfer efficiency between the master board 2 and each slave board, a block transfer (also referred to as Burst Mode) is performed separately from the normal data transfer (a method in which the master board outputs an address for each data unit) In order to use this transfer method, an address counter is built on the slave board to receive the start address from the master board, and then the address counter on the slave board sets the address of the memory in the ascending order Restricted data transmission is done automatically.

In the conventional data transfer method, when the same data is to be shared between a plurality of slave boards 3 ₁ , 3 ₂ , 3 ₃ ,..., 3 _n and the master board 2, The number of times that the data passes through the backplane bus 1 increases as the number of slave boards increases and the time required for sharing data between the boards increases. It has great restrictions on its operation.

SUMMARY OF THE INVENTION In view of the above problems, the present invention has been made to solve the inefficiency of conventional redundant data transmission, and a data transmission method of a burst mode multiple monitoring method capable of simultaneously sharing many identical data in a short time, The present invention has been made in view of the above problems.

FIG. 1 is a configuration diagram of a system including a master board and a plurality of slave boards in a backplane bus according to the present invention; FIG.

FIG. 2 is a detailed configuration diagram of a burst mode multiple monitoring circuit according to the present invention; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

1: Backplane bus 2: Master board

3 ₁ , 3 ₂ , 3 ₃ , ... , 3 _n : Slave board 11: Address latch and counter

12: address mux 13: BMM flag

14: control signal converter 15: data buffer

16: memory 17: local CPU

In order to accomplish the above object, a data transfer method of the present invention includes a backplane bus 1, a master board 2, a plurality of slave boards 3 ₁ , 3 ₂ , 3 ₃ ,..., 3 _n , an address latch and a counter A plurality of slave boards 3 ₁ and 3 2 are provided with the address bus 11, the address mux 12, the BMM flag 13, the control signal converter 14, the data buffer 15, the memory 16 and the local CPU 17. _2, 3, _3, ..., 3 _n) and between the master board (2) for the data transfer method of sharing data, the master board (2), each slave board (3 _1, 3 _2, 3 _3, ..., 3 _n ) of the slave boards 3 ₁ , 3 ₂ , 3 ₃ ,..., 3, and the address to start the block transfer to the counter 11, the flag of the BMM _n) enable (enable), the second step, the master board (2) a read operation on the slave board to be a source (source) of the data (read Cycle) the whole of the shared data required to proceed to The write cycle is performed by the control signal converter 14 in each slave board except for the slave board which is the source of the data and the content of the data bus on the backplane bus 1 is accepted into the memory 16 The address latch and counter 11 automatically increase the address value to be applied to the memory of the slave board and increase the value each time the unit operation (1 cycle) is finished. A fourth step of preparing for transmission, and a third step of repeating the steps of the third and fourth steps in a unit cycle (1 cycle) as many times as necessary.

The value of the address latch and counter (11) is automatically increased to perform block transfer.

In addition, the data transfer apparatus of the present invention stores and generates an address to be added to the memory of the slave board while performing the burst mode multiple monitoring (BMM) by being connected to the backplane bus 1, and after every unit operation (1 cycle) An address latch and counter 11 for automatically incrementing a value and an address latch and a counter 11 for operating an address signal of the backplane bus 1 in a burst mode multiple monitoring (BMM) mode as an address to be added to the memory of the slave board, A read cycle 12 is performed on the backplane bus 1 by the master board 2 in the burst mode multiple monitoring (BMM) mode. A control signal converter 14 for converting the write cycle into a write cycle in the slave board to control the memory 16, a burst mode multiple monitoring (BMM) mode A data buffer 15 connected to the control signal converter 15 for distinguishing between a burst mode multiple monitoring (BMM) mode and a normal data transfer mode, A BMM flag 13 for notifying the address latch and counter 11 and the address address 12, a memory 16 for storing data, and a local CPU 17 for calculating data.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method of transmitting data in a burst-mode multiple monitoring system according to the present invention and its operation will be described in detail with reference to the accompanying drawings.

FIG. 2 is a detailed block diagram of a burst mode multiple monitoring (BMM) circuit according to the present invention, wherein a burst mode multiple monitoring (BMM) data transfer method according to the present invention is implemented by a burst mode multiple monitoring (E.g., a third slave board) to the master board 2, and at the same time, all the other slave boards that require the same data are connected to the backplane bus 1 (a plurality of addresses, data, (A common connection path having a control signal and a power line) is monitored and accepted (Multiple Monitoring). Secondly, in order to increase the data transmission efficiency, a method of block transmission combining the above method is used (Burst Mode). Therefore, when it is necessary to share the same data between a plurality of slave devices and a master board, The number of times is reduced to 1 / n, and data transmission and sharing are performed at high speed.

In order to implement the BMM data transfer method according to the present invention, each slave board sends out data during the read cycle by the master board 2 on the backplane bus 1 But it must be able to proceed with the accept write operation (Write Cycle). Of course, the board that is the source of the data (e.g. 3 ₁ slave board) must put the data on the backplane bus 1.

In order to enable block transfer, the address value of the memory 16 of the slave board must be automatically increased.

The role of each circuit part in the second figure is as follows. First, the address latch and counter 11 stores and generates an address to be added to the memory of the slave board while the burst mode multiple monitoring (BMM) is performed, and automatically increments the value every time a unit operation (1 cycle) Second, the address latch 12 is an address to be added to the memory of the slave board. When the address signal of the backplane bus is normally operated in the burst mode multiple monitoring (BMM) mode, the address latch and the value of the counter 11 are selected . Thirdly, the control signal converter 14 performs a read operation (Read Cycle) on the backplane bus 1 by the master board 2 in the burst mode multiple monitoring (BMM) mode, A data buffer 15 for controlling the memory 16 to be converted into a write cycle, a data buffer 15 for making a direction in which data passes in a direction opposite to a normal direction when the fourth mode is the burst mode multiple monitoring (BMM) mode, There is a BMM flag 13 which is connected to the control signal converter 14 to distinguish between the burst mode multiple monitoring (BMM) mode and the normal data transfer mode to notify the address latch and counter 11 and address address 12, And a local CPU 17 for calculating data of the internal data of the slave board and a burst mode multiple monitoring (BMM) data processor 16, It is carried out in five steps as follows:

[Step 1]

The master board 2 writes the addresses to start address transfer to the slave boards 3 ₁ , 3 ₂ , 3 ₃ , ... 3 _n and block transfer to the counter 11.

[Second Step]

The master board 2 enables the BMM flag 13 of each of the slave boards 3 ₁ , 3 ₂ , 3 ₃ , ..., 3 _n .

[Third Step]

The master board 2 proceeds a read cycle to a slave board (for example, 3 ₁ or 3 ₂ , 3 ₃ , ..., 3 _n times) as a source of data, And starts the transfer operation. At this time, in each slave board (except for the slave board which is the source of the data), the write cycle is performed by the control signal converter 14 so that the contents of the data bus on the backplane bus 1 are transferred to the memory 16 ).

[Step 4]

At the end of the third step, the address latch and counter 11 automatically increases the address value to be added to the memory of the slave board, and prepares for the next transmission by incrementing the value every one cycle (1 cycle).

[Step 5]

The third step and the fourth step are repeatedly executed in the required number of times per cycle (1 cycle).

As described above, in the burst mode multiple monitoring (BMM) data transfer method and apparatus of the present invention, when it is necessary to share the same data between a plurality of slave boards (n) and a master board, It is possible to perform data transmission and sharing at a higher speed than when sharing the same data among a plurality of processor boards in a large-capacity plant controller and other industrial control devices.

Claims (3)

A backplane bus (1) and a master board (2), a plurality of slave boards _{(3 1, 3 2, 3} 3, ..., 3 n), the address latch and the counter 11, the address meokseo (12), BMM flag (13 ), the control signal converter 14, a data buffer 15, memory 16 and a plurality of slave boards (3 _1, 3 _2, 3 _3, and includes a local CPU (17), ..., 3 _n) and a master board (1), the master board (2) sends address latches of the respective slave boards (3 ₁ , 3 ₂ , 3 ₃ , ..., 3 _n ) A first step of recording an address at which a block transfer is to be started and a step of enabling the master board 2 to enable a BMM flag of each of the slave boards 3 ₁ , 3 ₂ , 3 ₃ , ..., 3 _n In the second step, the master board 2 carries out a read cycle (Read Cycle) to the slave board which is the source of the data, starts the transmission of the necessary shared data, A third step in which a write cycle is performed by the control signal converter 14 in each of the slave boards to receive the contents of the data bus on the backplane bus 1 into the memory 16, The address latch and counter 11 automatically increases the value of the address to be applied to the memory of the slave board and increases the value each time the unit operation (1 cycle) is finished, , And repeats the process of the four steps in the required number of times per cycle (1 cycle). The method according to claim 1, wherein the value of the address latch and counter (11) is automatically increased to perform block transfer. An address latch that is connected to the backplane bus 1 to store and generate an address to be added to the memory of the slave board while performing burst mode multiple monitoring (BMM), and automatically increases the value every time a unit operation (1 cycle) (1) signal of the backplane bus 1 as an address to be added to the memory of the slave board in the burst mode multiple monitoring (BMM) mode, the value of the address latch and the counter 11 And a write cycle (Read Cycle) on the backplane bus (1) by the master board (2) in the burst mode multiple monitoring (BMM) A control signal converter 14 for converting the data into a write cycle and controlling the memory 16, a control signal converter 14 for controlling the memory 16 in a burst mode multiple monitoring (BMM) A data buffer 15 connected to the control signal converter 14 for distinguishing between a burst mode multiple monitoring (BMM) mode and a normal data transfer mode so that the address latch and counter 11 And a local CPU (17) for calculating data, a BMM flag (13) notifying the address prefix (12), a memory (16) for storing data, and a local CPU (17) for calculating data.