KR20040027685A - Common bus backplane system of controller for slot id auto detection - Google Patents

Abstract

PURPOSE: A backplane system having an automatic slot detecting function on a control device using a bus method is provided to make no need to set a slot ID to respective modules by adding the backplane to set the slot ID. CONSTITUTION: A main backplane(100) provides a common bus such as a data bus, an address bus, and a control signal bus, and includes the slots for mounting the modules(300). A sub backplane(200) has additional slots for providing the slot ID to the modules and a slot ID setting part for setting the slot ID to each slot. Respective modules have a comparator(330) outputting an effective address signal in case that the slot ID inputted from the sub backplane is agreed with the address inputted from the main backplane.

Description

COMMON BUS BACKPLANE SYSTEM OF CONTROLLER FOR SLOT ID AUTO DETECTION}

The present invention relates to a backplane system for achieving a desired control function by combining a plurality of modules performing each unique function, and more particularly, to a backplane system of a controller capable of automatically providing a slot ID. .

In general, large controller systems or devices are implemented in the form of SHELFs mounted in standard racks (19-inch racks), each of which has a slot (SLOT) for mounting multiple modules. ) Is included. That is, when a single controller system is configured by combining various types of modules performing unique functions, one of several types of information exchange between modules uses a common bus method using a backplane.

1 is a schematic diagram showing the configuration of a conventional backplane system.

Referring to FIG. 1, a conventional backplane 10 is typically a double-sided or multilayer PCB substrate, and includes a plurality of slots 12-1 through 12-5 for mounting the modules 20, and each slot The fields 12-1 to 12-5 are connected in common through signal lines (data bus, address bus, control signal bus, etc.) and power lines formed on the backplane by a metal pattern. In FIG. 1, reference numeral 24 denotes a connector for connecting the slot 12-3 and the module 20.

In the backplane system as described above, a unique ID (hereinafter referred to as a 'slot ID') is required to distinguish modules or slots inserted into each slot.

However, since the backplane system according to the related art as described above uses a method of setting a slot ID in the module itself for each module inserted into each slot 12-1 to 12-5, the slot ID in the module 20. The slot ID setting unit 22 is additionally required for setting the module, which complicates the configuration of the module and also causes the inconvenience of setting the slot ID.

The present invention has been made to solve the problems of the prior art as described above, by providing a backplane that can set the slot ID by providing an improved backplane system so that it is not necessary to set the slot ID to each module. There is this.

1 is a schematic diagram showing the configuration of a conventional backplane system.

2 is a schematic diagram illustrating a backplane system according to the present invention.

3 is a block diagram illustrating a configuration of a module used in the backplane system according to the present invention.

4 is another embodiment of a backplane system according to the present invention;

[Explanation of symbols on the main parts of the drawings]

100: main backplane 120-1 through 120-5: main slot

200: sub backplane 220-1 to 220-5: sub slot

230-1 to 230-5: Slot ID setting unit 300: Module

310: main slot connector 320: subslot connector

330: comparator

The present invention is configured in order to achieve the above object is as follows. That is, the system according to an embodiment of the present invention provides a common bus such as a data bus, an address bus control signal bus, and a main backplane having N slots for mounting N modules; It consists of N additional slots for providing slot IDs to N modules, and a sub backplane having a slot ID setting unit for setting slot IDs of each slot, in which N modules are mounted in N slots, but slots for each module are provided. It is characterized in that the unique ID of the backplane to provide.

In addition, the system according to another embodiment of the present invention for achieving the above object includes an N slot for mounting the N modules; A slot ID setting unit for setting a unique ID of each slot; It provides a common bus such as a data bus, an address bus, and a control signal bus for connecting N slots in common, and consists of a backplane that provides a unique slot ID for each slot according to the setting value of the slot ID setting unit. The N modules are mounted on the backplane, but the unique ID of the slot for each module is provided on the backplane.

Each of the above-described modules includes a comparator that compares a slot ID input from a sub backplane with an address input from a main backplane and outputs an address valid signal when it matches.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic diagram illustrating a backplane system according to the present invention, and FIG. 3 is a block diagram illustrating a module used in the backplane system according to the present invention.

The backplane system according to the present invention has a plurality of main slots 120-1 to 120-5 and each slot 120-1 to 120-5 for mounting the module 300 as shown in FIG. The main backplane 100 provides a data bus, an address bus, a control signal bus, and the like for connecting, and a sub backplane 200 for providing a slot ID to each module 300.

For example, in the case of the VME bus type backplane, the slots 120-1 to 120-5 mean that the guide rails are mounted to mount the module to the 96-pin connector of the VMEbus backplane. In the VMEbus specification, the maximum number of slots a VMEbus backplane can have is 21, but in industrial controllers, 5 and 12 slot backplanes are often used. When viewed from the front, the VMEbus system is called slot 1, slot 2, slot 3 ... from the left.

In an embodiment of the present invention, five slots are taken as an example, and slot IDs of respective slots are defined as shown in Table 1 below.

Slot classification Slot id S3 S2 S1 S0 Decimal First slot 0 0 0 One One Second slot 0 0 One 0 2 Third slot 0 0 One One 3 Fourth slot 0 One 0 0 4 Fifth slot 0 One 0 One 5

As described above, referring to Table 1, in the first sub slot 220-1 of the sub backplane 200, Vcc is connected to S0 of the slot ID setting unit 230-1, and ground (GND) to S1 to S3. Is connected to the slot ID is defined as binary "0001", the second sub-slot 220-2 of the sub backplane GND is connected to S0 of the slot ID setting unit 230-2, Vcc is connected to S1 , The ground ID is connected to S2 and S3 and the slot ID is defined as binary " 0010 ". The third sub-slot 220-3 of the sub backplane has Vcc connected to S0 and S1 of the slot ID setting unit 230-3, and a ground (GND) connected to S2 and S3 to the binary "0011". The slot ID is defined, and the fourth sub slot 220-4 of the sub backplane has GND connected to S0, S1 and S3 of the slot ID setting unit 230-4, Vcc connected to S2, and a binary "0100". Slot ID is defined, the fifth slot 220-5 of the sub backplane Vcc is connected to S0 and S2 of the slot ID setting unit 230-5, and the ground (GND) is connected to S1 and S3 binary Slot ID is defined as "0101". The slot ID allocation is just one example, and can be arbitrarily set as necessary, such as the number of modules to be inserted.

In addition, the module 300 inserted into the backplane according to the present invention does not need a part for setting a slot ID, and each module 300 includes an address comparator 330 as shown in FIG. The address signals A0 to A3 input from the address bus of the backplane 100 are compared with the slot IDs S0 to S3 set in the sub backplane 200. The comparator 330 compares the address signals A0 to A3 with the slot IDs S0 to S3 and outputs an address valid signal when they match.

Therefore, the present invention enables another module to automatically recognize the corresponding slot by using another backplane bus, and also corresponds to its slot ID address in the bus area of the backplane by using the corresponding slot ID information. Select only the data to accept.

4 shows another embodiment according to the present invention, in which a portion for setting a slot ID is installed in the main backplane while using one main backplane.

Referring to FIG. 4, the main backplane 100 ′ is a double-sided or multi-layer PCB substrate, and includes a plurality of slots 120 ′-1 through 120 ′-5 for mounting a module, and each slot 120. '-1 to 120'-5 are commonly connected to signal lines (data bus, address bus, control signal bus, etc.) and power lines formed on the backplane 100' through a metal pattern. In addition, a dip switch 230'-1 to 230'-5 for setting a slot ID of a corresponding slot is implemented at one side of each slot 120'-1 to 120'-5, and the dip switch 230'- 1 to 230'-5) to set a unique ID for each slot. For example, in the case of using the signals S0 to S3 as in the previous embodiment, after setting the 4-bit dip switch, the dip switches 230'-1 to 230'-5 are operated to convert the signal lines into Vcc or the like. Connect to GND to set slot ID.

Although the foregoing description has been made with reference to a preferred embodiment of the present invention, those skilled in the art will variously modify the present invention without departing from the spirit and scope of the invention as set forth in the claims below. And can be changed.

As described above, according to the present invention, the slot ID of the backplane system for mounting a plurality of modules can be set in the backplane itself instead of setting in each module, thereby reducing the manufacturing cost of the module itself, and space of the module. In addition to saving money, the slot ID can be easily set.

In particular, when the slot ID is duplicated, an error occurs. In the related art, it is difficult to check because it is set in each module. However, by installing the slot ID directly on the backplane, it is possible to easily check the slot ID to reduce an error due to a setting error.

Claims (5)

A main backplane providing a common bus such as a data bus, an address bus control signal bus, and having N slots for mounting N modules; And And a sub backplane having N additional slots for providing slot IDs to the N modules and a slot ID setting unit for setting slot IDs of each slot, Mounting N modules in the N slots, the backplane system configured to provide a unique ID of the slot for each module in the backplane. The backplane system of claim 1, wherein the slot ID setting unit is a dip switch. The apparatus of claim 1 or 2, wherein each of the modules includes a comparator for comparing the slot ID inputted from the sub backplane and the address inputted from the main backplane and outputting an address valid signal when they match. Backplane System. N slots for mounting N modules; A slot ID setting unit for setting a unique ID of each slot; And It provides a common bus such as a data bus, an address bus, a control signal bus for connecting the N slots in common, and comprises a backplane that provides a unique slot ID for each slot according to a setting value of the slot ID setting unit. Mounting N modules in the N slots, the backplane system configured to provide a unique ID of the slot for each module in the backplane. 5. The backplane system of claim 4, wherein each of the modules includes a comparator for outputting an address valid signal when a slot ID inputted from the sub backplane and an address inputted from the main backplane are matched with each other.