RU2429524C2 - Industrial controller - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: controller has a power module, a computing module, modules for output/input of discrete signals and/or modules for input/output of analogue signals and a tray for the ISA bus. In the tray, the ground bus is connected to contacts of a first connector, a second connector, a third connector, a fourth connector, a fifth connector, a sixth connector, a seventy connector, an eighth connector, a ninth connector, a tenth connector, an eleventh connector and a twelfth connector. In the input/output modules, the first input of the address comparator circuit is connected to the first contact of the connector, the second input of the address comparator circuit is connected to the second contact of the connector, the third input of the address comparator circuit is connected to the third contact of the connector, the fourth input of the address comparator circuit is connected to the fourth contact of the connector, the fifth input of the address comparator circuit is connected to the fifth contact of the connector, where each connector of the tray provides every connected input/output module with a unique address.

EFFECT: high reliability of the controller.

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Description

The invention relates to measuring equipment and is intended to automate the collection and processing of information, as well as the formation of control actions for industrial equipment and can be used in information management systems for automation of technological objects of industrial enterprises.

Known IBM PC compatible modular industrial controllers of the MIC-2000 family [1]. The MIC-2000 family controller contains a power supply module, a computing device module, discrete signal input / output modules, analog signal input / output modules connected to the backplane for the ISA bus. The addresses of the input / output modules to which they respond during a program call are set in the address setting device, which is part of each module and is a binary code comparison scheme. If the code arriving on the ISA bus to certain inputs of the address setting device matches the one specified in the comparison circuit, the module becomes active. The code in the module is set by switching certain inputs (contacts) of the comparison circuit to the common wire of the power source using jumpers-jumpers [2]. In the absence of jumpers, the inputs of the comparison circuit are energized (power is supplied through the resistor). The disadvantage of the MIC-2000 family of controllers is the complexity of operation associated with the need to set the module address using jumpers when installing it in the controller.

Closest to the claimed device is an industrial controller CPN [3]. The KPN controller contains a power module, a computing module, a backplane for the ISA bus, input / output modules for discrete and analog signals. The addresses to which the input / output modules respond when programmed are set by jumpers-jumpers on each module. Comparison of the addresses set on the address bus with the module address is carried out using a chain of logical blocks that perform Boolean functions “exclusive or” and “or”. For “exclusive or” logic blocks, the second inputs are connected to the corresponding bus lines of the address bus through the connector, and the first inputs through resistors are connected to the power bus and, using jumpers-jumpers in a certain way (for a given address), are switched to the ground bus of the power source. Logical blocks “or” form the subsequent links in the chain - the outputs from the blocks “exclusive or” are connected to their inputs, and at the output of this chain, when the address specified and set on the bus coincides, a signal to enable access to the module is generated. The technical solution used allows you to save the address of the module in case of its rearrangement in the controller. Regardless of the position in the controller, the module is accessed at the same address, which will not change without physical intervention. For convenience, addresses are set in binary codes corresponding to the positional position of the module in the controller frame

The disadvantage of [3] is the complexity and the complexity of verifying the module’s operability in the entire range of possible addresses, the complexity of operation associated with the need to set the address using jumpers, and the decrease in reliability due to the presence of contacts under the jumpers in the plug-in module.

The technical result of the invention is to simplify operation, increase the reliability of the controller.

The technical result is achieved by the fact that in the controller containing the power module, the computing module, input / output modules of discrete signals and / or input / output modules of analog signals connected to the unit backplane for the ISA bus, in the unit backplane the ground bus is connected to the second, third , the fourth, fifth contacts of the first connector, with the first, third, fourth, fifth contacts of the second connector, with the third, fourth, fifth contacts of the third connector, with the first, second, fourth, fifth contacts even grated connector, with the second, fourth, fifth contacts of the fifth connector, with the first, fourth, fifth contacts of the sixth connector, with the fourth, fifth contacts of the seventh connector, with the first, second, third, fifth contacts of the eighth connector, with the second, third, fifth contacts the ninth connector, with the first, third, fifth contacts of the tenth connector, with the third, fifth contacts of the eleventh connector, with the first, second, fifth contacts of the twelfth connector, in the input / output modules the first input of the address comparison circuit ca is connected to the first contact of the connector, the second input of the address comparison circuit is connected to the second contact of the connector, the third input of the address comparison circuit is connected to the third contact of the connector, the fourth input of the address comparison circuit is connected to the fourth contact of the connector, the fifth input of the address comparison circuit is connected to the fifth contact pin and each connector of the backplane block provides a unique address to any connected I / O module.

Figure 1 presents the structural diagram of the controller CPN.

Figure 2 presents a diagram of the comparison of the address and the formation of the permission signal access to the input / output module used in the prototype, with setting the module address using the "jumpers".

Figure 3 presents the proposed scheme for comparing the address and the formation of the permission signal access to the I / O module, without the need to set the module address.

Figure 1 contains a power module 1, a computing module 2, input / output modules of discrete signals 3 and analog signals 4 (the presence and quantity of which depends on the configuration of the controller). All modules are connected to the backplane 5 for the ISA bus. Signal exchange, supply of modules with power is carried out through the unit unit. For all I / O modules (both analog and digital), the address comparison scheme responsible for comparing the incoming address with the given module address is the same.

Figure 2 contains connector 6 (the figure does not depict all the connector pins, but only those considered), connecting the backplane and the I / O module board; logic blocks that perform Boolean functions "exclusive or" 7, the second inputs connected to the lines of the address bus ADR0 ... ADR4 through connector 6, and the first inputs connected to the power bus VCC through resistors R1 ... R5 and through jumpers J1 ... J5 with the ground bus power supply GND logical blocks that perform the Boolean function "or" 8, the inputs of which are connected to the outputs of blocks 7 or previous blocks 8, and the output is connected to the functional part of module 9.

Figure 3 contains identical first, second (and so on until the twelfth inclusive) connectors 6 (the figure does not depict all the contacts of the connectors, but only considered), connecting the backplane unit and the input-output modules; logic blocks that perform Boolean functions "exclusive or" 7, the second inputs connected to the lines of the address bus ADR0 ... ADR4 through connector 6, the first inputs connected to the power bus VCC via resistors R1 ... R5 and (depending on the address set by the connector) connected via contacts connector MA0 ... MA4 with the ground bus of the power supply GND; logical blocks that perform the Boolean function "or" 8, the inputs of which are connected to the outputs of blocks 7 or previous blocks 8, and the output is connected to the functional part of module 9.

The present invention works as follows. When the computing module addresses the input / output modules on the address bus, the computing module issues the address of the called module. The address signals through the connector are received in each connected module to the inputs of the logic blocks of the address comparison circuit. Actual comparison of the received address with the address specified by the connections in the connector on the backplane occurs. In the connector of the backplane block, the address of the module connected to it is specified by the presence or absence of a connection between the contacts of the MA0 ... MA4 connector and the ground bus, and the “unit” for each bit of the address is specified by the absence of such a connection for this contact, and “zero” by the presence of such a connection . Upon receipt of the address corresponding to the one specified in the connector through the address bus to the module connected to this connector, the logical blocks of this module generate at the output of the chain of logical blocks (from the blocks numbered in figures 2 and 3) an access signal that is fed to the functional part of the module and allows information exchange with the input / output module.

Since the addresses of the modules correspond to their positional position in the backplane and are set by binary codes, already at the stage of development and manufacture of the multilayer printed circuit board of the backplane for the ISA bus, the order of the required connections between the ground bus of the power supply (GND) and certain contacts of the connectors installed on him, and connections are made.

Thus, when installing the module in the controller, its address will take on the value corresponding to the number of the connector in which it will be installed. As a result of using the proposed connections in the backplane when installing the module in the frame (when connecting the modules to the backplane), the need for jumpers and jumpers for them is eliminated and no operations are required to set the address. The connection of the contacts of the connectors of the backplane block to the ground bus of the GND power supply (in the manufacture of the backplane) is determined by the serial number of the connector, presented in binary code. For example, the table shows the connection order of contacts for connectors with positional addresses from 1 to 12. It should be noted that the specified connection order is valid for a controller with 32 seats. In general, the number of contacts to an address is determined by the maximum number of seats in the controller.

Contact Connection Procedure Sequence (binary) number of the footprint in the controller frame The presence of communication between the contacts MA0-MA4 of the connector of the unit of the unifying and ground bus power supply (GND) / (input number of the circuit comparing the address) MA4 (5) MA3 (4) MA2 (3) MA1 (2) MA0 (1) 1 (00001) GND GND GND GND X 2 (00010) GND GND GND X GND 3 (00011) GND GND GND X X 4 (00100) GND GND X GND GND 5 (00101) GND GND X GND X 6 (00110) GND GND X X GND 7 (00111) GND GND X X X 8 (01000) GND X GND GND GND 9 (01001) GND X GND GND X 10 (01010) GND X GND X GND 11 (01011) GND X GND X X 12 (01100) GND X X GND GND Note: X - no connection, GND - no connection

Information sources

1. IBM PC Compatible Modular Industrial Controllers MIC-2000, pp. 14-2, 14-3, 14-4. Product catalog for industrial automation based on industrial computers. ProSoft, Volume 91, 2001

2. User manual for the MIC-2718 High-Performance DAS Module, article 2003271810, 2nd edition, 1998 (available at www.advantech.com).

3. KPN controller, Operation manual. Part 1, IGND.468157.005 RE (prototype).

Claims (1)

An industrial controller comprising a power module, a computing module, digital input / output modules and / or analog signal input / output modules connected to a backplane for the ISA bus, characterized in that in the backplane, the ground bus is connected to the second, third, fourth , the fifth contacts of the first connector, with the first, third, fourth, fifth contacts of the second connector, with the third, fourth, fifth contacts of the third connector, with the first, second, fourth, fifth contacts of the fourth soy an extender, with second, fourth, fifth contacts of the fifth connector, with first, fourth, fifth contacts of the sixth connector, with fourth, fifth contacts of the seventh connector, with first, second, third, fifth contacts of the eighth connector, with second, third, fifth contacts of the ninth connector, with the first, third, fifth contacts of the tenth connector, with the third, fifth contacts of the eleventh connector, with the first, second, fifth contacts of the twelfth connector, in the input / output modules the first input of the connection address comparison circuit n to the first contact of the connector, the second input of the address comparison circuit is connected to the second contact of the connector, the third input of the address comparison circuit is connected to the third contact of the connector, the fourth input of the address comparison circuit is connected to the fourth contact of the connector, the fifth input of the address comparison circuit is connected to the fifth contact pin, moreover, each connector of the backplane unit provides a unique address to any connected I / O module.

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