CN204883335U - PAS100 control system's redundant framework of bus - Google Patents
PAS100 control system's redundant framework of bus Download PDFInfo
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- CN204883335U CN204883335U CN201520543013.3U CN201520543013U CN204883335U CN 204883335 U CN204883335 U CN 204883335U CN 201520543013 U CN201520543013 U CN 201520543013U CN 204883335 U CN204883335 U CN 204883335U
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Abstract
The utility model discloses a PAS100 control system's redundant framework of bus, control system's control layer is equipped with at least one controller, and the communications network interface of controller carries out the network communication through communications network and monitoring layer, and two communication bus interfaces of controller are used for linking to each other with the input/output layer, the input/output layer is equipped with a plurality of input/output modules group, each input and output modules inter block is equipped with a plurality of IO modules and communication module, and communication module is equipped with four communication interface, and wherein two communication interface are used for realizing the communication redundancy to the controller, and two other communication interface are used for the realization redundant to the communication of input and output modules inter block IO module, and the communication module of input and output modules group carries out the data interaction through two controllers that each other are redundant main communication bus and reserve communication bus and control layer, forms the bus redundancy. The utility model discloses take all factors into consideration PAS100 control system's ageing, security, reliability, and it is with low costs.
Description
Technical field
The utility model relates to the redundancy framework of dcs, is specifically related to a kind of bus redundancy framework of PAS100 control system.
Background technology
PAS100 control system is the automatic process control system system based on DCS frame design, adopt modular design method and open design concept, make this system possess good opening and extendability, be applicable to the automatic process control system of the industries such as oil, chemical industry, metallurgy, light industry, the energy and environmental protection.Existing DCS system (i.e. collective and distributive type control system or dcs) adopts multi-level hierarchical structure, combine the advantage of conventional instrument control system and centralized computer control, compensate for their respective deficiencies, possess the features such as decentralised control, centralized operation, differentiated control, flexible configuration and configuration convenience, its reliability is the key index of DCS system.In order to improve the reliability of DCS system, therefore need to carry out redundancy setting to DCS system.The redundant position of the DCS system of different manufacturers, degree and specific implementation are all different, and common system redundancy implementation is parts redundant.Consider different with for concrete industry application demand based on cost factor, the parts redundant of different manufacturers realize rank and mode is also different, the whole parts redundant of some employings, also have employing section components redundancy.In theory, the position degree that is more, redundancy that the Redundancy Design of system realizes redundancy is higher, and the safety and reliability of system is better.But from the Design and implementation angle of system, also can add the cost of the complexity of system, the difficulty of design and product, and much higher complexity must cause more unpredictalbe problem, adds some potential risks.Economically consider, too high redundance can increase the cost of system greatly, or even a kind of waste.As: the key-course of control system communicates with Modbus/TCP agreement with adopting Ethernet between input and output interlayer at present, and technical difficulty is relatively large, and cost is high.Therefore be badly in need of a kind of redundancy structure reasonable in design of exploitation at present, this redundancy structure safety and reliability, and cost is low.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of bus redundancy framework of PAS100 control system, this redundancy framework is reasonable, considers ageing, the security of PAS100 control system, reliability, and cost is low, ensure that PAS100 control system can normally be run.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of bus redundancy framework of PAS100 control system, comprise the supervisory layers of PAS100 control system, key-course and input and output layer, it is characterized in that: described key-course is provided with at least one controller, described controller is provided with two communication bus interface and communications network interface, the communications network interface of described controller carries out network service by communication network and supervisory layers, and two communication bus interface of controller are used for being connected with input and output layer; Described input and output layer is provided with multiple input/output module group, multiple I/O module and communication module is provided with in described each input/output module group, described communication module is provided with four communication interfaces, wherein two communication interfaces are for realizing the communication redundancy to controller, two other communication interface is for realizing the communication redundancy to I/O module in input/output module group, by two, the main communication bus of redundancy and the controller of spare communication bus and key-course carry out data interaction, formation bus redundancy to the communication module of input/output module group each other.
Described input and output layer is provided with maximum eight input/output module groups, is equipped with maximum eight I/O module and communication module in described each input/output module group.
It is mutual that the communication module of described input/output module group carries out real time data by the I/O module in two each other main communication bus of redundancy and spare communication bus and input/output module group.
Communication module in described each input/output module group carries out data interaction by each I/O module in two each other the RS485 bus of redundancy and Modbus agreement and input/output module group.
The controller of described key-course is made up of power module, CPU module and public base, described power module and CPU module are fixed on public base by connector, realize interconnected by the base plate of public base, described CPU module is provided with communications network interface and communication bus interface, and the communications network interface of CPU module is used for communicating with supervisory layers; The communication bus interface of CPU module is used for carrying out data interaction with the communication module of each input/output module group of input and output layer.
The CPU module of described controller is provided with two communication bus interface, described two communication bus interface are RS485 bus interface, and by two, the RS485 bus of redundancy and the communication module of Modbus communication protocol and input and output layer carry out data interaction to the controller of described key-course each other.
The CPU module of described controller is provided with two communications network interfaces, and the main communication network of redundancy and spare communication network and supervisory layers carry out network service each other respectively by two for the controller of described key-course.
Described communications network interface is RJ45 Ethernet interface, and the master ethernet of redundancy and Ethernet for subsequent use and supervisory layers carry out network service each other respectively by two for the controller of described key-course.
The beneficial effects of the utility model: be provided with multiple I/O module and communication module in each input/output module group of input and output layer of the present utility model, communication module is provided with four communication interfaces, communication module reads the load module data of I/O module in real time, and data packing is sent to controller, communication module unpacks and controls to export order and the output module being sent to each I/O module respectively, communication module share controller with the communication task of input and output layer, improve the work efficiency of controller.Respectively by two, the main communication bus of redundancy and the controller of spare communication bus and key-course carry out data interaction to the communication module of each input/output module group each other, achieve bus redundancy, communication module and controller adopt bus communication, communicate with Modbus/TCP agreement relative to Ethernet, technical difficulty is relatively low, and operating cost is low.Adopt two buses, ensure the proper communication of input and output layer and key-course.The utility model is considered based on the overall situation, and adopts 1:1 redundancy principle, effectively and simple, flexible configuration, is easy to realize, has taken into full account various level data traffic and traffic rate, adopt Ethernet and RS485 bussing technique to realize various level communication redundancy; Take into full account the feature of industry control industry and collective and distributive type control system, meet the application demand of the sector and this area; Reduce the complicacy of overall system design, there is good consistance and practicality, easy to use, good reliability, versatility are high, meet higher ageing, reliability and security; And cost is low.
Described input and output layer is provided with maximum eight input/output module groups, is equipped with maximum eight I/O module and communication module in described each input/output module group.Be practically applicable to middle-size and small-size control system, meet general and common redundancy requirement, to meet on market user to the redundancy requirement of control system, and cost is low.
Communication module in described each input/output module group carries out data interaction by each I/O module in two each other the RS485 bus of redundancy and Modbus agreement and input/output module group.Communication module is realized and the communication of each I/O module in input/output module group by the RS485 bus of two redundancies each other, ensure that the normal operation of each input/output module group.
Described key-course controller is made up of power module, CPU module and public base, and power module and CPU module are fixed on public base by connector, realize interconnected by the base plate of public base, and hardware is simpler, and cost is also relatively low.CPU module is provided with communications network interface and communication bus interface, and CPU module communications network interface is used for communicating with supervisory layers; The communication bus interface of CPU module is used for carrying out data interaction with the communication module of each input/output module group of input and output layer.CPU module adopts communication bus to communicate with the communication module of Modbus agreement with input/output module group by self integrated communication interface, and technical difficulty is relatively low, and cost is low, has high reliability and stability.
By two, the RS485 bus of redundancy and the communication module of Modbus communication protocol and input and output layer carry out data interaction to the controller of described key-course each other, adopt redundancy RS-485 bus stability high, easy realization, cost is relatively low, and redundant configuration is more flexible.
The controller of key-course adopt two each other the main communication network of redundancy and spare communication network and supervisory layers carry out network service, achieve network redundancy, ensure that the unimpeded of network.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model system;
Fig. 2 is the structural representation of the utility model controller;
Fig. 3 is the schematic diagram of the communication interface of the utility model controller;
Fig. 4 is the schematic diagram of the communication interface of the utility model communication module;
Fig. 5 is the connection diagram of I/O module and communication module;
Fig. 6 is bus redundancy connection diagram;
Fig. 7 is the redundant network connection diagram between supervisory layers and key-course;
Fig. 8 is that the network between supervisory layers with key-course is connected nonredundancy schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
See shown in Fig. 1 to Fig. 8, a kind of bus redundancy framework of PAS100 control system, PAS100 control system, according to DCS architecture design, is mainly divided into 3 levels, comprises supervisory layers, key-course and input and output layer.
Described key-course arranges at least one controller, and the major function of controller is the collection realizing load module data in input and output layer, performs steering logic according to configuration program, and the output of output module data in control inputs output layer.Controller is running control software, performs steering logic, and is realized by certain communication mechanism and strategy and data message mutual of each module of input and output layer and each node of supervisory layers.Controller is the core component that control system control decision performs.Key-course can arrange one or more controller, is provided with a controller in the present embodiment.
Shown in 2, controller is made up of power module 1, CPU module 2 and public base 3, and power module 1 and CPU module 2 are fixed on public base 3 by connector, and the base plate of logical public base 3 realizes interconnected.Power module 1 is powered for controller, and CPU module, based on the design of technical grade X86 core board, is the core of controller.Described CPU module 2 is provided with two communications network interfaces and two communication bus interface, and two communications network interfaces of CPU module are used for communicating with supervisory layers; Two communication bus interface of CPU module are used for carrying out data interaction with the communication module of each input/output module group of input and output layer.Shown in Figure 3, in the present embodiment: CPU module is provided with two RJ45 Ethernet interfaces and two RS485 bus interface, two RJ45 Ethernet interfaces are RJ45-1 respectively, RJ45-2, two RS485 bus interface are RS485-1, RS485-2 respectively, and two RJ45 Ethernet interfaces are used for communicating with supervisory layers, two RS485 bus interface, for realizing communication and the data interaction of each input/output module group with input and output layer, are most preferred embodiment.This structural device is simple, and cost is low, is convenient to realize.
In all working task of controller, communicating with the I/O module of input and output layer and realizing data interaction is a task the most consuming time.In order to improve controller work efficiency, PAS100 control system introduce communication module with share controller with the communication task of input and output layer.
Described input and output layer is for controlling the output of on-site signal measurement and PAS100 control system control signal, and input and output layer is made up of maximum 8 input/output module groups, and each input/output module group comprises maximum 8 I/O module and communication module.Communication module and I/O module are arranged in same frame and form an input/output module group, and communication module unifies the data of I/O module in processed group, and realizes data interaction with controller.The function of each I/O module be on-site signal measure and output system control signal to field apparatus.Communication module be controller realize with data communication in each input/output module group " the collecting and distributing " center " of information, in the input process of I/O module, each load module data in communication module reading group in real time, and break into a packet and send to controller; In the output procedure of I/O module, communication module resolves the output steering order of self-controller, then controls the output of each output module respectively.
In the present embodiment: input and output layer is provided with eight input/output module groups, be first, second, third, fourth respectively ... 8th input/output module group.Each input/output module group includes eight I/O module IOX1, IOX2, IOX3, IOX4, IOX5, IOX6, IOX7, IOX8 and communication module CPX.First input/output module group is respectively IO11, IO12, IO13, IO14, IO15, IO16, IO17, IO18 by eight I/O module, and communication module CP1, and eight I/O module and two communication modules are positioned at same IO frame.Second input/output module group is respectively IO21, IO22, IO23, IO24, IO25, IO26, IO27, IO28 by eight I/O module, and CP2, and eight I/O module and two communication modules are positioned at same IO frame.The vibrational power flow of all the other several input/output module groups is all identical, omits at this.
Shown in Figure 4: the communication module of each input/output module group is provided with two RS485 communication interfaces for connection control device with two for being connected the RS485 communication interface of I/O module, two RS485 communication interfaces for connection control device are RS485-U1 and RS485-U2 respectively, two is RS485-D1 and RS485-D2 for connecting the RS485 communication interface of I/O module respectively, the communication redundancy of two realizations of the RS485 communication interface for connection control device to controller, two realize the communication redundancy to I/O module in input/output module group for the RS485 communication interface connecting I/O module.
Shown in Figure 5, communication module in each input/output module group is connected with each I/O module with spare communication bus successively by the main communication bus of two RS485 communication interfaces, two redundancies each other, described main communication bus and spare communication bus all adopt RS485 bus, communication protocol adopts Modbus communication protocol, and in the communication module of input/output module group and input/output module group, each I/O module is based on the Modbus protocol realization data interaction of RS485 bus.
Two RS485 buses by being built in IO framework soleplate between communication module with eight I/O module realize being connected, and communication module passes through I/O module data in RS485 bus read-write group, if two RS485 buses are respectively RS485-1 and RS485-2.Under normal circumstances, RS485-1 is main communication bus, RS485-2 is spare communication bus, communication module is communicated with each I/O module by main communication bus RS485-1, read-write I/O module data, if communication module by main communication bus RS485-1 and a certain I/O module communication failure, is then enabled spare communication bus RS485-2 and is communicated with this I/O module; If communication module is by I/O module communication failure number each in main communication bus RS485-1 and input/output module group more than n (this value can be arranged, and is defaulted as 4), then spare communication bus RS485-2 switches to main communication bus.Because RS485-1 and RS485-2 is separate, if a RS485-1 and RS485-2 wherein arbitrary communication bus breaks down or exception, or a certain nodes break down of main communication bus or exception, spare communication bus is unaffected, and system can normally be run and work.
Shown in Figure 6, the communication module of each input/output module group respectively by two RS485 communication interfaces, two the main communication bus of redundancy and the controller of spare communication bus and key-course carry out data interaction each other, main communication bus and spare communication bus all adopt RS485 bus, communication protocol adopts Modbus communication protocol, based on the Modbus protocol realization data interaction of RS485 bus between two communication modules of input and output layer and the controller of key-course.Relative to ethernet communication, this bus communication hardware is simpler, and implement technical difficulty lower, cost also relative to lower, and has high reliability and stability.
All be connected by two RS485 buses between the controller of key-course and the communication module of input and output layer, if two RS485 bus is respectively RS485-A and RS485-B, under normal circumstances, RS485-A is main communication bus, RS485-B is spare communication bus, and each controller is communicated with each communication module by main communication bus RS485-A.If controller by main communication bus RS485-A and a certain communication module communication failure, is then enabled spare communication bus RS485-B and is communicated with this communication module; If controller by main communication bus RS485-A and communication module failure number more than n (this value can be arranged, and is defaulted as 4), then spare communication bus RS485-B switches to main communication bus.Because RS485-A and RS485-B is separate, if wherein an arbitrary communication bus breaks down or abnormal, or a certain nodes break down of main communication bus or exception, spare communication bus is unaffected, and system can normally be run and work.
Communication bus redundancy in communication bus redundancy between key-course and input and output layer and each input/output module group between communication module and I/O module, form the bus redundancy of PAS100 control system, bus redundancy ensure that the proper communication between key-course and input and output layer and in each input/output module group between communication module and I/O module.
Described supervisory layers is the tool software such as PAS-HMI monitoring software, configuration software and the PAS-CONFIG run on PC platform, for system monitoring, Project Configuration and debugging.Supervisory layers is provided with server, multiple active station (1 ... n active station) and engineer station.
Shown in Figure 7, in this PAS100 control system, the network between supervisory layers with key-course is connected and is configured to redundancy.The controller of key-course all provides two RJ45 Ethernet interfaces to supervisory layers, two main communication network of redundancy and spare communication networks each other can be accessed respectively by these two RJ45 ethernet controllers, main communication network and spare communication network all adopt 100M/1000M Ethernet, general Modbus/TCP or special SicModbus-UDP communication protocol, maximum network nodes is 247, achieves the communication network redundancy between supervisory layers and key-course.In the system of network redundancy, wherein a network default is as main communication network, and another network is spare communication network, if main communication network breaks down, then enables spare communication network; If a certain node and main communication network interface break down, then this node is enabled and spare communication network interface.
Shown in Figure 8, described supervisory layers is connected with the network between key-course also can be configured to nonredundant network.
Claims (8)
1. the bus redundancy framework of a PAS100 control system, comprise the supervisory layers of PAS100 control system, key-course and input and output layer, it is characterized in that: described key-course is provided with at least one controller, described controller is provided with two communication bus interface and communications network interface, the communications network interface of described controller carries out network service by communication network and supervisory layers, and two communication bus interface of controller are used for being connected with input and output layer; Described input and output layer is provided with multiple input/output module group, multiple I/O module and communication module is provided with in described each input/output module group, described communication module is provided with four communication interfaces, wherein two communication interfaces are for realizing the communication redundancy to controller, two other communication interface is for realizing the communication redundancy to I/O module in input/output module group, by two, the main communication bus of redundancy and the controller of spare communication bus and key-course carry out data interaction, formation bus redundancy to the communication module of input/output module group each other.
2. the bus redundancy framework of PAS100 control system according to claim 1, is characterized in that: described input and output layer is provided with maximum eight input/output module groups, is equipped with maximum eight I/O module and communication module in described each input/output module group.
3. the bus redundancy framework of PAS100 control system according to claim 1 and 2, is characterized in that: it is mutual that the communication module of described input/output module group carries out real time data by the I/O module in two each other main communication bus of redundancy and spare communication bus and input/output module group.
4. the bus redundancy framework of PAS100 control system according to claim 1 and 2, is characterized in that: the communication module in described each input/output module group carries out data interaction by each I/O module in two each other the RS485 bus of redundancy and Modbus agreement and input/output module group.
5. the bus redundancy framework of PAS100 control system according to claim 1, it is characterized in that: the controller of described key-course is made up of power module, CPU module and public base, described power module and CPU module are fixed on public base by connector, realize interconnected by the base plate of public base, described CPU module is provided with communications network interface and communication bus interface, and the communications network interface of CPU module is used for communicating with supervisory layers; The communication bus interface of CPU module is used for carrying out data interaction with the communication module of each input/output module group of input and output layer.
6. the bus redundancy framework of PAS100 control system according to claim 1 or 5, it is characterized in that: the CPU module of described controller is provided with two communication bus interface, described two communication bus interface are RS485 bus interface, and by two, the RS485 bus of redundancy and the communication module of Modbus communication protocol and input and output layer carry out data interaction to the controller of described key-course each other.
7. the bus redundancy framework of PAS100 control system according to claim 1 or 5, it is characterized in that: the CPU module of described controller is provided with two communications network interfaces, the main communication network of redundancy and spare communication network and supervisory layers carry out network service each other respectively by two for the controller of described key-course.
8. the bus redundancy framework of PAS100 control system according to claim 7, it is characterized in that: described communications network interface is RJ45 Ethernet interface, the master ethernet of redundancy and Ethernet for subsequent use and supervisory layers carry out network service each other respectively by two for the controller of described key-course.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871673A (en) * | 2016-05-23 | 2016-08-17 | 株洲时代电子技术有限公司 | Network control system of large road maintenance machine |
| CN107608204A (en) * | 2017-09-29 | 2018-01-19 | 上海微程电气设备有限公司 | Redundancy communication controller based on arm processor |
| CN112350909A (en) * | 2019-08-06 | 2021-02-09 | 中车株洲电力机车研究所有限公司 | Communication system and method based on RS485 bus |
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2015
- 2015-07-24 CN CN201520543013.3U patent/CN204883335U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871673A (en) * | 2016-05-23 | 2016-08-17 | 株洲时代电子技术有限公司 | Network control system of large road maintenance machine |
| CN105871673B (en) * | 2016-05-23 | 2022-01-21 | 株洲时代电子技术有限公司 | Network control system for large road maintenance machinery |
| CN107608204A (en) * | 2017-09-29 | 2018-01-19 | 上海微程电气设备有限公司 | Redundancy communication controller based on arm processor |
| CN112350909A (en) * | 2019-08-06 | 2021-02-09 | 中车株洲电力机车研究所有限公司 | Communication system and method based on RS485 bus |
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