CN204883339U - PAS100 control system's communication module and redundant framework of bus - Google Patents
PAS100 control system's communication module and redundant framework of bus Download PDFInfo
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- CN204883339U CN204883339U CN201520543102.8U CN201520543102U CN204883339U CN 204883339 U CN204883339 U CN 204883339U CN 201520543102 U CN201520543102 U CN 201520543102U CN 204883339 U CN204883339 U CN 204883339U
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Abstract
The utility model discloses a PAS100 control system's communication module and redundant framework of bus, the control layer is equipped with at least one controller, and the controller carries out the network communication through communications network and monitoring 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 two mutual redundant main communication module and reserve communication module of being, the main communication module and the reserve communication module of each input and output modules group all are equipped with four communication interface, wherein two communication interface are used for realizing that the communication to the controller is redundant, two other communication interface are used for realizing that the communication to input and output modules inter block IO module is redundant, the main communication module and the reserve communication module of each input and output modules group carry out the data interaction through two controllers that each other are redundant main communication bus and reserve communication bus and control layer respectively. 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 communication module and 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 existing control system communicates with Modbus/TCP agreement with adopting Ethernet between input and output interlayer, and technical difficulty is relatively large, and cost is high, and the inevitable communication module redundancy of controller redundancy, network redundancy.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, a kind of communication module and bus redundancy framework of PAS100 control system are provided, this redundancy framework is reasonable, consider 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 communication module of PAS100 control system and bus redundancy framework, 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 two the main communication module of redundancy and spare communication module is each other provided with in described each input/output module group, the main communication module of each input/output module group and spare communication module are equipped 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, the main communication bus of redundancy and the controller of spare communication bus and key-course carry out data interaction each other respectively by two for the main communication module of each input/output module group and spare communication module.
The controller of described key-course is formed by 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 interfaces, described two communication interfaces are RS485 bus interface, and the RS485 bus of redundancy and the main communication module of Modbus communication protocol and input and output layer and spare communication module carry out data interaction each other respectively by two for the controller of described key-course.
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.
Described input and output layer is provided with maximum eight input/output module groups, is equipped with maximum eight I/O module and two the main communication module of redundancy and spare communication module each other in described each input/output module group.
It is mutual that the main communication module of described each input/output module group and spare communication module all carry out real time data by I/O module in two each other main communication bus of redundancy and spare communication bus and input/output module group.
Main communication module in described each input/output module group and spare communication module carry out data interaction respectively by each I/O module in two each other the RS485 bus of redundancy and Modbus agreement and input/output module group.
Described main communication module, spare communication module and I/O module all possess Hot Plug Capability.
The beneficial effects of the utility model: be provided with multiple I/O module and two the main communication module of redundancy and spare communication module each other in each input/output module group of the input and output layer of the utility model key-course, each 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, the main communication module of each input/output module group and spare communication module are equipped with four communication interfaces, achieve communication module redundancy, the main communication module of each input/output module group and spare communication module respectively by two each other the main communication bus of redundancy and the controller of spare communication bus and key-course carry out data interaction, achieve bus redundancy.Adopt two communication modules and two buses, ensure the proper communication of input and output layer and key-course.The utility model is considered based on the overall situation, propose the scheme of a kind of communication module and bus redundancy, and adopt 1:1 redundancy principle, effectively and simple, flexible configuration, be easy to realize, take into full account various level data traffic and traffic rate, taken 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.
The controller of described key-course 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 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.CPU module adopts communication bus to communicate with the communication module of Modbus agreement with input/output module group by self integrated communication interface, technical difficulty is relatively low, cost is low, is the widely used a kind of communication mode of industrial control field, has high reliability and stability.
The RS485 bus of redundancy and the main communication module of Modbus communication protocol and input and output layer and spare communication module carry out data interaction each other by two for the controller of described key-course, adopt redundancy RS-485 bus stability high, easy realization, cost is relatively low, and redundant configuration is more flexible.
Controller 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.
Described input and output layer is provided with maximum eight input/output module groups, is equipped with maximum eight I/O module and two the main communication module of redundancy and spare communication module each other 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.
Described main communication module, spare communication module and I/O module all possess Hot Plug Capability.Plug the operation that one of them module can not affect other module, be convenient to system management or safeguard.
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 communication interface schematic diagram of the utility model controller;
Fig. 4 is the communication interface schematic diagram of the utility model communication module;
Fig. 5 is the connection diagram of I/O module and communication module;
Fig. 6 is the connection diagram of communication module and bus redundancy;
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 communication module of PAS100 control system and bus redundancy framework, PAS100 control system, according to DCS architecture design, is mainly divided into 3 levels, comprises supervisory layers, key-course and input and output layer.
The critical piece of described key-course is controller, at least one controller of key-course, and major function 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.Described key-course can arrange one or more controller, and in the present embodiment, key-course is provided with a controller.
Shown in 2, described 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 2, 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.
In the task that controller is all, 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, 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 two the main communication module of redundancy and spare communication module each other.Main communication module and spare communication module and I/O module are arranged in same frame and form an input/output module group, the function of each I/O module be on-site signal measure and output system control signal to field apparatus.Main communication module and spare 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 two the main communication module CPXA of redundancy and spare communication module CPXB each other.First input/output module group is respectively IO11, IO12, IO13, IO14, IO15, IO16, IO17, IO18 by eight I/O module, and main communication module CP1A and spare communication module CP1B, 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 main communication module CP2A and spare communication module CP2B, 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.It is mutual that main communication module and spare communication module all carry out real time data by I/O module in two each other main communication bus of redundancy and spare communication bus and input/output module group.
The master slave mode of redundant communication module is determined by controller, namely controller and which communication module carry out data communication then that communication module be main communication module, another is spare communication module.Under normal circumstances, controller and communication module CPXA carry out data communication, and now, communication module CPXA is main communication module, and communication module CPXB is spare communication module.In such cases, main communication module realizes the data communication with each I/O module in controller data and input/output module group; The data of the main communication module of spare communication module Real-Time Monitoring and running status.If it is abnormal that the controller of key-course detects that main communication module occurs, then controller provides with main communication module communication failure information and data communication is switched to spare communication module.Now, spare communication module switches to major state, and main communication module switches to stand-by state.
Described main communication module and spare communication module separate, if wherein an arbitrary communication module breaks down, individual unaffected in addition, system still can normally be run.Again because communication module possesses Hot Plug Capability, so system management or maintenance staff are according to the miscue information of system, online replacing can be realized when influential system does not run to fault communication module.
Shown in Figure 4: main communication module and the spare communication module of each input/output module group are equipped 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, main communication module in each input/output module group and spare communication module are 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 main communication module of input/output module group and spare communication module and input/output module group, each I/O module is based on the Modbus protocol realization data interaction of RS485 bus.
The controller of key-course is all connected by two RS485 buses with between the main communication module of input and output layer and spare communication module.If two RS485 bus is respectively RS485-A and RS485-B, under normal circumstances, RS485-A is main communication bus, and 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 main communication bus RS485-A and spare communication bus RS485-B is separate, if wherein an 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.
Main communication module and two RS485 buses by being built in IO framework soleplate between spare communication module with eight I/O module realize being connected.Main communication module is by I/O module data in RS485 bus read-write group, and spare communication module obtains corresponding data by monitoring this bus.If two RS485 bus is respectively RS485-1 and RS485-2.Under normal circumstances, RS485-1 is main communication bus, and RS485-2 is spare communication bus, and main communication module and spare communication module are all communicated with each I/O module by main communication bus RS485-1.Main communication module reads and writes I/O module data by main communication bus RS485-1, then spare communication module is monitored this main communication bus RS485-1 and obtained corresponding data; Main communication module reads and writes I/O data by spare communication bus RS485-2, then spare communication module is monitored spare communication bus RS485-2 and obtained corresponding data.Namely the communication bus of main communication module have switched, and the communication bus of spare communication module also carries out corresponding switching.If main communication module and spare communication module by main communication bus RS485-1 and a certain I/O module communication failure, are then enabled spare communication bus RS485-2 and are communicated with this I/O module; If main communication module and spare communication module are 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 main communication module of each input/output module group and spare communication module 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.
The controller of key-course is all connected by two RS485 buses with between the main communication module of input and output layer and spare communication module, 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 two communication modules 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 two communication modules 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 (9)
1. the communication module of a PAS100 control system and bus redundancy framework, 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 described 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 two the main communication module of redundancy and spare communication module is each other provided with in described each input/output module group, the main communication module of each input/output module group and spare communication module are equipped 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, the main communication bus of redundancy and the controller of spare communication bus and key-course carry out data interaction each other respectively by two for the main communication module of each input/output module group and spare communication module.
2. the communication module of PAS100 control system according to claim 1 and bus redundancy framework, it is characterized in that: the controller of described key-course is formed by 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.
3. the communication module of PAS100 control system according to claim 1 and 2 and bus redundancy framework, it is characterized in that: the CPU module of described controller is provided with two communication interfaces, described two communication interfaces are RS485 bus interface, and the RS485 bus of redundancy and the main communication module of Modbus communication protocol and input and output layer and spare communication module carry out data interaction each other respectively by two for the controller of described key-course.
4. the communication module of PAS100 control system according to claim 1 and 2 and bus redundancy framework, 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.
5. the communication module of PAS100 control system according to claim 4 and bus redundancy framework, 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.
6. the communication module of PAS100 control system according to claim 1 and bus redundancy framework, it is characterized in that: described input and output layer is provided with maximum eight input/output module groups, in described each input/output module group, be equipped with maximum eight I/O module and two the main communication module of redundancy and spare communication module each other.
7. the communication module of the PAS100 control system according to claim 1 or 6 and bus redundancy framework, is characterized in that: it is mutual that the main communication module of described each input/output module group and spare communication module all carry out real time data by I/O module in two each other main communication bus of redundancy and spare communication bus and input/output module group.
8. the communication module of the PAS100 control system according to claim 1 or 6 and bus redundancy framework, is characterized in that: the main communication module in described each input/output module group and spare communication module carry out data interaction respectively by each I/O module in two each other the RS485 bus of redundancy and Modbus agreement and input/output module group.
9. the communication module of the PAS100 control system according to claim 1 or 6 and bus redundancy framework, is characterized in that: described main communication module, spare communication module and I/O module all possess Hot Plug Capability.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107992027A (en) * | 2017-12-13 | 2018-05-04 | 中核控制系统工程有限公司 | A kind of DCS redundant communication modules switching method |
| CN111917526A (en) * | 2020-07-31 | 2020-11-10 | 许继集团有限公司 | Extensible cross-redundancy communication interface device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107992027A (en) * | 2017-12-13 | 2018-05-04 | 中核控制系统工程有限公司 | A kind of DCS redundant communication modules switching method |
| CN107992027B (en) * | 2017-12-13 | 2020-05-22 | 中核控制系统工程有限公司 | DCS redundant communication module switching method |
| CN111917526A (en) * | 2020-07-31 | 2020-11-10 | 许继集团有限公司 | Extensible cross-redundancy communication interface device and method |
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