CN108845548B - DCS and distribution method for realizing IO hard-wired distribution based on software configuration - Google Patents
DCS and distribution method for realizing IO hard-wired distribution based on software configuration Download PDFInfo
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Abstract
In order to simplify the IO hard-wired distribution design work in the DCS engineering application process, the invention discloses a DCS and a distribution method for realizing IO hard-wired distribution based on software configuration. The DCS has the following characteristics: the main control case is independent from the IO case; all IO functional modules are designed to be inserted in front; terminal blocks in the form of terminal posts are used for all IO hard wiring designs; the wiring code base is designed for field signals with different wiring modes; selecting a wiring type code for software configuration; the system automatically distributes the terminal post positions according to the software configuration information; the system generates an IO hard-wired point table. The invention can simplify the IO hard-wired distribution design work in the DCS engineering application process, ensure the consistency of the software configuration definition and the IO hard-wired distribution design and improve the efficiency of the engineering design.
Description
Technical Field
The present invention relates to a distributed Control system dcs (distributed Control system) in industrial Control.
Background
In a conventional DCS product, a hardware architecture of the DCS product generally includes a controller module, a communication module, an IO function module, an IO terminal module, and some of the DCS products also include an IO adaptor module. Wherein, IO terminal module corresponds with IO functional module, and for dedicated module, it will have an IO terminal module corresponding to have an IO functional module, uses dedicated IO prefabricated cable to connect between IO terminal module and IO quick-witted case or the IO switching module usually.
In the stage of DCS engineering design, the equipment configuration definition is only responsible for defining the IO functional module and signals corresponding to each channel in the IO functional module. And after the configuration work is finished, designing an IO hard wiring point table according to the defined IO functional module and the defined signal, and supplementing the position information of the IO switching module and the IO terminal module so as to finish the IO hard wiring point table.
The main disadvantages of this DCS system in engineering design are the following:
(1) the engineering design is multi-task and long in engineering design time. Equipment configuration, IO signal definition and IO hard wiring point table design are required, the work basically belongs to a waterfall type serial development mode, and the time period is long.
(2) The engineering design labor cost is high. The amount of manpower will also be high based on the drawbacks of multiple engineering design tasks.
(3) The design error probability is high. Because the position information of the IO switching module and the IO terminal module is manually completed by designers in the design process of the IO hard wiring point table, especially for some large projects, the IO point specification is thousands of, and when the information is filled in a form, people often easily see and fill in mistakes when facing to the form with huge data volume.
Disclosure of Invention
In order to solve the above problems, the present invention provides a DCS and a distribution method that can implement automatic IO hard-wired distribution based on software configuration.
A distributed control system DCS based on software configuration and capable of achieving IO hard-wired automatic distribution mainly comprises: the system comprises a main control cabinet, an IO cabinet, a terminal board module and an engineer station; wherein the content of the first and second substances,
the main control case comprises a controller modules NPU, B external communication modules CMU, C IO bus modules BSU and d maintenance management modules MNU, wherein a is 1 or 2, B is a B, B is not less than 1, C is a C, and C is not less than 1. B is the number of external communication modules configured by each controller module NPU, C is the number of IO bus modules configured by each controller module NPU;
the IO chassis comprises a IO communication modules ICU and e IO functional modules; the IO communication module ICU is connected with an IO bus module BSU of the main control case based on a serial bus and is used for communication between data of the IO module and a controller module NPU, each IO function module comprises n channels, each channel corresponds to a type of signal variable during configuration, and all the IO function modules are in front insertion design on the IO case;
the IO chassis also comprises a wiring terminal which is arranged for each IO functional module slot position and is determined in position;
the front side of the terminal board module is connected to a signal hard wire outside the cabinet, and the back side of the terminal board module is connected to a terminal post terminal of the IO chassis;
the engineer station is used for designing a control logic algorithm in the controller module NPU and has the functions of configuration, online monitoring, diagnosis and information import and export;
the engineer station comprises a wiring type code library, each wiring type code comprises a signal variable type, a wiring code number, a signal variable description, a signal variable name and an associated module type, and each wiring code number corresponds to one unique signal variable;
the engineer station automatically associates the IO signal variable with the corresponding external wiring position according to the IO cabinet number, the IO functional module model, the slot number, the variable channel number and the variable wiring code number, creates an IO variable list and an IO hard wiring list, automatically configures the number of used terminal boards, and automatically distributes the IO module back terminal wiring terminal position and the terminal board module wiring terminal position associated with each signal variable.
A method for realizing IO hard-wired automatic distribution in a Distributed Control System (DCS) based on software configuration comprises the following steps:
the first step, a controller module NPU, B external communication module CMU, C IO bus module BSU, d maintenance management module MNU, B a B, B is not less than 1, C a C, C is not less than 1. B is the number of external communication modules configured by each controller module NPU, C is the number of IO bus modules configured by each controller module NPU;
secondly, an IO chassis of the DCS is arranged to comprise a IO communication modules ICU and e IO function modules; the IO communication module ICU is connected with an IO bus module BSU of the main control case based on a serial bus and is used for communication between data of the IO module and an NPU of the controller module, each IO functional module comprises n channels, and each channel corresponds to a type of signal variable during configuration;
thirdly, arranging an IO chassis to design a wiring terminal with a determined position for each IO functional module slot;
fourthly, the front side of the terminal board module is connected into a cabinet external signal hard wiring, and the back side of the terminal board module is connected with a terminal post terminal of the IO cabinet;
fifthly, designing a wiring type code base, wherein each wiring type code comprises a signal variable type, a wiring code number, a signal variable description, a signal variable name and an associated module type, and each signal variable is assigned with a wiring code number, so that the hard wiring included by the variable correspondingly is determined;
sixthly, automatically associating an external wiring position corresponding to the IO variable according to the number of the IO cabinet, the model of the IO functional module, the slot number, the variable channel number and the variable wiring code number, and creating an IO variable list and an IO hard wiring list;
and seventhly, realizing automatic IO hard wiring distribution according to the IO variable list and the IO hard wiring list.
The invention has the beneficial effects that:
firstly, when engineering design is carried out, after equipment configuration and IO signal definition work are finished, the IO hard wiring point table does not need to be designed independently, and an engineer station can directly generate the IO hard wiring point table. The process of engineering design is simplified, the efficiency of engineering design is improved, and the error probability of design is reduced.
Secondly, the cabinet is simple in layout and installation. The inside right side of rack is main control machine case and IO quick-witted case, and the institute inclines the standard terminal board module that is the terminal column form, compares with traditional special IO module, IO terminal module form DCS, need not to consider again the mounted position, the overall arrangement scheduling problem of IO terminal module. The layout design of the cabinet is simpler, and the work such as installation, wiring and the like in the cabinet is easier to develop.
Drawings
Fig. 1 is an overall schematic diagram of the connection mode of the IO chassis and the terminal board module.
Fig. 2 is a schematic diagram of a redundant IO bus of an IO chassis.
Fig. 3 is a schematic diagram of an IO module and terminal wiring layout.
FIG. 4 is a distribution of external hard-wired signals of the AIU module to the binding posts.
FIG. 5 is a sample wiring type code base.
FIG. 6 is a flow chart of the system implementation of the work flow for automatically assigning IO hardwiring during engineering configuration.
Detailed Description
The following description of the embodiments of the present invention is provided in connection with the accompanying drawings and examples. It should be noted that the detailed description is only for the purpose of making the invention easier and clearer for those skilled in the art, and is not intended to be a limiting explanation of the invention.
The DCS system based on the software configuration can realize IO hard-wired distribution. The system comprises a main control case, an IO case, a terminal board module, an engineer station and related external components. The external components mainly comprise a power switch and a power distribution interface.
A standard cabinet is designed, all cabinets are installed on the right side inside the cabinet, and all IO hard-wired terminal board modules on the connection site are arranged outside the cabinet on the left side of the cabinet. The terminal board module adopts a standardized design, the back surface of the terminal board module is provided with a binding post, and the binding post on the back surface of the IO case is a hard wiring in the cabinet. The front of the terminal block module is also a terminal post to which IO from the field is hard wired.
The main control case is divided into two parts which are symmetrical left and right from a central line, and each part can comprise a controller module NPU, an external communication module CMU, an IO bus module BSU and a maintenance management module MNU. The external communication module CMU is used for communicating with other control stations or servers, the IO bus module BSU is used for communicating with the main control case and the IO case, and the maintenance management module MNU is used for downloading and diagnosing application programs and the like. The left and right symmetrical parts can be configured into a double redundant controller or a single controller according to requirements. When the redundant mode is configured, the types and the number of the modules of the left part and the right part are the same.
The IO chassis comprises an IO communication module ICU and a plurality of IO functional modules. Each IO chassis supports a maximum of 14 IO functional modules. The IO communication module ICU is connected with an IO bus module BSU of the main control case on the basis of a serial bus and is used for communicating data of the IO module with a controller module NPU. When the controller is configured as dual redundancy, two IO communication modules of each IO chassis need to be configured. The IO bus inside the IO chassis is a redundant bus, so that normal communication between each IO functional module and the two IO communication modules is ensured. As shown in fig. 2.
The main control case is provided with a controller module NPU, b external communication module CMU, c IO bus module BSU and d maintenance management modules MNU. Wherein a is 1 or 2, B is a B, B is more than or equal to 1, C is a C, C is more than or equal to 1. The external communication module CMU is used for communication between the station and other stations, and B is the number of external communication modules configured by each controller module NPU, the value of which depends on the number of external communications. The IO bus module BSU is used for communication between the main control case and the IO case, and C is the number of the IO bus modules configured by each controller module NPU, and the numerical value of the number depends on the number of the IO cases.
Each IO chassis comprises a IO communication modules ICU and e IO functional modules. The IO communication module ICU is connected with an IO bus module BSU of the main control case based on a serial bus and is used for communication between IO module data of the case and a controller module NPU.
The IO functional module comprises an analog input module AIU, a digital input module DIU, a temperature acquisition module TIU, an analog output module AOU and a digital output module DOU.
All IO functional modules are designed to be inserted in front on the IO chassis. And a wiring terminal with a determined position is designed for each IO functional module slot on the back of the IO case. The number n of channels included in each IO functional module is different, each channel corresponds to a type of signal variable in the configuration, and the maximum possible number of connection points included in each type of signal variable is q. Therefore, each IO functional module includes the maximum possible number m of hard-wired points n q. The maximum possible number m of hard-wired points contained in each type of IO functional module is different. In the IO chassis, the number of the wiring posts on the back of each slot position is designed according to the maximum number of hard wiring points in the five types of IO functional modules. The connector locations of all hard-wired points that each channel in each IO functional module may contain are determined. Each terminal board module is designed in a standard mode, and the number of the binding posts on the terminal board module is equal to that of the binding posts on the back of each slot of the IO chassis.
For example, the digital input module DIU includes 16 independent digital acquisition channels, i.e., can be configured as 16 independent BI type variables. Each BI type variable may contain several of the three hard-wired points C, NO, and NC. Therefore, the maximum possible number of connection points included in one digital input module DIU is 16 × 3 — 48.
The maximum possible number of the connection points of the five types of IO functional modules is calculated as follows:
mAIU＝8*4＝32，
mDIU＝16*3＝48，
mTIU＝4*4+4*2＝24，
mAOU＝8*3＝24
mDOU＝16*2＝32
and taking the maximum value 48 of the maximum possible wiring point number of the five types of IO functional modules as the design number of the external wiring posts corresponding to each IO functional module slot position. The external wiring terminal arrangement of the IO functional module is designed to be 3 x 16 on the back of the IO chassis, and each row has 3 rows of wiring terminals, and 16 rows are total. The different signal terminal positions of the channels of each type of IO functional module are fixed, and the positions of the signals of the channels of the AIU module on the terminals are shown in fig. 4. Because 32 binding posts are needed by each AIU, for the AIU module, the last 16 binding posts of the IO functional module slot are free and not used for distribution.
Standard terminal block modules are designed. The front side of the terminal board is responsible for accessing an external signal hard connection of the cabinet, and the back side of the terminal board is responsible for connecting a binding post on the back side of the IO cabinet. The binding post on every standard terminal board module is arranged 8 x 6, namely 8 binding posts in every row, 6 rows altogether, just corresponds the binding post quantity of an IO function module trench. In practical application, according to the number of IO chassis used in configuration of the equipment, and the number of IO functional modules allocated to each chassis, the system automatically designs and allocates terminal board modules in corresponding number. If the corresponding IO functional module has an idle binding post, the binding post at the corresponding position of the terminal board can also be idle. As shown in fig. 3.
The DCS product also comprises an engineer station used for designing a control logic algorithm in the controller, and the engineer station has the functions of configuration, online monitoring, diagnosis, information import and export and the like.
The engineer station includes a wiring type code base. Each signal variable needs to define a wiring type code during configuration. One wiring type code defines all the wiring point information that the signal will contain and the IO function module model that the signal corresponds to using. Several wiring type codes may be used for one model of IO function module.
As shown in fig. 5, the configuration engineer station associates a wiring type code base. In the wiring type code library, each wiring type code may contain information such as a signal variable type, a wiring code number, a signal variable description, a signal variable name, and an associated module type. If a variable specifies a wiring code number, the hard wiring that the variable contains is determined.
After the engineer station completes the equipment configuration and the variable configuration, the number of the used terminal boards is automatically configured according to the IO channel information configured by the engineering configuration and the wiring information of the signals, the positions of the terminal posts on the back side of the IO module and the positions of the terminal posts of the terminal boards module related to each signal are automatically distributed, and an IO hard wiring point table is automatically generated.
As shown in fig. 6, when engineering configuration is performed by using an engineer station, the automatic allocation process of the system is as follows:
first, the device configuration is performed. And newly building a station, distributing station numbers and other information. And configuring IO cabinets, namely configuring the IO cabinets from top to bottom in the cabinets, wherein each cabinet is provided with at most three IO cabinets. And then configuring the functional modules of the slot positions of each chassis, wherein the slot positions of the functional modules in the IO chassis are distributed into 1 to 14 according to the sequence from right to left. After this step is completed, the system automatically configures the standard terminal board modules to be used, and corresponds each IO functional module to the terminal board module number one by one, for example, the terminal board module number corresponding to the IO module in the 7 th slot on the third IO chassis is 2 × 14+7 — 35. The row numbers of the terminal board modules are automatically assigned in the order from top to bottom, each terminal board having 6 rows of terminals, the first terminal board module having row numbers of 1 to 6 and the second terminal board module having row numbers of 7 to 12. Taking the 7 th slot position IO module on the third IO chassis as an example, the terminal board module number associated with the IO module is 35, and the line number is 205-210. The column numbers of the terminal block modules are sorted alphabetically from a to H.
And secondly, carrying out IO variable configuration, and defining an IO variable and a wiring code number of the variable for each channel of each IO functional module.
And thirdly, automatically associating the external wiring position corresponding to the IO variable by the system according to the case number, the IO functional module model, the slot number, the variable channel number and the variable wiring code number. An IO variable manifest and an IO hard-wired manifest are created.
The following is a design example.
Newly building a control station No. 1 station, configuring an expansion IO chassis, configuring an AIU module at a slot position 1 of the chassis, configuring a variable 001MD in a first channel of the module, and enabling a wiring type code of the variable to be CW 101.
A DIU module is configured in the 2-slot position, a variable 001SN is configured on the first channel of the DIU module, and the wiring type code of the variable is CW 001.
In conjunction with the wiring type code base of FIG. 5, the system automatically creates an IO variable list of variables and an IO hardwired list as follows.
Table 1 IO variable List example
Table 1 IO hard-wired List example
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof in any way. It should be noted that any person skilled in the art can make several improvements and modifications without departing from the principle of the invention, and these improvements and modifications should also be considered as the protection scope of the invention.
Claims (3)
1. A distributed control system DCS based on software configuration and capable of realizing IO hard-wired automatic distribution mainly comprises: the system comprises a main control cabinet, an IO cabinet, a terminal board module and an engineer station; wherein the content of the first and second substances,
the main control case comprises a controller modules NPU, B external communication modules CMU, C IO bus modules BSU, d maintenance management modules MNU, B is a B, B is not less than 1, C is a C, C is not less than 1, B is the number of external communication modules configured by each controller module NPU, and C is the number of IO bus modules configured by each controller module NPU;
the IO chassis comprises a IO communication modules ICU and e IO functional modules; the IO communication module ICU is connected with an IO bus module BSU of the main control case based on a serial bus and is used for communication between data of the IO module and a controller module NPU, each IO function module comprises n channels, each channel corresponds to a type of signal variable during configuration, and all the IO function modules are in front insertion design on the IO case;
the IO chassis also comprises a wiring terminal which is arranged for each IO functional module slot position and is determined in position;
the front side of the terminal board module is connected to a signal hard wire outside the cabinet, and the back side of the terminal board module is connected to a terminal post terminal of the IO chassis;
the engineer station is used for designing a control logic algorithm in the controller module NPU and has the functions of configuration, online monitoring, diagnosis and information import and export;
the engineer station comprises a wiring type code library, each wiring type code comprises a signal variable type, a wiring code number, a signal variable description, a signal variable name and an associated module type, and each wiring code number corresponds to one unique signal variable;
the engineer station automatically associates an IO signal variable with a corresponding external wiring position according to an IO cabinet number, an IO functional module model, a slot number, a variable channel number and a variable wiring code number, creates an IO variable list and an IO hard wiring list, automatically configures the number of used terminal board modules according to IO channel information configured by engineering configuration and wiring information of signals after completing equipment configuration and variable configuration, automatically allocates the position of a terminal post at the back of the IO module and the position of a terminal post of the terminal board module associated with each signal, and automatically generates an IO hard wiring point table;
the terminal block distribution of the terminal block module corresponds to the terminal block terminals of the IO chassis from top to bottom and from left to right in sequence; the terminal block module is designed in a standard mode, and the number of the terminals on the terminal block module is equal to that of the terminals on the back of each slot of the IO chassis;
according to the number of IO chassis used and the number of IO functional modules distributed by each chassis, automatically designing and distributing terminal board modules with corresponding number by the system; if the corresponding IO functional module has an idle binding post, the binding post at the corresponding position of the terminal board is also idle.
2. The DCS of claim 1, the IO functional modules comprising an analog input module AIU, a digital input module DIU, a temperature acquisition module TIU, an analog output module AOU, a digital output module DOU.
3. A method for realizing IO hard-wired automatic distribution in a Distributed Control System (DCS) based on software configuration comprises the following steps: firstly, a main control computer box of the DCS is arranged to comprise a controller modules NPU, B external communication modules CMU, C IO bus modules BSU, d maintenance management modules MNU, B is a B, B is not less than 1, C is a C, C is not less than 1, B is the number of the external communication modules configured by each controller module NPU, and C is the number of the IO bus modules configured by each controller module NPU;
secondly, an IO chassis of the DCS is arranged to comprise a IO communication modules ICU and e IO function modules; the IO communication module ICU is connected with an IO bus module BSU of the main control case based on a serial bus and is used for communication between data of the IO module and an NPU of the controller module, each IO functional module comprises n channels, and each channel corresponds to a type of signal variable during configuration;
thirdly, arranging an IO chassis to design a wiring terminal with a determined position for each IO functional module slot;
fourthly, the front side of the terminal board module is connected into a cabinet external signal hard wiring, and the back side of the terminal board module is connected with a terminal post terminal of the IO cabinet;
fifthly, designing a wiring type code base, wherein each wiring type code comprises a signal variable type, a wiring code number, a signal variable description, a signal variable name and an associated module type, and each signal variable is assigned with a wiring code number, so that the hard wiring included by the variable correspondingly is determined;
sixthly, automatically associating an external wiring position corresponding to the IO variable according to the number of the IO cabinet, the model of the IO functional module, the slot number, the variable channel number and the variable wiring code number, and creating an IO variable list and an IO hard wiring list;
and seventhly, realizing automatic IO hard wiring distribution according to the IO variable list and the IO hard wiring list.
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