CN104898547A - Detection method and detection device of wind power variable pitch PLC - Google Patents
Detection method and detection device of wind power variable pitch PLC Download PDFInfo
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- CN104898547A CN104898547A CN201510255977.2A CN201510255977A CN104898547A CN 104898547 A CN104898547 A CN 104898547A CN 201510255977 A CN201510255977 A CN 201510255977A CN 104898547 A CN104898547 A CN 104898547A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/15—Plc structure of the system
- G05B2219/15078—Modules, construction of system
Abstract
The invention discloses a detection method and a detection device of a wind power variable pitch PLC. The detection method and the detection device comprise a main control PLC, three groups of functional PLCs of A#, B# and C#, and a hoist. The main control PLC is used as a detection terminal. All to-be-detected functional modules in a wind power variable pitch PLC replace corresponding normal modules in the main control PLC, the A# PLC, the B# PLC, and the C# PLC. By observing operation states of the main control PLC and all functional PLCs connected to the main control PLC, detection for DIO, RTD and SSI modules in the wind power variable pitch PLC is achieved. According to the invention, targeted test for the same kind of modules is finished at a time and cable overall plug-in pieces are used between the PLC module and other modules and between modules and an external device, thereby achieving one-time plug-in, so repetitive work of disconnection of wires and wiring of all channels of the PLC is removed.
Description
Technical field
The application relates to PLC detection method and pick-up unit, particularly relates to a kind of wind electricity change paddle PLC detection method and pick-up unit.
Background technology
Wind energy as clean energy resource with fastest developing speed in regenerative resource, its scale and business-like development prospect, pay attention to by countries in the world.At present, the stable operation of PLC on wind power generating set controls, is generally admitted both at home and abroad.Variable-pitch control system is the important device of the above wind power generating set control and protection of MW class, is the service brake system of fan parking.Pitch-controlled system PLC is as the control core of pitch-controlled system, and the stability that its each functional module is run seems particularly important.
The change oar PLC of complete set comprises control module substantially, CAN main website communication module (controller local area network module, realize becoming communication between oar PLC and variable pitch driver), CAN slave station communication module (controller local area network module, realize becoming communication between oar PLC and blower fan master control), Profibus-DP slave station communication module (Process FieldbusROFIBUS module, realize becoming communication between oar PLC and blower fan master control, after this referred to as DP module), DIO module (number connect test module, major control the adhesive of control relay and disconnection), RTD module (resistance temperature detecting module, in order to detect the temperature value that PT100 reacts) and SSI module (synchronous serial interface module, in order to received code device angle value signal).
Pitch-controlled system PLC utilizes CAN slave station or DP slave station module by carrying out communication between CANopen or Profibus-DP bus and fan master control system, after the instruction of reception master location, makes control to blade position.Become the DIO module of oar PLC by receiving the 24V input peripheral hardware components and parts state of the feedbacks such as power supply, control knob and relay, by sending the start and stop of 24V signal opertaing device, by RTD module monitors emphasis device and ambient temperature, read current encoder angle value by SSI module.Because the sampling observation of change oar PLC module warehouse-in, test of dispatching from the factory, on-the-spot failed part return the confirmation all needing to carry out each important parameter, therefore need to design a set of change oar PLC special detection device and come alternative a whole set of pitch-controlled system and blower fan main control equipment, realize the specific aim test of module to be measured.The pick-up unit having PLC producer to devise to judge whether PLC module normally works, but the operational factor of pitch-controlled system PLC under special operation condition and demand cannot be detected.
Summary of the invention
The actual motion effect of each module of oar PLC under special operation condition is become for convenience of detecting, the application proposes with a set of main control PLC as sense terminals, the whole series to be detected are become each generic module in oar PLC and carry out specific aim test and unified process according to function grouping, use the method that the overall connector of cable is directly connected between PLC module with external device, the running status becoming each module of oar PLC can be detected in high-efficiency high-accuracy ground.
This application discloses a kind of wind electricity change paddle PLC pick-up unit and the wind electricity change paddle PLC detection method based on this pick-up unit.
The application is concrete by the following technical solutions:
A kind of wind electricity change paddle PLC detection method and pick-up unit, comprise main control PLC, A#, B#, C# tri-groups of PLC groups, it is characterized in that:
Take main control PLC as sense terminals, the functional module each to be measured of wind electricity change paddle PLC is replaced respectively the corresponding normal module in main control PLC, A#, B#, C#PLC group, observation main control PLC and be connected A#, B#, C# tri-groups of running statuses realize the detection to each module of DIO, RTD and SSI in wind electricity change paddle PLC.
Wind electricity change paddle PLC pick-up unit, comprise main control PLC, A#PLC group, B#PLC group, C#PLC group, host computer, for realizing the detection of 1 DP slave station module to wind electricity change paddle PLC to be measured, 1 CAN master station module, 3 CAN slave station modules, a group of DIO module, one group of RTD module and one group of SSI module; It is characterized in that:
Described main control PLC, A#PLC group, B#PLC group and C#PLC group configure normal PLC module before testing;
Wherein, described main control PLC configures one group of DIO module, 1 CAN master station module, 3 CAN slave station modules, 1 DP master station module and 1 DP slave station module;
Described A#PLC group configuration 1 DP slave station module, 1 CAN master station module and one group of DIO module;
Described B#PLC group configuration 1 CAN slave station module, 1 CAN master station module and one group of RTD module;
Described C#PLC configures 1 CAN slave station module, 1 CAN master station module and one group of SSI module;
The CAN master station module of the DP slave station module of 1 wind electricity change paddle PLC to be measured, 1 wind electricity change paddle PLC to be measured, the CAN slave station module of 3 wind electricity change paddle PLC to be measured are replaced original normal 1 the DP slave station module of main control PLC, 1 CAN master station module and 3 CAN slave station modules respectively, realizes the detection of the CAN slave station module to the DP slave station module of 1 wind electricity change paddle PLC to be measured, the CAN master station module of 1 wind electricity change paddle PLC to be measured and 3 wind electricity change paddle PLC to be measured;
The DIO module of wind electricity change paddle PLC to be measured is replaced the normal DIO module that A#PLC group first wife puts;
The RTD module of wind electricity change paddle PLC to be measured is replaced the normal RTD module that B#PLC group first wife puts;
The SSI module of wind electricity change paddle PLC to be measured is replaced the normal SSI module of C#PLC group Central Plains configuration;
3 in described main control PLC CAN slave station modules to be measured are connected respectively the CAN master station module of A#PLC group, B#PLC group, C#PLC group by CAN communication line, DP slave station module in A#PLC group is connected in main control PLC in DP master station module by Profibus-DP communication cable, and the CAN slave station module in B#PLC group and the CAN slave station module in C#PLC group are all connected in CAN master station module to be measured in main control PLC by CAN communication cable;
Data interaction is carried out by universal serial bus between described each PLC group inner module and module;
Overall plug-in unit is corresponding connects by cable for DIO module in described main control PLC and DIO module to be measured in A#PLC group, the input channel correspondence of the DIO module namely in main control PLC is connected to DIO module output channel to be detected, and the output channel correspondence of the DIO module in main control PLC is connected to DIO module input channel to be detected;
RTD module to be measured in B#PLC group is external variable resistor respectively;
SSI module to be measured in C#PLC group is external scrambler respectively;
CAN master station module to be measured in main control PLC is unified receives CAN slave station module information upload in B# and C#PLC group; 3 CAN slave station modules to be measured receive CAN master station module in A#, B# and C# three PLC groups respectively one to one and send information; DP master station module to receive in main control PLC DP slave station module in DP slave station to be measured and A#PLC group and sends information;
Described host computer connects main control PLC by netting twine, and testing staff shows the status information of each module in main control PLC and A#, B#, C#PLC group, by the start and stop of PC control trace routine by the visualization interface observation of having write in host computer.
The application also adopts following scheme:
Described wind electricity change paddle PLC pick-up unit also comprises AC/DC Switching Power Supply, and described AC/DC Switching Power Supply is main control PLC, A#PLC group, B#PLC group and C#PLC group provide 24V direct supply.
Between DIO module to be measured in DIO module in main control PLC and A#PLC group, in B#PLC group between RTD module to be measured and variable resistor, in C#PLC group, SSI module to be measured realizes being connected with all adopting the overall connector of cable between scrambler.The main body of the overall plug connector of described cable is insulating sheet material, perforate on insulating sheet material, and install fixing " word " type contact pin in hole, contact pin one end is " word " type metal draw point, is directly plugged on PLC corresponding module; Contact pin other end welding cable, cable one end can be selected to connect small-sized clip or external device, after the overall connector of this cable completes connection, carries out entirety fix by hasp and main control PLC or corresponding PLC group.
The transceiver path of main control PLC and A#PLC group, communication information between B#PLC group and C#PLC group is respectively: 1. by the DP master station module in main control PLC to the DP slave station module to be measured in main control PLC; 2. by the DP main control module of main control PLC to the DP slave station module of A#PLC group; 3. by CAN slave station module to be measured in the CAN master station module in main control PLC to B#PLC group; 4. by CAN slave station module to be measured in CAN master station module in main control PLC to C#PLC group; 5. CAN master station module, the CAN master station module of B#PLC group, the CAN master station module of C#PLC group of A#PLC group is corresponded to respectively by 3 CAN slave station modules to be measured of main control PLC; Wherein said communication information comprises heartbeat signal.
Disclosed herein as well is the detection method of a kind of wind electricity change paddle PLC based on above-mentioned wind electricity change paddle PLC pick-up unit, described detection method comprises the following steps:
Step 1: carry out initialization detection in 3 minutes after main control PLC, A#PLC group, B#PLC group and C#PLC group power on, heartbeat signal according to the automatic negate of PLC scan period is sent to A#PLC group, B#PLC group and C#PLC group by main control PLC, received heartbeat signal does not deal with and directly feeds back to main control PLC by each PLC group respectively that receive heartbeat signal, when there is change in main control PLC more each PLC group feedback heartbeat signal in 100ms, represent that communication is normal, enter next step; If the heartbeat signal that each PLC group is fed back in 100ms is always constant, then point out communication abnormality, need CAN communication cable, Profibus-DP communication cable, main control PLC, A#PLC group, CAN master station module that B#PLC group is corresponding to C#PLC group, CAN slave station module, DP master station module, DP slave station module are re-started to initialization after overhauling and detect, after communication is normal, enter next step;
Step 2: main control PLC is while sending heartbeat signal to A#PLC group, B#PLC group and C#PLC group, increase integer data and cumulative signal that transmission one each PLC scan period adds 1 automatically, each PLC group directly feeds back to main control PLC after the heartbeat signal received and cumulative signal; Main control PLC, by adjacent two periodic heartbeat signal values in more each communication path, calculates the constant number of times of heartbeat and maximum successive heartbeat not variable period; By the cumulative signal value that more current transmission cumulative signal and each communication path feed back, calculate cumulative signal maximum difference and communication time delay; A#PLC group, B#PLC group and CAN master station module in C#PLC group detect respectively and correspondingly to connect in main control PLC group 3 CAN slave station modules to be measured, main control PLC group calculates in 3 order circuits according to the communication data that 3 CAN slave station modules to be measured receive and occurs maximum successive heartbeat not variable period and communication time delay, when communication time delay is greater than the alarm threshold value of setting, then think in this order circuit between CAN slave station module to be measured and the CAN master station module of corresponding PLC group there is flash alternately or there is virtual connection in communication line, and this order circuit to be reported to the police; DP slave station module to be measured in main control PLC group is detected with DP master station module in main control PLC group, main control PLC group calculates in this order circuit according to the communication data that DP master station module to be measured receives and occurs maximum successive heartbeat not variable period and communication time delay, when communication time delay is greater than the alarm threshold value of setting, then think in this order circuit between DP slave station module to be measured and the DP master station module of corresponding main control PLC group there is flash alternately or there is virtual connection in communication line, and this order circuit to be reported to the police; CAN master station module to be measured in main control PLC group is detected with CAN slave station module in B#PLC group and C#PLC group, B# and C#PLC group calculates in 2 order circuits according to the communication data that CAN slave station module to be measured receives and occurs maximum successive heartbeat not variable period and communication time delay, when communication time delay is greater than the alarm threshold value of setting, then think between the CAN slave station module that CAN master station module to be measured in this order circuit and corresponding B# and C#PLC organize there is flash alternately or there is virtual connection in communication line, and this order circuit to be reported to the police;
Step 3: main control PLC all exports 24V signal by with the time interval set to be connected input channel with the output channel of the DIO module in A#PLC group.After the input channel reception 24V signal of A#PLC group DIO module to be measured, by the form of this signal syntheses binary code by DP master station module in DP slave station module feedback to main control PLC, if master control DIO module output channel exports that DIO module input channel reception condition in situation and A#PLC group is inconsistent and inconsistent life period is greater than setting-up time, then the input channel of DIO module to be measured is reported to the police; The time interval of setting is sent to DP slave station in A#PLC group by DP main website by main control PLC, A#PLC group is according to the time interval received, 24V signal is sent by the input channel of output channel DIO module to be measured in main control PLC of DIO module in this group PLC, if DIO module output channel exports that situation is inconsistent and inconsistent life period is greater than setting-up time in master control DIO module input channel reception condition and A#PLC group, then the output channel of DIO module to be measured is reported to the police;
In step 4:B#PLC group, each RTD module to be measured records the temperature value of corresponding variable resistance, and surveyed temperature value is sent in main control PLC, the temperature value in adjacent two cycles of same passage feedback in the real-time more same RTD module of main control PLC, when current rear cycle, temperature value change was greater than temperature variation setting value, then think that this RTD module exists fault, and report to the police;
Gray's code value that in step 5:C#PLC group, each SSI module acquires scrambler to be measured sends, and Gray's code value of collection is sent in main control PLC, main control PLC is by Gray's code value in adjacent two cycles of real-time more same SSI module feedback, when current rear cycle Gray code value change is greater than Gray code change setting value, then think this SSI module failure, and report to the police.
The application has following useful technique effect:
By above pick-up unit and detection method, can detect according to reality and need to classify to change oar PLC module, and unify specific aim test to similar module, the state-detection of each module can refine to 10ms.Use the overall connector of cable to realize disposable grafting between PLC module and module, between module and peripheral hardware (scrambler and variable resistor), eliminate the repeated work of PLC each passage solution line and wiring.
Accompanying drawing explanation
Fig. 1 is the wind electricity change paddle PLC structure of the detecting device schematic diagram of the application;
Fig. 2 is the overall connector vertical view of cable of the application;
Fig. 3 is the overall connector left view of cable of the application;
Fig. 4 is the module failure Cleaning Principle figure of the application;
Fig. 5 is the detection method schematic flow sheet of the wind electricity change paddle PLC of the application.
Specific embodiments
Below in conjunction with Figure of description, technical scheme of the present invention is described in further detail.
As shown in Figure 1, apply wind electricity change paddle PLC pick-up unit of the present invention, mainly comprise main control PLC, A#PLC group, B#PLC group, C#PLC group and host computer, in addition can external variable resistor and scrambler auxiliary detection.
Use CAN communication cable to be connected with DP communication cable (in figure shown in heavy line) between each PLC group, realize the information interaction of each PLC group; Data interaction is carried out by universal serial bus between module in each PLC group and module.Host computer connects main control PLC (shown in figure hollow core the arrow icon) by netting twine, and in the visualization interface write, check each module status of analysis; The DIO intermodule of A#PLC group and main control PLC, B#PLC group RTD module with between variable resistor, C#PLC group SSI module realizes being connected (in figure, dotted line is shown) with the overall connector of cable with between scrambler.
The start and stop of trace routine can be controlled in host computer visualization interface, wherein A#, B#, C# tri-groups of PLC detection mode and operated in visualization interface by testing staff detection time, complete unified setting by main control PLC.In visualization interface except having main control PLC group information and running program interface, also compiled A#, B#, C# tri-groups of PLC separate interface separately, testing staff according to specifically detecting needs, can observe each module channels to be measured.
Main control PLC, A#PLC group, B#PLC group and C#PLC group configure normal PLC module before testing.Wherein, main control PLC configures one group of DIO module, 1 CAN master station module, 3 CAN slave station modules, 1 DP master station module and 1 DP slave station module; A#PLC group configuration 1 DP slave station module, 1 CAN master station module and one group of DIO module; B#PLC group configuration 1 CAN slave station module, 1 CAN master station module and one group of RTD module; C#PLC configures 1 CAN slave station module, 1 CAN master station module and one group of SSI module.
For ensure detection accuracy, only exist in each PLC group a part of module can by module to be measured substitute, all the other modules use give tacit consent to normal module.During test, following replacement operation can be carried out as required: the CAN master station module of the DP slave station module of 1 wind electricity change paddle PLC to be measured, 1 wind electricity change paddle PLC to be measured, the CAN slave station module of 3 wind electricity change paddle PLC to be measured are replaced original normal 1 the DP slave station module of main control PLC, 1 CAN master station module and 3 CAN slave station modules respectively, realizes the detection of the CAN slave station module to the DP slave station module of 1 wind electricity change paddle PLC to be measured, the CAN master station module of 1 wind electricity change paddle PLC to be measured and 3 wind electricity change paddle PLC to be measured; The DIO module of wind electricity change paddle PLC to be measured is replaced the normal DIO module that A#PLC group first wife puts; The RTD module of wind electricity change paddle PLC to be measured is replaced the normal RTD module that B#PLC group first wife puts; The SSI module of wind electricity change paddle PLC to be measured is replaced the normal SSI module of C#PLC group Central Plains configuration;
As shown in Figure 2 and Figure 3, consider the simplicity of each PLC module wiring, use that the overall connector of cable realizes between module and module, the connection of module and external unit.The main body of the overall plug connector of cable is insulating sheet material, and it carries out perforate according to PLC module passage distribution situation, installs fixing " word " type contact pin in hole.Contact pin one end is " word " type metal draw point, can directly be plugged in PLC module; Contact pin other end welding cable, cable one end can be selected to connect small-sized clip or external device.After the overall connector of this cable completes connection, carry out entirety by hasp and PLC group to be measured and fix.
As shown in Figure 4, all kinds of change oar PLC module to be measured is replaced according to function and model different grouping and is installed in main control PLC, A#PLC group, B#PLC group and C#PLC group, detects by respective setting means, specific as follows:
The output channel of change oar DIO module to be measured in A#PLC group is detected with the input channel of main control PLC Plays DIO module, the change frequency of module output signal low and high level to be measured can set in host computer visualization interface, is transferred in A#PLC group by communication cable.If outside the state handoff delay limited, detect that DIO module to be measured exports situation different from set condition, then can make warning to respective channel.
The input channel of change oar DIO module to be measured in A#PLC group is detected with the output channel of main control PLC Plays DIO module, the 24V signal combination that each DIO module input channel receives becomes the form of binary code to feed back in main control PLC by A#PLC group, if module input channel Received signal strength to be measured outputs signal different from master control and sets outside time delay in state, then warning is made to respective channel.
With change oar RTD module to be measured in continuous variable resistance detection B#PLC group, detect different passage temperature deviation under same resistance, and whether same passage temperature in whole testing process there is saltus step.If interchannel collection value deviation be greater than maximum allowable offset or same passage before and after collection value there is saltus step, then warning is made to respective channel, and records this passage in the collection value of sense cycle before and after the moment of reporting to the police.
Detect change oar SSI module to be measured in C#PLC group with absolute value encoder, SSI module exact connect ion encoder clock positive and negative with the positive negative signal of data after, upload module acquires gained Gray code value to be checked.Testing staff can leave standstill or rotary encoder, checks whether gathered Gray's code value exception occurs.When occur adjacent periods gather the change of Gray's code value be greater than maximum permissible value time, then warning is made to this module, and Gray's code value in cycle before and after record change.
Described main control PLC sends heartbeat signal and cumulative signal in real time, and these the two kinds of signals received directly are returned to main control PLC by all the other each PLC groups.Main control PLC contrasts to the adjacent periods heartbeat value received, if heart beat status is constant, makes early warning, and screening is simultaneously added up and shows the longest heart beat status invariant time and the constant number of times of heartbeat.The cumulative signal that main control PLC is returned by cumulative signal and each PLC group of current transmission contrasts, and according to the communication time delay in the whole loop of mathematic interpolation, thus confirms that whether each change oar communication module to be measured is normal.
As shown in Figure 5, need to carry out type classification mark to module to be measured before carrying out module detection, and replace respectively in each PLC group of access.Use CAN and DP communication cable to realize connecting between communication module, use the overall connector of cable to realize module with intermodule, be connected between module with peripheral hardware.Complete mark and after being connected, divide 5 steps to carry out the detection of PLC module to be measured, described in specific as follows:
Step 1: because each module information in A#, B#, C# tri-PLC groups will be gathered in main control PLC by CAN and DP communication bus.Therefore, after wiring and module installation, communication between this 3 PLC groups and main control PLC first will be detected whether normal.A whole set of pick-up unit will carry out initialization detection to communication quality in 3 minutes upon actuation.In this period, main control PLC sends the heartbeat signal according to the automatic negate of PLC scan period by by CAN and DP bus to each PLC group, and each PLC group directly returns received data after reception heartbeat signal.According to communication failure time delay between the master control of current conventional megawatt-level wind unit and pitch-controlled system at 100ms ~ 200ms, therefore within initialization detection time, the main control PLC of this cover pick-up unit is checked to the data returned, if it is always constant to set the heartbeat signal fed back in 100ms, then point out communication abnormality, now need testing staff to be confirmed whether as communication cable or communication module problem.After module to be confirmed or cable problem, each PLC group need power on and restart, and after this again will perform initialization and detect, and guarantee that between each PLC group, communication will be normal.
Initialization will enter real-time detection-phase, now will carry out the test of each module to be checked after detecting and terminating.Main control PLC will once reset to preserving data before and after the fault value of each module to be measured and individual modules fault.Consider that in initialization procedure, people is the priority that maloperation and each PLC group electrifying startup exist in sequential, all PLC module all arrange independently reset function, remove inadvisable fault.
Step 2: cause without circuit question or module failure having no progeny in communication thoroughly between confirmation communication module, carry out the detection of next step communication quality.Now, main control PLC is while sending heartbeat signal to A#PLC group, B#PLC group and C#PLC group, increase integer data and cumulative signal that transmission one each PLC scan period adds 1 automatically, each PLC group directly feeds back to main control PLC after the heartbeat signal received and cumulative signal.Main control PLC is by the heartbeat signal of two PLC scan periods adjacent in each for real-time compare of analysis communication path.If adjacent two periodic heartbeat signals are all 1 or are 0, then carry out adding up (these data and the continuous not variable period of heartbeat), until reset the continuous not variable period of current heartbeat after the periodic heartbeat signal intensity of front and back.In whole test process, main control PLC automatic screening can retain the continuous not variable period of maximum heartbeat.At detection heartbeat signal simultaneously, main control PLC also calculates current each cumulative signal of passage transmission and the cumulative signal difference (i.e. communication delay time) of reception, automatically preserves maximum communication delay time.This cover pick-up unit detects respectively with A#PLC group, B#PLC group and CAN master station module in C#PLC group and correspondingly to connect in main control PLC group 3 pieces of CAN slave station modules to be measured, and the communication data that main control PLC group is received by CAN slave station module calculates maximum heartbeat not variable period and maximum communication delay time continuously according to said method.When these two value is greater than the alarm threshold value of setting, then thinks that CAN slave station module to be measured and normal CAN master station module information interaction exist flash, and CAN slave station module to be measured is reported to the police.In like manner, detect DP slave station module in main control PLC group with DP master station module in main control PLC group, detect CAN master station module to be measured in main control PLC group with CAN slave station module in B#PLC group and C#PLC group.The continuous not variable period of the current heartbeat of each module to be measured, Current communications delay time, maximum heartbeat continuous not variable period and maximum communication delay time all can show in host computer interface above, are convenient to testing staff and the very first time obtain related data.
Step 3: between the main control PLC confirming this device and each PLC group after communication normally, enters next stage test.Now, in main control PLC group Plays DIO module and A#PLC group, the output channel of DIO module to be measured exports 24V signal (this time interval can have tester to set) according to the time interval that master control sets.The input channel reception condition of DIO module to be measured and output channel are exported the form that situation is combined into binary code by A#PLC group, are uploaded in the corresponding link block of main control PLC by CAN main website and DP slave station.This group configuration Plays DIO module constrained input passage transmitting-receiving situation and reception A#PLC group uploading data are checked by main control PLC.If master control DIO module output channel exports the inconsistent and inconsistent life period of DIO module input channel reception condition in situation and A#PLC group more than 6 PLC scan periods (60ms), then corresponding to DIO module to be measured input channel is reported to the police; If DIO module output channel exports the inconsistent and inconsistent life period of situation more than 6 PLC scan periods (60ms) in master control DIO module input channel reception condition and A#PLC group, then corresponding to DIO module to be measured output channel is reported to the police.When the passage of DIO module to be measured exists warning, in host computer visualization interface, the corresponding pilot lamp of corresponding DIO module channels to be measured will become redness from green.
Step 4:B#PLC group is uploaded in main control PLC by CAN main website and slave station after RTD module acquires temperature value to be measured is converted into integer variable form.Main control PLC is the temperature value in adjacent two cycles of same passage feedback in more same RTD module in real time, current when the rear cycle, temperature value change was greater than temperature variation setting value, then think that this RTD module exists fault, and report to the police.Maximumly in the current collecting temperature value of each passage of RTD module to be measured, whole test process all to show in host computer interface with minimum temperature value, front and back cycle maximum temperature difference.When reporting to the police appears in certain passage of module to be measured, the corresponding module channels lamp to be measured of host computer interface will become redness from green.
Gray's code value that in step 5::C#PLC group, each SSI module acquires scrambler to be measured sends, and Gray's code value of collection is sent in main control PLC by CAN main website and slave station, main control PLC is by Gray's code value in adjacent two cycles of real-time more same SSI module feedback.When current rear cycle, the change of Gray code value was greater than setting threshold value, then think this SSI module failure, and report to the police.Before and after the current collection Gray code value of SSI module to be measured, saltus step, Gray's code value all shows in host computer interface.When reporting to the police appears in module to be measured, the corresponding module status lamp to be measured of host computer interface will become redness from green.
This pick-up unit will show total detection time in host computer interface, when any module to be measured breaks down, main control PLC will preserve communication heart beat status and the communication delay time of fault moment and front and back one-period automatically, carry out with this reason that synthetic determination breaks down.
Claims (6)
1. wind electricity change paddle PLC detection method and a pick-up unit, comprises main control PLC, A#, B#, C# tri-groups of PLC groups, it is characterized in that:
Take main control PLC as sense terminals, the functional module each to be measured of wind electricity change paddle PLC is replaced respectively the corresponding normal module in main control PLC, A#, B#, C#PLC group, observation main control PLC and be connected A#, B#, C# tri-groups of running statuses realize the detection to each module of DIO, RTD and SSI in wind electricity change paddle PLC.
2. a wind electricity change paddle PLC pick-up unit, comprise main control PLC, A#PLC group, B#PLC group, C#PLC group, host computer, for realizing the detection of 1 DP slave station module to wind electricity change paddle PLC to be measured, 1 CAN master station module, 3 CAN slave station modules, a group of DIO module, one group of RTD module and one group of SSI module; It is characterized in that:
Described main control PLC, A#PLC group, B#PLC group and C#PLC group configure normal PLC module before testing;
Wherein, described main control PLC configures one group of DIO module, 1 CAN master station module, 3 CAN slave station modules, 1 DP master station module and 1 DP slave station module;
Described A#PLC group configuration 1 DP slave station module, 1 CAN master station module and one group of DIO module;
Described B#PLC group configuration 1 CAN slave station module, 1 CAN master station module and one group of RTD module;
Described C#PLC configures 1 CAN slave station module, 1 CAN master station module and one group of SSI module;
The CAN master station module of the DP slave station module of 1 wind electricity change paddle PLC to be measured, 1 wind electricity change paddle PLC to be measured, the CAN slave station module of 3 wind electricity change paddle PLC to be measured are replaced original normal 1 the DP slave station module of main control PLC, 1 CAN master station module and 3 CAN slave station modules respectively, realizes the detection of the CAN slave station module to the DP slave station module of 1 wind electricity change paddle PLC to be measured, the CAN master station module of 1 wind electricity change paddle PLC to be measured and 3 wind electricity change paddle PLC to be measured;
The DIO module of wind electricity change paddle PLC to be measured is replaced the normal DIO module that A#PLC group first wife puts;
The RTD module of wind electricity change paddle PLC to be measured is replaced the normal RTD module that B#PLC group first wife puts;
The SSI module of wind electricity change paddle PLC to be measured is replaced the normal SSI module of C#PLC group Central Plains configuration;
3 in described main control PLC CAN slave station modules to be measured are connected respectively the CAN master station module of A#PLC group, B#PLC group, C#PLC group by CAN communication line, DP slave station module in A#PLC group is connected in main control PLC in DP master station module by Profibus-DP communication cable, and the CAN slave station module in B#PLC group and the CAN slave station module in C#PLC group are all connected in CAN master station module to be measured in main control PLC by CAN communication cable;
Data interaction is carried out by universal serial bus between described each PLC group inner module and module;
Overall plug-in unit is corresponding connects by cable for DIO module in described main control PLC and DIO module to be measured in A#PLC group, the input channel correspondence of the DIO module namely in main control PLC is connected to DIO module output channel to be detected, and the output channel correspondence of the DIO module in main control PLC is connected to DIO module input channel to be detected;
RTD module to be measured in B#PLC group is external variable resistor respectively;
SSI module to be measured in C#PLC group is external scrambler respectively;
CAN master station module to be measured in main control PLC is unified receives CAN slave station module information upload in B# and C#PLC group; 3 CAN slave station modules to be measured receive CAN master station module in A#, B# and C# three PLC groups respectively one to one and send information; DP master station module to receive in main control PLC DP slave station module in DP slave station to be measured and A#PLC group and sends information;
Described host computer connects main control PLC by netting twine, and testing staff shows the status information of each module in main control PLC and A#, B#, C#PLC group, by the start and stop of PC control trace routine by the visualization interface observation of having write in host computer.
3. wind electricity change paddle PLC pick-up unit according to claim 2, is characterized in that:
Described wind electricity change paddle PLC pick-up unit also comprises AC/DC Switching Power Supply, and described AC/DC Switching Power Supply is main control PLC, A#PLC group, B#PLC group and C#PLC group provide 24V direct supply.
4. wind electricity change paddle PLC pick-up unit according to claim 2, is characterized in that:
Between DIO module to be measured in DIO module in main control PLC and A#PLC group, in B#PLC group between RTD module to be measured and variable resistor, in C#PLC group, SSI module to be measured realizes being connected with all adopting the overall connector of cable between scrambler; The main body of the overall plug connector of described cable is insulating sheet material, perforate on insulating sheet material, and install fixing " word " type contact pin in hole, contact pin one end is " word " type metal draw point, is directly plugged on PLC corresponding module; Contact pin other end welding cable, cable one end can be selected to connect small-sized clip or external device, after the overall connector of this cable completes connection, carries out entirety fix by hasp and main control PLC or corresponding PLC group.
5. wind electricity change paddle PLC pick-up unit according to claim 2, is characterized in that:
The transceiver path of main control PLC and A#PLC group, communication information between B#PLC group and C#PLC group is respectively: 1. by the DP master station module in main control PLC to the DP slave station module to be measured in main control PLC; 2. by the DP main control module of main control PLC to the DP slave station module of A#PLC group; 3. by CAN slave station module to be measured in the CAN master station module in main control PLC to B#PLC group; 4. by CAN slave station module to be measured in CAN master station module in main control PLC to C#PLC group; 5. CAN master station module, the CAN master station module of B#PLC group, the CAN master station module of C#PLC group of A#PLC group is corresponded to respectively by 3 CAN slave station modules to be measured of main control PLC; Wherein said communication information comprises heartbeat signal.
6., based on a detection method of the wind electricity change paddle PLC of the wind electricity change paddle PLC pick-up unit described in claim 2-5, described detection method comprises the following steps:
Step 1: carry out initialization detection in 3 minutes after main control PLC, A#PLC group, B#PLC group and C#PLC group power on, heartbeat signal according to the automatic negate of PLC scan period is sent to A#PLC group, B#PLC group and C#PLC group by main control PLC, received heartbeat signal does not deal with and directly feeds back to main control PLC by each PLC group respectively that receive heartbeat signal, when there is change in main control PLC more each PLC group feedback heartbeat signal in 100ms, represent that communication is normal, enter next step; If the heartbeat signal that each PLC group is fed back in 100ms is always constant, then point out communication abnormality, need CAN communication cable, Profibus-DP communication cable, main control PLC, A#PLC group, CAN master station module that B#PLC group is corresponding to C#PLC group, CAN slave station module, DP master station module, DP slave station module are re-started to initialization after overhauling and detect, after communication is normal, enter next step;
Step 2: main control PLC is while sending heartbeat signal to A#PLC group, B#PLC group and C#PLC group, increase integer data and cumulative signal that transmission one each PLC scan period adds 1 automatically, each PLC group directly feeds back to main control PLC after the heartbeat signal received and cumulative signal; Main control PLC, by adjacent two periodic heartbeat signal values in more each communication path, calculates the constant number of times of heartbeat and maximum successive heartbeat not variable period; By the cumulative signal value that more current transmission cumulative signal and each communication path feed back, calculate cumulative signal maximum difference and communication time delay; A#PLC group, B#PLC group and CAN master station module in C#PLC group detect respectively and correspondingly to connect in main control PLC group 3 CAN slave station modules to be measured, main control PLC group calculates in 3 order circuits according to the communication data that 3 CAN slave station modules to be measured receive and occurs maximum successive heartbeat not variable period and communication time delay, when communication time delay is greater than the alarm threshold value of setting, then think in this order circuit between CAN slave station module to be measured and the CAN master station module of corresponding PLC group there is flash alternately or there is virtual connection in communication line, and this order circuit to be reported to the police; DP slave station module to be measured in main control PLC group is detected with DP master station module in main control PLC group, main control PLC group calculates in this order circuit according to the communication data that DP master station module to be measured receives and occurs maximum successive heartbeat not variable period and communication time delay, when communication time delay is greater than the alarm threshold value of setting, then think in this order circuit between DP slave station module to be measured and the DP master station module of corresponding main control PLC group there is flash alternately or there is virtual connection in communication line, and this order circuit to be reported to the police; CAN master station module to be measured in main control PLC group is detected with CAN slave station module in B#PLC group and C#PLC group, B# and C#PLC group calculates in 2 order circuits according to the communication data that CAN slave station module to be measured receives and occurs maximum successive heartbeat not variable period and communication time delay, when communication time delay is greater than the alarm threshold value of setting, then think between the CAN slave station module that CAN master station module to be measured in this order circuit and corresponding B# and C#PLC organize there is flash alternately or there is virtual connection in communication line, and this order circuit to be reported to the police;
Step 3: main control PLC all exports 24V signal by with the time interval set to be connected input channel with the output channel of the DIO module in A#PLC group, after the input channel reception 24V signal of A#PLC group DIO module to be measured, by the form of this signal syntheses binary code by DP master station module in DP slave station module feedback to main control PLC, if master control DIO module output channel exports that DIO module input channel reception condition in situation and A#PLC group is inconsistent and inconsistent life period is greater than setting-up time, then the input channel of DIO module to be measured is reported to the police; The time interval of setting is sent to DP slave station in A#PLC group by DP main website by main control PLC, A#PLC group is according to the time interval received, 24V signal is sent by the input channel of output channel DIO module to be measured in main control PLC of DIO module in this group PLC, if DIO module output channel exports that situation is inconsistent and inconsistent life period is greater than setting-up time in master control DIO module input channel reception condition and A#PLC group, then the output channel of DIO module to be measured is reported to the police;
In step 4:B#PLC group, each RTD module to be measured records the temperature value of corresponding variable resistance, and surveyed temperature value is sent in main control PLC, the temperature value in adjacent two cycles of same passage feedback in the real-time more same RTD module of main control PLC, when current rear cycle, temperature value change was greater than temperature variation setting value, then think that this RTD module exists fault, and report to the police;
Gray's code value that in step 5:C#PLC group, each SSI module acquires scrambler to be measured sends, and Gray's code value of collection is sent in main control PLC, main control PLC is by Gray's code value in adjacent two cycles of real-time more same SSI module feedback, when current rear cycle Gray code value change is greater than Gray code change setting value, then think this SSI module failure, and report to the police.
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