The change of standard of safety net sth resembling a net makes safety can control coexistence with the standard at same a network is medium, and the safety that need not consider this network to whether need safe controller to produce personnel to ensure, manufacturer people under the pressure that is in safe problem all the time. In the past, this means need to install appropriative safety network normally. Although this kind of traditional safe network protected a worker really, also brought however a lot of " additional work " -- laid cable, safeguard, groom and because engineers need to be in,safe control undertakes harmony between two automation system, caused a lot of troubles consequently. Now, these circumstances had had complete change. This will be attributed to general industry agreement -- CIPTM, one kind applies at factory workshop network, be like the fundamental agreement standard of DeviceNetTM, ControlNetTM and EtherNet/IPTM. Have the expansion of safety performance to CIP agreement, offerred CIP SafetyTM agreement, it will make the standard of a safety net sth resembling a net of IEC international Electrotechnical Committee. Safety net sth resembling a net introduces safety net sth resembling a net is bus line of a kind of spot, with the equipment in join factory workshop. Include convenient and the onefold cable that join easily and disassembles, compositive facility, allow communication, configuration undertakes between equipment, release diagnostic data and other property state, will help a worker maintain safe system effectively. But, differ with standard network, the design of safety net sth resembling a net is not a needle to restrict the mistake inside to tolerating at be being used, achieve specific restriction in the mistake even when, undertake detecting and make response, go to equipment switch booked safe condition. Enterprise to save wiring, go to the lavatory to install equipment and choose safety net sth resembling a net, perhaps can offer a network to diagnose information, will promote the property of production process, with this complete play gives their advantage. For example, when the mistake appears, system of hard wiring security will make answer, shut all can make up Cheng controller (PLC) output, be equal to actually shut whole application system. No matter produce what problem, systematic response is identical. Although means of this kind of processing avoided the happening of hazardous condition, but caused loss however actually. Once whole application system is shut, should let it is started again and move so not simple -- the loss of time and the sources of energy will cause significant gain loss, and the commitment that violates pair of clients likely. On the other hand, if use the system that contains a network, so safe controller needs to be shut to what system, what system needs to continue to move, can make accurate decision. For example, if a deviate is normal,safe sensor of direction affected the manipulator arm in an unit, need to close that specific unit only so. When occurrence safety problem, do not need to shut whole area whole perhaps equipment, improve productivity thereby. The key of this kind of function serves as safeguard with respect to the diagnostic function that takes in Yu Youxian, and diagnostic function design is in controller, network and I/O equipment, and can make response firmware and application software to these diagnosis inside. This agreement acceded the characteristic of safety net sth resembling a net, can ensure to there is very advanced and other integrality in applying, include message redundant, across checks, ensure safe information can be in book time inside, reliable ground transmits another equipment from an equipment, can assure the integrality of data content. Redefine standard IEC 61508 -- but the standard of functional sex safety in process designing electrical system -- defined the function of safety net sth resembling a net. This level that constitutes by 7 parts defined the demand of safe system, make its abide by corresponding safe integrality grade (SIL) . According to the point of view that offers recently, IEC 61508 defined the way that safe system evaluates, from the means that is based on predicting means changeover to direct to be with the purpose. This kind of change allowed advanced safety to control systematic development from the angle of the instrument, below the situation that uses safety net sth resembling a net to regard hard wiring as substitute in more especially. Before IEC 61508, the businessman should prove their parts of an apparatus and solution and diamonds image are consistent, need searchs evaluate personnel to finish. Now, user and businessman undertake the risk is evaluated together will examine potential unsuccessful possibility, record causal the probability that appears with incident. This kind of analysis decided the SIL level that protection system place must reach, it also defined what what ask to be able to allow unsuccessful possibility most conversely. Safe agreement of new structural unit CIP is to be on CIP agreement foundation of the standard, add redundant data, mistake for safe information desired result and be based on time time to indicate. These functional implementation can be only in the past in terminal unit the information that adds code and hardware ability to achieve transmits integrality. Because integrality can come true in terminal unit, so bridge of intermediate medium net perhaps joins equipment can be standard equipment. Safety net sth resembling a net can realize advanced and other integrality. This kind of integrality is to be on the design, make equipment is when communication occurrence mistake, enter booked safe state. The safe condition of different equipment is different. Additional, safety net sth resembling a net must have determinism to assure to undertake transmission inside the time that information can be in all safety to book or can predict. Safety net sth resembling a net allows an user to have set to every equipment, the response that makes its have oneself is periodic. Because had this function, the transmission that safety can carry message is finished inside formulary time. Safe information includes sign of a time, use at passing to undertake checking to its, ensure information arrives inside formulary time. If the arrival of safe information exceeds formulary time, can bring about the relevant equipment that is affected to enter safe state. The equipment in safety net sth resembling a net uses double processor to design commonly, with alternate desired result has when arrive. Because data is to load redundantly to network agreement interior, accordingly double processor will get information and across checks another result will ensure accuracy. Besides these structural unit, still have a lot of characteristics OK and divisional safe network. What should stress here is DeviceNet SafetyTM, it provided a kind of most effective means to shut safe return, and regard CIP as the one part of the framework, offerred multichannel to link the good point of the framework. DeviceNet SafetyDeviceNet Safety, it is patulous to the security of DeviceNet, it by association of supplier of open equipment net (ODVA) make. This kind expands make safety OK as concomitant on same DeviceNet network as standard control equipment. This is meant, safe sensor can work by transducer, safe controller is OK PLC, as adjacent as the standard switch has communication. DeviceNet has a lot of functions, make its can apply ideally at safe system. These functions include: The medium with good · , had passed a test below senior officer faze and other and harsh environment; · undertakes be checkinged automatically to repeating node address; Of layer of · data link inside place tries a function again; The attributive set that · can configure; Tally of mistake of every connective in · network; · is based on connective information to convey, so generator and consumer can recognize whether does data fail. In the meantime, standard DeviceNetTM medium and develop attack the structure makes any altering do not need when be being used at safety application. Accordingly, deviceNetTM user can continue to use existing wiring to come compose builds safe system, need to add DeviceNetTM safety in existing network only. In fact, final user will be OK control of compositive on same network standard and safe control. DeviceNetTM safe agreement ensured standard equipment won't disturb safety, and safety also won't constitute interference to standard equipment. To other for a lot of safe agreements, manufacturer must use an independent network to have safe control, increased for the system needless complex degree. And, separate network cannot become a standard closely to control systematic framework thick and fast in, this will bring about the mistake that the system cannot differ to every kinds to make different response. When handling many networks, it consider safe return how to be shut is very important to consider safe return how to be shut. Have two kinds of methods that shut return circuit between I/O equipment. The first kind is the method that is a center with controller, this kind of method asks all safe return pass a safe PLC; The 2nd kind is the method of controller of safety net sth resembling a net, this kind of method does not need to use safe PLC to regard safety as the one part of loop. The 2nd kind of method can is by end a kind of groovy relay replaces a method, often close strictly with Yu Fei commonly loop. Two kinds of methods have respective advantage, and not mutual repulsion, it is OK that this means manufacturer union uses these two kinds of methods. Because CIP is safe the agreement is standard CIP agreement is patulous, it acceded the bridge of EtherNet/IPTM, ControlNetTM and praise highly of DeviceNetTM user place is received and road by the function. Accordingly, from the point of the angle of limits of a factory, user of DeviceNetTM safety net sth resembling a net will achieve earnings from inside a variety of link frameworks. Duan Ke of many DeviceNetTM safety net joins each other with using network of main force of high speed EtherNet/IPTM, all node can resemble be in same network paragraph like going up, undertake notting have seaming communication. In the meantime, the engineer is OK still DeviceNetTM safety solution fractionation becomes different network, undertake configuration to every network, when making its offer wants accurate ring to answer. In the meantime, send the message that is requested to other network only, optimize network bandwidth thereby. Besides, the much loop character of DeviceNetTM and safe controller are right also ensure function provided a help. Accordingly, the independence that OEM manufacturer can design separate facility and themselves child net, the safe return that assures every equipment can have a visit, and won't get the negative effect of other machine. From the point of the footing of OEM manufacturer, need ensures function is responsible to its. To compositive, IEC 61508 asks to use following one of two kinds of methods: The physics that has safe control and standard control function is detached, perhaps depart logically. DeviceNet safe agreement supports these two kinds of methods, but if want to achieve optimal result, need undertakes logistic depart. Logistic depart ensured the safety of the operation, can than using physics to depart more the opportunity improves manufacturing efficiency. An alone controller platform can be used at undertaking logistic depart compulsively, it will simplify the configuration of safe system, will decrease groom. In the meantime, the system that it wants safeguards professional knowledge fewer, enhanced the security of whole system thereby. The additional flexibility that place of DeviceNet TM safe agreement provides raised systematic configuration, test and debugged rate, reduced whole to have cost. The user of DeviceNetTM had experienced a lot of gain, these advantage include: Decrease most the hard wiring of 80% , the time that needs installation reduces a few hours from a few days of acute, the breakdown that decreased to start level place to need significantly is diagnosed. In the meantime, equipment, workshop uses very useful diagnostic function to will make manufacturing efficiency rises considerably. The Allen-Bradley of automation of Er of functional Luoke Wei of compositive standard controller and safe controller? New is the GuardLogixTM controller that roll out in standard ControlLogix? Safe function increased on processor, reach safe integrality order and degree thereby (SIL) 3/Cat 4 safety is controlled. Because used double processor framework (1oo2) , it used a security advocate processor and a safety from processor, be controlled in safety of the implementation on a platform thereby and standard pilot is compositive. Like controller of automation of Er of other Luoke Wei, use identical Logix to control engine, network and input / output (I/O) module, guardLogix offerred faster execution to manufacture efficiency and simpler function speed, higher, use at satisfying current and advanced safe pilot to ask. GuardLogix uses software of RSLogixTM 5000 process designing, with all Logix but controller of process designing automation (PAC) adoption development tool is identical. If existing Logix user has understood its system very much, can reduce groomed cost so, make process designing and debug more quick. New user will experience the flexibility advantage that is based on label to find location way, personnel uses real name and this system allows process designing is not physical address. In the development phase of GuardLogix system, the government that controls to bringing fully control and standard control are identical. And, as a result of OK and online editor, to the user, develop and debug an environment to become more simple. Once the function passes a test, had gotten ready undertake admitting really finally, the user can be secure job setting SIL 3. This is finished compulsively by GuardLogix controller subsequently. Safe memory is in surely by the lock SIL 3 condition, logic will be protected, but the standard control of GuardLogix will continue to move partly, as groovy Logix controller same. Safe memory can carry standard logic and peripheral equipment, if man-machine interface and other controller come,read take. The user does not need to install or adjust safe data on a complex safety, because this saved time. GuardLogix controller produced general industry agreement (the advantage of CIP) SafetyTM. Be for the join sex of safe I/O on DeviceNetTM, and be for the lock of safe each other between GuardLogix processor on EtherNet/IPTM. Make so many different unit / the GuardLogix controller of area shares safe each other to lock up data. CNC Milling