Foundation Fieldbus Technology20141225

1、中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Foundation Field Technology Presenter: Ren Zhiyong Mar 18, 2005 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Historical development In 1992 an international group, the ISP Interoperable Systems Project

2、, was founded.(Siemens,fisherRosement,ABB,Fo xboro,Yokogawa) At the same time, the manufacturers and users established the international user organization WorldFIP. (Honeywell,Bailey) 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Historical development In 1994, for technica

3、l, economic and political reasons, the ISP and the WorldFIP merged to form the Fieldbus FOUNDATION. The aim of the Fieldbus FOUNDATION was and is to create a single, international fieldbus standard for hazardous environments which will find widespread use as IEC standardized fieldbus. 中海壳牌石油化工有限公司中海

4、壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Foundation Fieldbus Technical Features FOUNDATION fieldbus is an all digital, serial, two-way communication system that interconnects devices in the field such as sensors, actuators, and controllers. FOUNDATION fieldbus is a local area networ

5、k (LAN) for instruments, with built-in capability to distribute a control application across the network. Not only be one bus but also one system. Is one network system, also one automation system. 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Foundation Fieldbus Technical

6、Features Can distribute control function at intelligent field devices. Can provide more information about process and field devices. Field device is a network node. 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Foundation Fieldbus Communication Model The FOUNDATION fieldbus

7、 layered communications model is based on the ISO/OSI reference model and consists of three major functional elements : Physical Layer Communication “Stack” User Application 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Foundation Fieldbus Communication Model 中海壳牌石油化工有限公司中海

8、壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Foundation Fieldbus Communication Model The physical layer is OSI layer 1. The data link layer (DLL) is OSI layer 2. The fieldbus message specification (FMS) is OSI layer 7. The communication stack is comprised of layers 2 and 7 in the OSI mo

9、del. The fieldbus protocol does not use OSI layers 3, 4, 5, and 6. 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Physical Layer- H1 Fieldbus 2-32 Nodes / segment Up to 1900m length 31.25 kbps Intrinsic Safety Loop powered Standard Twisted Pair cable (even existing) Vendor I

10、ndependent 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Foundation Fieldbus Terminology Spurs cable Trunk cable ALF111 terminator terminator Segment 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Topologies Bus Tree (Chicken-foot) Daisy-chain Point

11、-to-point Combinations of 2 or more topologies is possible 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Topologies Daisy-ChainBus with SpursPoint-to-Point Control Network Junction Box Chicken Foot or Tree 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limi

12、ted Physical layer Transmission medium Twisted pair; optical fiber; wireless The main run cannot exceed a total length of 1900 m (6,232 ft) with shielded twisted pair cable. The cable length is determined by adding together the length of the trunk cable and all of the spur lengths. 中海壳牌石油化工有限公司中海壳牌石

13、油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Physical layer - cable 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Power and signal Bus supply voltage 9 32 VDC Signal voltage 0.75-1V peak to peak Transmission speed rate 31.25kbit/s signals are encoded using the Man

14、chester Biphase-L technique. 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Power and signal 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Power and signal If an ordinary power supply were to be used to power the fieldbus, the power supply would abs

15、orb the signal on the cable because it would try to maintain a constant voltage level on the cable. For this reason, an ordinary power supply has to be conditioned for fieldbus. This is done by putting an inductor between the power supply For instance, if a subscriber requests measuring or positioni

16、ng data from a device. 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Virtual Communication Relationships The client/server VCR type is used for unscheduled, user initiated communication based on the PT command. If a device (client) requests data from another device, the req

17、uested device (server) only responds when it receives a PT from the LAS. The client/server communication is the basis for operator initiated requests, such as set point changes, tuning parameter access and change, diagnosis, device upload and download, etc. 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell P

18、etrochemicals Company Limited Virtual Communication Relationships Report distribution communication is used to send alarm or other event notifications to the operator consoles or similar devices. Data transmission is unscheduled when the device receives the PT command together with the report (trend

19、 or event notification). Fieldbus devices that are configured to receive the data await and read this data. 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Technology Overview Client/Server 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited 中海壳牌石油化工有限公司中海

20、壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Technology Overview Publisher/Subscriber 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Technology Overview Event Notification 中海壳牌石油化工有限公司中海壳牌石油

21、化工有限公司 CNOOC and Shell Petrochemicals Company Limited 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited HIS Server For CS3000 Builder Display Schedule Display Schedule 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Schedule 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOO

22、C and Shell Petrochemicals Company Limited Schedule of One PID Application 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Schedule of One PID Application 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Schedule of One PID Application AI AOPID transmit

23、ter actuator communication Block link over communication Internal block link Block execution Schedule communicationFor other communications 中海壳牌石油化工有限公司中海壳牌石油化工有限公司 CNOOC and Shell Petrochemicals Company Limited Communication function System Management Agent Function block Transducer block Fieldbus Fieldbus Instruments Resource block Measurement Circuit Block database Execution environment for function block Setting for devices tag and address Time synchronization Execution control of function block Hardware information Setting of measurement and control Communication connection