Foundation Fieldbus Control in the Field (CIF)

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1 Foundation Fieldbus Control in the Field (CIF) Name : Harendra G. Mistry Job Title : Chief Engineer Company : Tecnimont ICB FFIC : Automation 2011 Mumbai

2 Foundation Fieldbus Technology Benefits Benefits of Foundation Fieldbus Technology are.. Standard design concept Interoperability Reduction in space requirements Reduction in power consumption & heat load Reduction in faults Ease of trouble-shooting for sensors & actuators Ease of configuration, upgradation & addition of devices Reduction for Installation cost, Installation material Saving in time for calibration & loop checking Reduction in operational and maintenance cost Control in the Field

3 Control in the Field (CIF) Benefits of CIF are.. Improved Control loop performance Reduced loading on network and controller Provide Single loop integrity Increased reliability and availability Key to optimised control Advanced diagnostics at function block link Handshaking between FF function blocks

4 Location of Control DCS with AMS Fieldbus Host Controller AI AI AO H1 Fieldbus. Power T supply AMS System I/O card Marshalling + HART Interface AI AI AO 4-20 ma + HART

5 Control In Valve Positioner _D BKCAL_IN BKCAL_ CAS_IN AI AO BKCAL_ FF_VAL IN TRK_IN_D CAS_IN AI 1 AO TRK_VAL TRANSMITTER VALVE POSITIONER H1 TRUNK JUNCTION BOX SPUR FLOW TRANSMITTER FT POSITIONER FV

Control In Valve Positioner Start Time Offset (msec) 0 21 51 171 Scheduled function block execution (AI), 20 ms run time Scheduled Communication (CD), 30 ms

6 Control In Valve Positioner Start Time Offset (msec) Scheduled function block execution (AI), 20 ms run time Scheduled Communication (CD), 30 ms run time Scheduled function block execution (), 120 ms run time Scheduled function block execution (AO), 70 ms run time Total close loop execution time ~ 240 msec

7 Control In Transmitter 2 _D BKCAL_IN BKCAL_ CAS_IN AI AO BKCAL_ FF_VAL IN CAS_IN TRK_IN_D AI 1 AO TRK_VAL TRANSMITTER VALVE POSITIONER H1 TRUNK JUNCTION BOX SPUR FLOW TRANSMITTER FT POSITIONER FV

8 Control In Transmitter Start Time Offset (msec) Scheduled function block execution (AI), 20 ms run time Scheduled function block execution (), 120 ms run time Scheduled Communication (CD), 30 ms run time Scheduled function block execution (AO), 70 ms run time Scheduled Communication (CD), 30 ms run time Total close loop execution time ~ 270 msec

9 Control In Host 3 _D BKCAL_IN BKCAL_ CAS_IN AI AO BKCAL_ FF_VAL IN CAS_IN TRK_IN_D AI 1 2 AO TRK_VAL TRANSMITTER DCS CONTROLLER VALVE POSITIONER H1 TRUNK JUNCTION BOX SPUR FLOW TRANSMITTER FT POSITIONER FV

10 Control in Host Start Time Offset (msec) Scheduled function block execution (AI), 20 ms run time Scheduled Communication (CD), 30 ms run time Scheduled function block execution (), 120 ms run time Scheduled Communication (CD), 30 ms run time Scheduled function block execution (AO), 70 ms run time Scheduled Communication (CD), 30 ms run time Total close loop execution time ~ 300 msec

11 Single Loop Integrity Host Link Master + H1 LAS Backup. Power supply T Backup LAS

12 System Reliability Control in DCS Transmitter Valve Cable Fieldbus Power supply H1 card Back plane Controller Controller power supply Control in the Field Transmitter Valve Cable Fieldbus Power supply MTBF = X MTBF = 1.833X

13 System Availability Redundant hardware LAS backup in H1 cards and Field device Overall reduction in network traffic and macro cycle time Signal propagation between function block with status Handshaking feature of FF function blocks

14 FF Function Blocks FF standard specifies many different function blocks for the AI Analog Input construction of control algorithms. BASIC function blocks ADVANCE function blocks DEVICE SPECIFIC Function block AO Analog Output B Bias CS Control Selector DI Discrete Input DO Discrete Output ML Manual Loader PD Proportional/Derivative control Proportional/Integral/Derivative control RA Ratio _D BKCAL_IN CAS_IN Resource block Transducer block AI AO BKCAL_ FF_VAL IN TRK_IN_D BKCAL_ CAS_IN Pulse Input Complex Analog Output Complex Discrete Output Step Output Device Control Set point Ramp Splitter Input Selector Signal Characterizer Dead Time Calculate Lead/Lag Arithmetic Integrator Timer Analog Alarm Discrete Alarm Analog Human Interface Discrete Human Interface Multiple Analog Input Multiple Analog Output Multiple Digital Input MultipleDigital Output Flexible Function Block TRK_VAL

15 FF Signal Status and Function Block Mode Status associated with FF signal passed between Function blocks Good Bad Uncertain Function block modes OOS (Out of Service) Man (Manual) Auto (Automatic) Cas (Cascade) Iman (Initialisation Manual) LO (Local override) RCas (Remote Cascade) ROut (Remote Output)

16 FF Function Block Status and Mode BKCAL_IN AI _D CAS_IN FF_VAL IN BKCAL_ CAS_IN AO BKCAL_ TRK_IN_D TRK_VAL Engineering unit value + Status Where Status indicates Quality = Good, Uncertain, Bad Sub Status = Bad sensor, Alarm etc Limit Constant, low, High

17 Field Device requirements Device certified for latest interoperability testing Device approved by the Fieldbus Foundation and carry the Foundation fieldbus Check Mark logo. Device Description (DD) and Common File Format (CFF) files available. Device have link master capabilities. Device have required function block (AI,, AO etc) and execution time. Device minimum operating voltage, current and power consumption. Device should be polarity insensitive. FF device and its function blocks shall be tested and certified by the DCS vendor VCR (Publisher/Subscriber) capacity Function blocks shall be downloadable into the devices by the system.

Device used in hazardous area should have Sa

18 Field Device requirements Capable of performing continuous advanced diagnostics, self-test function, provide specific diagnostic information, on-line automation procedures (e.g.calibration) from the DCS, support peer to peer communication Device certified for plant hazardous area. Device used in hazardous area should have Safety Parameter of Safety Parameter of I.S. Barrier Device Uo [V] <= Ui [V] Io [ma] <= Ii [ma] Po [mw] <= Pi [mw] Lo [mh] >= Li[mH] + Lcable[mH] Co [nf] >= Ci[nF] + Ccable [mh]

19 CIF Engineering Guideline Analyse all possible risk at the beginning All device of control loop remain on same segment Control macro cycle (Scheduled and Unscheduled) communication Identify loop type to be configured with CIF Simplify distribution/location of function block Standardisation of function blocks According to loop execution in field, purchase devices with suitable function block Plan maximum number of devices allowed on segment using CIF VCR (Publisher/Subscriber) optimisation Plan location of LAS infield device Plan for redundancy at required level

20 Thank You Fieldbus Foundation India Committee 21 st September, FFIC : Automation 2011 Mumbai

Control in Field. 15 th December, NSE Complex, Goregaon /V42/Bgo Control in the Field 1

Control in Field. 15 th December, NSE Complex, Goregaon /V42/Bgo Control in the Field 1 Single Control Loops with Control in the Field FFIC Conference Control in Field 15 th December, 2010 Industrial Automation ti India 2010 NSE Complex, Goregaon Mumbai (India) Samson 2010-11-25/V42/Bgo Control