C4 DCS Architecture

8/3/2019 C4 DCS Architecture

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Chng 4: Kin trc DCS


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Chng 4: Kin trc DCS 2005 - HMS

Chng 4: Kin trc DCS

4.1 Gii thiu chung

Phm vi ng dng

4.2 Cu hnh c bn ca cc h DCS

Gii thiu cc thnh phn chnh

Cc v d sn phm minh ha4.3 Cc im mu cht trong kin trc DCS

4.4 So snh kin trc PLC/HIM vi DCS


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4.1 Gii thiu chungv DCS DCS = Distributed Control System

Tin ha t gii php DDC, phn tn chc nng iu khinxung nhiu b iu khin ni mng

H iu khin tch hp trn vn ca mt nh sn xut (tchhp v phn cng, phn mm v chc nng)

H DCS u tin: TDC2000 ca Honeywell (1975)

Cc sn phm tiu biu: ABB: Advant OCS, IndustrialIT

Emerson (Fisher-Rosemount): PROVOX, DeltaV

Honeywell: PlantScape Invensys (Foxboro): I/A Series

Siemens: Teleperm, PCS7

Yokogawa: Centum CS1000/CS3000


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Phm vi ng dng ca DCS Ch yu trong cng nghip ch bin:

Ha cht, ha du, thc phm, m phm, dc phm Khai thc du kh, than

in nng, xi mng, giy Luyn kim, cn thp ...

u im: Tnh tch hp cao (phn mm, phn cng, giao tip, chc

nng iu khin v gim st) Pht trin ng dng trc quan, linh hot, n gin, gn gi

vi cng ngh tin cy cao nh kh nng c lp cnh gii, chn on li

ca cc tr m, cu trc phn tn v cu hnh d phng

Nhc im:

Gi thnh h thng tng i cao Nhiu h thng th hin tnh ng kn


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4.2 Cuhnhcbn mt h DCS

PROCESS

System bus/

Control Network

LAN

Local Control

Unit (LCU)

OS OS ESOperator

Station

Engineering

Station

Remote I/O

(RIO)4-20mA Fieldbus

Alarm

Printer

Report

Printer


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Cc thnh phn chnh Khi iu khin cc b (LCU), b iu khin: Chc

nng iu khin c s v gim st (ch yu cho ccbin tng t), c th c iu khin cao cp

Vo/ra t xa (RIO), vo/ra phn tn Trm vn hnh: Chc nng giao din vn hnh & gim

st, qun l d liu

Trm k thut: Pht trin phn mm, cu hnh v chnon h thng

Bus h thng (system bus, data highway), bus iukhin

Ty chn: Cc loi trm ch, cc my tnh iu khincao cp, cc loi bus trng, bus thit b (FoundationFieldbus, DP, DeviceNet...)


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V d: DeltaV(Fisher-Rosermount)

Engineering

Workstation

Operator

Workstation

Application

Server

Operator

Workstation

DeltaV

Controllers

Fast Ethernet


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V d: PlantScape (Honeywell)


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V d: Centum CS3000 (Yokogawa)

Remote

I/O Nodes

Local

I/O Nodes

HIS EWS

Historian/PerformancePlant Ethernet

FCS

Vnet

EWS: Engineering WorkstationHIS: Human Interface Station


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V d: PCS7 (Siemens)


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V d: ProcessLogix(Allen-Bradley)


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B iu khin (Controller, LCU)

Cu trc module: Gi , thanh ray Khi cung cp ngun (PS)

Khi x l trung tm (CPU) Cc module vo/ra (thng thng, HART, an ton chy n) Giao din vi bus h thng, bus iu khin Giao din vi bus trng (ty chn)

Kin trc my tnh: My tnh c chng, ch iu khin lin tc-> DCS truyn thng PLC -> PLC-based DCS

PC/IPC -> PC-based DCS

Cc b iu khin lai

CPUPS CPUCPUPS CPU IM AI AO DI DO IMPS CPU IM AI AO DI DO IM

Khng d phng C d phng


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DeltaV

Controller

PCS 7

Controller


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Cc chc nng ca b iu khin X l v gim st cc gi tr vo/ra:

Chuyn i D/A, A/D, lc nhiu, chuyn thang

Gim st ngng gi tr, to cc thng bo bo ng

Lu tr tm thi cc gi tr vo/ra Hn ch tn hiu ra, t cc tn hiu r a v trng thi an ton

trong trng hp c s c

iu khin: iu chnh t ng:iu khin PID, iu khin tl, iukhin tng, iu khin m

iu khin trnh t, iu khin kha lin ng

iu khin cao cp:iu khin MPC, iu khin theo cngthc, iu khin thch nghi

T chn on

X l truyn thng


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Cc tnh nng quan trng ca b iu khin

Tnh nng thi gian thc Hiu nng CPU, dung lng b nh X l a nhim, h tr ca h iu hnh TGT Thi gian chuyn i tng t-s

Chu k task (ti thiu 100ms) Kh nng ghp ni vo/ra

Cc loi tn hiu vo/ra Vo/ra phn tn

Ghp ni thit b HART, ghp ni bus trng Lp trnh thun tin, cho php s dng cc thut ton cao cp

Ngn ng theo chun quc t IEC 61131-3 Kh nng iu khin lai (lin tc, trnh t v logic)

Th vin khi chc nng mnh tin cy v tnh sn sng

Kh nng t chn on, t kim tra v sa li C ch d phng nng Thi gian chuyn mch khi c s c


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Trm vn hnh (Operator Station)

Cu hnh tiu biu: My tnh tr m (Workstation) hoc my tnh c nhn (PC) H iu hnh Windows NT/2000/XP hoc UNIX, LINUX

Mn hnh CRT 21", c th mn hnh kp


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Cc chc nng ca trm vn hnh Hin th:

Cc hnh nh chun: hnh nh tng quan, hnh nh nhm, hnh nhtng mch vng, hnh nh iu khin trnh t

Cc hnh nh ha t do: lu cng ngh, cc phm iu khin

Cc th thi gian thc v th qu kh H tr vn hnh:

Cc cng c thao tc tiu biu, x l mnh lnh H thng hng dn ch o

Hng dn tr gip Bo tr h thng

Qun l d liu qu trnh X l, lu tr

Phc v truy vn X l cc s kin, s c

Gi thng bo, yu cu xc nhn Bng hin th tm tt, bng hin th chi tit

H tr lp bo co t ng


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Cutrcbtr cc trm vn hnh

Controller

OSOS OS

SYSTEM BUS

Controller Controller

Cu trc phng

Cu trc phn cp

OSOS OS

TERMINAL BUS

SYSTEM BUS

DATASERVER

Controller Controller Controller


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Trm k thut (Engineering Station) Cu hnh:

My tnh c nhn (WinNT/2000/XP) hoc my tnh trm(UNIX,LINUX), mn hnh CRT 19"

Thng c th s dng l tr m vn hnh C c ch kha kim sot quyn s dng

Cc chc nng tiu biu:

t cu hnh h thng, lu tr v qun l d liu cu hnh hthng

Tham s ha, a cc thit b trng vo vn hnh

Lp trnh iu khin (LD, FBD/CFC, SFC, C/C++/BASIC,...)

Th nghim v g ri chng trnh

To giao din ngi-my v cc chc nng iu khin gimst khc

Quan st v chn on li h thng


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V d btr phng iu khin trung tm


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Bus h thng Chc nng:

Ni mng cc b iu khin vi cc tr m vn hnh/trm k thut

Ni mng cc b iu khin vi nhau (bus iu khin)

c im k thut: Mng tc cao (10-100MBit/s)

Yu cu tnh nng thi gian thc, c bit vi bus iu khin

tin cy cao, thng c d phng 1-1 Cc loi mng cng nghip thng c s dng:

Ethernet v Industrial Ethernet (s dng Switches/Hub)

Profibus-FMS ControlNet

Data Highway

Mng c chng ca ring hng sn xut


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Bus trng

Chc nng: Ghp ni trm iu khin vi cc tr m vo/ra phn tn

Ghp ni trm iu khin trc tip vi cc thit b trngthng minh

c im k thut: Mng tc thp hoc va phi (< 10Mbit/s)

Yu cu tnh nng thi gian thc cao

tin cy cao, c bit trong mi trng d chy n

Cc loi bus thng c s dng: Profibus-DP, Profibus-PA

Foundation Fieldbus H1

Controlnet

DeviceNet

Mng c chng ca ring hng sn xut, s dng RS-485


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4.3 Cc im mu cht ca kin trc DCS

Tch hp ton din v phn cng: B iu khin, I/O,ES, OS

Tch hp ton din v phn mm Cc phn mm chy

Mi tr ng pht trin tch hp (IDE), xuyn sut

C s d liu cu hnh chung

C s d liu qu trnh chung

Tch hp ton din v truyn thng C s h tng truyn thng

Giao tip ngm (khng cn cu hnh, lp trnh ring)

Tch hp ton din v chc nng iu khin c s, iu khin cao cp

Vn hnh & gim st,...

CS


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Kin trc DCS "truyn thng"

Kin trc "ng kn" H tr t cc chun cng nghip

Phng php lp trnh ring

Kh tch hp sn phm hng th 3 (phn cng, phn mm)

B iu khin: Chuyn dng, c chng

Ch iu khin cc qu trnh lin tc hoc theo m Giao din qu trnh:

4-20mA, HART

Vo/ra tp trung hoc t xa, khng dng bus chun ha Phn tn cha trit (chc nng iu khin vn ch

nm cc b iu khin)

Ki DCS hi i


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Kin trc DCS hin i

Kin trc m: H tr nhiu cc chun giao tip cng nghip (COM, OPC,

Ethernet, ODBC, ActiveX, MMS, XML)

Phng php lp trnh theo chun IEC 61131-3

C th tch hp sn phm hng th 3 (PLC, I/O, bin tn, MES,ERP,..)

B iu khin: a dng

Kh nng iu khin lai

Giao din qu trnh: 4-20mA, HART

Vo/ra tp trung hoc t xa qua bus chun ha

Ghp ni trc tip vi cc thit b bus trng

Chc nng iu khin: c th a xung cp trng


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DCS h PLC/HMI?


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DCS hay PLC/HMI?

u t ban u: DCS PLC/HMI

Mc tch hp: DCS PLC/HMI

Cng c pht trin: DCS PLC/HMI tin cy, sn sng: DCS PLC/HMI

Qui m ng dng ln: DCS PLC/HMI

Qu trnh lin tc: DCS PLC/HMI

Qu trnh ri rc: DCS PLC/HMI

Qu trnh hn hp: DCS + PLChoc h lai

C4 DCS Architecture

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