ISAS52中文版(很好)

1、ISAS52中文版（很好）A分析5 17報(bào)警B燒嘴、火焰供選用 1供選用1供選用1C電導(dǎo)率控制12D密度差4E電壓（電動(dòng)勢）檢測元件F流量比（分?jǐn)?shù)）4G供選用1視鏡；觀察 9H手動(dòng)高14 15I電流指示10J功率掃描K時(shí)間、時(shí)間程序變化速率4 19操作器20L物位燈11低14 15M水分或濕度瞬動(dòng) 4中、中間14N供選用1供選用1供選用1供選用1O供選用1節(jié)流孔P壓力、真空連接點(diǎn)、測試點(diǎn)Q數(shù)量積算、累計(jì)4R核輻射記錄16S速度、頻率安全 開關(guān)12、聯(lián)鎖T溫度傳送U多變量6多功能7多功能 7多功能 7V振動(dòng)、機(jī)械監(jiān)視17閥、風(fēng)門、 百葉窗12W重量、力套管X未分類2 X軸未分類2未分類2未分類2

2、Y事件、狀態(tài)18 Y軸繼動(dòng)器、計(jì)算器、轉(zhuǎn)換器 12 13Z位置、尺寸 Z軸驅(qū)動(dòng)器、執(zhí)行機(jī)構(gòu)未分類的最終執(zhí)行元件CONTENTS簡介符號表示4開/關(guān)邏輯輸入符號5模擬輸入符號5.1 變送器5.2 溫度測量6邏輯數(shù)據(jù)處理模塊6.1 ET邏輯數(shù)據(jù)模塊6.2 OU邏輯數(shù)據(jù)模塊6.3 XOR邏輯數(shù)據(jù)模塊6.4 延時(shí) DI6.5 延時(shí) DT6.6 PO脈沖輸出6.7 寄存器6.8 計(jì)時(shí)器7數(shù)字?jǐn)?shù)據(jù)處理模塊7.1 計(jì)算模塊7.2 控制模塊7.3 臨界點(diǎn)模塊7.4 復(fù)位模塊7.5 選擇模塊7.6 變量速度限制模塊8顯示模塊8.1 變量顯示模塊8.2 邏輯變量顯示模塊8.3 報(bào)警顯示模塊8.4 變量記錄模塊9操

3、作人員控制模塊9.1 HS控制模塊9.2 HIC控制模塊10直聯(lián)和/或互聯(lián)符號11 開一關(guān)邏輯輸出符號12 模擬輸出符號1簡介這個(gè)符號表示方法是用來明確表示數(shù)字控制系統(tǒng) 的所有處理過程。為了此目的，DCS所有的處理過程被分成多個(gè)基本 功能，一套DCS執(zhí)行的基本操作將完成一個(gè)基本功能 再組成一個(gè)統(tǒng)一單元，例如：流程參數(shù)的獲取，監(jiān)視和核對在工廠的一個(gè)給定點(diǎn)上，流體特性的獲取，監(jiān)視 和核對工廠中設(shè)備的任何一種部機(jī)的停車，監(jiān)視和啟動(dòng) 順序設(shè)備各種部機(jī)組裝的順序處理基本回路一個(gè)識別數(shù)碼被分配到每個(gè)基本功能上， 第一個(gè)數(shù)字 順序數(shù)碼的后兩個(gè)數(shù)字沒有排除。這兩個(gè)數(shù)字在使用上 的某些一致性（按部件重組）。允許

4、標(biāo)識與流程的特殊部分有關(guān)的所有處理過程,作為功能塊 所使用的符號符合ISA標(biāo)準(zhǔn)：ISA S5.1儀表符號和標(biāo)識ISA S5.2過程操作的二進(jìn)制邏輯圖3符號表示這種符號體系包括幾種符號系列：開關(guān)邏輯輸入符號（見第4章） 模擬輸入符號（見第5章）邏輯數(shù)據(jù)處理模塊（見第6章） 數(shù)據(jù)處理模塊（見第7章）顯示模塊（見第8章）操作員控制模塊（見第9章）直聯(lián)和/或互聯(lián)符號（見第10章）開-關(guān)邏輯輸出符號（見第11章）模擬輸出符號（見第12章）4邏輯輸入符號4.1 符號說明 /usyyAXXXXZ /U根據(jù)標(biāo)準(zhǔn)ISA S5.1表1,測量變量的標(biāo)記字母：注意：第一個(gè)字母后面可跟修飾標(biāo)記字母 （例：D表示有差異的

5、）。S開關(guān)的縮寫YY 根據(jù)ISAS5.1標(biāo)準(zhǔn)表1,變換字母XXXXZ 邏輯輸入符號由以下組成：XXXX 該被考慮的邏輯輸入中的 功能號Z如果數(shù)個(gè)邏輯輸入在同一個(gè)功能內(nèi)被考慮，它代表合理的順序字母。4.2 定義當(dāng)處于正常情況時(shí)，輸入為1 （閉合接點(diǎn)）。當(dāng)處 于反常狀態(tài)輸入為0 （斷開接點(diǎn)）。如果過程不允許定義邏輯輸入的正常和反常狀態(tài) （例如：方案選擇器）0和1狀態(tài)的意義將用注解來說 明：DCS外部，使用的邏輯通常是“缺省型”，象上面 描述的那樣。DCS內(nèi)部：使用邏輯的通常是“輸出型”。4.3 例子4.3.1臨界值UUSLL USLUSH USHH> 100%USLLUSLUSHUSHH4.

6、3.2 閥門上的限位開關(guān)Opened ValveClosed ValveZSH-XXXX10ZSL-XXXX014.3.44.3.3 接點(diǎn)Opened ContactorClosed ContactorES01選擇器IO,0 R1工作1 R2工作4.3.5 Push ButtonPush-buttonPressedReleasedHSH10HSL01with a NOT at DCS inputHSL0 -符號說明U字母根據(jù)標(biāo)準(zhǔn)ISA S5.1表，所測變量的標(biāo)記Logic 0De-SelectedLogic 1SelectedThe push button is represented by

7、a selector with a pulse output to reset to 0.PO255模擬輸入符號5.1 變送器UTXXXZ注：此第一個(gè)字母后可跟一個(gè)修飾用標(biāo)記 字母（例如D:有差異的）變送器的縮寫XXXXZ模擬輸入的參照符號由以下組成：XXXX在這個(gè)被考慮的模擬輸入中的功能號如果數(shù)個(gè)模擬輸入在同一功能內(nèi)被考慮，它代表合理的順序字母。5.2 溫度測量 符號說明TEXXXZTC-K溫度縮寫基本元件的縮寫XXXZ 邏輯輸入的參照符號（見5.1）。6邏輯數(shù)據(jù)處理模塊6.1 或邏輯模塊6.1.1 定義AB AND DCI只要輸入端A, B, C至少有一個(gè)處于“1”的狀態(tài)， 輸出端D就處于

8、狀態(tài)1。一旦所有的輸入端A, B, C均處于0狀態(tài)，輸出端D 就處于0狀態(tài)。1 01 01 06.1.2 例子Input AInput BInput COutput D6.2 與邏輯模塊6.2.1 符號表示A 土BAND D一旦輸入端A, B, C均處于狀態(tài)1,輸出端D就處于狀態(tài)1。當(dāng)輸入端A, B, C中至少有一個(gè)處于0狀態(tài)，軍出端D 就處于0狀態(tài)。6.2.2 例子Input AInput BInput COutput D6.3 異-或邏輯模塊6.3.1 定義XOR當(dāng)輸入端僅有一個(gè)處于“ 1 ”狀態(tài)，輸出端C就處 于“1的狀態(tài)。當(dāng)兩個(gè)輸入端均為同一狀態(tài)（0或1）,輸出端C 就處于“0的狀態(tài)。

9、6.3.2 例子Input AInput BOutput C6.4 DI延時(shí) 6.4.1符號說明DINNNTTDI輸出延時(shí)開始的縮寫XXXXZ該功能模塊的參照符號如下：XXXX該模塊中使用的功能號Z在功能XXXX中該模塊的順序字母NNNTT DI延遲時(shí)的持續(xù)時(shí)間顯示，由以下組成:NNN持續(xù)時(shí)間數(shù)字TT持續(xù)時(shí)間的單位DIt輸入端A從0轉(zhuǎn)換到1,在t時(shí)間內(nèi)，它一直保持在 1位置上。當(dāng)延時(shí)時(shí)間t結(jié)束后，輸出端B從0轉(zhuǎn)換到1。輸入端A從1轉(zhuǎn)換到0,輸出端B也立即從1轉(zhuǎn)換到0。6.4.3例子Input AInput Bi010NNTT6.5 DT延時(shí)6.5.1 符號說明DTNNNTT DT輸出延遲終止的

10、縮寫XXXXZ該功能模塊的參照符號如下：XXXX在這個(gè)模塊中使用的該功能號Z 在功能XXXX中，該模塊的順序字 母NNNTT 表示DT延時(shí)時(shí)間，由以下內(nèi)容 組成：NNN持續(xù)時(shí)間數(shù)字TT持續(xù)時(shí)間的單位6.5.2 定義-DT-A t B輸入端A從0轉(zhuǎn)換到1,將會使輸出端B立即從0轉(zhuǎn)換 到1。輸入端A從1轉(zhuǎn)換到0,并在時(shí)間t內(nèi)持續(xù)保持在0狀 態(tài)，當(dāng)時(shí)間t結(jié)束后，輸出端B從1轉(zhuǎn)換到0。6.5.3 例子Input A 1 |I_LII0Output B : n I IL0iIiiInNTTNNTT Iji6.6PO脈沖輸出6.6.1 符號說明PONNNTT PO脈沖輸出縮寫XXXXZ此功能模塊的參照符號

11、，由以下組成：XXXX在這個(gè)模塊中使用的該功能號Z 在功能XXXX中該模塊的順序 字母NNNTT 表示PO脈沖持續(xù)時(shí)間，由以下 組成：NNN持續(xù)時(shí)間數(shù)字TT持續(xù)時(shí)間的單位6.6.2 定義DefinitionPOA t B輸入端A從0轉(zhuǎn)換到1,表明輸出端B也會立即從0轉(zhuǎn) 換到1,在脈沖時(shí)間內(nèi)，輸出端B將保持在1,在最初轉(zhuǎn)換后，不管輸入端A如何變化，當(dāng)脈沖時(shí)間t結(jié)束后，輸出端B從1變到0。（特別是輸入端A的任何一個(gè)從0轉(zhuǎn)換到1的新變化，而輸出端B只處在“1狀態(tài)。）6.6.3 例子SALATCHC?BCInput A0_|1八一1Output B0_1JNNTTInnttnnttI6.7 寄存器6.

12、7.1 符號說明A B S LATCH ?CCS 設(shè)置的縮寫R復(fù)位的縮寫XXXXZ 該功能模塊的參照符號，由以下組成:XXXX在這個(gè)模塊中使用的該功能號6.7.2Z 在功能XXXX中，該模塊的順序字母定義下列情況一發(fā)生輸出端C就從0轉(zhuǎn)換到1:輸入端B處于0狀態(tài)，輸入端A從0變?yōu)?輸入端A處于1狀態(tài)，輸入端B從1變0 。只要輸入端B保留在0狀態(tài)，輸出端C的1狀態(tài)不受 輸入端A狀態(tài)變化的影響。輸出端C從1轉(zhuǎn)換到0,只要:不管輸出端A的狀態(tài)是什么，輸入端B從0轉(zhuǎn)到1只要輸入端B處于狀態(tài)1,不管輸入端A怎樣變化, 輸出端C的“0狀態(tài)將保持（復(fù)位以前）。只要輸入端A處于0狀態(tài)，輸出端C的“0狀態(tài)將不 會

13、受輸入端B的變化影響。6.7.3 例子Input AInput B八一1Output C0注意:優(yōu)先權(quán)通常是復(fù)位65bn給設(shè)置（S）以優(yōu)先權(quán)也是可能的，在這種情況下，當(dāng)輸入端S置1,無論輸入端B是什么狀態(tài)，輸出端C將始終處于狀態(tài)1。6.8 計(jì)時(shí)器6.8.1 符號說明 STimer TTS設(shè)置縮寫R復(fù)位縮寫XXXXZ該功能模塊的參照符號，由以下組成:XXXX在該模塊中使用的功能號Z 在功能XXXX ,該模塊的順序字母TT 時(shí)間累計(jì)器的時(shí)間單位6.8.2 定義STIMER6.8.3 例子Input AInput BOutput C計(jì)時(shí)器的功能是累計(jì)輸入端A處在狀態(tài)1的時(shí)間（在此時(shí)，輸入端B處于0狀

14、態(tài)），從輸入端B最近 的一次從1轉(zhuǎn)換到0狀態(tài)算起。輸入端B為0,輸入端A為1,意味著加法器的遞增 是從設(shè)置實(shí)體的0狀態(tài)起。輸入端B轉(zhuǎn)換到1意味累加器的復(fù)位（C = 0）,不 管輸入端A是什么狀態(tài)，只要輸入端B處在狀態(tài)1, 參數(shù)C就處于0。然后累計(jì)時(shí)間值被用于：顯示建立一個(gè)臨界值探測對象（不管是固定的或是操 作人員能接近的，包括邏輯運(yùn)算）當(dāng)加法器到達(dá)或超過計(jì)時(shí)器的時(shí)間t,輸出端C從0轉(zhuǎn)換到1,只要加法器的值超過時(shí)間t,這輸出值就被限定在“1ABSet point accessible to the operatorIndication of totalized time> LOGICAL

15、ACTION6.9SEQUENCER6.9.1GeneralAs ISA symbols are used for all combinatory logics, SFC (Grafcet) symbols are used when asequential logic is implemented, cyclic process. SFC (Grafcet) ordered succession of steps connected by directed links.especially for sequencer is anandtransitionsDetailed explanati

16、ons about symbols are not given functionalities are pointed out.6.9.2Step6.9.2.1SymbolSFC here.(Grafcet)Only theFigure 1Step nbStep nameConnection to one of the associated actions or logic6.9.2.2DefinitionA step defines an unvarying running of either whole or part of automatism.In a given time, a st

17、ep is either active or inactive.Two steps in a same link branch cannot be active at the same time; when a step becomes active, the preceding one is deactivated.A set of actions or logic functions is associated to one step. They must be done every time this step is active. These actions may be intern

18、al toDCS (wait, count, display, etc.) or external (valve open, close, etc.)6.9.2.3Associated Symbolsa. Initial StepThe initial step is represented by a double square. If the DCS is rebooted, the sequencer will go to step 0. Otherwise, this step is never active in the sequencer.Figure 2Initial stepAN

19、D 1200 BOPEN MAIN VALVESFigure 3b. Connections6.9.3Transition6.9.3.1SymbolFigure 46.9.3.2DefinitionA transition indicates the possibility of evolution between steps. This evolution takes place with all of the conditions of the transition true.A transition is either validated or not validated.isIt is

20、 validated when the preceding step that connected to this transition is active.6.9.3.3FunctionalitiesThe DCS built-in sequencer block may be used to implement the specified sequence, as well combination of latch blocks if this last method is more adapted to match our requirements. resulting assembly

21、 is named "Sequencer" in the following text.Only the functionalities described inas aTheFC(Grafcet) standard are taken in account. Access to possible built-in additional facilities or running modes must not be given to the operator. If necessary, it will be convenient to put the function w

22、indow display out of use.7數(shù)字?jǐn)?shù)據(jù)處理模塊7.1 計(jì)算模塊7.1.1 符號說明UYU根據(jù)標(biāo)準(zhǔn)ISA S5.1表1,計(jì)算變量的標(biāo)記字母。Y 根據(jù)標(biāo)準(zhǔn)ISA S5.1計(jì)算模塊的標(biāo)記字母XXXXZ 計(jì)算模塊的參照符號，由以下組成：XXXX該模塊中使用的功能號Z 在功能XXXX中，該模塊的順序字7.1.2 定義計(jì)算被確認(rèn)，要么通過注釋，要么通過相互參照來 解釋計(jì)算算法。7.1.3ExamplesFigure 5: Square root extractionFigure 6: AdderAUYFigure 7: Flow rate correctionp/、NOTE F FY

23、 ) FcpressureTNOTE 1: Temperature andcompensated flow rateFigure 8: Selector: Low or High SelectS = lower (A,B,C) or upper (A,B,C)Q = display of the selected inputNOTE: Output S will be connected to upstream controller feed backs to prevent their winding-upFigure 9: Inversion of analog signal varyin

24、g from 0 to 1I-E SS = I-EFigure 10: SwitchS = A when logic InputC = 1S = B when logic InputC = 0display of theselected inputNOTE: Output S will be connected to eventualupstreamcontrollerfeed backs to prevent their winding-upFigure 11: Toggle SwitchS = A as soon as logic Input C rises to 1 and remain

25、s = A till logic Input D rises to 1S = B as soon as logic Input D rises to 1 and remains = B till logic Input C rises to 1display of theselected inputNOTE: Output S will be connected to eventualupstreamcontrollerfeed backs to prevent their winding-upFigure 12: Totalizer AccumulatorOn pulsed Input B

26、=1, S=Accumulation of Afollowing time baseOn pulsed Input C =1,Accumulation of A is stopped, Output S remains at its last valueOn pulsed Input D =1,Accumulationiscleared to 07.27.2.1控制模塊符號說明U母。IC根據(jù)標(biāo)準(zhǔn)ISA S5.1表1控制變量的標(biāo)記字根據(jù)標(biāo)準(zhǔn)ISA S5.1表1,表示“顯示”。表示“控制”。For 'Control'XXXXZ 控制模塊的參照符號，由以下組成:XXXX該模塊中使用的

27、功能號Z 在功能XXXX中該模塊的順序字母MMMM關(guān)于控制模塊操作模式顯示所用的方法：手動(dòng)模式MANUMethods in use: 自動(dòng)模式 AUTO串聯(lián)模式CAS內(nèi)部設(shè)定點(diǎn)INT外部設(shè)定點(diǎn)EXTNNN%在控制模塊輸出口，用百分比表示的限制比率和數(shù)值比率UMeasured variable identification letter, according to standard ISA-S5.1, table 1NOTE: This first letter may be followed by a variable modifying letter (example: D differen

28、tial).ICFunctional identification letters:Ifor IndicateCfor ControlXXXXZIdentification number consisting of:?XXXXLoop number in which this input is taken into account.?ZOptional suffix letter, if several inputs are taken into account in the same function.RDPIDMMMMNNN%In square or rectangle flags:Rev

29、erse actionDirect actionProportional, Integral, Derivative actions are need for control algorithm. When, as standard, there is no flag, only P I need is assumed.Indication about the operating mode of the controllerMethods in use:MANUAUTOManual modeAutomatic modeor AUTO + LOCALAuto mode with local or

30、 internal set-pointCASCascade modeor AUTO + REMOTEAuto mode with remote or external set-pointIndication of the value in % or of the limits in % (when preceded with > or <) prescribed at the output of the controller.7.2.2 定義控制模塊是一個(gè)計(jì)算模塊，它的運(yùn)算對象是通過數(shù) 學(xué)運(yùn)算來執(zhí)行的，任何一個(gè)外部變量 A的控制可以 根據(jù)變量B提供的外部設(shè)定點(diǎn)或根據(jù)在操作站上 顯示

31、的內(nèi)部設(shè)定值按比例和/或積 分、和/或微分進(jìn) 行調(diào)節(jié)。當(dāng)外部不使用外部設(shè)定值時(shí)，控制模塊只能用內(nèi)部 設(shè)定點(diǎn)來運(yùn)算。邏輯輸入值C從0轉(zhuǎn)換到1,將會使控制模塊轉(zhuǎn)換 到MMMM模式。邏輯輸入值C保持在“1狀態(tài)，是控制模塊在MMM 模式狀態(tài)聯(lián)鎖。邏輯輸入值C從1轉(zhuǎn)換到0,對控制模塊的操作模式 無任何影響。邏輯輸入C保持在0狀態(tài)，允許完全自由地選擇控 制模塊的操作方式，只要其它的模式不被其它邏輯輸入限定。邏輯輸入值D從0轉(zhuǎn)換到1,會使控制模塊輸出E固 定在一指示值或使指示限制有效。邏輯輸入值D保持在狀態(tài)“敬 控制模塊輸出E的 聯(lián)鎖要么在該指示值要么在指示極限內(nèi)。邏輯輸入值D從1轉(zhuǎn)換到0,對控制模塊的輸出

32、沒有影響。這種模擬參數(shù)的作用形式可以用于其它參數(shù)上。 在 這種情況下，相關(guān)參數(shù)將被提示。只要其他邏輯輸入無規(guī)定值和/或極限值，邏輯輸 入D保持在狀態(tài)“0控制模塊的輸出端D將允許游 動(dòng)。通過邏輯輸入在一個(gè)控制模塊的操作方式上聯(lián)鎖， 和/或控制模塊輸出被一邏輯輸入聯(lián)鎖。禁止在操 作站進(jìn)行任何相反的動(dòng)作。A controller is a computing block, the aim of which is to carry-out, through a numerical algorithm that is a function of the deviation of the input me

33、asure A from its set point SP, the calculation of the numeric output signal E to make this deviation decrease.-D or R-Direct or ReverseWhen its output signal E absolute value is increasing, in response to an increasing absolute deviation, the controller is said to be "Direct.-PI-PID-SP-When its

34、 output signal E absolute value is decreasing, in response to an increasing absolute deviat ion, the controller is said to be "Reverse.”As standard, and without special mention in a flag, only Proportional and Integral (reset) action parameters (-PI-) are used.The output signal is computed eith

35、er in response to deviation of measurement from set point, or in response to measurement according to special applications.As standard, controller actions Proportional and Integral (-PI-) are responsive to deviation.Especially for Temperature and Analysis controllers, it will be preferred to have De

36、rivative (-D-) responsive to measurement. It will be mentioned in a flag in the functional diagrams.The set point may be local (internal), tuned from operating console, or remote (external) (B) from a calculation or from another controller output. The controller is then working either in auto mode o

37、r in cascade mode. When the remote set point Input B is not used, the controller can only operate with its local set point in auto mode.-Mode-Manual switching of operating modes is done fromoperating console.Automatic switching to mode MMMM is done as soon as logic Input C exists. This mode MMMM rem

38、ains selected, after termination of Input C until another mode is selected (manually or automatically) i.e.; transition of logicInput C from1 to 0 hasno directeffectuponthe currentoperating mode of thecontroller,and anyactioncarried out fromconsole is inhibited until Input C terminates.-Forcing-Forc

39、ing or limitation of Output E to the value NNN% is effective as soon as logic Input D exists, and remains effective after termination of Input D until another output value is calculated or tuned (i.e., transition of logic Input D from 1 to 0 has no direct effect upon the current output value of the

40、controller, and any action carried out from console is inhibited until Input D terminates).By the same way, forcing and limitation carried-out by action of a logic input. parameter is specially designed in the flag.of other parameters can be In this case, the involved-Feed-back-To prevent winding-up

41、, the feedback signal to integral action will be connected to actual output signal, (case of controller selection), or tooutput image, (case of cascades) This connection is not represented on functional diagrams, but it is applied that it has to be carried out.See Figure 14, Figure 15, and Figure 16

42、.Figure 131 m* b*.*” Implied connection that is not actually drawn in functional diagramsa. Controllerselectionb. CascadeFigure 14to valveFigure 15When slave controller is set to LOCAL mode, the output of the master one is no more operative. The measurement of the slave controller is the representat

43、ive of the desired output for feedback.If the remote set point is modified through an operation, the reverse operation will be carried out for the slave controller measurement to be representative of the desired output for feedback.-Tracking-To carry out smooth transition between the different contr

44、ol modes, the tracking facilities will be configured for each controller, unless otherwise specified on functional diagram.a. Single controller:Transition from auto mode to manual mode makes the set point track the measure.b. Cascade controllers:Transition of slave controller UIC B from auto mode to

45、 cascade mode makes its local set point track the remote one.Transition of slave controller UIC B from cascade mode to auto mode makes the master controller UIC A switch to manual mode, with its set point tracking its measure, and its output tracking the measure of slave controller.Figure 17c. Casca

46、de controllers with calculation:Transition of slave controller UIC B from cascade mode to auto mode makes the master controller UIC A switch to manual mode, with its set point tracking its measure, and its output tracking the measure of slave controller through the reverse calculation.-Output scale-

47、A controller generally operates a valve. It is comfortable for operator to have the direct correspondence between the digital value of output signal and the actual valve opening.In the case of FC (failure closed) valves, represents the valve position, between 0 signal increases, valve gets opening).

48、the controller output & 100 % of openings gnal(whenIn the case of a FO (failure opened) valve, when signal increases, valve gets closing), it is necessary to reverse the output signal of the controller before the DCS output.Figure 19In the case of a simple cascade, the scale of the master contro

49、ller output signal will be the same as the slave measure one.Figure 20Remote set pointFigure 21The UIC controller corrects the value of the calculated flow rate F1 within plus or minus 10% of the FIC range.7.2.3例子MANU T55T AUTO7.2.4輸出范圍一個(gè)調(diào)節(jié)器通?？刂埔粋€(gè)閥，在這種情況下，調(diào)節(jié) 器的輸出信號將代表閥的開度（信號增力口，閥門打開）。對氣開（FO）閥，在DCS輸出

50、以前，有 必要將調(diào)節(jié)器的輸出信號進(jìn)行 換向。FO在串級控制中，主控制器的輸出信號將會給副控制器提供一個(gè)合適的范圍。無論是閉環(huán)或閉環(huán)中且有修正的開環(huán)都將考慮這一點(diǎn)。NOTA注：輸出范圍 2000 10000 Nm3/hNOTA注 NOTE :輸出范圍 1000/ +1000Nm3/ hUIC控制器修正計(jì)算流量F1的參數(shù)值，在FIC幅度 的士0%之間。7.3 臨界值模塊7.3.1 符號說明USYYU根據(jù)標(biāo)準(zhǔn)ISA S5.1表1,有臨界值變量的標(biāo)記字母。注：這第一個(gè)符號后面可跟第二個(gè)標(biāo)記字母（例如 D:有差異的）S開關(guān)縮寫YY 修正字母，根據(jù)ISA S5.1表1。XXXXZ 臨界值模塊的參照符號，由

51、以下組成：XXXX 該模塊中使用的功能號Z 在功能XXXX中該模塊的順序字母。7.3.2 定義Input A01 020%40%60%80%100%Output COutput DOutput E1 01 01 0根據(jù)臨界值，當(dāng)變量A的值正常時(shí)，則邏輯輸出B 為0狀態(tài)。根據(jù)臨 界值，當(dāng)變量A的值反常時(shí)，邏輯輸出 1狀態(tài)。7.3.3 例子Output B一個(gè)臨界點(diǎn)可能有一個(gè)不應(yīng)區(qū)，縮寫成 D.B在臨界點(diǎn)50%處有5%不應(yīng)區(qū)50%A當(dāng)A超過50%,輸出轉(zhuǎn)換到1。當(dāng)變量A低于45% 時(shí)，輸出重新返回“0”每個(gè)設(shè)定臨界點(diǎn)通常是確定的(操作人員可以操作，或通過組態(tài))。它被系統(tǒng)的內(nèi)部變量控制。典型的符號表

52、示如下：SPA(USH) BSP代表臨界點(diǎn)開關(guān)值，thethreshold switching value7.4 復(fù)位模塊7.4.1 符號說明<UY A|NN%|U根據(jù)標(biāo)準(zhǔn)ISA S5.1表1,變量的標(biāo)記字母。Y根據(jù)標(biāo)準(zhǔn)ISA S5.1表1,計(jì)算模塊的標(biāo)記字母.XXXXZ復(fù)位模塊的參照符號，由以下組成：XXXX 在該模塊中使用的功能號Z 在功能XXXX中，此模塊的順序字母。NN%用百分比表示的在模塊輸出值范圍的復(fù)位 值。7.4.2 定義UYAACBH NN%邏輯輸入B從0轉(zhuǎn)換到1將使模塊輸出C處于規(guī) 定的顯示為NN %的復(fù)位值。邏輯輸入B保持在狀態(tài)1聯(lián)鎖模塊輸出值C處于規(guī)定顯示為NN %的復(fù)位值。當(dāng)邏輯輸入B從1轉(zhuǎn)換到0,將迫使模塊輸出值C的 值與輸入變量的值一樣。邏輯輸入B保持在0狀態(tài)，可以認(rèn)為變量A的值在模 塊輸出C上傳遞。00%UY0% CB7.57.5.17.5.2定義7.4.3 例子如果邏輯輸入D處于1狀態(tài)，輸出C的值和輸入A 致。如果邏輯輸入D處于0狀態(tài)，輸出C將等于輸入B 值。7.6 變化速度限制模塊7.6.1 符號說明7.6.2 定義這個(gè)模塊用于限制模擬信號在增加方向或減少方 向或雙向的變化速度。限制速度和變化方向的選擇在注解中會被提示。7.7 Lead/Lag7.7.1Symbol7.7.2Definit