B9 干擾變量視圖
Disturbance Variable（干擾變量）數(shù)據(jù)在選中的控制器下的DV視圖下顯示和輸入乡革。
Disturbance Variable View（干擾變量視圖）可在“ENG”和“OPE”兩個(gè)模式下操作。以下是ENG模式的HIS窗口。
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條目說(shuō)明
需要操作員和工程師輸入的各個(gè)條目/參數(shù)如下。
|條目 |描述| 操作員模式| 工程師模式|
| ------------- |:-------------:| -----:|
|Tag Name（位號(hào)名）| DV位號(hào)名袍嬉。 |R| R|
|Tag Comment （位號(hào)描述）| DV描述暴氏。 |R |R|
|Measurement （測(cè)量值）| DV測(cè)量值（從DCS傳輸?shù)母蓴_量實(shí)際PV值）。 |R |R|
|Bad Value（壞值）| TRUE表示DV測(cè)量值的質(zhì)量是壞的羞福； FALSE表示DV測(cè)量值的質(zhì)量是好的。 |R| R|
|Disconnect（斷開(kāi)連接）| 當(dāng)要禁止控制器使用該DV時(shí)蚯涮，選擇TRUE治专。MEASUREMENT（測(cè)量值）將被完全忽略。這在維護(hù)工作或特殊工藝操作條件期間是有意義的遭顶。 當(dāng)要使控制器使用DV時(shí)選擇FALSE张峰。 |R/W| R/W|
|Essential for Control（必要的控制）| 當(dāng)DV對(duì)控制是必須的時(shí)，選擇TRUE液肌。 當(dāng)DV對(duì)控制不是必須時(shí)挟炬，選擇FALSE（默認(rèn)）。選擇TRUE將有以下效果：如果DV不可用，則Execute Control（執(zhí)行控制）將把控制器自動(dòng)切至STANDBY模式谤祖。| R |R/W|
|Max Time Invalid (Sec)（最大無(wú)效時(shí)間）| SMOC可以使用無(wú)效值的最大允許時(shí)間婿滓。| - |R/W|
|Sample&Hold Signal（采樣保持信號(hào)） |指示它是連續(xù)的（無(wú)擾動(dòng)）還是采樣保持信號(hào)（脈沖重連）。| -| R/W|
|Filter Time Constant (Sec)濾波時(shí)間常數(shù)| 在PV輸出值有大變化后的時(shí)間常數(shù)濾波粥喜。| - |R/W|
|Minimum Value（最小值） |絕對(duì)的最小可接受值凸主。| - |R/W|
|Maximum Value（最大值） |絕對(duì)的最大可接受值。| - |R/W|
|Minimum Deviation（最小偏差） |最小可接受變化值额湘。| -| R/W|
|Maximum Deviation（最大偏差）|最大可接受變化值卿吐。| -| R/W|
|Value Accepted（接受值）| TRUE：表示新的DV測(cè)量值已被SMOC接受并使用，因?yàn)槠錆M足PV檢查條件锋华。 FALSE：表示新的DV測(cè)量值未被接受嗡官，因?yàn)槠洳粷M足PV檢查條件。 BAD-表示“尚未初始化”毯焕。| R| R|
|按鈕||||
|Apply button（應(yīng)用按鈕） |如前所述衍腥。|||
|Undo button（撤銷按鈕） |在單擊Apply（應(yīng)用）按鈕之前取消一個(gè)新輸入的參數(shù)。然后該參數(shù)顯示為黑色纳猫。|||
（R :只讀, R/W :讀,寫(xiě)或執(zhí)行, -：未定義）
原文：
B9. Disturbance Variable View
Disturbance Variable data are displayed and entered on the selected DV view of the selected controller.
Disturbance Variable View has two operations such as “ENG” and “OPE” mode. Following are the HIS windows for the ENG modes.
View
Description of items
Various items/parameters need to be entered by operator and engineers are described below.
|Item| Description| Operator mode| Engineer mode|
| ------------- |:-------------:| -----:|
|Tag Name| DV Tag Name| R| R|
|Tag Comment |DV Comment |R| R|
|Measurement| Measured value of DV (This is actually a PV value from DCS for this disturbance) |R| R|
|Bad Value |TRUE indicates quality of measurement for DV is bad. FALSE- indicates quality of measurement for DV is good. |R |R|
|Disconnect| TRUE- is selected when DV is to be disabled for use by the Controller. The MEASUREMENT will be totally ignored. This is of interest during maintenance work or special process operating conditions. FALSE- is selected when DV is to be enabled for use by the controller| R/W|R/W|
|Essential for Control |TRUE- is selected when DV is essential for control. FALSE -(Default) is selected when DV is not essential for control. Selection of “TRUE” provides following effect. If in case DV is not available then “Execute Control” routine will automatically put the controller into STANDBY mode.| R |R/W|
|Max Time Invalid (Sec) |Maximum allowable time that invalid value can be used by SMOC. |-| R/W|
|Sample&Hold Signal |Indicates if it is a continuous (bumpless) or sample and hold signal (bump reconnection) |- |R/W|
|Filter Time Constant (Sec) |Time constant to filter PV out put value after a large change |- |R/W|
|Minimum Value|Absolute minimum acceptable value| - |R/W|
|Maximum Value| Absolute maximum acceptable value| -| R/W|
|Minimum Deviation| Minimum acceptable change in the value |- |R/W|
|Maximum Deviation| Maximum acceptable change in the value |- |R/W|
|Value Accepted| TRUE: Indicates that new DV measurement has been accepted and used by SMOC as it satisfies the PV check conditions. FALSE: Indicates that new DV measurement has not been accepted, as it does not satisfy the PV check conditions. BAD- indicates ‘Not yet initialized’.| R| R|
|Button|||
|Apply button |As Explained Earlier|||
|Undo button| Cancel a newly entered parameter before the “Apply” button is clicked. Then previous parameter is displayed in black.|||
（R : Read Only, R/W : Read, Write or Execute, -：Not displayed）
2017.1.7
