| 領(lǐng)域 | 默認(rèn)值 | 描述 |
|---|---|---|
| Max Time Off Control [t/v]（允許脫開控制的最大時間） | 0 | 當(dāng)MV設(shè)定為INACTIVE時啟動的計時器。如果計時器超過此規(guī)定值（s）且MV是重要控制，則該MV的子控制器將設(shè)定為INACTIVE。 |
| Maximum Move Size [t/v]（最大動作幅度） | 10000000 | 這是控制器每次執(zhí)行時MV輸出所允許改變的最大值。 |
| Setpoint Readback Precision Tolerance [v]（設(shè)定值回讀精確容忍） | 0 | PCTP 2012之前的工作區(qū)將默認(rèn)更新為0.1**MaxMove（當(dāng) MaxMove被定義為值時）。 這樣可以適應(yīng)DCS因數(shù)值精度或相關(guān)回讀死區(qū)等可能生成的舍入誤差。如果回讀值和之前記下值的差小于此公差，下一步動作計算將以之前記下值為基礎(chǔ)。否則，下一步動作計算將以之前的回讀值為基礎(chǔ)，并提供一個警告信息。在工作區(qū)中其必須被指定為一個>0的值（不能設(shè)置為位號且不能為負(fù)值）。升級工作區(qū)：對所有MV若其MaxMove都被指定為值，當(dāng)打開PCTP 2012中現(xiàn)有工作區(qū)時，公差將按下式自動生成：SPRB Precision Tolerance = 0.1 MaxMove；SPRB Error Tolerance = MaxMove對所有MV若其MaxMove被指定為DCS位號，這些公差默認(rèn)值將設(shè)定為0，在EXA文件搭建之前你需要設(shè)定一個有效值。 |
| Setpoint Readback Error Tolerance [v]（設(shè)定值回讀誤差容忍） | 0 | PCTP 2012之前的工作區(qū)將默認(rèn)更新MaxMove（當(dāng)MaxMove被定義為值時）。 如果回讀值和之前記下值的差大于此公差，主控制器將切換為standby且給出一條錯誤信息。在工作區(qū)中其必須指定為一個>0的值（不能設(shè)置為位號且不能為負(fù)值）。 |
| Weight [v]（權(quán)重） | 從控制器讀取 | 這是將被傳遞到在線系統(tǒng)（不可編輯）的MV Weight。(二次優(yōu)化問題中的R值) |
| Calculated High Limit [t/v]（計算高限） | 0.0 | 根據(jù)Setpoint High/Low Limit, Valve High/Low Limit和Valve Gain Near High/Low Limit計算內(nèi)部MV高限。 只有當(dāng)Advanced選中時才可見。對于正/反作用控制器：  |
原文：
| Field | Default Value | Description |
|---|---|---|
| Max Time Off Control [t/v] | 0 | A timer starts when an MV is set to INACTIVE. If the timer exceeds this specified value (seconds) and the MV is Essential for Control, then the MV’s Sub-Controller will be set to INACTIVE. |
| Maximum Move Size [t/v] | 10000000 | This is the maximum amount that the MV Output is allowed to change per execution of the controller |
| Setpoint Readback Precision Tolerance [v] | 0 | Workspaces prior to PCTP 2012 will default on upgrade to 0.1 *** MaxMove (if MaxMove is defined as a value) This accommodates roundoff error the DCS may generate by either numerical precision or deadband associated with the readback.If difference between the readback and the previously written-down value is smaller than this tolerance, the next calculated move will be based upon the previously written-down value. Otherwise, the next calculated move will be based upon the readback value and a warning message will be provided.This must be specified as a value > 0 in the workspace (cannot be configured as a tag and cannot be negative).Upgrading a Workspace:For all MV’s with MaxMove already specified as a value, when opening the existing workspace in PCTP 2012 the tolerances will automatically be set for you as follows…SPRB Precision Tolerance = 0.1* MaxMoveSPRB Error Tolerance = For all MV’s with MaxMove specified as a DCS tag, these tolerances will default to a value of zero and you will be required to set a valid value before the EXA file will build. |
| Setpoint Readback Error Tolerance [v] | 0 | Workspaces prior to PCTP 2012 will default on upgrade to MaxMove(if MaxMove is defined as a value) If the difference between the readback the the previously written-down value is greater than this tolerance the main controller will shed to standby and an error message will be given.This must be specified as a value > 0 the workspace (cannot be configured as a tag and cannot be negative) |
| Weight [v] | From the controller. | This is the MV Weight (R value in the quadratic optimization problem) that will be transferred to the online system (not editable). |
| Calculated High Limit [t/v] | 0.0 | Calculated internal MV high limit based on Setpoint High/Low Limit, Valve High/Low Limit and Valve Gain Near High/Low Limit. Visible only when Advanced option is selected.For both direct and reverse acting controllers:where HiLim is computed as per the Valve Gain Near High Limit or Valve Gain Near Low Limit specification above. |
2016.6.26
