案例7：加氢脱硫（HDS），混合进料和缓冲罐控制-3

PCTP2006行为
PCTP 2006的子控制器行为与后期版本的很多行为是不同的。在PCTP2006中，子控制器行为是不可以配置的，这意味着所有的子控制器都不是必要控制，且不是关键优化；所有的CVs都是“Global”，所以所有的CVs都忽视子控制器状态而留下静态问题。
在PCTP 2006中子控制器inactive（非激活）

在PCTP2006中运行“Sub-controller inactive（子控制器非激活）”场景将得到与在PCTP2007或更新版本的将SULPHUR设定为“Global”的运行结果相同。你不能配置子控制器的行为且SULPHUR始终处于静态问题中。
带回家的消息
除了子系统实体，在GMB中MIMO块也是让用户更好地管理模型的另一个工具。在GMB管理大型模型时这个工具特别有用。
当处理斜坡CVs时，通常都将这些变量当作Elaborated（精心处理的）CVs，且给范围控制变量一个较高的优先级，而给精心处理的控制设定点的变量一个较低的优先级。CV优先级的概念是非常重要的。若要关注这些优先级值的详细信息，请参考其它教程和指引文档。
SMOCPro中子控制器的行为可以通过在控制器节点内的子控制器行为定义部分设定的标签进行修改。可用的两个标签是：Essential for Control（基本控制）和Critical for Optimization（关键优化）。如果一个子控制器被定义为基本控制，当任何其它理由将其状态更改为INACTIVE（未激活）时，整个控制应用程序将切换到STANDBY（待机）状态。此外，如果一个子控制器被定义为关键优化，当任何其它理由将其状态更改为INACTIVE（未激活）时，整个控制应用程序将由OPTIMIZE切换到CONTROL。

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原文：
PCTP 2006 behavior
The sub-controller behavior in PCTP 2006 is quite different from the behavior of later versions. In PCTP 2006, sub-controller behavior is not configurable meaning that all sub-controllers are not essential for control and not critical for optimization; all CVs are “Global” so all CVs remain in static problem disregarding sub-controller status.
Sub-controller inactive in PCTP 2006
Running the same scenario “Sub-controller inactive” in PCTP 2006 gets the same result as having SULPHUR set to “Global” in PCTP 2007 and newer. You cannot configure the sub-controller behavior and SULPHUR is always in the static problem.
Take Home Message
In addition to the subsystem entity, MIMO blocks are another tool at the user’s disposal to better manage models in GMB. This tool is especially useful in managing large models in GMB.
When dealing with ramp CVs, it is customary to duplicate these variables as Elaborated CVs where high priority is given to the setrange variable and a lower priority is assigned to the elaborated setpoint variable. The CV priority concept is important. For more information regarding these priority values refer to the other tutorials and the Guidelines document.
The behavior of sub-controllers in SMOCPro can be modified by flags that get set in the Sub Controller Behavior Definition section of the Controller node. The two flags available are: Essential for Control and Critical for Optimization. If a sub-controller is defined as Essential for Control, when its status changes from any reason to INACTIVE, the entire control application will switch to STANDBY. Also, if a sub-controller is defined as Critical for Optimization, when its status changes from any reason to INACTIVE, the entire control application will switch from OPTIMIZE to CONTROL.

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案例8：使用计算 –使用案例1中的脱丁烷塔来研究一个普通案例
(\ProgramFiles\ShellGlobalSolutions\PCTP\Tutorial\SMOCPro\Tutorial8_CalculationsDebutanizer.wsp)
我们来重新研究前面描述的脱丁烷塔案例。PCTP 2008引入的计算功能是用于指定运行时间计算的。请参考用户手册，了解如何进入计算的细节。
计算
打开教程工作区。我们要使用的控制器是“Debutanizer（脱丁烷塔）”。为了说明外部标签概念功能以及计算引擎，本例中我们一共引入9个计算，其中7个是在执行器执行前执行的，我们称它们为“Pre-Kernel Calculations（预内核计算）”，2个是在控制器之后执行的，我们称它们为“Post-Kernel Calculations （内核后计算）”。

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原文：
**Case 8: Using Calculations – A Sample Case Study Using the Debutanizer of Case 1 **
We revisit the debutanizer case study described earlier. The calculations feature introduced in PCTP 2008 is used to specify run time calculations. Please refer to the User’s Guide for details on how to enter calculations.
**Calculations **
Open the tutorial workspace. The controller to be used is called “Debutanizer.” To illustrate the functionality of the external tag concept as well as the calculations engine we have incorporated a total of 9 calculations into this example, 7 which execute before the controller executes and are called “Pre-Kernel Calculations” and 2 which execute after the controller and are called “Post-Kernel Calculations.”

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2016.6.13