自动填充DCS位号属性~Auto Fill DCS Tag Attributes -3

领域	默认值	描述
Max Time Off Control [t/v]（允许脱开控制的最大时间）	0	当MV设定为INACTIVE时启动的计时器。如果计时器超过此规定值（s）且MV是重要控制，则该MV的子控制器将设定为INACTIVE。
Maximum Move Size [t/v]（最大动作幅度）	10000000	这是控制器每次执行时MV输出所允许改变的最大值。
Setpoint Readback Precision Tolerance [v]（设定值回读精确容忍）	0	PCTP 2012之前的工作区将默认更新为0.1**MaxMove（当 MaxMove被定义为值时）。 这样可以适应DCS因数值精度或相关回读死区等可能生成的舍入误差。如果回读值和之前记下值的差小于此公差，下一步动作计算将以之前记下值为基础。否则，下一步动作计算将以之前的回读值为基础，并提供一个警告信息。在工作区中其必须被指定为一个>0的值（不能设置为位号且不能为负值）。升级工作区：对所有MV若其MaxMove都被指定为值，当打开PCTP 2012中现有工作区时，公差将按下式自动生成：SPRB Precision Tolerance = 0.1 MaxMove；SPRB Error Tolerance = MaxMove对所有MV若其MaxMove被指定为DCS位号，这些公差默认值将设定为0，在EXA文件搭建之前你需要设定一个有效值。
Setpoint Readback Error Tolerance [v]（设定值回读误差容忍）	0	PCTP 2012之前的工作区将默认更新MaxMove（当MaxMove被定义为值时）。 如果回读值和之前记下值的差大于此公差，主控制器将切换为standby且给出一条错误信息。在工作区中其必须指定为一个>0的值（不能设置为位号且不能为负值）。
Weight [v]（权重）	从控制器读取	这是将被传递到在线系统（不可编辑）的MV Weight。(二次优化问题中的R值)
Calculated High Limit [t/v]（计算高限）	0.0	根据Setpoint High/Low Limit, Valve High/Low Limit和Valve Gain Near High/Low Limit计算内部MV高限。 只有当Advanced选中时才可见。对于正/反作用控制器： 其中HiLim根据Valve Gain Near High Limit 或Valve Gain Near Low Limit上述规范被计算。

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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.

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2016.6.26