61430001-UW輸出電子模塊
%DEV參數(shù)是在開關(guān)周期。該參數(shù)可以手動設(shè)置，也可以配置為自動。配置“自動”時自動調(diào)諧將%DEV設(shè)置為%HYS的4倍。這是提供良好自動調(diào)諧所需的最小值后果
%HYS參數(shù)是在中切換輸出之前過程必須偏離設(shè)定值的量相反的方向。該值必須等于或略大于任何工藝噪聲帶。如果噪聲帶無法確定，當%HYS參數(shù)已配置為自動。%階躍參數(shù)是閥門在前1.5個開-關(guān)循環(huán)中的變化量。在第一個循環(huán)之后自動調(diào)整器將調(diào)整步長，以將進程保持在%DEV參數(shù)的值內(nèi)。隨后自動調(diào)諧練習，該步驟將使用從上一練習計算的值，除非AT RESET參數(shù)設(shè)置為“是”或控制器已通電。自動調(diào)諧建議的動態(tài)響應(yīng)可以是：配置為快速、中等或慢速。介質(zhì)設(shè)置通常會提供一個沒有或很少的響應(yīng)超調(diào)至設(shè)定點階躍響應(yīng)。
當POST AT參數(shù)設(shè)置為YES時，控制回路將使用推薦的調(diào)整值，除非測試期間出現(xiàn)警告。
有關(guān)自動調(diào)諧的更多詳細信息，請參閱本手冊的操作部分。PID是一種比例+積分控制器，是五種控制器之一
可以在每個循環(huán)一個的基礎(chǔ)上使用的控制器類型。它使用外部反饋提供整體動作。這個塊允許與其他功能塊交互，或外部設(shè)備，如氣動控制器和切斷閥開關(guān)，以消除可能與其他控制器類型。當參數(shù)TD為非零。
控制器包括：可由操作員啟動的自動調(diào)諧功能使用快速訪問功能的面板。
當輸入A為高（1）時，控制器在正常自動模式，當?shù)停?）時，使復(fù)位R跟蹤（F-GE）。這將迫使控制器輸出跟蹤控制器限制內(nèi)的反饋，并允許控制器切換回自動而不碰撞輸出進程范圍指針參數(shù)指向另一個
具有范圍縮放的功能塊，如模擬作為過程變量的輸入。這使控制器，用于規(guī)范化
工藝范圍。如果未配置此參數(shù)，則控制器將使用0.00-100.00的范圍縮放。輸入I，當從低（0）變?yōu)楦撸?）或從從高到低將導(dǎo)致控制器初始化（即。消除該循環(huán)期間的任何比例增益動作）。當使用開關(guān)塊對設(shè)定點進行更改時，這可用于防止沖擊輸出。通電-在暖機或冷機通電期間，輸出將初始化為最小刻度和所有動態(tài)元素將在第一次掃描時在當前輸入處初始化。
The % DEV parameter is the maximum amount in % that the process should deviate from the setpoint during the
on-off cycles. This parameter can be set manually or can be configured as AUTO. When AUTO is configured, the
autotuner will set the % DEV to 4 times the % HYS. This is the minimum value needed to provide good autotuning
results.
The % HYS parameter is the amount that the process must deviate from setpoint before switching the output in the
opposite direction. This value must be equal to or slightly greater than any process noise band. If the noise band
can not be determined, the autotuner will compute it at the start of an autotuning exercise when the % HYS
parameter has been configured as AUTO.
The % STEP parameter is the amount that the valve will change on the first 1.5 on-off cycles. After the first cycles
the autotuner will adjust the step to keep the process within the value of the % DEV parameter. On subsequent
autotune exercises, the step will use the value computed from the previous exercise unless the AT RESET parameter
is set to YES or the controller has been power cycled. The dynamic response recommended by the autotuner can be
configured as Fast, Medium, or Slow. The Medium setting will normally provide a response that has no or little
overshoot to a setpoint step response.
When the POST AT parameter is set to YES, the control loop will be returned to Auto using the recommended
tuning values unless a warning occurred during the test.
More details on autotuning can be found in the Operation section of this manual. PID is a proportional + integral controller and one of five
controller types that can be used on a one per loop basis. It
uses external feedback to provide integral action. The
block allows interaction with other function blocks or
external devices, such as pneumatic controllers and shutoff
switches, to eliminate the windup that can occur with other
controller types. Derivative action is provided when the
parameter TD is non-zero. The controller includes an
autotune feature that can be initiated from the operator
faceplate using the QUICK access feature.
When input A is high (1) the controller operates in the
normal auto mode and when low (0) causes reset R to track
(F-GE). This will force the controller output to track the
feedback within the controller limits and allow the
controller to switch back to auto without bumping the
output.
The process range pointer parameter points to another
function block that has range scaling, such as an analog
input that is the process variable. This enables the
controller to normalize the tuning parameters for the
process range. If this parameter is not configured, the
controller will use a range scaling of 0.00-100.00.
Input I, when changed from low (0) to high (1) or from
high to low, will cause the controller to initialize (i.e.
eliminate any proportional gain action during that cycle).
This can be used to prevent bumping the output when changes are made to the setpoint using a switch block.
POWER UP - During a warm or cold power up, the output will be initialized to MINSCALE and all dynamic
elements will be initialized at the current input on the first scan.
