MVME51005E-0163自動化模塊備件
新值顯示在監(jiān)視器設(shè)置窗格中。歷史緩沖區(qū)有一些限制：?以毫秒為單位的值必須至少與間隔一樣大。?該值不得超過2147483647毫秒（幾乎25天）。?該值不能小于當(dāng)前x軸長度。?該值必須是間隔的倍數(shù)。例如，如果間隔為3毫秒，則歷史緩沖區(qū)大小10秒無效。?如果歷史緩沖區(qū)大小較大且間隔較小，則可能會耗盡虛擬內(nèi)存。趨勢6-26 DriveWindow 2如果值無效，單擊OK（確定）按鈕時將顯示錯誤消息。您必須確認(rèn)錯誤消息并編輯無效值或取消操作。一些錯誤消息會詢問，是否希望DriveWindow為您找到合適的值。趨勢DriveWindow 2 6-27如果單擊“是”按鈕，對話框中的值將從您輸入的值更改為DriveWindow建議的值。因此，您仍有機(jī)會編輯值（或取消操作）。如果輸入的值小于x軸長度，則可以選擇將x軸長度減小為等于歷史緩沖區(qū)大小。如果單擊“是”，則接受歷史緩沖區(qū)大小，但x軸長度也會更改。另請參閱：通用趨勢設(shè)置恢復(fù)默認(rèn)設(shè)置設(shè)置監(jiān)視器監(jiān)視器和數(shù)據(jù)記錄器監(jiān)視器設(shè)置監(jiān)視器菜單監(jiān)視器設(shè)置趨勢6-28驅(qū)動窗口2 3.4設(shè)置和刪除監(jiān)控變量只有在清除監(jiān)視器時，才能設(shè)置、添加和刪除要監(jiān)控的變量。此外，更改受監(jiān)控變量的驅(qū)動需要清除監(jiān)視器。原則上，如果您使用正常模式，您可以監(jiān)視任何未讀保護(hù)的項(xiàng)目?？焖倌Ｊ礁呦拗菩浴Ｊ鼙O(jiān)控的變量可以位于不同的驅(qū)動器中。但是，DriveOPC將所有監(jiān)測值轉(zhuǎn)換為實(shí)際值。這意味著監(jiān)視字符串類型的值沒有意義，因?yàn)橥ǔＧ闆r下，它們不能轉(zhuǎn)換為實(shí)數(shù)。如果要監(jiān)視除實(shí)數(shù)或整數(shù)以外的其他類型的變量：?枚舉值以整數(shù)或布爾值的形式收集。當(dāng)被監(jiān)控時，它們不會轉(zhuǎn)換為枚舉字符串。?布爾值false被轉(zhuǎn)換為0，true被轉(zhuǎn)換為-1。?矢量或數(shù)組類型的變量無法被監(jiān)控。有幾種方法可以添加和刪除要監(jiān)視的變量。3.4.1添加和刪除在項(xiàng)目集窗格中選擇的項(xiàng)目通常，您可以使用瀏覽的項(xiàng)目集添加和刪除受監(jiān)視的項(xiàng)目。也可以從所有參數(shù)和用戶定義的項(xiàng)目集進(jìn)行添加。要使用項(xiàng)目集添加尚未監(jiān)控的項(xiàng)目和刪除瀏覽的項(xiàng)目集中當(dāng)前監(jiān)控的項(xiàng)目，您需要在項(xiàng)目集中顯示項(xiàng)目，然后：?如果尚未選中，請選擇趨勢設(shè)置窗格中的“監(jiān)控”選項(xiàng)卡。?在瀏覽的項(xiàng)目集中選擇要添加到監(jiān)視器或從監(jiān)視器中刪除的項(xiàng)目，或在所有參數(shù)或用戶定義的項(xiàng)目集中，選擇要添加至監(jiān)視器的項(xiàng)目。?在項(xiàng)目集中聚焦時，單擊監(jiān)視器工具欄中的添加監(jiān)視項(xiàng)目按鈕，或選擇監(jiān)視器菜單中的添加/刪除項(xiàng)目命令。或Trends DriveWindow 2 6-29如果您正在查看瀏覽的項(xiàng)目集，則顯示當(dāng)前監(jiān)控項(xiàng)目前面的頻道號的數(shù)字圖像將消失，并且該圖像將顯示在添加到監(jiān)視器中的項(xiàng)目前面。如果您正在查看類型為all parameters或user defined的項(xiàng)目集，則項(xiàng)目集不會發(fā)生任何更改。但是，添加到監(jiān)視器中的項(xiàng)目也會添加到瀏覽的項(xiàng)目集，其中數(shù)字圖像顯示了前面的頻道號。刪除項(xiàng)目的描述性名稱將從監(jiān)視器設(shè)置窗格中的頻道中消失，而添加項(xiàng)目的此類名稱將顯示在設(shè)置中。描述性名稱是項(xiàng)目集窗格中顯示的名稱，不一定與驅(qū)動器中的名稱相同。
The new value is shown in the monitor settings pane. There are restrictions about the history buffer: ? The value in milliseconds must be at least as big as the interval. ? The value must not exceed 2147483647 ms (almost 25 days). ? The value cannot be less than the current x-axis length. ? The value must be multiple of the interval. For example, if interval is 3 ms, history buffer size 10 s is invalid. ? If the history buffer size is big and the interval is small, you may run out of virtual memory. Trends 6-26 DriveWindow 2 If the value is invalid, an error message is displayed, when you click the OK button. You have to acknowledge the error message and edit the invalid value or cancel the operation. Some of the error messages ask, if you want DriveWindow to find a proper value for you. Trends DriveWindow 2 6-27 If you click the Yes button, the value in the dialog box is changed from the value you entered to a value suggested by DriveWindow. So, you still have the opportunity to edit the value (or cancel the operation). If you have entered a value, which is less than the x-axis length, you have the option to reduce the xaxis length to be equal to the history buffer size. If you click Yes, your history buffer size is accepted, but the x-axis length is changed, too. See Also: Common Trend Settings Restoring Default Settings Setting Monitor Monitor and Dataloggers Monitor Settings Monitor Menu Context Menu of Monitor Settings Trends 6-28 DriveWindow 2 3.4 Setting and Removing Monitored Variables You can set, add, and remove variables to be monitored only when the monitor is cleared. Also changing the drive of monitored variables requires the monitor to be cleared. In principle, you can monitor any item as long as it is not read-protected, if you use the normal mode. Fast mode is more restrictive. The monitored variables can reside in different drives. However, all monitored values are converted into real by DriveOPC. It means that it is not meaningful to monitor string type of values, because in general, they cannot be converted to a real number. If you are monitoring other types of variables than real or integer: ? Enumerated values are collected as integers or Booleans. They are not converted to enumeration strings when monitored.? Boolean value false is converted to 0 and true to -1. ? Vector or array types of variables cannot be monitored. There are several ways to add and remove variables to be monitored. 3.4.1 Adding and removing items selected in the item sets pane Typically you add and remove monitored items by using the browsed item set. Adding can be done also from all parameters and user defined item sets. To use an item set in adding items not yet monitored and removing items now monitored in the browsed item set, you need to have the items shown in the item set, and then: ? If not yet selected, select the Monitor tab in the trend settings pane. ? Select items, which you want to add to or remove from the monitor, in the browsed item set, or select items, which you want to add to the monitor in an all parameters or user defined item set. ? While focus in the item set, either click the add monitored items button in the monitor toolbar, or select the Add/Remove Items command in the Monitor menu. or Trends DriveWindow 2 6-29 If you are viewing the browsed item set, the numeric images showing the channel number in front of the now monitored items disappear, and such an image appears in front of the items, which were added into the monitor. If you are viewing an item set of type all parameters or user defined, there is no change in the item set. However, the items added to the monitor are also added to the browsed item set with numeric images showing the channel number in front of them. The descriptive names of the removed items disappear from the channels in the monitor settings pane, and such names of the added items appear in the settings. The descriptive name is the one shown in the item sets pane, which is not necessarily the same as in the drive.
