MVME2x自動化卡件
以下顯示了在4個通道上以1ms間隔測量的相同步進信號。它清楚地顯示了測量瓶頸造成的延遲。它還顯示了數(shù)字信號設(shè)置的效果：在遠程OPC服務(wù)器上使用快速模式?jīng)]有多大意義，盡管可以這樣做。那時處理器負載不多，但由于內(nèi)部網(wǎng)（或互聯(lián)網(wǎng)）通信延遲，實際測量周期時間可能為數(shù)百毫秒。另請參閱：監(jiān)視器和數(shù)據(jù)記錄器設(shè)置監(jiān)視器顯示中的監(jiān)視模式垃圾清除6.增加虛擬內(nèi)存雖然在設(shè)置監(jiān)視器歷史緩沖區(qū)或監(jiān)視間隔的大小時，（虛擬）內(nèi)存耗盡的可能性最大，但理論上，在更改任何設(shè)置時都是可能的。您正在更改的設(shè)置被接受，但DriveWindow無法使用這些設(shè)置的組合。高級信息10-16 DriveWindow 2當內(nèi)存用完時，會收到一條錯誤消息：您應(yīng)該首先嘗試停止其他應(yīng)用程序。如果沒有幫助，但您有大量可用硬盤空間，如果您確實需要收集大量數(shù)據(jù)，可以增加虛擬內(nèi)存的大小。請注意，您需要具有管理權(quán)限才能更改操作系統(tǒng)的虛擬內(nèi)存配置。在對虛擬內(nèi)存配置進行任何更改之前，請停止所有應(yīng)用程序。打開控制面板并單擊系統(tǒng)。高級信息驅(qū)動窗口2 10-17在系統(tǒng)中單擊高級系統(tǒng)設(shè)置。將顯示“系統(tǒng)屬性”對話框。選擇高級選項卡，然后單擊性能設(shè)置按鈕。高級信息10-18 DriveWindow 2將顯示性能選項對話框。選擇高級選項卡，然后單擊虛擬內(nèi)存更改按鈕。高級信息驅(qū)動窗口2 10-19顯示虛擬內(nèi)存對話框。選擇要更改的驅(qū)動器設(shè)置。選擇“系統(tǒng)管理大小”（推薦）或編輯“初始大小”（MB）和“最大大小”（GB）。單擊“設(shè)置”按鈕。如果需要，對其他驅(qū)動器重復上述步驟。通常，所有驅(qū)動器的分頁文件大小由系統(tǒng)自動管理（選中“自動管理所有驅(qū)動器的頁面文件大小”）。請注意，為驅(qū)動器選擇“無分頁文件”會刪除該驅(qū)動器中的虛擬內(nèi)存。準備就緒后，單擊“確定”按鈕。如果初始大小太小或沒有分頁文件，Windows可能無法進行崩潰轉(zhuǎn)儲。單擊“設(shè)置”按鈕時，要求您接受此條件。高級信息10-20 DriveWindow 2單擊“確定”關(guān)閉“虛擬內(nèi)存”對話框時，將顯示一條警告消息，告訴您所做的更改需要重新啟動計算機才能生效。關(guān)閉“系統(tǒng)屬性”對話框后，將顯示一條請求重新啟動計算機的消息。重新啟動電腦后，所做的更改才會生效。單擊“立即重新啟動”按鈕立即重新啟動，如果要稍后重新啟動電腦，請單擊“稍后重新啟動”。7.緩存當一個值顯示在屏幕上時，通常不會直接從驅(qū)動器中獲取。我們將在這里解釋在DriveWindow和DriveOPC中移動數(shù)據(jù)的原理。這里我們使用以下OPC術(shù)語：?設(shè)備與驅(qū)動器（控制板）相同?組是DriveOPC中的項目集合。它與驅(qū)動器中的參數(shù)組不同。
The following shows the same stepping signal measured on four channels with 1 ms interval. It clearly shows the delays caused measurement bottle-neck. It also shows the effect of digital signal settings: Using fast mode with a remote OPC Server does not make much sense, although it is possible to do it. There is not much processor load then, but the actual measurement cycle time may be several hundreds of milliseconds because of the intranet (or internet) communication delays. See Also: Monitor and Dataloggers Setting Monitoring Mode Garbage Removal from Monitor Display 6. Increasing Virtual Memory Although the possibility of running out of (virtual) memory is greatest when you are setting size of the monitor history buffer or the monitoring interval, it is, in theory, possible while changing any of the settings. The setting you are changing is accepted, but the combination of settings cannot be used by DriveWindow. Advanced Information 10-16 DriveWindow 2 When you run out of memory, you get an error message: You should first try to stop other applications. If it does not help, but you have lot of free hard disk space, you can increase the size of the virtual memory, if you really need to collect huge amounts of data. Note that you need to have administrative right to be able to make changes in virtual memory configuration of the operating system. Before making any changes into the virtual memory configuration, stop all applications. Open the control panel and click System. Advanced Information DriveWindow 2 10-17 In System click Advanced system settings. A System Properties dialog box is presented. Select the Advanced tab and click the Performance Settings button. Advanced Information 10-18 DriveWindow 2 A Performance Options dialog box is presented. Select the Advanced tab and click the Virtual memory Change button. Advanced Information DriveWindow 2 10-19 A Virtual Memory dialog box is presented. Select the drive, settings of which you want to change. Either select System managed size (recommended) or edit Initial Size (MB) and Maximum Size (MB). Click the Set button. Repeat for other drives, if you wish. Typically paging file size for all drives is managed automatically by system (Automatically manage paging file size for all drives is checked). Note that selecting No paging file for a drive removes the virtual memory from that drive. When you are ready, click the OK button. If the initial size is too small or there is no paging file, Windows may not be able to make a crash dump. You are requested to accept this condition when you click the Set button. Advanced Information 10-20 DriveWindow 2 When you close the Virtual Memory dialog box by clicking OK, a warning message is shown, which tells you that the changes you made require restarting your computer before they take effect. After you close the System Properties dialog box, a message requesting to restart your computer is shown. The changes you made do not take effect until your PC is restarted. Click the Restart Now button to restart immediately, click Restart Later, if you want to restart your PC later. 7. Caching When a value is displayed on the screen, it is usually not fetched directly from a drive. We will explain here the principles of moving data around in DriveWindow and DriveOPC. We use here the following OPC terminology: ? Device is same as drive (control board) ? Group is a collection of items within DriveOPC. It is not the same as a parameter group in a drive.
