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另請參閱：什么是OPC服務器脫機OPC脫機模式3。有關OPC服務器的信息如果您想了解當前連接的OPC服務器的相關信息，請從“網(wǎng)絡”菜單中選擇“網(wǎng)絡服務器狀態(tài)”。OPC服務器7-8 DriveWindow 2顯示OPC服務器狀態(tài)對話框。您可能特別感興趣的信息是，正在使用進程內(nèi)服務器（DLL）還是本地服務器（EXE）。您還可以看到版本號和內(nèi)部版本號。單擊“確定”按鈕關閉對話框。另請參閱：什么是OPC服務器OPC服務器驅(qū)動窗口2 7-9 4。查看和更改OPC設置可以查看和更改當前顯示的項目集的聯(lián)機項目或故障和事件的OPC設置。每個項目集都有自己的設置。實際上，OPC設置可以被視為項目集的屬性。但是，您很少需要對它們進行任何更改，因此它們在DriveWindow中單獨顯示。請注意，每個項目集都有自己的OPC組。為了保持低通信流量，僅激活當前顯示的項目集的組。請注意，您所做的更改將與工作區(qū)一起保存/恢復。我們不鼓勵你做任何改變。只有當您連接到網(wǎng)絡相對較慢的遠程OPC服務器時，和/或您希望在項目集中有大量項目聯(lián)機時，您才能為該項目集使用比正常（本地：1秒，遠程：3秒）更高的更新率。注意，DriveWindow使用的OPC服務器中還有其他組。但是，您無法查看和更改其設置。要查看或更改當前顯示的項目集的OPC設置，請從桌面菜單的項目集子菜單中選擇OPC設置命令。此時將顯示OPC設置對話框。如果OPC服務器是DriveOPC，則服務器不使用死區(qū)、時間偏差和LCID值，盡管這些值可以接受。筆記不要取消選中Active字段。如果您這樣做，在線值的更新將停止，因為在OPC服務器中進行讀取的線程將停止。實際上，唯一可以更改的字段是“更新速率”。OPC服務器7-10 DriveWindow 2如果未進行任何更改，請單擊“取消”按鈕。單擊確定按鈕將新值寫入OPC服務器并關閉對話框。單擊應用按鈕將值寫入OPC服務器，而不關閉對話框。請注意，不能通過單擊“應用”取消已寫入的值。實際上，首先單擊“應用”，然后單擊“取消”與單擊“確定”具有相同的效果。另請參閱：什么是OPC服務器5.斷開OPC服務器請注意，如果要打開圖形（.dwt）文件或工作區(qū)（.ddw）文件，則無需斷開OPC Server。如果需要，DriveWindow會在連接到新的OPC服務器之前自動執(zhí)行此操作。要斷開當前連接的OPC服務器，請從“網(wǎng)絡”菜單中選擇“斷開服務器”，或按Ctrl+Shift+N。在上下文菜單中可以找到相同的命令，當連接時，當瀏覽樹窗格為空時，即沒有驅(qū)動器且沒有打開的參數(shù)文件時，可以通過在瀏覽樹窗格上單擊鼠標右鍵獲得該命令。如果您已控制，則需要確認釋放控制。OPC服務器驅(qū)動窗口2 7-11成功斷開連接后，標題欄中顯示：斷開連接的副作用是：?釋放控制。?監(jiān)視器停止并清除。將從監(jiān)視器中刪除所有通道。
See Also: What is OPC Server OfflineOPC Off-line Mode 3. Information about OPC Server If you want information about the currently connected OPC Server, select Network Server Status from the Network menu. OPC Server 7-8 DriveWindow 2 An OPC Server Status dialog box is presented. Information of special interest to you might be, whether the in-process server (DLL) or local server (EXE) is in use. You can also see version and build numbers. Click the OK button to close the dialog box. See Also: What is OPC Server OPC Server DriveWindow 2 7-9 4. Viewing and Changing OPC Settings The OPC settings of the on-line items or faults and events of the currently shown item set can be viewed and changed. Each item set has settings of its own. Actually OPC settings can be regarded as properties of the item set. However, you seldom need to make any changes to them, so they are presented separately in DriveWindow. Note that that each item set has an OPC group of its own. To keep the communication traffic low, only the group of the currently displayed item set is made active. Note that the changes you make are saved/restored with a workspace. We discourage you to make any changes. Only if you are connected to a remote OPC Server with a relatively slow network, and/or you want to have a huge amount of items on-line in an item set, you can use bigger update rate than the normal (local: 1 s, remote: 3 s) for that item set. Note that there are also other groups in the OPC Server used by DriveWindow. However, you are not able to view and change their settings. To view or change the OPC settings of the currently displayed item set, select the OPC Settings command from the Item Set submenu of the Desktop menu. An OPC Settings dialog box is presented. If the OPC Server is DriveOPC, the values Deadband, Time Bias, and LCID are not used, although accepted, by the server. Note! Do not uncheck the Active field. If you do, updating of the on-line values ceases, because the thread doing the reading in the OPC Server stops. In practice, the only field you may change is Update Rate. OPC Server 7-10 DriveWindow 2 If you did not make any changes, click the Cancel button. Clicking the OK button writes the new values to the OPC Server and closes the dialog box. Clicking the Apply button writes the values to OPC Server without closing the dialog box. Note that you cannot cancel the values already written by clicking Apply. Actually, clicking first Apply and then Cancel has the same effect as clicking OK. See Also: What is OPC Server 5. Disconnecting OPC Server Note that you do not need to disconnect the OPC Server in case you are opening a graph (.dwt) file or a workspace (.dww) file. DriveWindow does it automatically, if required, before connecting to a new OPC Server. To disconnect the currently connected OPC Server, select Disconnect Server from the Network menu or by pressing Ctrl+Shift+N. The same command can be found in the context menu, which you get by clicking with the right mouse button on the browse tree pane when it is empty while you are connected, i.e., there is no drive and you do not have a parameter file open. If you have control taken, you need to confirm releasing of control. OPC Server DriveWindow 2 7-11 After successful disconnection, is shown in the title bar: Side effects of disconnecting are: ? Control is released. ? The monitor is stopped and cleared. All channels are removed from the monitor.
