Case Background案例背景
The LCP of Water Filter Skid uses the Siemens Touch Screen (TP1500 Comfort Outdoor)with Programming software WinCC V14.
水過濾撬就地控制盤采用西門子觸摸屏(TP1500 Comfort Outdoor)，配以WinCC V14版本編程軟件。
Control authority assign to 2 users to operate in different page respectively.
控制權(quán)限分配給2個(gè)用戶用以分別操作不同頁面。
User account用戶賬戶 Authorized Operation Page授權(quán)操作頁
opera1 OPERATE
Param1 PARAMETER
Before turn to page must logon with related user account first.
跳轉(zhuǎn)進(jìn)入頁面之前必須先登錄相關(guān)用戶賬號(hào)。
Site operator reported they could not turn to page “OPERATE” after logon with user “opera1” .
現(xiàn)場(chǎng)操作員報(bào)告登錄“opera1”賬戶后還是無法進(jìn)入“OPERATE”頁面。
Site Investigation現(xiàn)場(chǎng)勘查
User Name and Password are correct, the logon status for the account showed on “User” page, but compare with another normal skid, user’s “Group” property change to “Unauthorized”.
用戶名密碼是正確的，賬戶登錄狀態(tài)在“User”頁面有顯示，但是與另一個(gè)正常機(jī)組相對(duì)照，用戶的“組”屬性變成了“未授權(quán)”。
Malfunction Analysis故障分析
Discussed with Siemens Engineer and check the HMI Program, found in the “Runtime settings > User administration” editor, these “l(fā)imit for logon attempts” function is enabled as default, and the Maximum trying time of the Password is 3 as default.
與西門子工程師討論并檢查人機(jī)界面程序，發(fā)現(xiàn)在“運(yùn)行系統(tǒng)設(shè)置>用戶管理”編輯頁面中“登錄嘗試限制”功能被默認(rèn)啟用，并且錯(cuò)誤登錄嘗試次數(shù)默認(rèn)為3次。
According to the help document, it’s clear to understand the issue of “turn to page failed” is due to enter the incorrected password accumulated to 3 times. And system automatically moves the user account from original group to “Unauthorized” group, so that the user account lost the authority to access the page.
根據(jù)幫助文檔，顯然“跳轉(zhuǎn)頁面失敗”的問題是由于輸入錯(cuò)誤的密碼累計(jì)3次造成的。系統(tǒng)自動(dòng)將用戶賬號(hào)從“原所屬”組移動(dòng)到“未授權(quán)”組，用戶賬號(hào)失去了訪問頁面的權(quán)限。
Solution解決方案
1、Re-download the HMI program, means fully reset the HMI, the locked account can back to normal.
重新下載人機(jī)界面程序，也就是說徹底重置人機(jī)界面，被鎖定的賬戶恢復(fù)正常。
2、Change the configuration in HMI program, cancel “l(fā)imit for logon attempts” function, and download. The account locked issue will be never happen.
更改人機(jī)界面程序配置，取消“登錄次數(shù)限制”功能，并下載。帳戶鎖定問題將不再發(fā)生。
3、There is another simple way without download action to unlock the user account.
還有一個(gè)簡(jiǎn)單的辦法，無需執(zhí)行下載即可解鎖賬戶
Check the help document, logon with the account which belongs to “Administrator Group” can re-active the locked user account.
查詢幫助文檔，使用屬于“管理員”組的高權(quán)限賬戶登錄，可以重新激活被鎖定的賬戶，既將賬戶從“未授權(quán)”組移回“原所屬”組。
Note: Using this way must ensure the User Management Page with the “User view” object is available on the HMI.
注意：使用這種方法要確認(rèn)人機(jī)界面中配有插入“User view”控件的用戶管理頁面。
