*************** 6AV6643-0CD01-1AX1西门子触摸屏 *******************

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6AV6643-0CD01-1AX1西门子触摸屏渠道商介绍,SIEMENS Touch Screen HMI “limit for logon attempts” Function
西门子触摸屏人机界面“登录尝试限制”功用



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.

水过滤撬就地控制盘采用西门子触摸屏（TP1500 Comfort Outdoor），配以WinCC V14版本编程软件。



Control authority assign to 2 users to operate in different page respectively.

控制权限分配给2个用户用以分别操作不同页面。



User account

用户账户

Authorized Operation Page

受权操作页

opera1

OPERATE

Param1

PARAMETER

Before turn to page must logon with related user account first.

跳转进入页面之前必需先登录相关用户账号。



Site operator reported they could not turn to page “OPERATE” after logon with user “opera1” .

现场操作员报告登录“opera1”账户后还是无法进入“OPERATE”页面。



Site Investigation现场勘查:
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”.

用户名密码是正确的，账户登录状态在“User”页面有显现，但是与另一个正常机组相对照，用户的“组”属性变成了“未受权”。





Malfunction Analysis毛病剖析:
Discussed with Siemens Engineer and check the HMI Program, found in the “Runtime settings > User administration” editor, these “limit for logon attempts” function is enabled as default, and the Maximum trying time of the Password is 3 as default.

与西门子工程师讨论并检查人机界面程序，发如今“运转系统设置>用户管理”编辑页面中“登录尝试限制”功用被默许启用，并且错误登录尝试次数默许为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.

依据协助文档，显然“跳转页面失败”的问题是由于输入错误的密码累计3次形成的。系统自动将用户账号从“原所属”组挪动到“未受权”组，用户账号失去了访问页面的权限。





Solution处理计划：
1.Re-download the HMI program, means fully reset the HMI, the locked account can back to normal.
重新下载人机界面程序，也就是说彻底重置人机界面，被锁定的账户恢复正常。


2.Change the configuration in HMI program, cancel “limit for logon attempts” function, and download. The account locked issue will be never happen.
更改人机界面程序配置，取消“登录次数限制”功用，并下载。帐户锁定问题将不再发作。


3.There is another simple way without download action to unlock the user account.
还有一个简单的方法，无需执行下载即可解锁账户



Check the help document, logon with the account which belongs to “Administrator Group” can re-active the locked user account.
查询协助文档，运用属于“管理员”组的高权限账户登录，能够重新**被锁定的账户，既将账户从“未受权”组移回“原所属”组。

资讯来源：汕头罗克自动化