With most new PC-based SCADA packages being based on Windows NT, some of the facilities we have previously taken for granted on other PC-based operating systems now require a certain amount of cunning to implement.
So The SCADA Centre provides the following useful thought.
One of the difficulties is the insistence of NT to only operate user applications when having a known authorised user logged on – as part of NT’s security model.
For SCADA systems that must auto-boot into a fully operational state without any user intervention this can be a difficult issue – since a user has to be present to provide a valid user name and password before the foreground applications can be started!
However, this can be circumnavigated by auto-logging a user into Windows NT using the following few steps.
In RegEdit go to the key “HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogon”
Add a value entry named AutoAdminLogon of type REG_SZ, and specify a value of 1.
Add a value entry named DefaultPassword of type REG_SZ, and enter the password of the user listed under the value DefaultUserName.
Your NT system will now auto-boot into that user automatically.
Incidentally, if you ever want to stop the auto-booting procedure just hold down the shift key during the boot process. The normal login window will then appear.
The SCADA Centre, Tel: 01825 713488; Fax: 713474.
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