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Plant SCADA

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Add a Plant SCADA User

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  • Last UpdatedSep 09, 2026
  • 3 minute read

Before you add a Plant SCADA user to your project, check the Reserved User Names list. This list details built-in users already included in Plant SCADA.

Note: You can also use Windows user groups to manage runtime security. See Integrate Windows User Groups for more information.

To add a user:

  1. In the Security activity, select Users.

  2. Add a row to the Grid Editor.

  3. Type the required information in each column, or in the fields in the Property Grid.

    For a description of the properties, see below.

  4. Click Save.

You can also group several Plant SCADA users together and define a name for the group. See Add a Group.

Note: If you restore a project from a backup, or install a new project from a compiled offline master, the runtime user details might be thrown out of synchronization. For more information, see User Records and Project Restoration).

User Properties

General Properties

Property

Description

User Name

The user's name. Enter a value of 16 characters or less. User Names are restricted to using the same syntax as Tag names. See Tag name syntax.

Full Name

The full name of the user or class of user. Enter a value of 32 characters or less. This name is used as a comment and for display in alarm logs and command logs.

Password

The user's password. When you double click in this cell or when you select Change next to the Password field in the Property Grid, the Set Password dialog is displayed. In the New Password field, enter a value of 64 characters or less. Enter the same password in the Confirm Password field and click OK. When you enter the passwords six dots (.) will be displayed for the password. When you save the user record, the password will be encrypted before it is saved to the Users.dbf. If the contents of the Password and Confirm Password fields are different when the record is saved, a message will be displayed that indicates a mismatch and invites you to try again.

Roles

Each user is assigned roles. The Roles field will accept zero or more comma-separated role names. If zero roles are specified for the user, this is the same as configuring the user with no privileges.

Note: When a Windows or Plant SCADA user who is linked to multiple roles logs onto runtime the privileges and areas that the user will be assigned are the combined privileges of the linked roles.

Comment

Any useful comment. Enter a value of 48 characters or less.

Password version

Indicates the version of the algorithm used to generate password hash values. A value of 3 indicates the password was set in Plant SCADA 2026 and is using the most secure version of the algorithm. A value less than 3 indicates the password was set in an earlier version of Plant SCADA using a deprecated algorithm.

Once all Plant SCADA clients have been upgraded to Plant SCADA 2026, and all CtAPI client applications have been upgraded to use the 2026 CtAPI redistributable, it is recommended to update all passwords to ensure the most secure algorithm is being used.

A compiler warning will be reported if any users are using a deprecated algorithm.

Note: AVEVA Historian Plant SCADA Connector v4.0 (or earlier) is not compatible with passwords generated using the updated password algorithm introduced in Plant SCADA 2026. Connections between Plant SCADA and this version of the Historian Connector will not succeed if authentication uses a Plant SCADA user account with a password created or updated in Plant SCADA 2026. Until a new version of the Historian Plant SCADA Connector is released, it is recommended that Windows authentication be used to secure the connection to Plant SCADA.

Seed

Indicates if each password is uniquely encrypted. If you duplicate a user account (by copying and pasting a row), the password for each will have the same seed. This will cause generate a compile error message. To solve this problem, you need to change the password for each account.

If you need to keep the same password for the duplicated accounts, you can select all of the duplicated users in the Grid Editor, and Change the password in the Property Grid. This will generate new seeds for each of the duplicated accounts.

Project Properties

Property

Description

Project

The project in which the user is included.