Assigning User-Defined PSIDs
You can replace the default PSID values with your own definitions or define new PSIDs, by preparing a PSID definition file or by changing the Windows® workstation profile. The PSIDs you use must be defined to VTAM®.
Add a statement such as the following one to the [LU] definition
in the workstation profile. This example supersedes the default PSID with
LUA0001.
PSID = LUA0001