Understanding the methods of EXCP AutoLogon session initialization

The following methods are available for issuing a START command to initialize an EXCP AutoLogon session:

• Automation or scheduling product 
  A START command that is configured to an automation or scheduling product typically can be up to 256 character spaces, depending on the product.

  You might want to configure one or more EXCP terminals to be initialized automatically whenever VTAM or JES fails, or when these subsystems are brought down for maintenance. See your automation or scheduling product documentation for more information.
  
  

• Operator command 

  The operator-entered START command string can be up to 121 character spaces in length.

  If you cannot fit all of the required parameters for your EXCP session onto the operator command line, you can perform the following steps:

  1. Define a BBVTASxx member (see Defining-other-LAS-and-TAS-initialization-parameter-lists) to contain the LOGON command and parameters.
  2. Point to this member in the START command by using the SUF keyword (see Defining-the-START-command-for-EXCP-AutoLogon-sessions for more information).
     
     

• IPL procedure 
  Sixty-five bytes are provided for a START command in an IPL procedure, such as the COMMNDxx member of SYS1.PARMLIB.

  You must use the SUF keyword that points to a BBVTASxx member in a START command that configured to your system’s IPL procedure. (See Defining-the-START-command-for-EXCP-AutoLogon-sessions for more information about using the START command and the SUF keyword; see Defining-BBVTASxx-members-for-EXCP-AutoLogon-sessions for more information about defining BBVTASxx members.)