DBCTLCON

The DBCTLCON system initialization parameter specifies whether you want CICS to start the DBCTL connection automatically during initialization.

DBCTLCON={NO|YES}
Valid values are as follows:
NO
Do not automatically invoke DFHDBCON, the CICS DBCTL attach program, during initialization.
YES
Invoke the CICS DBCTL attach program, DFHDBCON, automatically during CICS initialization. The other information CICS needs for starting the attachment, such as the DRA startup table suffix or the DBCTL subsystem name, is taken from an INITPARM system initialization parameter.

Specifying DBCTLCON=YES means you don't need to define the DBCTL attach program in the CICS post-initialization program list table (PLT).