How an application program indicates draining

An application program indicates:

Draining responsibility by issuing the APPCCMD CONTROL=OPRCNTL, QUALIFY=CNOS macroinstruction and specifying the CNOS session limits control block where the values are set. DRAINL (SLCDRAL) is used for the source side and DRAINR (SLCDRAP) for the target side of the CNOS request.
Draining acceptance by issuing the APPCCMD CONTROL=OPRCNTL, QUALIFY=DEFINE macroinstruction and specifying the DEFINE control block where the values are set. The DDRAINL (SLDDDRAL) value is used when the LU is the target side of a CNOS request. This macroinstruction is used when an application program is defining its negotiation values to be used for a CNOS request.

When VTAM® builds and initializes the CNOS control block and a mode entry has not been added to the LU-mode table, VTAM uses the values from the APPL definition statement or the VTAM default values.