Use of the CONTROL keyword

The CONTROL keyword specifies one of the major functions of the APPCCMD macroinstruction. Table 1 describes the CONTROL keyword operands and the functions they specify.

Table 1. CONTROL keyword operands and their meanings
Operand	Function
ALLOC	Allocate a conversation.
CHECK	Await completion of an asynchronous macroinstruction and update RPL and RPL extension fields.
DEALLOC	Deallocate a conversation.
DEALLOCQ	Deallocate a conversation.
OPRCNTL	Execute an LU 6.2 control-operator request, such as changing the number of sessions between two LUs.
PREALLOC	Reserve a session for a conversation without sending an FMH-5.
PREPRCV	Switch from SEND state to RECEIVE state (half-duplex conversations only).
RCVFMH5	Receive the function management header required to start a conversation.
RCVEXPD	Receive expedited information from a partner LU on a full-duplex capable session.
RECEIVE	Receive normal information from a partner LU.
REJECT	End a session and conversation due to error and cleanup.
RESETRCV	Reset the conversation's continuation mode
SEND	Send data to a conversation partner.
SENDEXPD	Send expedited data to a conversation partner on a full-duplex capable session.
SENDFMH5	Send the FMH-5 to a partner LU for a preallocated conversation.
SENDRCV	Send data to a conversation partner and receive normal information from the partner (half-duplex only).
SETSESS	Transfer information that pertains to a session between the LU 6.2 function in VTAM® and the application program (half-duplex conversations only).
TESTSTAT	Query the current status of conversations.