Sending logical record data

Logical record data is usually of interest only to transaction programs. It could, for example, consist of a bank balance inquiry and reply.

Logical record data is sent with the following macroinstructions:

APPCCMD CONTROL=SEND, QUALIFY=DATA
APPCCMD CONTROL=SEND, QUALIFY=DATAFLU
APPCCMD CONTROL=DEALLOC, QUALIFY=DATAFLU

The send buffer is always flushed with the following macroinstructions:

APPCCMD CONTROL=SEND, QUALIFY=DATAFLU|FLUSH
APPCCMD CONTROL=DEALLOC, QUALIFY=DATAFLU
APPCCMD CONTROL=DEALLOC, QUALIFY=FLUSH

The APPCCMD CONTROL=SEND, QUALIFY=DATA macroinstruction provides new data. DATAFLU and FLUSH cause VTAM® to send buffered data to the partner LU.

When sending logical record data, the application program sets the AREA field of the RPL to point to the conversation information and the RECLEN field to the length of data being sent. See Buffer list requirements for details on using buffer lists to send data.