CICS Interface 47
IBM 3270 terminals (IODEV = 11)
filled in, the user presses the ENTER key and the data is transmitted from the
terminal to Model 204 for processing.
Program Function (PF) keys are supported by Model 204 only when you
access a screen formatted through the User Language full-screen formatting
feature. Otherwise, PF keys are not supported and cannot be used to enter
data. Any line entered by means of a PF key is considered null, and any data
entered is lost.
Attention key
The PA1 key serves as the attention key on IBM 3270 terminals, unless you
have reassigned the attention key through the FSATTN parameter. For more
information on the FSATTN parameter, refer to the Model 204 Parameter and
Command Reference Manual.
Screen-formatting parameters
The screen-formatting parameters listed in Table 4-1 apply to IBM 3270
terminals being used through CICS. The PGSEP parameter is not listed; it is
not used with IBM 3270 terminals.
The values of the first five parameters, which determine the size of the screen,
are established by the value of the MODEL parameter, which corresponds to
the terminal model within the 3270 family. Model 204 automatically sets
MODEL to the appropriate value for SNA Communications Server (formerly
VTAM) 3270s used through CICS, but the user also can reset it.
Terminal model options
Table 5-2 below shows the valid settings for MODEL, the corresponding
terminal type, and the corresponding default values for the screen size
Table 4-1. Screen-formatting parameters for the CICS interface
Parameter Meaning
INMRL Maximum input line length for terminal
INCCC Input continuation column
LOUTPB Length of output page buffer
OUTMRL Maximum output line length for terminal
OUTCCC Output continuation column
OUTLPP Number of lines per page, including headers and trailers
MODEL Array of screen size parameters for the particular 3270 model
HDRCTL Page formatting options
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