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Data Communications
!
BLOCK MODE
A hne at a lime IS
transmll1ed after being
enabled (ENTER key or ESC dl
and t"ggered from the
computer
A Page of user defrned
length IS transmll1ed af1er
berng enabled (ENTER key or ESC dl
and t"ggered from the
computer
On€' Unprot€'cteo F",IO
or Multiple UnprOl€'ct€'O
FElds
(In
Pagfll will
be transmitted as a
single bloclo..
A complete lin€, or Page
WIll be trar,smltted
as a Slngl€' blOCk
STRAPPED FOR LINE
STRAPPED FOR PAGE
non-FORMAT
0
data is transferred from the current cursor position
0
data is transferred from the current cursor position
MODE
to the end of the line or to a Record Separator
to the end of the terminal's allocated memory or to
(RS) control character, whichever occurs first.
the next RS, whichever occurs first. Thus the
Block to be transferred could be several
0
imbedded control characters are transmitted.
lines of information.
If present, the RS character is sent.
0
imbedded control characters are transmitted,
0
the Block is terminated by the transmission of a
If present, the RS character is sent.
CR(LF), a Carriage Return and Line Feed if
AUTO LF is depressed. (A local CR(LF) is exe-
0
if multiple lines are in the Block, they are sepa-
cuted to reposition the cursor; if no more informa-
rated by CR LF in the transfer. The Block is
tion is present at or beyond the cursor the trans-
terminated by the transmission of an RS.
mission consists of RS CR(LF).)
FORMAT
0
only information in Unprotected Fields is trans-
0
only information in Unprotected Fields is trans-
MODE
mitted. If the cursor is not in an Unprotected
mitted. If the cursor is not in an Unprotected
Field it will be forwarded to the next one or RS
Field it will be forwarded to the next one or RS
CR(LF) will be transmitted if no such field exists.
will be transmitted if no such fields exist. Data
Data is transmitted from the cursor position to the
found in Unprotected Fields is transmitted from
end of the Field or an RS, whichever occurs first.
the cursor until an RS or the end of memory is
Thus the Unprotected Field to be transferred
encountered.
could be longer than one line in length.
0
imbedded display control characters are not
0
imbedded display control characters are not trans-
transmitted. If present the RS character is sent.
mitted. If present, the RS character is sent.
0
a Unit Separator (US) control character (or RS
0
the Block is terminated by the transmission of a
character for mUltipoint) is transmitted between
CR(LF) and the cursor is forwarded one charac-
each Unprotected or Transmit Only field. The
ter position.
~Iock
is terminated by the transmission of an RS.
Note: In Multipoint configurations the Group Separator character (GS) is used in place of RS.
5-10
Figure 5-4. Block Mode Operation
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