Specifications
Page
6-4
1770-805
TABLE
6-1
-ASCII
(American
Standard
Codes
for
Information
Interchange)
BITS
4231 000
001
010
0000
NUL
OLE
SP
0001
SOH
DC1
!
0010
STX
DC2
,
0011
ETX
DC3
#
0100
EOT
DC4
$
0101
ENQ
NAK
%
0110
ACK
SYN
&
0111
BEL
ETB
'
1000
BS
CAN
(
1001
HT
EM
)
1010
LF
SUB
*
1011
VT
ESC
+
1100
FF
FS
'
1101
CR
GS
-
1110
so
RS
1111
Sl
us
I
[DELETE]-
Backspaces
one
character
and
deletes
the
character
last entered.
[SPACE]
- Generates
an
ASCII
SPACE
character.
[CANCEL
COMMAND]
-Generates
an
ASCII
ESCAPE
code.
[SHIFT]-
Allows
the
next
key pressed
to
be
a
shift
character.
[CTRL]-
Used
as
a part
of
a key sequence
to
generate a
control
code.
[MODE]
-
Terminates
all
functions
and
returns
the
Mode
Selection
Menu
to
the
screen.
6.2.2
ASCII
Control
Codes
The
ASCII
Control
Codes listed in
Table
6-2
can be
generated
from
alii
ndustrial
Terminal
keyboards
by
pressing
[CTRL]
and
another
key.
All
of
the
control
codes
are
transmitted,
but
only
a
few
are used
by
the
Industrial
Terminal
System. These include:
[CTRL][G]
-Generates
a beep tone.
[CTRL][H]
-
Generates
an
ASCII
BACK-
SPACE.
The
cursor
moves
one
position
to
the
left.
[CTRL][I]
-
Generates
an
ASCII
HORI-
011
(J
1
2
3
4
5
6
7
8
9
<
=
-----
~
?
BITS
765
100 101 110
111
@
p
'
p
A
Q
a q
B
R
b
r
c s
c s
D T d t
E
u
e u
F v f v
G w
g
w
H X h X
I
y
i y
J
z j z
K
[
k
{
L
\
I
I
M
l
m
}
N
n
~
A
0
-
0
DEL
ZONTAL
TAB.
A
horizontal
tab
is set at
every
eighth
position.
The
cursor
moves
to
the
next
preset
position.
[CTRL][J]
-
Generates
an
ASCII
LINE
FEED.
The
cursor
moves
down
one
line
in
the
same
column.
[CTRL][K]-
Generates
an
ASCII
VERTICAL
TAB.
Clears
the
screen
from
the
cursor
position
to
the
end
of
the
screen. Moves
the
cursor
to
the
top
left
corner
of
the
screen.
[CTRL][L]
- Generates an
ASCII
FORM
FEED.
Clears
the
entire
screen. Moves
the
cursor
to
the
top
left
corner
of
the
screen.
[CTRL] [M]
-
Returns
the
cursor
to
the
beginning
of
the
same line.
When
the
control
code
display
option
is set
ON
with
a 1770-T1,
-T2
or
-T3
system, a
control
code
entered
will
generate and
display
a
corresponding
two-letter
abbreviation
(See
Table
6-2).
The
control
codes
will
not
be
executed.
When
the
control
code
display
option
is set
ON
with
a 1770-T4 system,
only
the
control
codes
that
the
Industrial
Terminal
System
uses
will
generate
and
display
a
two-letter
abbreviation.
The
control
codes
will
not
be
executed.
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