Specifications
Page
5-1
1770-805
Section 5
MODE SEL,ECTION
5.0 GENERAL
All
Industrial
Terminal
Systems
can
operate
in
an
Alphanumeric
mode
and
one
or
more
Processor
modes. In
addition,
all
Industrial
Terminal
Systems
can
operate
in a
Monitor
mode
when
the
keyboard
is replaced
by
a
keyboard
connector
cover.
When
the
Industrial
Terminal
System is
turned
ON,
self-diagnostic
checks
are
performed.
When
no
problems
are
found
and a
keyboard
is
attached,
either
a
Processor
mode
or
Alpha-
numeric
mode
can be selected.
The
1770-T4
Industrial
Terminal
System
allows
either
auto-
matic
or
manual
mode
selection
after
fault-
free
diagnostics
are
performed
at
power
up.
Mode
selection
with
1770-T1, -T2,
and
T3
Industrial
Terminal
Systems
is
performed
manually.
If
a
problem
is
detected
during
power
up
of
any
Industrial
Terminal
System, a
diagnostic
fault
prompt
and
continuous
beep
tone
are
generated.
5.1
MONITOR
MODE
When
the
keyboard
connector
cover
is
at-
tached
and
fault-free
diagnostics
have been
performed,
the
Industrial
Terminal
System
automatically
enters
the
Monitor
mode. In
this
mode,
the
Industrial
Terminal
System
func-
tions
as a
data
terminal
that
can
only
receive
ASCII
characters
through
Channel
B.
If
lower
case
ASCII
characters
are
received,
their
upper
case
equivalents
will
be displayed.
The
baud
rate
and
parity
switch
settings
for
the
Industrial
Terminal
System
(Section
3.6)
must
match
the
baud
rate
and
parity
of
the
data
received
on
Channel
B.
5.2
MODE
SELECTION WITH A T1, T2, OR T3
SYSTEM
The
operating
modes
for
the
1770-T1, -T2,
and
-T3
systems
are
selected
in
the
same
manner
from
a
mode
selection
menu.
After
fault-free
diagnostics
have been
performed
at
power
up,
or
when
the
[MODE
SELECT]
key
on
the
keyboard
is pressed, a
MODE
SELEC-
TION
menu
will
be
displayed
on
the
screen.
This
menu
identifies
the
keyboard
that
is
attached
and
lists
the
operating
modes
and
keytop
overlays
that
can be used
(Figure
5-2).
Note
that
the
1770-T3
Mode
Selection
menu
identifies
the
Processor
connected
to
Chan-
nel A
by
intensifying
its
name
on
the
screen.
To
select
the
desired
mode,
install
the
proper
keytop
overlay
and
enter
the
appropriate
two-
digit
number.
When a
Processor
mode
is selected,
the
Indus-
trial
Terminal
System
is used
to
enter,
edit,
and
monitor
ladder
diagram
instructions.
In
addition,
report
generation
for
PLC-2
family
Processors
is
performed
in
this
mode.
Infor-
mation
on
the
instruction
set
and
report
generation
for
the
various
Processors
is
found
in
the
appropriate
Processor
documentation.
When
Alphanumeric
mode
is selected,
the
Industrial
Terminal
System
is used as a
data
terminal.
ASCII
code
can be
transmitted
to
or
from
a
modem,
computer
or
other
RS-232-C
device
using
Channel
B.
Report
generation
tor
PLC
Processors
is also
performed
in
this
Keyboard
Connector
Cover
(Cat. No.
1770-XB)
FIGURE
5-1-
Keyboard
Connector
Cover
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