Programming
Guide
40
Marathon
Series
FA/FR
Example:
Send
E=0.90
instead
of
E=0.9;
send
P=001.2
instead
of
P=1.2
After
transmitting
one
command,
the
host
has
to
wait
for
the
response
from
the
unit
before
sending
another.
A
response
from
the
sensor
is
guaranteed
within
4
seconds
in
Poll
mode
and
8
seconds
in
Burst
mode
at
300
baud.
The
response
is
faster
at
higher
baud
rates.
An
asterisk
*
will
be
transmitted
back
to
the
host
in
the
event
of
an
“illegal”
instruction.
An
illegal
instruction
is
considered
to
be
one
of
the
following:
•
Any
non
‐
used
or
non
‐
allowed
character
(unknown
command)
•
An
“out
‐
of
‐
range”
parameter
value
•
A
value
entered
in
the
incorrect
format
(syntax
error)
•
Lower
case
character(s)
entered
(all
characters
must
be
upper
case)
9.3
Transfer
Modes
The
protocol
allows
the
use
of
two
different
modes:
the
Poll
Mode
and
the
Burst
Mode
9.3.1
Poll
Mode
The
current
value
of
any
individual
parameter
can
be
requested
by
the
host.
The
unit
responds
once
with
the
value
at
the
selected
baud
rate.
Additionally,
the
user
‐
defined
output
string
can
be
polled.
9.3.2
Burst
Mode
The
unit
transmits
the
user
‐
defined
output
string
(continuously,
at
the
selected
baud
rate),
which
may
contain
all
of
the
parameters.
Parameters
may
also
be
polled
for
while
the
instrument
is
in
burst
mode.
The
poll
string
will
be
inserted
in
the
burst
‐
mode
stream.
The
sensor
transmits
the
parameters
in
a
fixed
order,
regardless
of
the
order
in
which
they
are
specified.
This
order
is
as
follows:
1.
Temperature
unit
2.
Target
temperature
3.
Power
4.
Emissivity
5.
Peak
hold
time
6.
Average
time
7.
Mode
(Setup/Fast)
8.
Internal
temperature
9.
Temperature
setting
for
20
mA
10.
Temperature
setting
for
0
mA
/
4
mA
11.
Output
current
(specified
values,
in
mA,
or
controlled
by
sensor)
12.
Multidrop
address
13.
Trigger
status
14.
Multidrop
address
15.
Initialization
flag
The
following
items
cannot
be
placed
in
the
burst
output
string:
•
Poll/Burst
Mode
•
Baud
rate
•
Manual
Lockout/Unlock