Installation manual
DATA
LOGGING
(TROUBLESHOOTING
AID)
Stepper Pos (steps)
The
throttle
shaft
is
controlled
by
a
stepper
motor.
The
value
displayed
is
in
steps.
Zero
steps
being
the
closed
position.
Most
units
will
run
at
no
load
in
the 20 to 30 steps
rllnge.
These
values
will
vary
from
engine
to
engine.
PulseWi.dth
This
is
the
fueling
duration in milliseconds
(ms).
The
value
will
be
lower at
no
load
than
at
full
load.
Main Fuel Comp
(%)
This
is
the
fueling
compensation that is derived
from
a value
in
the
fuel
table,
which
is
based
on
the
engine
rpm
and
the
MAP
pressure.
Air
Temp
and
Engine
Temp
Comp
(%)
This
is
the
fueling
compensation
based
on the
air
temperature
and
engine
temperature.
This
value
can
be
both
positive
and
negative.
This
value
is
added
or
subtracted
from
the
Main
Fuel
Compensation
value.
Speed P, I & D Terms
These
values
reflect
the
engine
speed
governing
process.
These
values
are
constantly changing
and
it is
very
hard
to
get
any
information
from
them.
The
only
thing I
can
say
on
the subject
is
that you
should
see
these
values
constantly
changing.
If
for
some
reason there
are
all
zeroes
in
these
columns
than
the
engines
is
probably
not
running.
Da-rated P Term
The
code
provides
for
the
P
(Proportional)
Term,
in
the
Speed
PID
control,
to
be
de-rated right
after
start-up
for
a short
period
of
time.
This
allows
the
engine
to
warm
up
with
out
having
an
aggressive
P
value
which
could
cause "hunting" or instability
when
the
engine
is
cold.
On
some
older
units
there
is
also
a
trim
pot
on the
top
on the
ECU
that
can
manually
de-rate
the
P
value.
This
will
be
reflected
in
this
box.
Frequency Option
This
is
the
value
of the
speed
selector
on
the
ECU,
whether
it
is
50
or 60Hz.
Some
interfaces
may
not
show
this
column
but
will
display
the
Frequency
Option
in
the Title area at
the
top
on
the
data
log.
Gen. Frequency
The
Generator
Frequency
is
a function of
engine
speed.
For
most applications,
50
Hz
operation
is
with
an
engine
speed
of
1500
tpm,
while
60Hz operation
is
with an.engine speed of
1800
tpm.
Note:
Belt
driv~
applications
will
be
different,
check
your
owner's
manual
for
engine
speed.
Engines & Generators
34