8 Generac
®
Power Systems, Inc.
ANALOG INPUT SCALING FACTORS
The two user-defined analog inputs can be scaled so
that the display uses meaningful values rather than the
voltage level at the input. The user enters the value to
be displayed when the input voltage is zero and when it
is at the maximum value. (An analog input to the E
panel is a voltage sourced input with a zero- to 10-volt
range.) All alarm settings are based on this scaling, and
the instrumentation display shows the input value
based on this scaling too.
ANALOG INPUT MESSAGES
This is a message up to 24 characters long that is dis-
played on the instrumentation display when the cor-
responding value is being shown.
ANALOG INPUT ALARM MESSAGES
There is a user-definable message for each alarm
condition on each analog input. This message is
shown on the alarm display when the alarm condi-
tion is active and is stored in the alarm log.
ANALOG INPUT ALARM SETTINGS
Each analog input has two alarms associated with it.
One is activated when the input value is higher than
the high set-point, and the other is active when the
input is lower than the low set-point. The user also
can define when the alarm is active (or disable it) and
the severity of the alarm (from simply displaying a
status message to shutting down the generator – see
“Alarm Processing” on Page 5).
DIGITAL INPUT ALARM SETTINGS
Each digital input also can generate an alarm. The
user can program the alarm message, the input state
that generates the alarm, when the alarm is active,
and the alarm type. A digital input to the E panel is
NOT a voltage sourced input, but a dry contact clo-
sure to ground. Voltage never should be sourced to a
digital input. The signal options to a digital input are
as follows:
• Open: This signal is an open circuit.
• Closed: This signal is a contact closure to ground.
OIL PRESSURE ALARMS
The oil pressure input has two associated alarm
functions. The pre-low oil pressure warning is a non-
latched, hold off alarm with a user-definable set-
point. The low oil pressure shutdown is a shutdown,
hold off alarm with a user-definable set-point. The
shutdown alarm set-point should be the lowest of the
two settings so that the user will have some warning
of a low oil condition before the generator is shut
down.
OIL TEMPERATURE ALARMS
The oil temperature has a non-latched warning and a
shutdown alarm associated with it. The set-points are
programmable, and the alarms can be immediate,
hold off or disabled.
COOLANT TEMPERATURE ALARMS
The coolant temperature input has three associated
alarms. The pre-high coolant temperature alarm is a
non-latched, hold-off alarm. The high coolant tem-
perature alarm is a shutdown, hold-off alarm. The
low coolant temperature warning is a non-latched,
always active alarm. Set-points for each alarm are
programmable.
BATTERY VOLTAGE ALARMS
The low battery voltage warning set-point is pro-
grammable. The warning will be activated if the bat-
tery voltage is below this value for more than five
minutes. This is a non-latched, always active alarm.
Note that the “Power” LED on the front panel is extin-
guished immediately if the battery voltage is less than
this value. The high battery voltage alarm set-point is
also programmable. The warning is active immedi-
ately when the battery voltage is higher than this
value.
ENGINE SPEED ALARMS
The user can program the overspeed and the under-
speed alarm. The overspeed alarm is an immediate
shutdown alarm. Underspeed is a hold off alarm that
can either be non-latched, latched or shutdown.
GENERATOR VOLTAGE ALARMS
An alarm can be generated for high voltage and low
voltage. The set-points are user-definable, and the
alarms can be either non-latching, latching or shut-
down.
GENERATOR FREQUENCY ALARMS
An alarm can be generated for high frequency and
low frequency. The set-points are user-definable, and
the alarms can be either non-latching, latching or
shutdown.
FUEL LEVEL ALARMS
Alarms can be generated by an optional fuel level sen-
sor. The high fuel level warning is non-latching. There
is also a low fuel level warning that is non-latching
and a low fuel shutdown alarm. Each of these alarms
has a set-point and can be always active or disabled.
Section 1 — General Information
E Option Control Panels
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