Kohler EKOZD Series Service page 230

Fuel Level
D
The Generator Start/Stop Order is selected
automatically by the controller based on the fuel level
measured by each generator. In this mode, the
generator with the highest fuel level (as measured in
percentage) will be assigned the lowest order
(starting first, stopping last), with each sequential
order number being assigned to generators of
decreasing fuel level. The intent is to equalize fuel
level between the units.
If the generator system is supplying the load,
Generator Management implements a Fuel Level
Threshold to avoid starting and stopping generators
every time the fuel level changes (which could
happen frequently if the fuel is moving). The Fuel
Level Threshold is added to the fuel level of
generators that are running (for the purpose of
comparison), preventing
starting and stopping of generators.
If all the generators are running, the Order re-sorts
automatically any time the fuel level of a lower order
generator drops below the fuel level on a higher order
generator. This will not typically occur while all
generators are running, as they will all be using fuel at
the same relative rate (if the tanks are sized
appropriately for each generator).
If a generator starts because the load increases, the
Order may re-sort as soon as it connects to the
paralleling bus, hence the fuel level will be equalized
before the difference reaches the threshold.
Fuel Level Control mode is intended to equalize fuel
level in a system of generators where each generator
has a separate fuel tank—it is intended to prevent the
case where one generator runs out of fuel while the
others have plenty.
Range: Invalid = 0, Manual Fixed = 1, Runtime = 2,
Fuel Level = 3
Default: Runtime
230 Section 12 Paralleling System Information
excessively frequent
Enabled
This permits disabling all Generator Management
features. When Generator Management is disabled, a
generator will not alert the user of a Generator
Management configuration mismatch. Any generators
in the paralleling system with Generator Management
disabled will run if they are in auto and are receiving a
start signal (they will not stop if they are not needed).
Nodes with Generator Management enabled may still
see a configuration mismatch if a disabled node is
configured differently.
Range: False-True
Default: False
Order
The Order that a generator will start and stop in the
Generator Management sequence—Higher orders
start last and stop first. This parameter is only adjustable
in Manual Mode.
The Order of each of the generators in the paralleling
system must be different for Generator Management to
function. Generator Management will attempt to correct
an order conflict, but can only do so to a limited extent.
If a generator controller is powered down or
disconnected from the communications network, the
remaining controllers will attempt to re-sort the order so
that each generator has a unique and sequential
Order—the re-sort is not always successful in manual
mode.
It is important to verify the Start/Stop Order of each
generator if power is cycled to one or more generators in
a paralleling system where Generator Management is
used in manual mode.
Range: 1-8
Default: *Depends on Power-up sequence and Ser #
TP-6953 7/19