Kohler EKOZD Series Service page 255

Manual Mode Order Update Logic
Generator Management looks for two orders that are the
same, if they are, it finds the first available sequential
order and adjusts all generators with orders between the
conflicting order and the available order except any
units with a lock. A lock has the following requirements:
Has a conflict with another node and
D
was manually written, or
D
has the lowest controller serial number of the
D
conflicting controllers.
If the available position is higher than the conflicting
order, all generator controllers with orders between the
conflicting and available order are incremented,
otherwise the orders are decremented on the other
generator controllers.
Runtime Mode Order Update Required Logic
To determine if the order needs to re-sort, the order
selection logic will compute a minimum valid order and a
maximum valid order for this generator. If the existing
order is between the minimum and maximum, there is
no re-sort required. Otherwise, a re-sort is initiated.
Runtime Mode Order Update Logic
The order is computed by adding the runtime threshold
to all units that are not connected to the paralleling bus to
get effective runtime (including the runtime hour
threshold). Each controller determines where it should
fall in the sequence and sets the order to that value.
Conflicts in order are resolved the same way as they are
in manual mode.
Fuel Level Mode Order Update Required Logic
To determine if the order needs to re-sort, the order
selection logic will compute a minimum valid order and a
maximum valid order for this generator. If the existing
order is between the minimum and maximum, there is
no re-sort required. Otherwise, a re-sort is initiated.
TP-6953 7/19
Fuel Level Mode Order Update Logic
The order is computed by adding the fuel level threshold
to all units that are connected to the paralleling bus to get
effective fuel level (including the fuel level threshold).
Each controller determines where it should fall in the
sequence and sets the order to that value.
Conflicts in order are resolved the same way as they are
in manual and runtime mode.
13.6.2 Start/Stop kW Calculation
The Start kW for a generator is determined by summing
the total capacity of all available generators with a lower
order number than this one and multiplying it by the Start
Percentage.
The Stop kW for a generator is determined by summing
the total capacity of all available generators with a lower
order number than this one and multiplying it by the Stop
Percentage.
Note: The Start and Stop kW for Order 1 are always set
to 0kW (never stop, always start). Order 2 is set to
0kW if the Minimum Gens Online is set to 2.
13.6.3 Activation Logic
The Stable Timer is latched to run if all of the start
conditions are true, the timer will continue to run even if
some of the start conditions become false, as long as
none of the reset conditions are true.
13.6.4 Start/Stop Logic
The Generator Management Stop Logic is very simple,
a Generator Management stop is sent if all of the
following conditions are true:
The Stop Accumulator is full.
D
The Start Accumulator is empty.
D
Generator Management is stable (the stable timer
D
has expired).
All lower order generators are either connected to the
D
paralleling bus or not available.
Section 13 Generator Management Information 255