Kohler EKOZD Series Service page 216

12.4.13 Communication Failure
When a PGEN node fails to reply for 30 consecutive
frames (about one second) the other nodes will detect a
loss of communication with it and will default to droop
sharing and time slice based first-on logic. Not all
applications are configured or able to use this functionality.
12.5 Calibration and Commissioning
12.5.1 Voltage Calibration
The Decision-Makerr
factory-calibrated direct-sensing paralleling controller. It
is capable of reading up to 800VAC (RMS) accurately,
allowing it to directly sense the output voltage in most
low-voltage applications.
The voltage sensing is calibrated in the factory—no
calibration is required unless a personality profile from a
different controller is loaded over the factory calibration
values.
If a personality profile is updated, the calibration factors
for all 9 voltages (L1-L2, L2-L3, L3-L1, L1-L0, L2-L0,
L3-L0, Bus L1-L2, Bus L2-L3, Bus L3-L1) should be
recorded from the new controller so that they can be
restored after the personality is loaded.
Calibration is possible in-application, but should only be
necessary if the factory defaults are lost or overwritten.
12.5.2 Current Calibration
The current metering is calibrated at the factory for a
given generator. It is performed at full load at the factory.
There is a small variation in the output ratio of a CT over
its supported measurement range, so this reading may
vary slightly at lower loads.
If a controller is replaced, the current metering will have
to be calibrated in order to guarantee power metering
accuracy.
12.5.3 Gains and Settings for Paralleling
The Decision-Makerr 3500 controller is preset with
factory defaults for each generator model number in the
personality profile. These gains should perform
adequately for most applications, but it may be
necessary to perform adjustment of advanced settings.
216 Section 12 Paralleling System Information
3500 controller is
12.6 Parameter Descriptions
Individual descriptions of the functionality of each
parameter within the paralleling logic.
12.6.1 PGEN
PGEN is an auto-discovering, scheduled protocol that
provides the
inter-controller communication. PGEN stands for
Paralleled Generator.
PGEN Baud Rate. The PGEN Baud rate is set at the
a
factory to 57,600. It should only be changed under
instruction from a factory representative. All nodes must
have an identical baud rate for the network to
communicate effectively.
Range: 9600/19200/38400/57600/115200
Default: 57600
PGEN Node ID. The Node ID is an address (allocated
timeslice) that has been assigned to this node. The node
ID is typically indicative of power up sequence, but not
always. All node IDs behave identically on the network,
the address
communication.
Range: 1–8 or 255 (indicates short circuit on PGEN Wires)
Default: **STATUS**
PGEN Nodes Connected. The number of PGEN nodes
that this node has seen communicating on the network
in the last second.
Range: 1–8
Default: **STATUS**
PGEN Nodes Disconnected. The number of PGEN
nodes that have stopped replying at the appropriate
time. If a node with the same controller serial number as
a disconnected one begins communicating again after
being counted as disconnected, the disconnected node
count will decrease again.
Note: Removing battery power from a controller is not
the same as losing communication with that
controller—the disconnected node count does
not increase in the case of removal of the battery
from one controller on the network.
Range: 0–7
Default: **STATUS**
infrastructure for
only determines the
time-critical
order of
TP-6953 7/19