Woodward easYgen-2000 Series User Manual page 471

Multi-master principle
Load share monitoring
Load share parameters
37535B
This screen provides information about the total CAN bus load as
well as the CANopen and J1939 bus load on CAN bus 1 and 2.
The total CAN bus load is the sum of the message load on CAN
bus 1 and 2. 22 messages on the CAN buses within 20 ms corre‐
spond with 100 % load.
If more than 21 messages are sent within 20 ms, the logical com‐
mand variable "08.20 CAN bus overload" will be enabled and the
busses will be disabled consecutively starting with the last in the
list (CAN1 bus load J1939) until the load falls below 22 messages
per 20 ms.
The reconnection of the busses is performed in the opposite order
starting with the first in the list (CAN2 bus load CANopen). The
easYgen also provides a monitoring function for initiating dedicated
actions in case the CAN bus load is exceeded (refer to
Ä Chapter 4.4.6.2 "CAN Bus Overload" on page 180 for detailed
information).
It is important to know that the load share and load-dependent
start/stop functionality is subject to a multi-master principle. This
means that there is no dedicated master and slave function. Each
easYgen decides for itself how it has to behave.
The benefit is that there is no master control, which may cause a
complete loss of this functionality in case it fails. Each control is
also responsible for controlling common breakers like a mains cir‐
cuit or generator group breaker.
The easYgen provides monitoring functions for load sharing:
Multi-unit parameter alignment
n
The multi-unit parameter alignment functionality requires that
the relevant parameters are all configured identically at all par‐
ticipating units. For additional information refer to
Ä Chapter 4.4.6.10 "Multi-Unit Parameter Alignment"
on page 187 .
Multi-unit missing members
n
The multi-unit missing members monitoring function checks
whether all participating units are available (sending data on
the load share line). For additional information refer to
Ä Chapter 4.4.6.11 "Multi-Unit Missing Members" on page 189 .
The following parameters are available for configuring the CAN bus
interfaces. Refer to
on page 322 for detailed information.
ID Text
9923 Load share Interface
9921 Transfer rate LS fast message
9920 Load Share CAN-ID
easYgen-2200/2500 | Genset Control
Interfaces And Protocols
Ä Chapter 4.6.3 "Load Share Parameters"
Setting range
CAN 1 / Off
0.10 to 0.30 s
2xx Hex / 3xx
Hex / 4xx Hex /
5xx Hex
Load Sharing
Default
value
CAN 1
0.10 s
5xx Hex
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