Load Sharing - Woodward easYgen-2000 Series User Manual

Interfaces And Protocols

Load Sharing

7.7 Load Sharing
General information
Measures to reduce the bus load
Load diagnosis
470
The Modbus RTU response time can increase under
certain conditions:
– Display refresh of easYgen-2200/2500 without
CAN (J1939 protocol) connected -> max. 2 sec‐
onds
Display refresh of easYgen-2200/2500 with CAN
–
(J1939 protocol) connected -> max. 3 seconds
Woodward recommends to make a break time of 10
ms after receiving the data of the last Modbus request.
The maximum number of participating easYgen-2000 Series
devices for load sharing is 16. The CANopen bus load increases
with the number of units participating in load sharing.
The following parameters affect the bus load:
Number of CAN participants
n
Baud rate
n
Transfer rate of load share messages
n
Visualization
n
We recommend to consider whether all data has to be sent on the
CAN bus when planning the CAN bus. It is also possible to send
visualization data via RS-485 for example.
If you need to reduce the bus load of the load share CAN bus, the
following measured may be used:
Increase the baud rate (parameter
n
sideration of the bus length (refer to
length" on page 81 ).
Reduce the transfer rate of the load share message (param‐
n
eter 9921 Ä p.
Reduce the transfer rate of the visualization message, i.e. the
n
event timer (parameter
Disable the transmission visualization data on the CAN bus
n
and use the RS-485 interface to transmit visualization data.
Disable SYNC message (parameter
n
TIME message (parameter
heartbeat time SYNC message (parameter
possible.
Multiple units on the CAN bus may cause a high bus load
depending on the used protocols and baud rate.
The easYgen provides a diagnosis screen to monitor the actual
load on the CAN bus.
To access the screen navigate to
CAN Load diagnostic" .
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