Types
Modbus
registers
Remarks
ANALOGMANAGER
7
Big-endian is used for AnalogManager because it is the
regular format for Modbus
TEXT/X
X/2
Table 131: Data types
The Modbus RTU response time can increase under certain conditions (display versions /
plastic housing only):
• without CAN (J1939 protocol) connected -> max. 2 seconds
•
• 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.
7.7
Load Sharing
General information
The maximum number of participating easYgen-3000XT Series devices for load sharing is
32. Both CAN and Ethernet interfaces can handle load share. Load share via Ethernet
interface uses UDP broadcast messages.
Multi-master principle
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 circuit or generator group breaker.
Load share timeouts
The easYgen provides different timeout events to monitor a lost of loadshare messages. A
lost of single loadshare messages may happen through bad connections, too much traffic
on the bus or any other disturbances.
In general a timeout event occurs if no loadshare message was received for a configured
timeout. An entry in the Event History is shown and the according LogicsManager flag
goes TRUE, see listed below. With parameter Load share timeout event set to Off the
timeout events will not show up in the Event History.
The timeout depends on the configured »Load share interface «
and the related
parameters, as follow:
• CAN: Timeout =
•
• ETHERNET A: Timeout =
•
846
easYgen-3000XT Series
B37574
7 Interfaces And Protocols
7.7 Load Sharing
Released