Woodward EGCP-2 - Figure 5-18. Changing the Priority of a Slave Unit; Figure 5-19. Changing the Priority of a Slave Unit

EGCP-2 Engine Generator Control Package Manual 26174
144 Woodward
Above figure represents system on load on an isolated bus in load sharing. The
master unit has sequenced on the priority 2 slave unit. System load is at 50%.
MAINS
MAINS FAILURE DETECTED
OR RUN WITH LOAD AT MASTER
NEXT ON
G
NETWORK ADDRESS #1
NETWORK PRIORITY #1
NEXT OFF 2
NETWORK PRIORITY #3
NETWORK ADDRESS #2
G
ADDRESS: 1 2 3
MASTER 1
MASTER SEQUENCING SCREEN
OPER. X X X
PRIORITY 1 3 2
SYSTEM LOAD = 50%
NETWORK PRIORITY #2
NETWORK ADDRESS #3
G
VIS-123
00-04-27
Figure 5-18. Changing the Priority of a Slave Unit
The network priority of the priority 2 and 3 units are switched so now the unit with
network address #3 is priority 2, and network address #2 is priority 3. After a time
delay of less than 5 minutes, the #3 network address (priority 2) unit is started by
the master and paralleled to the bus. Now all three units are on line. See Figure
5-18. The master recognizes the proper on/off sequence for the new priority
settings, and will sequence off network address #2 unit when system load levels
fall below 25%. See Figure 5-19.
MAINS
MAINS FAILURE DETECTED
OR RUN WITH LOAD AT MASTER
NEXT ON 2
G
NETWORK ADDRESS #1
NETWORK PRIORITY #1
NEXT OFF 3
NETWORK PRIORITY #3
NETWORK ADDRESS #2
G
ADDRESS: 1 2 3
MASTER SEQUENCING SCREEN
OPER. X X X
MASTER 1
PRIORITY 1 3 2
SYSTEM LOAD = 50%
NETWORK PRIORITY #2
NETWORK ADDRESS #3
G
VIS-124
00-04-27
Figure 5-19. Changing the Priority of a Slave Unit