Yaskawa iQpump Controller Programming Manual - Manual (Page 236)

236 YASKAWA TM.iQp.07 iQpump Controller Programming Manual
Setting P9-04 to “3: FIFO @ Sleep” acts the same as P9-04 =1 except alternation is only requested when the drive is in Sleep Mode.
The new lead drive is selected using parameter P9-01.
Figure 1.175
Figure 179. Alternation Mode is FIFO Auto
PumpNet Control 1 U1-xx bit 1:
Run as Lag Drive
PumpNet Control 1 U1-xx bit 2:
Run as Lead Drive
PumpNet Control 1 U1-xx bit 1:
Run as Lag Drive
PumpNet Control 1 U1-xx bit 2:
Run as Lead Drive
PumpNet Control 1 U1-xx bit 1:
Run as Lag Drive
PumpNet Control 1 U1-xx bit 2:
Run as Lead Drive
Drive 1
Drive 2
Drive 3
Alternation Timer P9-03
PumpNet Status 1 U1-xx bit 6:
Request for FIFO Auto Alternation
PumpNet Status 1 U1-xx bit 6:
Request for FIFO Auto Alternation
PumpNet Control 1 U1-xx bit 1:
Run as Lag Drive
PumpNet Control 1 U1-xx bit 2:
Run as Lead Drive
Drive 4
PumpNet Status 1 U1-xx bit 6:
Request for FIFO Auto Alternation
PumpNet Status 1 U1-xx bit 6:
Request for FIFO Auto Alternation
Alternation Timer P9-03
Network Processing
& Delay
Network Processing
& Delay
Drive 1 is the
First Pump
Drive 2 is now the First Pump
Drive 4 runs when the Drive 3
requests for a new lead drive
Drive 3 is now the First Pump
System demand did not
require an additional pump to
replace the drive that was
removed