Yaskawa iQpump Controller Programming Manual - Manual (Page 257)

YASKAWA TM.iQp.07 iQpump Controller Programming Manual 257
Figure 1.192
Figure 196. P9-20, P9-21 and P9-24 Interaction Example
Table 122 Parameters
◆ MEMOBUS / Modbus Interaction with other iQpump Functions
Function Description <0034>
All functions will work as before when P1-01
≠
3. The functions listed below will behave slightly different when P1-01 = 3.
• Start Level: Active on the first pump in the network. Drives that are in the process of Alternation will not undergo this process.
• Sleep: Active when the drive is the only drive running on the network.
• Over-cycle Protection: Active when the drive is the only drive running on the network.
• No-Flow Detection: Active on the lead drive. When No-Flow is confirmed, the lead-drive is de-staged, or if it is the only drive left, it
goes to sleep.
• Pre-charge: Active only on the first drive to run in the network.
• Low City Pressure: Active on any drive in the network. An alarm condition will cause other drives in the network to stop running and
show a “Net Pump Err” message.
• Utility Delay: When this function is active the drive is unavailable to the iQpump MEMOBUS / Modbus Network and will force the
U1-01 text to show “Pump Off Network”.
Parameter
No.
Addr.
Hex
Parameter Name
Digital Operator Display
Description Range Default
Menu
Location
P9-20 0893
Allow Network Run
Allow Net Run
Specifies when a network run command is allowed:
0: Always
1: First / Alternation
2: First Only
3: Alternation Only
0 ~ 3 0 Programming
P9-21

0894
Run Priority
Run Priority
Sets the Lead Drive selection priority overriding the P9-01 selection.
If multiple drives have the lowest P9-21 value, then P9-01 determines
which drive becomes the Lead.
1 ~ 16 8 Programming
P9-24

0897
Lead Swap @ Sleep
Lead Swap @ Sleep
When the Lead DRive has been in Sleep for this amount of time and
there is another drive available with a lower P9-21, then this drive
will request for a swap.
A setting of 0 disables this function.
0 ~ 7200 s 0 s Programming
 Denotes that parameter can be changed when the drive is running.
Drive 1
Drive 2
Drive 3
U1-13 = 21H
P9-05 = 0 (Fixed Speed)
P9-20 = 0 (Always)
P9-21 = 6
P9-24 = 120s
U1-13 = 30H
P9-05 = 2 (Turn Off )
P9-20 = 2 (First Drive Only)
P9-21 = 3
P9-24 = 0s
Start-up…
Drive 1 is the
First Pump
P9-01 = 1 (Lowest Run-time)
U1-13 = 4H
P9-05 = 0 (Fixed Speed)
P9-20 = 0 (Always)
P9-21 = 6
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
-
Sleep
Sleep
When
Drive 3 is
staged,
Drive 1
turns off
Only
Drive 2
is
available
as Next
Lead
Drive 2 is no
longer needed
and gets
de-staged
Drive 3 has
been in Sleep
for 120s and
Lead is switched
back to Drive 1
because of the
P9-21 level
iQpump
iQpump
iQpump