16
Model BB4000 Controller Instruction Manual
7.3. Pump 1 Always Lead
Turns Off With Other Pumps On Parameter P.16 = 3
NOTES:
1. This sequence is used when it is required that pump 1 always be lead,
and when it must be turned off when another pump(s) comes on. When a
pump from the second group is required, pump 1 is first turned off, then
after the Lag Pump Delay, the other pump is turned on.
2. For Triplex and Quadraplex applications, Parameter P.17 must be used to
select either First On Last Off or First On First Off.
3. Discrete Inputs programmed as Pump 1-4 Disable inputs may be used to
disable pumps.
4. For Triplex and Quadraplex applications, Discrete Inputs programmed as
Call Pump 2-4 Last inputs may be used to assign pumps to standby status.
5.
For Triplex and Quadraplex applications, Discrete Inputs programmed as
Sequence Inputs 2-4 may be used to set the lead pump.
6. For Triplex and Quadraplex applications, Parameter P.39 may be used to
set the lead pump.
7.
If pump 1 is disabled, another pump will Not be called in its place. The
1st Pump On/Off Level parameters are dedicated to pump 1 and will not
call another pump.
8. A Discrete Input programmed for External Alternation (Function 6) may be
used to force alternation. When this feature is used, Automatic Alternation
would normally be disabled by setting Parameter P.18 to Disabled.
9. If connected to a SCADA system, alternation may be initiated by momen-
tarily setting Coil 136, or by forcing the lag pump by writing to Register
40022 (Same as Parameter P.39).
10.
Parameter P.51 may be used to select and setup Time Based Alternation.
7.4. Split Alternation Parameter P.16 = 4
NOTES:
1. This sequence is used when it is required that pumps be alternated in two
separate groups.
2. Parameter P.17 must be used to select either First On Last Off or First On
First Off.
3. Discrete Inputs programmed as Pump 1-4 Disable inputs may be used to
disable pumps.
4. Discrete Inputs programmed as Call Pump 1-4 Last inputs may be used to
assign pumps to standby status.
5.
Discrete Inputs programmed as Sequence Inputs 1-4 may be used to set
the lead pump.
6. Parameter P.39 may be used to set the lead pump of group #1.
7. If pumps from group 1 are disabled, then pumps in group #2 may be
called to take their place.
8. A Discrete Input programmed for External Alternation (Function 6) may be
used to force alternation of Group #1. When this feature is used, Auto-
matic Alternation would normally be disabled by setting Parameter P.18 to
Disabled.
9. If connected to a SCADA system, alternation of Group #1 may be initiated
by momentarily setting Coil 136, or by forcing the lead pump position by
writing to Register 40022 (Same as Parameter P.39).
10.
Parameter P.51 may be used to select and setup Time Based Alternation of
Group #1.