Blue Ribbon BB4000, Instruction Manual, Page: 21 / 67

15
Model BB4000 Controller Instruction Manual
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7. a
lternatIon
s
equence
M
ode
7.1. Standard Alternation Parameter P.16=1
NOTES:
1. Unless there is some special circumstance that requires a more
complicated pump call sequence, this is the sequence that should be
used.
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.
7. A Discrete Input programmed for External Alternation (Function 6)
may be used to force alternation. When this feature is used, Auto-
matic Alternation would normally be disabled by setting Parameter
P.18 to Disabled.
8. If connected to a SCADA system, alternation may be initiated by mo-
mentarily setting Coil 136, or by forcing the lead pump by writing to
Register 40022 (Same as Parameter P.39).
9. Parameter P.51 may be used to select and setup Time Based Alterna -
tion.
7.2. Pump 1 Always Lead
Stays On With Other Pumps Parameter P.16 = 2
NOTES:
1. This sequence is used when it is required that pump 1 always be lead
pump. This sequence keeps pump 1 on, when the other pumps are
called to run.
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 among pumps 2-4.
7. If pump 1 is disabled another pump will be called in its place.
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
momentarily 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 Alterna -
tion.