ALTERNATION SEQUENCE MODE
STANDARD ALTERNATION Parameter P.16 = 1
11
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, Automatic Alternation
would normally be disabled by setting Parameter P.18 to Disabled.
8. If connected to a SCADA system, alternation may be initiated by momentar-
ily 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 Alternation.
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 momentar-
ily 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.
PUMP 1 ALWAYS LEAD
Stays On With Other Pumps Parameter P.16 = 2
Movement of Lead Pump Upon Alternation
To Next Page
Loading...