Pump control reference
B.8 Alternate Duty Backup
HydroRanger 200 HMI
Operating Instructions, 06/2018, A5E36281317-AC
317
B.8
Alternate Duty Backup
Relay function (2.8.1.4.) (Page 195) =
Alternate Duty Backup alternates the lead pump each
time the material level cycles.
Relay operation
(for Relay logic (2.8.1.11.) (Page 199) = Positive)
The setpoints associated with the relays are grouped so that they can be rotated. Setpoint 1
does not relate directly to Relay 1. The pumping algorithm manages the mapping of
setpoints to relays. When pumps are run, they can RUN only one at a time.
Relay table
Cycle 1
Index
Relays
Setpoints
1
2
3
ON 3
OFF
OFF
ON
ON 2
OFF
ON
OFF
ON 1
ON
OFF
OFF
OFF
OFF
OFF
OFF
Cycle 2
Index
Relays
Setpoints
1
2
3
ON 3
ON
OFF
OFF
ON 2
OFF
OFF
ON
ON 1
OFF
ON
OFF
OFF
OFF
OFF
OFF
Cycle 3
Index
Relays
Setpoints
1
2
3
ON 3
OFF
ON
OFF
ON 2
ON
OFF
OFF
ON 1
OFF
OFF
ON
OFF
OFF
OFF
OFF
Summary of Contents for HydroRanger 200 HMI
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