Appendix B: Pump Control Reference - Siemens HydroRanger 200 HMI Operating Instructions Manual

Appendix B: Pump control reference

The HydroRanger 200 HMI has the pump control strategies to suit nearly any water/
wastewater application. This section details these strategies for engineers requiring in-
depth knowledge of the system and how it operates.
Pump control options
The various methods of pump control are made up of a combination of two control
variables:
Pump duty
Indicates in what sequence pumps are started.
Pump start method
Indicates whether new pumps start and run with any currently running pumps (most
common) or whether new pumps start and shut off currently running pumps.
Pump groups
The HydroRanger 200 HMI groups pumps that use identical pumping strategies based on
the value of Relay Control Function (
pumps corresponds to one wet well or reservoir.
Pump by rate
To trigger pump starts by the rate of change in material level, use
New pumps are started, one at a time, until the rate setpoint (
2.3.10. Emptying Indicator
Pump control algorithms
Fixed
Starts pumps based on individual setpoints and always starts the same pumps in the
same sequence.
Alternate
Starts pumps based on the duty schedule and always leads with a new pump.
Service Ratio
Starts pumps based on user-defined ratio of running time.
Page 248 HydroRanger 200 HMI – OPERATING INSTRUCTIONS
2.8.1.4. Relay Function
) is reached.
). Generally, one group of
2.8.1.8. Pump by Rate
2.3.9. Filling Indicator
A5E36281317
.
, or