Siemens HydroRanger 200 HMI - Optional Pump Controls; Starting Pumps by Rate of Level Change

Operating
7.9 Pump control
HydroRanger 200 HMI
Operating Instructions, 06/2018, A5E36281317-AC
125
7.9.4
Optional pump controls
7.9.4.1
Starting pumps by rate of level change
Use this function when multiple pumps will be controlled by rate of level change rather than
setpoints. Pumping costs can be reduced because only the highest ON setpoint needs to be
programmed. This results in a lower difference in head to the next wet well which, in turn,
results in less energy being used to pump out the well.
Parameter
Index
Mode/Value
Description
ON Setpoint (2.8.1.5.) (Page 197)
1
1.35
Starting pumps by rate allows all
setpoints to be set higher, to save
money by pumping from the highest
safe level of the wet well.
ON Setpoint (2.8.1.5.) (Page 197)
2
1.35
ON Setpoint (2.8.1.5.) (Page 197) 3 1.35
OFF Setpoint (2.8.1.6.) (Page 197)
1
0.5 m
Notice that all indexed relays for
both ON Setpoint (2.8.1.5.) and
OFF Setpoint (2.8.1.6.) are set to
the same levels.
OFF Setpoint (2.8.1.6.) (Page 197)
2
0.5 m
OFF Setpoint (2.8.1.6.) (Page 197) 3 0.5 m
Pump by Rate (2.8.1.8.)
(Page 198)
1 ON The pumps will start on 20-second
intervals until the rate set in Empty-
ing Indicator (2.3.10.) (Page 199) is
met.
Pump by Rate (2.8.1.8.)
(Page 198)
2 ON
Pump by Rate (2.8.1.8.)
(Page 198)
3 ON
Delay Between Starts (2.8.2.8.1.)
(Page 207)
Global 20.0
When the first ON setpoint is reached, the pumps will start, one by one, until the material
level rate of change is set at the same value or greater than the value in:
● Filling Indicator (2.8.1.9.) (Page 198) - pump up applications
● Emptying Indicator (2.8.1.10.) (Page 199) - pump down applications
Set delay between pump starts using Delay Between Starts (2.8.2.8.1.) (Page 207)
Single- and dual-point
● Single-point Mode: One pump by rate control available that affects all pumps
● Dual-point Mode: A single pump by rate control can be set up for each of the three
available level points. Set Operation for difference or average [Sensor mode (2.1.3.)
(Page 163) = Dual-Point Difference or Dual-Point Average].
Note
•
Set all pump control relay ON and OFF setpoints to the same value.
•
If the level is within 5% of Span (2.2.2.) (Page 169) of the OFF setpoint, then the next
pump is not started.