Siemens HydroRanger 200 - Service Ratio Duty Assist (P111 = 54) [6 Relay Model]

Page 242 HydroRanger 200 – INSTRUCTION MANUAL 7ML19985FC03
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Appendix D: Pump Control
Relay Table
Service Ratio Duty Assist (P111 = 54) [6 relay model]
Selects the lead pump based on number of hours each pump has run and the specified
ratios that each pump requires. Multiple pumps can run at one time.
Please note that this feature applies to the HydroRanger 200, 6 relay model.
Relay Operation (for P118 = 2) [6 relay model]
Please note that this feature applies to the HydroRanger 200, 6 relay model.
The setpoints associated with the relays are grouped so they can be redistributed based
on pump RUN time ratios. The next pump to start or stop is the one with the required time
to actual time ratio.
Over time the number of hours demanded of each pump will conform to the ratios
specified. Usually, the ratios are specified in percent values.
To create a grouping of pumps where two pumps make up 50% of the run time and the
third pump makes up the other 50%.
P122 is set to these values:
Cycle 1 Relays
123
Setpoints
On 3 Off Off On
On 2 Off On Off
On 1 On Off Off
0ff 0 Off Off Off
Cycle 2 Relays
12 3
Setpoints
On 3 On Off Off
On 2 Off Off On
On 1 Off On Off
Off 0 Off Off Off
Cycle 3 Relays
123
Setpoints
On 3 Off On Off
On 2 On Off Off
On 1 Off Off On
Off 0 Off Off Off
P122 Index Value
125
225
350