Siemens HydroRanger 200 Instruction Manual download pdf (Page 73)

7ML19981FC01 HydroRanger 200 – INSTRUCTION MANUAL Page 59

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Pump Control

Setting a Pump to Run On

When you need to pump below the normal OFF setpoint, use P130 (Pump Run-On Interval)

and P131 (Pump Run-On Duration) to control this event.

Example:

The pump connected to Relay Three is set to pump for an extra 60 seconds every five

times it is triggered.

Setting the Pump Start Delays

The pump start delay ensures that all of the pumps do not start at once to avoid power

surges. There are two parameters used here: P132–Pump Start Delay and P133–Pump

Power Resumption Delay. The default is 10 seconds but you can increase this if your

pumps take longer to spin up.

Example:

The delay between pumps is set to 20 seconds and the delay of the first pump is set to 30

seconds.

Reducing Wall Cling

Use the Wall Cling parameter to randomly alter the ON and OFF setpoints over a range.

This eliminates the ridge of material that builds up at the setpoint that can give false

echoes.

This setting may increase the number of days between trips to clean the wet well.

Wall cling reduction is set by P136. The relay setpoints ON and OFF are randomly varied

inside a range so the material level does not stop at the same point.

Parameter Index Value Description

P130 3 5 Wait for Relay Three to pump five times and

then run on.

P131 3 60 Run on for 60 seconds.

Parameter Index Value Description

P132 G 20 Wait at least 20 seconds between pump

starts.

P133 G 30 Wait for 30 seconds when power is restored.

Note: P130 counts when the indexed relay is tripped, not the number of pump cycles. If

the indexed relay only trips once every four pump cycles then the actual interval of the

run-on will be 20 pump cycles, or five cycles of Relay Three.

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Siemens HydroRanger 200 Instruction Manual Page 73