Siemens SITRANS LUT400, Operating Instructions Manual

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A5E33329501 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS Page 155
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2.7.2.2. Energy Savings
Available only on LUT430 (Pump and Flow model), and LUT440 (OCM
model).
Use these parameters to maximize your device’s operation during periods
of low energy cost and minimize its operation during periods of high cost.
The methods used to achieve this are:
• Emptying the wet well just prior to the high cost period, regardless of
material level (
2.7.2.2.2.Peak Lead Time
).
• Changing setpoints for high cost and low cost periods (
2.7.2.2.13.Peak
ON Setpoint Pump 1
,
2.7.2.2.14.Peak OFF Setpoint Pump 1
,
2.7.2.2.3.Peak
1 Start Time
,
2.7.2.2.4.Peak 1 End Time
).
One peak lead time is shared by all five peak zones. When one zone’s peak
time interval (difference between peak start time and peak end time)
overlaps another zone’s peak lead time, the lead time is chosen over the
interval. If a zone’s start time matches its end time, the zone is treated as
not configured.
2.7.2.2.1. Enable
Enables/disables the Energy Savings feature. The Energy Savings
feature is used to minimize the pumping that occurs during periods
of high energy cost.
2.7.2.2.2. Peak Lead Time
The time in minutes before the Peak Start Time that the SITRANS
LUT400 will begin pumping.
This value determines when pumping should start to ensure the
level is as far as possible from the
2.7.1.6.ON Setpoint Pump 1
level. If
level is already within 5% of
2.7.1.7.OFF Setpoint Pump 1
, no action
occurs. If multiple pump stations are series linked, ensure the Peak
Lead Time entered is sufficient to attain the desired level in all
stations before the high-energy cost period occurs.
2.7.2.2.3. Peak 1 Start Time
Sets the start time of the high energy cost period 1.
Used in conjunction with
2.7.2.2.4.Peak 1 End Time
to define the high
cost period.
For instructions on how to edit parameters with a string editor, see
Using the string editor:
on page 188.
Options
* DISABLED
ENABLED
Values
Range: 0 to 65535
Default: 60
Values
Range: 00:00 to 23:59
Format: HH:MM (24 hour format, e.g. for
5:30pm, set parameter to 17:30)
Default: 00:00