46
URB 60 - Installation & Operating Manual -
819699-00
Configuring the level controller
Setting the level controller
Open the control parameter
screen.
Description of parameters:
■
■
Control direction
Control is set in either supply or drain.
■
■
Pb/Ti/Neutral Zone/
Valve Runtime (optional)
See table.
Guide to setting control parameters
Parameter
Control deviation
Control valve
Proportional
band Pb
Pb
> higher
Large offset
Responds slowly
< lower
Small offset
Responds quickly and may open/close
continually
Example:
Measuring range 100 % = 200 mm from sight glass
Setpoint SP = 80 % of measuring range = 160 mm
Proportional band Pb = +/- 20 % of setpoint = +/- 32 mm
With the measuring range and setpoint mentioned above, the proportional band is
then +/- 16 % = +/- 32 mm or in the range 128 mm to 192 mm.
Reset time
Ti
> higher
Slow correction of deviations
Responds quickly
< lower
Fast correction of deviations, the control
loop may tend to overshoot
Responds slowly
Neutral
zone
> higher
Correction of deviations starts with a
delay
In this range, the control point does
not change.
Responds only if the control
deviation is larger than the neutral
zone.
< lower
Correction of deviations starts rapidly
Valve runtime
For NRR 2-60
only
Establish the real valve runtime, e.g.
from Closed to Open (0 - 100 %).
Fig. 9
Содержание URB 60
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