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7.6
Behaviour after being switched on
7.7
Setting the control mode
H
H
max
H
1
s
s
H
2
s
H
min
Fig. 32: Δp-c control
38
Commissioning
CAUTION
Risk of material damage!
If abnormal noises, vibrations, temperatures or leakages occur when starting up:
• Switch the pump off immediately and remedy the cause.
During initial commissioning, the pump will work with the factory settings.
ƒ
The service menu is used for individual adjustment and re-setting of the pump; see
section "Operation".
ƒ
To correct faults, also see section "Faults, causes and remedies".
ƒ
For additional information about the factory settings, see section "Factory settings".
CAUTION
Risk of material damage! Incorrect settings for the differential pressure
sensor can cause malfunctions!
Observe the recommended default values for the DPS used (for input In1).
Δp-c control
Setting
Duty point on maximum characteristic
curve
Duty point within the control range
Q
Setting range
Table 15: Δp-c control
NOTICE
Alternatively, constant speed or PID operating mode can also be set.
Constant speed
"Constant speed" mode deactivates all other control modes. The speed of the pump is
kept to a constant value and set using the rotary knob. The speed range is dependent
on the motor and pump type.
PID-Control
The PID controller is a standard PID controller, as described in control technology liter-
ature.
The PID controller determines the difference between the measured actual value and
the desired setpoint (control deviation). It attempts to adjust the actual value to the
setpoint by changing the pump speed via its output signal.
Various controls are possible with the appropriate sensors (e.g. pressure, differential
pressure, temperature or flow control). When selecting a sensor, take note of the elec-
trical values in the "Assignment of terminals" table.
The control behaviour can be optimised by adjusting the P, I and D parameters.
The proportional term (P term) of the controller amplifies the output signal of the con-
troller directly and linearly. The sign before the P term determines the controller's dir-
ection of action.
The I term (I term) of the controller provides integral control based on the system devi-
ation. A constant deviation results in a linear increase of the output signal until the set-
Δp-c
Starting at the duty point, draw towards
the left. Read off setpoint H
S
pump to this value.
Starting at the duty point, draw towards
the left. Read off setpoint H
S
pump to this value.
H
, H
see characteristic curves (e.g. on
min
max
data sheet)
WILO SE 2020-10
and set
and set
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