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AEG Electrolux THYRO-A Operations Instructions Page 12

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20 21
The user can adapt the setpoint signal to process controllers or to the
automation system (see page 42, Set point input range).
This is done by altering the starting and finishing points of the control
characteristic curve. All common signals can be used.
As soon as the power controller reaches a limit value (U
max
, I
max
, P
max
),
this is indicated by LEDs (see page 29, LED messages).
The power controller has two setpoint inputs that are electrically isolated
from the mains and of which only one is ever active.
• setpoint 1: analog signal X2.4 (+); X2.3 (ground)
• setpoint 2: via system interface (bus module, Thyro-Tool Family)
The effective setpoint is the value when connected through. The set-
point input to be used is defined by configuring terminal X22.1 (see
page 36, Settings and operation).
3.3 CONTROL MODES
The power controller has various different control modes.
Before commissioning the power controller and selecting a control mode,
familiarization with the operating procedure and the effect upon the
application is important.
CONTROL MODES ...H1
Control mode Control variable
U, U
2
highest conductor voltage
CONTROL MODES ...H RL1
Control mode Control variable
U, U
2
highest conductor voltage
I, I
2
highest phase current
CONTROL MODES ...H RLP1
Control mode Control variable
U, U
2
highest conductor voltage
I, I
2
highest phase current
P total effective power
Fluctuations in mains voltage and changes in load are compensated
directly by bypassing the inert temperature control circuit. This method
is therefore particularly fast (secondary control).
U Output voltage, U
eff
U
2
Output voltage, U
2
eff
I Output current, I
eff
I
2
Output current, I
2
eff
(only with …H RL1 und H RLP1)
CONTROL CHARACTERISTIC CURVE AND CONTROL
VARIABLE
The control variable influencing the load is proportional to the effective
setpoint in the case of control modes U, I, P. In control modes U
2
, I
2
, the
control variable influencing the load is a square of the effective setpoint.
U
max
...H1: R201
...HRL1: R202
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