P32 Hysteresis alarm contact
The hysteresis can be set symmetrically or one-sided at the adjusted limit values. (see A42). It
becomes effective depending on alarm definition. At one-sided setting and boundary alarm the
hysteresis is effective above the lower and below the upper limit value. At one-sided setting and
range alarm the hysteresis is effective above the upper and below the lower limit value. At
symmetrical hysteresis, half of the hysteresis’ value is effective below and half of the value above
the switching point.
P33: Lower range limitation for fixed setpoint control on following sensor
P34: Upper range limitation for fixed setpoint control on following sensor
P33 and P34 are the limit values for the main setpoint, formed by reference variable and the given
offset temperature. If the main setpoint is above the upper or below the lower limit value the value
of P33 or P34 becomes effective as new setpoint and the leading value has no more effect on the
setpoint. When the temperature range between P33 and P34 is reached again the control returns
to the main setpoint as before.
P40: Analogue output
This is to define whether the analogue output carries reference variable, the actual following value
or the actual leading value. In case of reference variable display, the sign can change, depending
on whether heating or cooling is required. The actual values, however, are always indicated with
positive sign.
P41: Indication value for 0V at analogue output
P42: Indication value for 10V at analogue output
Indication of the actual value is subject to the following range adjustment:
If temperature reaches the value set in P41, voltage is 0 V.
If temperature reaches the value set in P42, voltage is 10 V.
P43: Indication value full heating performance (100%)
P44: Indication value "0" performance
P45: Indication value full cooling performance (-100,0%)
Indication of the variable is subject to the following range adjustment:
If heating is to be performed with 100 %, voltage is as set at P43.
If neither heating nor cooling is requested, voltage is as set at P44.
If cooling is to be performed with 100 %, voltage is as set at P45.
On the following page there are some scaling examples.
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