3
Fig. 1
: Heating controller, asymmetrical hysteresis
Fig. 2
: Heating controller, symmetrical hysteresis
Fig. 3
: Cooling controller, asymmetrical hysteresis
Fig. 4
: Cooling controller, symmetrical hysteresis
P4/P5 Lower/upper setpoint limit
The setpoints S1/S2 (and P1) can be set only within the limits defined here.
P6 Actual value correction
The value set here is added to the measured value from the sensor. The resulting value is displayed and acts as the basis for regulation.
P19 Disable setpoint adjustment
If this parameter is active, the buttons on the front panel are disabled.
We recommend that this be done after all adjustments.
In the disabled state, the setpoint cannot be adjusted with the buttons on the front panel. Any attempt to adjust the setpoint then results in the
message "---" on the display.
P30 Lower limit value for alarm
P31 Upper limit value for alarm
The alarm output can be used as a limit-value or bandwidth alarm. It has an asymmetrical hysteresis (see parameter P32). In both cases, the limit
values may be relative to setpoint S1 or absolute, i.e. independent of setpoint S1.
For a limit-value alarm, the hysteresis is asymmetrical inwards; for a bandwidth alarm, it is asymmetrical outwards (see Figs. 5 to 8)
P32 Alarm hysteresis, asymmetrical
The hysteresis is asymmetrical with reference to the selected limit value. Its function depends on the alarm definition.
