WIKA SC64 - Handbuch (Seite 22)

22 WIKA operating instructions models SC58, SC64
14054366.01 10/2012 GB/D
GB
A30: Type of alarm function
The alarm output evaluates an upper and a lower limit value (see
parameters P30 and P31). Here you can select whether the alarm is
active when the temperature is between these two limits, or if the alarm
is given when the temperature is outside of them. On sensor error, the
alarm is activated regardless of this setting. The output can also be
inverted with parameter A1, so that it functions like a release.
A31: Special functions for alarm
Here it is selectable whether the the display should flash. The alarm can
be cancelled with the DOWN key.
A32: Display of actual value or set point
With this parameter, it can be defined whether the actual value or the set
point should be displayed in the normal state.
A40: Hysteresis mode, control contact
With this parameter it can be chosen whether the hysteresis at the
respective switching point is symmetrical or single-sided. With hysteresis
programmed as single-sided, for heating mode it is set below and for
cooling mode above the set point; with symmetrical hysteresis there is
no difference.
A50: Minimum action time, control contact "On"
A51: Minimum action time, control contact "Off"
These parameters permit a delay in switching the respective output
contact on or off in order to reduce the switching frequency. The set time
dictates the full minimum duration of the switching-on or switching-off
phase. This time is also effective when configured as an alarm contact.
A54: Control contact delay after "Power on"
This parameter enables the delayed switching on of the control contact
after turning the power supply on. Thus, overloading the power network
by simultaneously turning on many loads is avoided.
7. Configuration