08.11.2022
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3 VDD 500 Functions
The white backlit LED temperature display VDD 500 (Virtus Data Display) has been developed for front
installation, e.g. in refrigerated case panels. The display shows the temperature of an assigned temperature
sensor from one of two temperature zones in the range between -50 °C..+100 °C and the current defrost/alarm
status.
Temperature Display VDD 500
Temperature and current status of the controller
Display of the current actual temperature of a temperature sensor:
Only one of the temperature
sensors connected to the controller can be assigned to a temperature display.
The temperature sensor is assigned in menu 6-1 (only visible if DIP switch 7 is set to ON). A
correction
value
(parameter "Offset", menu 6-2-2) can be applied to the temperature values in the temperature
display in order to be able to compensate for differences between the thermometer in the refrigerated case
and on the display of the case controller.
Note
: This correction value
only
concerns the display; the actually measured temperatures are not
corrected. The correction value has
no
influence on the control (cooling, defrosting etc.).
Defrost:
The defrost status is indicated by a "d" (defrost) and always refers to the temperature zone in
which the assigned temperature sensor is located, e.g. 4.1.
Example: If the temperature sensor R4.1 has been assigned to the temperature display, the defrost status
refers to zone 1.
Alarm:
For visualisation of a pending alarm, "AL" (alarm) can be displayed and then flashes at 2-second
intervals.
Using the parameter "Alarm symbol" (menu 6-2-2), the display of an alarm can be switched on or switched
off. The visualisation of the alarm status is switched off at the factory (parameter is set to "N").
Address of the temperature sensor
Continuous display
After switching on for the first time, the address (the last two digits of the serial number) of the
VDD is continuously displayed (e.g. "A09"). No temperature sensor has been assigned yet.
Display flashes at 2-second intervals
The VDD scan (menu 6-1) has been started and is running, the controller determines the number
of connected temperature sensors.
For full details and description of the VDD scan, addressing and assignment of temperature
sensors, see operating manual
