Firmware V3.00
05.08.2019
20/100
5.2.1 Required and optional sensors
On the standard UA 400 controllers the Sensor Scan function determines the number of sensors connected.
This enables sensors that are not connected to be removed from sensor break monitoring. However, the
following procedure is required with the UA 410 L Temperature Data Logging Controller:
If specific sensors are deactivated for the alarm signalling, the sensor priority must be configured accordingly.
The priority of each sensor can be set separately to ”0” (message) or ”-” (alarm suppressed) when no alarm is
to be signalled on the Temperature Data Logging Controller. In addition to the sensors that should be
monitored, the respective alarm priorities in the UA 410 L should also be set to the values 0 (message) or 1..2
(alarm signal).
Required and optional sensors are listed below:
Controller type
Sensors necessary Optional sensors
(advanced functions e.g. for control, see
)
UA 410 L
None
Rx.1 Rx.2 Rx.3 Rx.4 Rx.5
Rx.6 Rx.7 Rx.8 Rx.9 Rx.0
Sensor break alarm
Alarm only takes place for sensors set to a sensor alarm priority of 1 or higher. An alert is generated when
sensor alarm priority is set to 0 and no alarm or message is generated when sensor alarm priority is set to ”-”.
5.3 Controller function
The sections following describe the various functions of the UA 410 L for control and temperature recording of
refrigeration points.
5.3.1 Cooling (solenoid valve)
On-off control
Control is made by one temperature sensor (the first five temperature sensors Rx.1 .. Rx.5 only). The cooling
relay de-energizes when temperature reaches the setpoint (switch-off value, Menu 2) on the respective
temperature sensor. The cooling relay re-energizes with the set hysteresis.
Cooling relay operation
N.O. control, i.e. cooling is OFF when the case controller is de-energized.
A sensor is recognised as connected in LDSWin (PC software) when its priority is set to 0 .. 2. It is
considered unused within LDSWin (no message/alarm/recording), when its priority is set to --.
This approach is different from that used with other case/coldroom controllers, on which sensor break
alarm can be set by sensor scan.
Cooling (not the controller itself) can be stopped via Digital Input 1 (Terminals D11/12). Control is
suppressed when a 230 V AC signal is applied to this input. Cooling is active when the input is not
connected or not active.
CAN bus disabling of refrigeration points by the compressor pack controller is not available on the UA
410 L.
