nextys DCW20, Short Form Installation Manual, Page: 4 / 7

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user may adjust an output current threshold and a timer used for detecting the PC OFF status. In order to restart the PC the DCW20 toggles the output OFF and
then ON again. User must enable in the PC BIOS the automatic start in case of supply ON.
Power ON screen:
This screen is shown at power ON.
It shows the device name, serial number and firmware version.
Status:
This is the default view where the user can find the most relevant information about
the device status. The system always falls back to this view after 60s of inactivity (no
key pressed).
Settings:
All the device settings are configurable from this menu.
Use the UP/DOWN KEY to navigate through the parameters.
Press the OK KEY to enter/exit the editing mode.
In editing mode use the UP/DOWN KEY to change the highlighted value.
Info:
Device information such as firmware version, serial number and device name is
visible from this menu.
Logs:
All the alarms and event are logged in a circular buffer and visible from this screen.
Use the UP/DOWN KEY to navigate through the logs.
Wizard:
The wizard helps the user to configure the system through a series of screens.
LOGS
1. Time : time at which the log occurred.
2. Date : date at which the log occurred.
3. Name : unique log name
4. Primary value : optional.
5. Secondary value : optional.
Every event is logged in the device FLASH memory. From the log menu the user can view their history. Use the UP/DOWN KEYS to navigate between logs, 2 logs are visible
simultaneously on the LCD. Logs are of 3 different kinds: info , alarms and events . All info and alarms have an associated Modbus field with the current status (0 if inactive
or 1 if active). For info and alarms a log is generated at each status transaction. In case of active alarm the front LED and the buzzer turn ON.
Alarms
Type LCD name Description
Battery disconnected Bat. discon. Active when no battery is detected by DCW20.
Battery Ri too high Bat Ri too high Active when measured battery internal resistance exceed the alarm threshold
Battery under temperature Bat under temp. Active when the battery measured temperature (using the optional external sensor) is under the threshold
specified in “ Battery min. temperature ” field. If active the battery charged is disabled.
Battery over temperature Bat over temp.
Active when the battery measured temperature (using the optional external sensor) exceed the threshold
specified in “ Battery max. temperature ” field. If active the battery charged is disabled.
Battery lifetime elapsed Bat lifetime Active when the actual calculated battery lifetime exceeds the threshold specified in “ Battery lifetime ” field.
Battery charge failure Bat charge fail
Active when DCW20 could not charge the battery correctly. When active, the battery charger is disabled.
Disconnect the battery to reset the alarm.
Battery SoC < 25% Bat SoC 25% Active when the battery State of Charge is under 25% of the nominal full charge capacity.
Battery over discharge current Bat over dis. I
Active when the measured battery discharge current reaches the threshold specified in “ Battery max. discharge
current” field.
Battery low Bat low Active when the measured battery voltage is under the threshold specified in “ Battery low voltage ” field.
Battery deep discharged Bat deep disch.
Active when the battery measured voltage is under the threshold specified in “Battery deep discharge voltage”
field.
Backup Backup Active when the system is in backup.
Input under voltage In under volt. Active when the measured input voltage is under 90% of the “ Nominal output voltage ” field.
Input over voltage In over volt. Active when the measured input voltage exceeds 120% of the “ Nominal output voltage ” field.
Output under voltage Out under volt. Active when the measured output voltage is under 90% of the “ Nominal output voltage ” field.
Output over voltage Out over volt. Active when the measured output voltage exceeds 120% of the “ Nominal output voltage ” field.
Output overload Out overload Active when the measured output current reaches the threshold specified in “ Max. output current ” field.
Input over current In over cur. Active when the measured input current reaches the threshold specified in “ Max. input current ” field.
Auxiliary output overload Aux overload Active when an excessive load is detected on the auxiliary output.
External temperature sensor error Ext. T error
Active when the external temperature sensor is not connected while it’s use is mandatory like in NiMh battery
charging.
Backup time left < 25% Bkp left 25% Active when the system is in backup and the maximal backup time is less than the “ Max. backup time ” filed.
Warning over temperature Warn. over T Active when the internal temperature is high. If the temperature increases more the device may switch OFF.
Error over temperature Error over T Active when the internal temperature is too high. To prevent damage the device switches OFF.