4 Operating From a Personal Computer
34
Operation Guide Flatpack MCU,
351300.013, v8-2006-07
The following parameters can be set/changed:
•
High Battery Alarm (volts)
•
Low Battery Alarm (volts)
•
LVD1 / LVD 2 / LVD3 Disconnect Voltage, (Volts)
Voltage limit for disconnection of load
or
battery. The disconnect unit (contactor) will open at this voltage, and may be
interdependent on if the mains voltage is present (see Installation Settings)). This output must be hardwired in the
system for battery (LVBD) or load (LVLD) disconnect.
•
LVD1 / LVD 2 / LVD3 Disconnect Delay Time (minutes)
Default
= 0 minutes
Application
: Disconnection of loads (LVLD) at a predetermined time after the mains voltage is cut off. If the mains
supply voltage is interrupted, an internal timer (minute counter) starts to count down from the pre-set time value. When
the timer reaches zero, the load (
or
the battery, depending on how the system is configured) will be disconnected. If the
mains returns before the timer reaches zero, the LVLD will
not
disconnect and the timer will count upwards to the pre-
set time. If the mains is lost again while counting upwards and the battery voltage is still above low voltage disconnect
(LVD), the timer will change direction and count downward. If the battery voltage falls below the LVD level before the
counter = 0, then LVLD will be activated to prevent battery damage due to over-discharge. The
Disconnect Delay
Timer
is deactivated when set to 0.
•
Battery Voltage (Volts)
The alarm module will regulate the battery voltage to the specified value, if
Output Control
is selected (see chapter
Output Control
) If the resistance of the battery cable is set to zero, the battery and the output voltages will be equal.
•
Boost Voltage (Volts)
Voltage level for boost charging. For more information on how to start boost-charging, see chapters
Auto Boost
and
Manual Boost
.
•
Alarm Delay (seconds)
The operator can define a delay for the mains alarm and low battery voltage alarm. The duration of the alarm delay can
be set between 0 and 60 sec. Default setting is 0.
•
High Temp. (
°
C)
Generates an alarm condition in case of high battery temperature. Two levels are provided, which may be configured
for relay alarms and also to automatically disconnect the battery contactor, if desired. The alarm levels can be changed
between 5
°
C and 80
°
C. Level 1 must be lower than Level 2. When the temperature exceeds Alarm Level 1, the alarm
message "High Temp. Alarm 1" will be displayed. This alarm will automatically be reset when the temperature falls
below the pre-set level. If the battery temperature exceeds Alarm Level 2, the alarm message "High Temp. Alarm 2"
will be displayed. In order to cause a LVD (battery disconnect) on either temperature alarm, the appropriate LVD must
appear in the alarm output configuration in the Alarm Setup/Display menu. Temperature alarms are reset if sensor alarm
occurs.
•
Low Temp Alarm
(°C)
Generates an alarm condition in case of low battery temperature. Alarm point is settable between –35°C and +20°C.
Temperature alarms are reset if sensor alarm occurs.
•
Rectifier Capacity Alarm (percent of capacity)
This feature allows setting an alarm condition that is based on a percentage of the available rectifier output current. This
can be used as a rectifier redundancy alarm or for any other situation where it is necessary to be notified when the
system current exceeds a percentage of the charge current capability.
9
NOTE:
If the “Mains Dependant” checkbox is cleared (see Installation Settings), the
Disconnect Delay is disabled.
9
NOTE:
Hysteresis on
High Temperature 1
and
Low Temperature
alarms is 1°C; hysteresis
on
High Temperature 2
is 2°C.
9
NOTE:
The temperature alarm-functions are available, and the set points are changeable,
only when temperature-compensated charging is activated.