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Handling the device
Note: if the regulation mode is changed by Mode(2), all
other set values that are not adjustable for the selected
regulation mode are set to default values in order to let the
test mode work correctly. Hence the setting
is ineffective here.
The example in figure 13 shows that the current of 100A can
not be reached because the power limitation has become
active (2400W model).
6.9
Alarm management
New since firmware 3.01:
The alarm management consists of two parts: once, the most
recent alarm will be indicated and remaining on the display
(see figure 7.2) until it is acknowledged by the user and
twice, up to three different alarms are stored in an internal
error buffer. Since the first occured alarm is considered as
important, it is pushed to the end of the error buffer if more
alarms occur, but not overwritten.
If the buffer is full, the last entry is overwritten by any recent
alarm as long as the buffer is not read out by a command
using a digital interface card. Reading the buffer will empty
it and also automatically acknowledge alarms indicated on
the display.
The error buffer stores an error code and a status code for
every of the three possible entries, telling the user if the alarm
is still active or already gone. More information is contained
in the user instruction manual of the interface cards.
The display also indicates the status of the indicated alarm.
The reason is to tell the user that one or multiple alarms
have occured during his absence, especially if the alarm only
lasted for a very short period of time, like overvoltage cause
by spikes. The user has to either acknowledge that he has
noticed the alarm indication by pressing the Input on/off(4)
button or by reading the error buffer via communcation.
Note: Alarms that occur during remote or external control
are not indicated on the display, because of the control mode
status indication. Thus they only need to be acknowledge
when leaving those modes or not at all if the error has been
read before by command.
Figure 1. Battery test operation in current control (CC) mode
6
6.10 Control locations and priorities
Control locations are the locations from where the device
is controlled. This can be at the device (manual control),
Keep set values
via the analogue interface (external control) or via a digital
interface card (remote control). In order to prevent the user
from accessing the device from two locations at once there
are priorities. Following applies:
The analogue interface has the highest priority, the digital
interface the second highest one and the manual control the
lowest one. It means, that if the device was set to remote
control, modes and set values can't be set with the switches
and rotary encoders anymore. If the device would be swit-
ched to external control while remote control is active, the
remote control status would be reset and the device would
only be controllable via the analogue inputs. In order to re-
port this to a software running on a PC, still trying to access
and control the device, the control location is internally set
to „local". In „local" status the device can only be read (i.e.
monitored) by the PC.
6.11 Series and parallel connection
Series or parallel connection of multiple loads is basically
possible, but it is not explicitely supported. That means, there
is no automatic distribution of the current at parallel connec-
tion respectively of the voltage at series connection. The user
has to take care of the correct control of the devices.
When using parallel operation the symmectric distribution is
achieved by adjusting the same set values for U,I,P and R at
any device via the control panel or the interface card.
Attention! At series connection the total voltage
!
must not exceed 420V and the voltage per device
not its nominal value (see „2. Technical specifica-
tions). Thus no series conection of 400V models
is allowed because of security and isolation rea-
sons.
© 2006, Elektro-Automatik GmbH & Co. KG
Irrtümer und Änderungen vorbehalten
© 2008, Elektro-Automatik GmbH & Co. KG
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