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EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
PSB 9000 3U Series
►
Step 2: Configuring the master unit
1.
Enter
then GENERAL SETTINGS and press
until reaching PAGE 9.
2.
Specify the unit as master with tough area
. A warning requester will appear which has to be
acknowledged with OK, otherwise the change will be reverted.
3.
Accept the settings with the touch area
and return to the main page.
►
Step 3: Initialising the master
The master unit and the whole master-slave system must now be initialised, which is done automatically after the
master unit has been activated for MS. In the main page, after leaving the setting menus, a pop-up will appear:
Tapping INITIALIZE can be used to repeat the search again, in case the de-
tected number of slaves is less than expected. This can be necessary if not
all units are set as SLAVE or the cabling/termination is still not OK. The result
window shows the number of slaves and the total current and power of the
MS system.
In case there are no slaves found, the master will still initialise the MS system
with only itself.
The initialising process of the master and the master-slave system will, as long as MS mode
is still activated, be repeated each time the units are powered. The initialisation can also be
repeated manually anytime via the MENU in GENERAL SETTINGS, PAGE: 9.
3.12.1.5 Operating the master-slave system
After successful configuration and initialisation of the master and slave units, they will show their status in the
displays. While the master merely shows “Master” in the status area, the slave(s) will continuously show like this,
as long they are in remote control by the master:
It means, as long as a slave unit is in control by the master, it won’t display
any set values, but actual values, and it will show the DC terminal status
and a possible alarm.
The slaves can no longer be controlled manually or remotely, neither via the analog nor via digital interfaces. They
can, if needed, be monitored by reading actual values and status.
The display on the master unit changes after initialisation and all set values are reset. The master now displays
the set and actual values of the total system. Depending on the number of units, the total current and power will
multiply. The following applies:
•
The master can be treated like a standalone unit
•
The master shares the set values etc. across the slaves and controls them
•
The master is remotely controllable via the analog or digital interfaces
•
All settings for the set values U,I and P (supervision, limits etc.) should be adapted to the new total values
•
All initialised slaves will reset any limits (U
Min
, I
Max
etc.), supervision thresholds (OVP, OPP etc.) and event settings
(UCD, OVD etc.) to default values, so these don’t interfere the control by the master. As soon as these values
are modified on the master, they are transferred 1:1 to the slaves. Later, during operation, it might occur that
a slave causes an alarm or event rather than the master, due to imbalanced current or slightly faster reaction.
In order to easily restore all these settings values to what was before activating MS operation, it
is recommended to make use of the user profiles (see „3.10. Loading and saving a user profile“
•
If one or more slaves report an device alarm, it will be displayed on the master and must be acknowledged there
so that the slave(s) can continue their operation. Since an alarm causes the DC terminals to be switched off and
it can only reinstate automatically after PF or OT alarms, it can be required to switch it on again by the operator
or by a remote control software.
