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EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
PSI 9000 2U Series
3.
The two units at the beginning and end of the chain should be terminated, if long connection cables are
used. This is achieved using a 3-pole DIP switch which is positioned on the back side of the unit next to the
MS connectors.
►
Position: not terminated
(standard)
Switches 2 and 3 serve as a BIAS network and should be
switched on to avoid undefined bus noise.
Position: terminated
Switch 1 enables the bus termination resistor.
Now the master-slave system must be configured on each unit. It is recommended to configure first all the slave
units and then the master unit. If it is done the other way around, or slaves are added later, the master must be
re-initialised so that it recognizes all the slaves and sets itself up accordingly.
►
Step 1: Configuring a slave unit
1.
Enter
then GENERAL SETTINGS and press
until reaching PAGE 7.
2.
Activate the MS mode with
.
3.
Change with
to PAGE 8
4.
Specify the unit as
. If it was previously defined as master, then a query will appear which must be
acknowledged with OK, otherwise the change will be reverted.
5.
Set the address of the slave between 1 and 15 with the left-hand rotary knob. Ensure that no address is
allocated twice.
6.
Accept the settings with the touch area
and return to the main page. The slave unit is now
configured.
►
Step 2: Configuring the master unit
1.
Enter
then GENERAL SETTINGS and press
until reaching PAGE 7.
2.
Activate the MS mode with
.
3.
Change with
to PAGE 8
4.
Specify the unit as
. If it was previously defined as slave the address will be reset to 0 and is not
changeable (the master always has address 0).
5.
Change with
to PAGE 9
6.
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. In the main page, after quitting the
setting menus, a pop-up will appear:
Tapping INITIALIZE will cause the unit to search for slaves and then to con-
figure itself for set and actual values accordingly. If more than one correctly
configured unit is found then this screen will show the number of slaves and
the combined total current and total power.
If no slaves are found, or the correct number is not displayed, then the settings
of all the slaves and master together with the cabling must be checked and
setup process repeated.
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 be repeated
anytime via the MENU in GENERAL SETTINGS, PAGE: 9.
