User manual

Page 51
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSI 9000 2U Series
3.4.4 Adjustment limits (Limits)
Adjustment limits are only effective on the related set values, no matter if using manual
adjustment or remote control setting!
Defaults are that all set values (U, I, P, R) are adjustable from 0 to 100%.
The full range may be obstructive in some cases, especially for pro-
tection of applications against overvoltage. Therefore upper and lower
limits for current (I) and voltage (U) can be set separately, which then
limit the range of the adjustable set values.
For power (P) and resistance (R) only upper value limits can be set.
► How to congure the adjustment limits
1. On the main screen, tap to access the SETTINGS menu.
2. Tap the white arrows to select “3. Limits”.
3. In each case a pair of upper and lower limits for U/I or the upper limit for P/R are assigned to the rotary
knobs and can be adjusted. Tap the selection area for another choice .
4. Accept the settings with .
The set values can be entered directly using the ten-key pad. This appears when the touch area
for rotary knob assignment is tapped (bottom center)
The adjustment limits are coupled to the set values. It means, that the upper limit may not be
set lower than the corresponding set value. Example: If you wish to set the limit for the power
set value (P-max) to 1.00 kW while the currently adjusted power set value is 2.00 kW, then the
set value rst would have to be reduced to 1.00 kW or less
3.4.5 Changing the operating mode
In general, the manual operation of a PSI 9000 2U distinguishes between two operating modes which are tied to
set value input using the rotary knobs or ten-key pad. This assignment must be changed if one of the three set
values is to be adjusted which is currently not available.
► How to change the operating mode:
1. Unless the device is device in remote control or the panel is locked, you switch the
operation anytime. There are two options: either tap the depiction of the right-hand
knob (see gure to the right) to change its assignment between I, P and R, which
is displayed below the knob depiction, or
2. you directly tap on the coloured areas with the set values, like shown in the gure
to the right. The unit next to the set values, when inverted, indicates the assign-
ment of the knob. In the example in the gure it has U and P assigned, which
means U/P mode.
Depending on the selection the right rotary knob will be assigned different setting values,
the left knob is always assigned to the voltage.
In order to avoid constant changing of the assignments it is possible, e.g with selection U/I being
active, to change the other value P by direct input. See section 3.4.6.
The actual operating mode, while the DC output is switched on, solely depends only on the set values. For more
information see section „3.2. Operating modes“.