User manual

Page 45
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
EL 9000 B HP Series
3.4.4 Adjustment limits
Adjustment limits are only effective on the related set values, no matter if using manual adjust-
ment or remote control!
Defaults are, that all set values (U, I, P, R) are adjustable from 0 to
100%.
This may be obstructive in some cases, especially for protection of
applications against overcurrent. Therefore upper and lower limits
for current (I) and voltage (U) can be set which 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
5. On the main screen, tap to access the SETTINGS menu.
6. Tap the arrows to select “3. Limits”.
7. 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 .
8. Accept the settings with .
The set values can be entered directly using the ten-key pad. This appears when tapping touch
are “Direct input”.
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 upper limit for the
current (I-max) to 35 A while the set value of current is adjusted to 40 A, then the set value
would rst have to be reduced to 35 A or less, in order to enable setting I-max down to 35 A.
3.4.5 Changing the operating mode
In general, the manual operation of an EL 9000 B HP distinguishes between three setting modes (U/I, P/I, R/I)
which are tied to set value input using the rotary knobs or ten-key pad. This assignment must be changed if one
of the four 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 left-hand
knob(seeguretotheright)tochangeitsassignmentbetweenU,PandR,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 knobs. In the example to the right they have P and I assigned, which
means P/I mode.
Depending on the selection the left rotary knob will be assigned different setting values,
the right knob is always assigned to the current.
In order to avoid constant changing of the assignments it is possible, e.g with selection R/I, to
change the other values U and P by direct input. Also see section 3.4.6.
The actual operating mode of the load, which is only effective and indicated while the DC input is switched on,
solely depends on the set values and the input voltage. For more information see section „3.2. Operating modes“.