KEPCO BOP-ME 1KW, Operator'S Manual

Page: 97 / 234

BOP HIPWR 091719
3-21
FIGURE 3-9. MAX/MIN SETTINGS MENU
3.3.4.2 CHANGING MAXIMUM/MINIMUM PROTECTION SOFTWARE-CONTROLLED LIMITS
The ± protection limits are software limits that establish the maximum and minimum (maximum
negative) allowable levels of output voltage in current mode and current in voltage mode. The
default protection limits are 1% above E
Omax
or 1% above I
Omax
.
The protect channel limits are +V (voltage) Protect max, –V Protect min, +C (current) Protect
Max and –C Protect min (see Table 3-4); these prevent the unit from delivering voltage or cur-
rent that exceed these settings. In voltage mode the current protect channel is clamped to the
limit value; in current mode the voltage protect channel is clamped to the limit value. Adjustment
range is between a minimum (box) value (see Figure 1-3) and 1% above the nominal (rated)
value.
CAUTION: When working with active loads, always adjust the BOP protection limits to
be above the maximum values of voltage or current expected from the load.
For example, when the BOP is operating in voltage mode sinking energy
from a constant current type load, set the current protection limits of the
BOP above the maximum current expected from the load.
1. Press
%
from the power-up screen to enter the General Setup menu (Figure 3-8), then
highlight Max/Min Settings and press
!
to view. (If a Password is required, see PAR.
3.2.4.3 for instructions.)
2. Highlight the ±C Protect or ±V Protect Max or Min value and press
!
to change it. Soft-
ware limits are absolute values (do not use minus sign for negative limits). Use number keys
to change the setting. Press
$
to save, or
%
to abort.
3. When complete, press
$
to save for power-up, or
#
to abort, or
%
to apply the changes
(without saving for power-up) and exit.
4. Upon return to the power-up screen, the new protection limit (voltage or current) is com-
pared against the protection limits in effect. If the new protection limit setting is below the
existing setting for the protection limit, the protection channel (voltage or current) is set to
zero.
VOLTAGE
SOURCE
VOLTAGE CURRENT
0.0000 0.0000
VOLTAGE MODE
+Voltage Max.:
-Voltage Min.:
+C Protect Max.:
+C Protect Min.:
-C Protect Min.:
-C Protect Max.:
CURRENT MODE
+Current Max.:
-Current Min.:
+V Protect Max.:
+V Protect Min.:
-V Protect Min.:
-V Protect Max.:
10.0
10.0
75.8
0.02126
0.02128
75.8
75.0
75.0
10.1
0.15584
0.15600
10.1