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TABLE 3 : HARDWARE AND SOFTWARE CONFIGURATION OF VOLTAGE REMOTE CONTROL
Type
Potentiometer
0V/2,5V without saturation
0V/2,5V with saturation
-10V/+10V without saturation
-10V/+10V with saturation
Parameter P[15]
Location L[49]
With a 100Kohm linear potentiometer connected as shown in figure 4a, you have the full excursion set with parameter P[16] (with the default value
P[16]=4608 there is an excursion of ± 14%); with a 25Kohm linear potentiometer in series with a 3.9Kohm resistor, connected as shown in figure
4b, the effect of the external potentiometer is cut in half (with the default value P[16]=4608 there is an excursion of approximately ± 7%).
Figure 4a: 100K external potentiometer connection
50/60 Signal
A jumper is located on the 50/60 input (terminals 25 and 26); it provokes the commutation of the underspeed protection
threshold from 50·(100%-αHz%) to 60·(100%-αHz%), where αHz% represents the position relative to the Hz trimmer.
APO Contact
The acronym APO stands for Active Protection Output: terminals 23 (common) and 24 (collector) 30V-100mA non-
insulated open collector transistor, normally opened, is closed (with a delay that can be programmed only by software
from 1 to 15 seconds) when, among all the alarms, one or more of the active ones can be selected separately by soft-
ware.
The VOLT trimmer allows adjustment from about 75V to about 150V when using for sensing terminals 6/7 - 10/11/12
(with brdge 8-9), 15-16 and 20-21, or from about 150V to about 300V when using terminals 4/5 - 9/10/11/12, 14-17 and
19-22.
The STAB trimmer adjusts the dynamic response (statism) of the alternator under transient conditions. Do not set this
trimmer in a position lower than two notches counted counterclockwise.
The AMP trimmer adjusts the excitation overcurrent protection intervention threshold.
Use the following procedure in order to calibrate the overload protection:
1) Rotate the Hz trimmer entirely in the counter clockwise direction
2) Apply the nominal load to the alternator.
3) Decrease the speed by 10%
4) Two minutes later slowly rotate the AMP trimmer in the counter clockwise direction until there should be a decrease in
the voltage value of the generator and alarm 5 should come on (visible due to a change in the flashing indicator light) .
5) Under these conditions, adjust the AMP trimmer, until the output voltage value is 97% of the nominal value: alarm 5 is
still activated.
6) Return to the nominal speed; alarm 5 should disappear in a few seconds and the generator voltage should increase to
the nominal value.
7) Adjust the trimmer as indicated in the following paragraph.
Input
0Ext - Pext (29-30)
0Ext - Pext (29-30)
0Ext - Pext (29-30)
0Ext - ±10V (29-32)
0Ext - ±10V (29-32)
EEPROM
RAM
Jumpers
JP1 (27-28)
JP2 (31-32)
Close
Close
Close
Close
Close
Close
Open
Open
Open
Open
Close
Close
Close
Close
Figure 4b: 25K external potentiometer connec-
60
Flags (Menu configuration) or Parameter P[10]
RAM Voltage CTRL
Ext. Input
Disabled (Bit B7=0)
Enabled (Bit B12=1)
Disabled (Bit B7=0)
Enabled (Bit B12=1)
Enabled (Bit B7=1)
Enabled (Bit B12=1)
Disabled (Bit B7=0)
Enabled (Bit B12=1)
Enabled (Bit B7=1)
Enabled (Bit B12=1)
Disabled (Bit B7=0)
Disabled (Bit B12=0)
Enabled (Bit B7=1)
Disabled (Bit B12=0)
ATO/E 28 Manual - March 2018 rev. 00
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