DER2 digital regulator instruction manual - rev. 02 - pag. 32
3. APO Output
The APO output status ((Transistor open collector Active Protection Output - connector CN1 terminals 23
(common) and 24 (collector)] depends on:
- whether some alarms are activated or not
- setting of parameter P[17]
- setting of the ''APO Invert'' flag
In normal operating conditions it is closed. It opens
(with a configurable delay from 0 to 15 seconds) when, of
all the alarms, one or several separately selectable alarms are active and the ''APO Invert'' flag
is active or,
immediately, in case of absence of power supply to the regulator; if the ''APO Invert'' flag
is inactive the APO
output is inverted (open in normal operating conditions or with regulator switched off, closed, with a configura-
ble delay, in case of one or several active selected alarms).
The selection of which alarms trigger the activation of A.P.O. depends on the value written at location 17. The
transistor is closed
both when no alarm is active and when, even if the alarm is active, the corresponding en-
abling bit is set to 0.
The value to set at location 17 is made up of 2 parts: one part allows selection of the alarms which activate
the contact, the other one allows setting the intervention delay. To calculate the value to set at location 17
use the following procedure:
a) In relation to table 15. Add up the decimal numbers corresponding to the alarms for which you want APO
to be activated obtaining number B. (Example: if you want APO to be activated for overvoltage and over-
speed, you get B = 2 +64 = 66)
b) Multiply the delay you want (integer values from 0 to 15 seconds) by the fixed value 4096. You get number
A = (0..15) * 4096. (Example: if you want a 5 seconds delay, you get A = 5 * 4096 = 20480)
The sum A + B must be written at location 17 (In the preceding example 20480 + 66 = 20546)
The configuration is simplified a lot by the use of the DxR terminal software which has the APO settings menu
dedicated to this purpose.
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
-
-
-
-
Underexcitation Overspeed Underspeed Over Excitation
Short
Under voltage
Over voltage
2048 1024
512
256
128
64
32
16
8
4
2
TABLE 15 : ALARM SETTINGS THAT ACT ON THE APO
4. DER2 operation time
If the regulator is working correctly (no alarm) A12 will be active and the bit 11 will be High at location L[38].
When we see one alarm, the A12 is deactivated, bit 11 is reset at location L[38] and operation time is stored.
The total operation time of the regulator is obtained, after the download of the alarms, by adding all the times
TT (last column of the file .alr).
For this procedure please refer to the ''DownLoad Alarm'' function of the Upload/Download Menu of DxR Ter-
minal Software, see Technical guide “Interface communication USB2DxR”.
Содержание DER2
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