11
based on capacitors. This case the appropriate de-compensation power will be tuned by combination of de-compensation
reactor and capacitor steps.
6.16.
Alarms
During normal operation the alarm output is opened. If there is activated an alarm by an event the alarm output will switch on
(closed contact).
Notice
Alarm output is switched on for 1 minute. After that it is switched off.
Individual events, which activate alarm event can be defined in setting mode by four particular settings. Each alarm event that
is requested has to be enabled at first. After that the value of trigger that activated alarm has to be set and also duration of
event presence. Last setting option is an alarm event influence on disconnection of compensation outputs.
In the following table there is a list of available alarm events.
Code
Description
UL.AL
Under-voltage alarm
UH.AL
Over-voltage alarm
IL.AL
Low-current alarm
IH.AL
Over-current alarm
Co.AL
Under compensation alarm
Hu.AL
THDU alarm
HI.AL
THDI alarm
ot.AL
Temperature alarm
rS.AL
Alarm from maximum allowed step connection
Temperature alarm is a special alarm which behaves in two levels. If this alarm is activated, alarm output contact is used for
ventilator control and cannot be used for any other alarm event indication. Output contact closes when temperature measured
by controller goes over level set in parameter
tEPV
. In this case, all alarm events are only shown on the display without
output contact action. Second level which disconnects all compensation stages and gives alarm event on display is defined by
parameter
tEPA
.
Caution
If the ot.AL alarm is enabled then alarm output is used for ventilator control. All other alarms are then only informative
without feedback on the alarm output.
6.17.
Configuration of RS485 communication port (PFC 12 RS)
Following parameters relate to configuration of serial communication for RS485 port (MODBUS communication protocol).
•
Id
– defines the number of device in the RS485 network and can be set from 1 ... 255
•
bAUd
–
defines communication speed between the controller and PC. Default value is 0.
•
PAr
– by default it is set to
oFF
and it can be changed to even (
on
) or odd (
on_o
)
6.18.
Password for configuration mode (CodE)
Thanks to password is possible to protect regulator against unauthorized configuration. Without proper password knowledge
it is possible only see set parameters but not to change them. Password is set as four digit number. In configuration mode
move via buttons
▲
,
►
to the parameter
CodE
. After pressing of button
SET
display will show “- - - -”. First dash from left
side is blinking. Via button
▲
set number from 0 ... 9 and confirm by button
►
. Now second dash is blinking and first set
number lights on the display. Keep the same procedure until last number is set. By pressing of button
SET
, password for
entering configuration mode is saved into the memory. From this moment it is necessary, for each change, type password in
order to enter configuration mode. Otherwise any change will not be accepted.
Password protection can be deactivated by the same way as password activating but by entering the code “0000”.
6.19.
Restart (rES)
This function restores default configuration. It is last item in the menu and it is represented on the display by symbol
rES
.
Press the button
SET
and keep it. At the same time press the button
MAN
. LED of capacitor stages will turn on and then
slowly will start to go down. This cycle will repeat two times. After that, the display will show instantaneous value of power
factor. Factory setting will be restored.
Important
After restart, it is necessary to set device again as well as make auto detection.
