9
Parameter table (continued)
Cod
Description
ACC
UoM
DEF
RANGE
P.37
Fan start temperature
Adv
°
55
0 .. 100°C
(32...212°F)
P.38
Fan stop temperature
Adv
°
50
0 .. 100°C
(32...212°F)
P.39
Temperature alarm threshold
Adv
°
45
50 .. 100°C
(122...212°F)
P.40
Step failure alarm threshold
Adv
%
75
OFF / 25…100
P.41
Maximum voltage alarm threshold
(1)
Adv
%
N.A.
OFF / 90...150
P.42
Minimum voltage alarm threshold
(1)
Adv
%
N.A.
OFF / 60..110
P.43
THD V alarm threshold
(1)
Adv
%
N.A.
OFF / 5..250
P.44
THD I alarm threshold
(1)
Adv
%
N.A.
OFF / 5..250
P.45
Maintenance interval
Adv
h
4380
1 - 30000
P.46
Bar-graph function
Usr
Kvar ins/
tot
Kvar ins/tot
Corr att/nom
Delta kvar att/tot
P.47
Default auxiliary measure
Usr
V
Deltakvar
V
A
WeekPF
Overload
Temp
THDV
THDI
ROT
P.48
Backlight flashing on alarm
Usr
ON
OFF
ON
P.49
Serial node address
Usr
01
01-255
P.50
Serial speed
Usr
bps
9.6k
1.2k
2.4k
4.8k
9.6k
19.2k
38.4k
P.51
Data format
Usr
8 bit – n
8 bit, sans parité
8 bit, impair
8bit, pair
7 bit, impair
7 bit, pair
P.52
Stop bits
Usr
1
1-2
P.53
Protocol
Usr
Modbus
RTU
Modbus RTU
Modbus ASCII
(1) Any modification of these parameters without written authorisation from Alpes excludes all warranty for the equipments
P.21
– If set to OFF, password management is disabled and anyone has access to the settings and commands menu.
P.22
– With P.21 enabled, this is the value to specify for activating user level access. See Password access chapter.
P.23
– As for P.22, with reference to Advanced level access
P.24
– Number of phases of the power correction panel.
P.25
- Enables the measurement of the actual power of the step, performed each time they are switched in. The measure is calculated, as the current
measurement is referred to the whole load of the plant. The measured power of the steps is adjusted (trimmed) after each switching and is displayed on
the step life statistic page.
P.26 – P.27
- Tolerance around the setpoint. When the cosphi is within the range delimited by these parameters, in AUT mode the device does not connect /
disconnect steps even if the delta-kvar is greater than the smallest step.
P.28
- Selecting mode of steps insertion.
Standard mode
- Normal operation with free selection of the steps
Linear mode
- the steps are connected in progression from left towards right only following the step number and according to the LIFO (Last In First
Out) logic. The controller will not connect a step when the system steps are of different ratings and by connecting the next step, the set-point value
would be exceeded.
P.29
- Setpoint used when the system is generating active power to the supplier (with negative active power / power factor ).
P.30
- Disconnection sensitivity. Same as the previous parameter but related to disconnection. If set to OFF the disconnection has the same reaction time of
connection set with the previous parameter.
P.31
- If set to ON, when switching from AUT mode to MAN mode, steps are disconnected in sequence.
P.32
– Trip threshold for the capacitors overload protection (alarm A08), that will arise after a integral delay time, inversely proportional to the value of the
overload.
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