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80415F_MSW_GFX4-IR_05-2019_ENG
NB
: In case of a 3-phase load, you can set a different value from parameter PS.tA for each zone (ex. to control an unbalanced 3-phase
load).
SOFTSTART or START RAMP
This type of start can be enabled either in phase control or pulse train mode and acts via control of the conduction
angle. It is enabled with parameter Hd.5.
The softstart ramp starts from a zero conduction angle and reaches the angle set in parameter PS.HI in the time set
in parameter PS.tm, from 0.1 to 20.0 sec.
With parameter Hd.5 (+64), you can configure a linear softstart in power, i.e., starting from zero you reach the power
value corresponding to the maximum conduction angle set in PS.HI. Softstart ends before the set time if power reaches the
corresponding value set in manual control or calculated by PID.
Control of maximum peak current can be enabled with parameter Hd.5 during the ramp phase; peak value is settable
in parameter PS.tA. This function is useful in case of short circuit on the load of loads with high temperature coefficients to
automatically adjust start time to the load.
The softstart ramp activates at the first start after power-ON and after a software reboot. It can be reactivated via
software control by writing bit 108 or automatically if there are OFF conditions for a time exceeding the one settable in PS.oF
(if =0 the function is as if disabled).
The ramp can also be enabled with parameter Hd.5 (+256) after a software shutdown, i.e., zero is reached in the set
time from delivered power.
630
PS.xI
R/W
maximum phase of phase softstart ramp
0.0 ...100.0 %
100.0
629
PS.of
R/W
Minimum non-conduction time to reacti-
vate phase softstart ramp
0 ...999 s
2
706
PS.ta
R/W
Maximum peak current limit during
phase softstart ramp
0.0 ...999.9 A
Model:
30kW
60kW
80kW
28.0
56.0
84.0
108
bit
OFF = Restart not enabled
ON = Restart enabled
R/W
Restart of phase softstart ramp
NB
: In case of a 3-phase load, you can set a different value from parameter FU.tA for each zone (ex. to control an unbalanced 3-phase load).
707
FU.tA
R/W
Max. limit of RMS current in normal op
0.0 ...999.9 A
60.0
30.0
15.0
Model
30kW 60kW 80kW
704
bF.(y
R/W
Min. number of cycles in BF mode
1 ...10
1
5
DIP5 = OFF
(resistive load)
DIP5 = ON
(inductive load)
705
R/W
Duration of phase softstart ramp
0.1 ...60.0 s
10.0
106
bit
State of phase softstart ramp
R
OFF = Ramp not active
ON = Ramp active
107
bit
State of phase softstart ramp
R
OFF = Ramp not ended
ON = Ramp ended
Read state
PS.tA
Содержание GFX4-IR
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