gefran GPC - 3.28. Softstart; Maximum Phase of the Phase Softstart Ramp; Phase Softstart Ramp Duration

81901A “MSW_GPC-40/600A”_03-2021_ENG_page 109
3.28. Softstart
Softstart allows a gradual increase in power output. It can
be enabled in either phase control or zero crossing modes
(or pulse train modes) and acts by controlling the conduc-
tion angle.
Softstart is enabled via parameter hd.5.
The softstart ramp starts from a zero conduction angle and
reaches the angle set in parameter PS.HI within the time
period set in parameter PS.tm (0.1 to 60.0 seconds).
A linear softstart in power can be configured with parameter
hd.5 (+64), i.e., starting from zero, the power value corre-
sponding to the maximum conduction angle set in PS.HI is
reached starting from zero.
The softstart ends before the defined time if the power
reaches the corresponding required value set in manual
control.
During the ramp phase, control of the maximum peak cur-
rent can be enabled via the hd.5 parameter; the peak value
can be set in parameter PS.tA.
This function is useful in the event of a short circuit on the
load or of loads with high temperature coefficients in order
to automatically adapt the start-up time to the load.
The softstart ramp is activated at the first startup after the
Power-On and after a software restart. It can be reactivated
by a software command by writing bit 108, or automatically
if there are OFF conditions for a time longer than that set in
PS.oF (if =0 the function is as if it were disabled).
The switch-off ramp can also be enabled via parameter
hd.5 (+256). In this case, zero power is achieved within the
set time.
3.28.1. Maximum phase of the phase softstart ramp
Address
Format
GPC-OP
menu
Acronym
Global / M/E1/E2
GF_eXpress menu
Attribute Retentive Type Unit of mea- surement Default
Single-
node
Multi-
node
Description
1654
630 16 bit
09.01.04
PS.Hi
M
MainMenu → M → Power controls →
PS.Hi_1
R/W
■
Float % 100.02755 09.02.04 E1
MainMenu → E1 → Power controls →
PS.Hi_2
4803 09.03.04 E2
MainMenu → E2 → Power controls →
PS.Hi_3
The parameter sets the maximum phase of the phase softstart ramp.
min...max: 0.0...100.0
3.28.2. Phase softstart ramp duration
Address
Format
GPC-OP
menu
Acronym
Global / M/E1/E2
GF_eXpress menu
Attribute Retentive Type Unit of mea- surement Default
Single-
node
Multi-
node
Description
1729
705 16 bit
09.01.05
PS.tm
M
MainMenu → M → Power controls →
PS.tm_1
R/W
■
Float sec. 10.02753 09.02.05 E1
MainMenu → E1 → Power controls →
PS.tm_2
4801 09.03.05 E2
MainMenu → E2 → Power controls →
PS.tm_3
The parameter sets the duration of the phase softstart ramp.
min...max: 0.1...60.0