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SSR CONTROL MODES
ON Modality
The GFW has the following power control modes:
-
PA modulation via variation of phase angle
- ZC, BF, HSC modulation via variation of number of conduction cycles with zero crossing trigger.
PA phase angle: this mode controls power on the load via modulation of the phase angle.
ZC zero crossing: this type of operation reduces EMC emissions. This mode controls power on the load via a series of conduction ON and
non conduction OFF cycles.
The cycle time is constant and can be set from 1 to 200 sec. (or from 0.1 to 20.0 sec.).
BF burst firing: this mode controls power on the load via a series of conduction ON and non conduction OFF cycles. The ratio of the number
of ON cycles to OFF cycles is proportional to the power value to be supplied to the load. The repeat period or cycle time is kept to a minimum
for each power value.
Parameter bF.Cy defines the minimum number of conduction cycles, settable from 1 to 10.
In case of 3-phase load without neutral or closed delta, BF.Cy >= 5 has to be set to ensure correct operation (balancing of current in the 3 loads).
HSC Half Single Cycle: this mode corresponds to a BF that includes ON and OFF half-cycles. It is useful for reducing flicker with short-wave
IR loads (and is applied only to single-phase or 3-phase with neutre or open delta loads).
Start mode is set with parameter Hd.5
Control of maximum rms current (whose value is set in parameter Fu.tA) can always be enabled with parameter Hd.5 in every power-on mode.
The cycle time can be set with two different resolutions in seconds or tenths of a second based on the type of function assigned to outputs
rL1 and rL2.
Setting
703*
xd.5
Trigger mode in
normal operation
Phase angle PA
(Phase Angle)
Variable cycle time
ZC (zero crossing)
Slow set:
0,1<Ct<20,0 sec.
0,1<Ct<20,0 sec.
80997D_MSW_GFW_400-600_04-2021_ENG
POWER CONTROL
R/W
Enable trigger modes
Full wave
Variable cycle time
BF (Burst Firing)
Set: Ct = 0
Fast set:
HSC
rL.1 = +64
(Half Single Cycle)
See table of trigger modes
DIP 5 = OFF
(Resistive load)
141
141
141
Zone 1
Zone 2
Zone 3
DIP 5 = ON
(Inductive load)
32
32
32
Zone 1
Zone 2
Zone 3
57
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