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880397M_MSW_GFX4-GFXTERMO4_08-2018_ENG
HEATING OUTPUT (Fast cycle)
For outputs rL.1 (Out 1) and rL.2 (Out 2) you can set a fast cycle time (0.1 ... 20 sec) by setting the parameter to 64
(Heat) or 65 (Cool).
160
rL.1
R/W
Allocation of reference signal
0
See: Generic alarms -Table of reference signals
163
rL.2
R/W
Allocation of reference signal
1
SSR CONTROL MODES
The following models are available:
GFX4 30 kW with full scale 16A in all four zones
GFX4 60 kW with full scale 32A in all four zones
GFX4 80 kW with full scale 40A in all four zones, 57A for single zone
There are two power control modes,
- with settable cycle time (Ex: Ct.1 = 2sec if power Out.P = 50,0% output on for 1 second and output off for 1 second)
- with variable cycle time with power delivery optimised in packets with minimum duration of 20ms (GTT function)
(Ex: Ct.1 = 0 if power Out.P = 50,0% output on for 20ms and output off for 20ms).
In the rst case, you can set the cycle time with two different resolutions, in seconds or in tenths of a second, based
on the type of heating (heat) or cooling (cool) function assigned to outputs rL1 and rL2.
It is advisable to use short cycle times (< 2-3 sec.) in case of control by means of solid state devices (SSR).
HEURISTIC Control power
It is useful to be able to limit the delivery of total power to the loads in order to avoid input peaks from the single-phase
power line.
This condition occurs during switch-on phases when the machine is cold; the demand for heating power is 100%
until temperatures near the setpoint are reached. It is also useful to avoid simultaneity of conduction when there is ON-OFF
modulation for temperature maintenance.
The cycle time must be identical for all zones; the power percentage for each zone is limited to that necessary to
maintain current within set limits.
POWER CONTROL
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