gefran GFX4-IR Series Installation And Operation Manual page 47

PORT 2 (Fieldbus option)
Non-repetitive voltage 1200Vp
Rated current AC51 non-inductive or slightly
inductive loads, resistance furnaces
Nominal current AC55b
short wave infrared lamps
Rated current AC56A load transformer permitted
trigger modes: ZC, BF con DT (Delay Triggering),
Non-repetitive overcurrent (t=20msec) 400A
I t for melting (t=1...10msec) 645A
2
Critical Dv/dt with output deactivated 10,000V/µs High static dv/dt
Rated isolation voltage 4000V
PID Parameters: pb-dt-it 0,0...999,9 % – 0,00...99,99 min – 0,00...99,99 min
Action – control outputs heat/cool – ON/OFF, PWM, GTT
Max limit heat/cool power
80404L_MHW_GFX4-IR_03-2020_ENG
Function Fieldbus serial communications
Protocol ModBus RTU, tipo RS485, baudrate 1200...115000Kbit/s
CANOpen 10K...1Mbit/s
DeviceNet 125K...0,5Mbit/s
Profibus DP 9,6K...12 Mbit/s
Ethernet Modbus TCP, Ethernet IP 10/100Mbps
EtherCAT, ProfiNET 100Mbps
POWER (Solid-state power units, 4 units)
Load type AC 51 resistive or low inductance loads
AC 55b short wave infrared lamps (SWIR)
AC 56a transformers, resistive loads with high temperature coefficient
Trigger mode PA - load control via adjustment of firing phase angle
ZC - Zero Crossing with constant cycle time (settable in range 1-200sec)
BF - Burst Firing with variable cycle time (GTT) optimized minimum.
HSC - Half Single Cycle corresponds to Burst Firing that includes ON and OFF half-cycles.
Useful for reducing flicker with short-wave IR loads (applied only to single-phase resistive or
3-phase 6-wire open delta loads).
Feedback mode V Voltage feedback: proportional to RMS voltage value on load to compensate possible
variations in line voltage.
I Current feedback: proportional to RMS current value on load to compensate variations in
line voltage and/or variations in load impedance.
W Power feedback: proportional to real power value on load to compensate variations
in line voltage and/or variations in load impedance. You have to calibrate each time you
change feedback mode.
Max rated voltage 480Vac
Work voltage range 90...530Vac
Rated frequency 50/60Hz auto-determination
30KW
4x16A
30KW
4x8A
for applications in which you can set a minimum power output limit (ex: Lo.P = 10%) by also
limiting the lamp power variation speed with gradient limit (ex: G.out = 20%, PS.TM = 20s).
Under these conditions, the nominal currents shown on the table can be raised up to the values
indicated for AC51 type loads.
30KW
4x12A
PA with softstart
s
2
Safety Detection of short circuit or opening of inputs, absence of input feed, LBA alarm, HB alarm
Selection of °C/°F Configurable
Linear scale range -1999...9999
Control actions 4 control loops: Double action (heat/cool) PID, on-off Self-tuning at start, continuous
Autotuning, one-shot Autotuning
0,0...100,0 %
Fault power setting -100,0...100,0 %
Shutdown function Maintains sampling of PV; maintains control off
Configurable alarms The alarm is assignable to an output and configurable as: maximum, minimum,
symmetrical, absolute/deviation, LBA, HB
Alarm masking Exclusion at power-on, latch, reset from digital input
60KW 80KW
4x32A (4x30)* 4x40A (4x40)* (single channel 57A ∑I = 160A)
60KW 80KW
4x16A 4x20A
60KW 80KW
4x25A 4x32A
600A 1150A
1010A s 6600A s
2 2
FUNCTION
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