gefran GFW 400-600A Configuration And Programming Manual page 61

IMPORTANT
Feedback calibration can be activated from the digital input (parameters diG.1/diG.2/diG.3/diG.4) or by serial control (ref. bit113), and if re-
quested MUST be activated only with Hd.6=0 (the required Hd.6 value can be set only after calibration) and preferably with maximum power
on the load (ex. P_man or P_pid at 100%).
If you change function mode (PA, ZC, BF, HSC), you have to re-run the Feedback calibration procedure.
Voltage V (or current I or power P) feedback corrects the % of conduction with a maximum settable value in parameter Cor.V (or Cor.I or Cor.P).
For non-linear loads (ex.: Super Kanthal or Silicon Carbide) the automatic calibration procedure is NOT NECESSARY. Set the value of para-
meters ref.V, ref. I, ref. P based on the specific nominal of the load shown on the data-sheet (ref. GFW Installation Guide).
730*
xd.6
731*
(OR.V
732*
(OR.i
733*
(OR.p
734*
Rif.V
735*
Rif.i
884*
736* Rif.p
LSW only
741*
fb.It
Calibration
113*
of voltage
bit feedback
reference
80997D_MSW_GFW_400-600_04-2021_ENG
R/W
Enable feedback modes
Maximum correction of
R/W
voltage feedback
Maximum correction of
R/W
current feedback
Maximum correction of
R/W
power feedback
R/W
Voltage feedback reference
R/W
Current feedback reference
R/W
Power feedback reference
R/W
Feedback response speed
OFF = Calibration not enabled
R/W
ON = Calibration enabled
Table of feedback modes
Feedback ON
0 None
1 V (Quadratic voltage)
2
2 I (Quadratic current)
2
3 P (Power)
4 None
5 V (Linear voltage)
6 I (Linear current)
0.0 ...100.0%
0.0 ...100.0%
0.0 ...100.0%
0.0 ...999.9 V
0.0...3275.0 A
Data in DWORD (32
bit) format for ad-
dress 884*
0.0...1500.00 kW
LSW data in WORD
(16 bit) format for
address 736*
0.1 ...5.0
% / 60msec.
0 0 0
Zone 1 Zone 2 Zone 3
100.0 100.0 100.0
Zone 1 Zone 2 Zone 3
100.0 100.0 100.0
Zone 1 Zone 2 Zone 3
100.0 100.0 100.0
Zone 1 Zone 2 Zone 3
0.0 0.0 0.0
Zone 1 Zone 2 Zone 3
0.0 0.0 0.0
Zone 1 Zone 2 Zone 3
0.0 0.0 0.0
Zone 1 Zone 2 Zone 3
0.3 0.3 0.3
Zone 1 Zone 2 Zone 3
61