gefran VDI100 Series User Manual

Figure4.4.38Frequencygainadjustment
100%
-10V
+10V
(20mA)
0V
(4mA)
FGAIN
Terminal AI2
analog input
Example:
When the internal gain of AI1 (04-02) is set to 100% and AI2 to 5V (for example FGAIN = 50%), the reference
frequency of terminal AI1 will be 50%, as shown in Figure 4.4.39.
Figure4.4.39Frequencyreferencegainadjustment(example)
0%
50%
100%
0V
04 - 02 = 100%
04 - 02 × FGAIN = 50%
Terminal AI1
input voltage
Frequency
Reference
10V
04-05=2: Frequency Reference bias (FBIAS)
Multi-function analog input terminal AI2 can be used to adjust the frequency reference bias of AI1.
The total frequency reference bias of terminal AI1 is the sum of internal bias set by parameter 04-03 and FBI-
AS. The maximum frequency reference for AI1 is 100%.
Figure4.4.40Biasadjustment
10V
(20mA)
0V
(4mA)
100%
-100%
-10V
FBIAS
Terminal AI2
analog input
Example:
Terminal AI1 input is 0V, 04-02 = 100% (AI1 gain), 04-03 = 0% (AI1 bias) and terminal AI2 input is 3V. The
reference frequency will be 30% as shown in Figure 4.4.41.
VDI100 • Instruction manual 175

gefran VDI100 Series Specifications

General

Brand	gefran
Model	VDI100 Series
Category	Inverter
Language	English