gefran VDI100 Series Instruction Manual page 105

440V: 18.5~22 kW
220V: 22 kW, 440V: 30~160 kW
220V: 22 kW, 440V: 30~132 kW
00-27= 1: Normal Duty Mode
In normal duty mode only applies to control modes V/f and V/f + PG. All other modes must use the Heavy Duty
settings.
Code Parameter Name / Range
00-28 Command characteristic selection of master frequency
0: Positive characteristic (0-10V / 4-20mA = 0 -100%)
1: Negative / inverse characteristic (0-10V / 4~20mA = 100 - 0%)
00-28= 0: Positive reference curve, 0 – 10V / 4 – 20mA = 0 – 100% main frequency reference.
00-28= 1: Negative reference curve, 0 – 10V / 4 – 20mA = 100 – 0% main frequency reference.
Note:
Selection applies to analog input AI1 and AI2.
AI2 will be useful for analog input frequency command when 04-05=0.
(a) Normal / Positive Characteristics
VDI100 • Instruction manual
Carrier frequency (11-01) set 8kHz or below
Carrier frequency (11-01) set 8kHz or higher
Figure 4.4.10 Positive/negative analog input as main frequency reference command.
Reference ( % )
100%
-10V Analog input
0V
10V
(4 mA) (20 mA)
- 100%
-
Reference ( % )
signal
-10V
(b) Inverse / Negative Characteristics
100Hz
100Hz
80Hz
Analog input
0V
10V signal
(4 mA) (20 mA)
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