5-29
For three-phase 200 V and single-phase 200 V/100 V class series o
inverters
Outputting the output current in an analog format (FMA) (F31 = 2)
The analog output terminal [FMA] outputs 10 V, that is, 200% of the ref-
erence current I
ref (A), supposing the output gain selected with F30 as
100%. Therefore, to adjust the output voltage, you need to set the output
gain at terminal [FMA] (F30) based on the conversion result obtained by
the following expression:
z Conversion formula for calculating the output gain which is required for
outputting the voltage V (V) via terminal [FMA] when current I (A) flows
across the inverter
100
(V)10
(V)V
(A)
(A)
2=gainOutput
ref
×××
I
I
Iref (A): Reference current (A)
The reference current is given in the table for F20 to F22 on page
5-26.
According to the conversion result, the output voltage to terminal [FMA]
can be calculated as shown below.
(V)10
100
(F30)gainOutput
(A)2
(A)
=(V)voltageoutputAnalog
ref
××
× I
I
(Example) Outputting analog voltage 8V for 0.75 kW standard motors
when the inverter output current is 4.2A
190.4100
(V)10
(V)8
(A)4.2
(A)5.0
2=gainOutput =×××
7.98(V)10
100
190
(A)5.02
(A)4.2
=(V)voltageoutputAnalog =××
×
Reference table
If you want to output analog 10 V at 200% of the rated current of any of the
single-phase 100 V class series of inverters, set the output gain at terminal
[FMA] (F30) as listed below.
Nominal applied motor (kW) 0.1 0.2 0.4 0.75
Output gain to be set to F30 (%) 114 107 120 119
F43, F44 Current Limiter (Mode selection and Level)
F43 enables or disables the current limiter. If it is enabled, the inverter controls the
output frequency so that the output current of the inverter does not exceed the level
set by F44. This way it prevents the motor from stalling and limits the output current
below the set level.
With F43, you may select whether the current limiter works during constant speed
operation only (F43 = 1) or during both acceleration and constant speed operation
(F43 = 2). Set F43 to 1, for example, to drive the motor at maximum performance in
the acceleration zone and to limit the drive current in the constant speed zone.
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