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FOR REFERENCES ONLY
7.3
Speed instruction (analog signal) settings from
external devices
You can select from voltage input (0 to 10V, 0 to 5V), and current input (4 to 20mA) for an analog input terminal
(VI). The maximum resolution is 1/1000.
[Control terminal block]
Analog input terminal (VI) function settings
7
Title
Analog/logic input selection
(VI terminal)
VI input point 1 setting
VI input point 1 frequency
VI input point 2 setting
VI input point 2 frequency
Analog input filter
* Depends upon the setup menu settings. Refer to section 11.5
Note1) When stable operation cannot be attained because of frequency setting circuit noise, increase .
Note2) Semiconductor switch is used to switch between current input and voltage input.
When power supply is off, it is high impedance between VI-CC terminals in spite of current input selecting.
The break detection might operate when current generator (4-20mA) with the break detection function is used.
Please correspond as following to prevent this problem.
1) Solution by sequence
Power supply is switched off inverter and current generator (PLC etc...) at same time with interlock
sequence not to operate break detection function.
2) Solution by external resistor connection
Connect resistor 1/2W-500Ω or 470Ω between VI-CC terminals, and set the following parameter (voltage
input setting).
f109=0 (Voltage input : Default setting)
VFNC3C ENGLISH MANUAL
FLAFLBFLC
CC VI P5 FM
OUTNO CC F
R S1 S2 P24
Function
0: Voltage signal input (0 - 10V)
1: Current signal input (4 - 20mA)
2: Logic input
3: Voltage signal input (0 - 5V)
0 - 100%
0.0 - 400.0Hz
0 - 100%
0.0 - 400.0Hz
4 - 1000 ms
G-10
NOT SUBJECTED FOR RESALE
Adjustment range
Default
setting
0
0
0.0
100
*
64
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