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Basic settings
5.3
External operation
When operating the inverter via external signals, the motor is started and stopped by external
signals connected to terminals STF and STR of the inverter. Just as when operating using the
parameter unit, the set frequency value may originate from various sources:
● A fixed set value
Operation at the frequency set in the frequency setting mode of the PU. (Refer to section
5.3.1.)
● Selection of stored set values by external signals
Give a frequency command by switch (multi-speed setting). (Refer to section 5.3.2).
● Setpoint setting made by external analog signals
Perform frequency setting by a voltage output device (section 5.3.3.) or by a current output
device (section 5.3.4).
5.3.1
Use the set frequency set by PU (Pr. 79 = 3)
● Set "3" in Pr. 79 (External/PU combined operation mode 1).
● Switch terminal STF (STR)-PC on to give a start command.
● Refer to section 5.2.1 for the set frequency by PU.
Fig. 5-20: External operation
FR-D700 SC EC
Power supply
Forward rotation start
Reverse rotation start
Inverter
Motor
Operation
panel
Set frequency
External operation
I002027E
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