5.3 Description of Function Codes 5.3.2 E codes (Extension terminal functions)
Inverter running “RUN” assignment (Function code data = 0), Inverter outputting “RUN2” assignment
(Function code data = 35)
These output signals tell the external equipment that the inverter is running at a starting frequency or higher. If
assigned in negative logic (Active OFF), these signals can be used to tell the “Inverter being stopped” state.
These signals come ON when the inverter is running.
Under V/f control: These signals come ON if the
inverter output frequency exceeds the starting
frequency, and go OFF if it drops below the stop
frequency. The “RUN” signal can also be used as a
“Speed valid” signal.
Goes OFF during DC braking.
Comes ON even during DC
braking, pre-excitation, zero
speed control.
Frequency (speed) arrival “FAR” assignment (Function code data = 1), Frequency (speed) arrival 3
“FAR3” assignment (Function code data = 72)
These output signals come ON when the difference between the output frequency (detected speed) and reference
frequency (reference speed) comes within the frequency arrival hysteresis width specified by E30.
( Function code E30)
Frequency (speed) detected “FDT” assignment (Function code data = 2), Frequency (speed) detected
2 “FDT2” assignment (Function code data = 31), Frequency (speed) detected 3 “FDT3” assignment
(Function code data = 58)
These output signals FDT, FDT2 or FDT3 come ON when the output frequency (detected speed) exceeds the
frequency detection level specified by E31, E36 or E54, respectively, and go OFF when the output frequency
(detected speed) drops below the “Frequency detection level (E31, E36 or E54) - Hysteresis width (E32).”
( Function codes E31, E32)
Undervoltage detected (Inverter stopped) “LU” assignment (Function code data = 3)
This output signal comes ON when the DC link bus voltage of the inverter drops below the specified undervoltage
level. When this signal is ON, the inverter cannot run even if a run command is given. It goes OFF when the voltage
exceeds the level. The undervoltage protection function will be triggered, and the motor error stop (trip) status will
also turn ON.
Detected torque polarity “B/D” assignment (Function code data = 4)
The inverter issues the driving or braking polarity signal to this digital output judging from the internally calculated
torque or torque command. This signal goes OFF when the detected torque corresponds to driving, and it goes ON
when it corresponds to braking.
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