Frequency Detected - Fdt; Under Voltage Detected - Lu; Inverter Output Limiting - Iol; Auto-Restarting After Momentary Power Failure - Ipf - FujiFilm FVR-Micro Instruction Manual

 Frequency detected -- FDT (Function code data = 2)
This output signal comes ON when the output frequency exceeds the frequency detection level
specified by E31, and it goes OFF when the output frequency drops below the "Frequency detection
level (E31) - Hysteresis width (E32)."
 Under voltage detected -- LU (Function code data = 3)
This output signal comes ON when the DC link bus voltage of the inverter drops below the specified
under voltage level, and it goes OFF when the voltage exceeds the level.
This signal is ON also when the under voltage protective function is activated so that the motor is in
an abnormal stop state (e.g., tripped).
When this signal is ON, a run command is disabled if given.
 Inverter output limiting -- IOL (Function code data = 5)
This output signal comes ON when the inverter is limiting the output frequency by activating any of
the following actions (minimum width of the output signal: 100 ms).
• Current limiting by software (F43 and F44)
• Instantaneous overcurrent limiting by hardware (H12 = 1)
• Automatic deceleration (Anti-regenerative control) (H69 = 2 or 4)
When the IOL signal is ON, the output frequency may have deviated from the
specified frequency because of the limiting function above.
 Auto-restarting after momentary power failure -- IPF (Function code data = 6)
This output signal is ON either during continuous running after a momentary power failure or during
the period from when the inverter has detected an under voltage condition and shut down the output
until restart has been completed (the output has reached the reference frequency).
To enable this IPF signal, set F14 (Restart mode after momentary power failure) to "4" (Enable restart
(Restart at the frequency at which the power failure occurred)) or "5" (Enable restart (Restart at the
starting frequency)) beforehand.
 Motor overload early warning -- OL (Function code data = 7)
This output signal is used to issue a motor overload early warning that enables you to take a
corrective action before the inverter detects a motor overload alarm
(Refer to the description of E34.)

For details about the judgment on service life, refer to Table 7.3 "Criteria for Issuing a
Lifetime Alarm" in Chapter 7, Section 7.3 "Standard lifetime of Parts"
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0l1 and shuts down its output.