Fuji Electric FRENIC-HVAC User Manual page 420

Inverter output limiting -- IOL (Function code data = 5)

Inverter output limiting with delay -- IOL2 (Function code data = 22)
The output signal IOL 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). The
output signal IOL2 comes ON when any of the following output limiting operation continues
for 20 ms or more.
• Torque limiting (F40, F41, E16 and E17, Maximum internal value)
• Current limiting by software (F43 and F44)
• Instantaneous overcurrent limiting by hardware (H12 = 1)
• Automatic deceleration (Anti-regenerative control) (H69)
When the IOL is ON, it may mean that the output frequency may have deviated
from the reference frequency because of the limiting functions 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 detects an undervoltage condition and shuts down its
output until the completion of a restart sequence (until the output reaches the reference
frequency).
 Refer to F14.
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 an
corrective action before the inverter detects a motor overload alarm OL1 and shuts down its
output.
 Refer to E34.
Inverter ready to run -- RDY (Function code data = 10)

This output signal comes ON when the inverter becomes ready to run by completing hardware
preparation (such as initial charging of DC link bus capacitors and initialization of the control
circuit) and no protective functions are activated.
Switch motor drive source between commercial power and inverter output

-- SW88, SW52-2 and SW52-1 (Function code data = 11, 12, and 13)
Assigning these output signals to transistor output terminals [Y1], [Y2], [Y3] and [Y4]
enables the terminal command ISW50 or ISW60 that controls the magnetic contactor for
switching the motor drive source between the commercial power and the inverter output
according to the integrated sequence.
 Refer to E01 through E07 (data = 40 and 41).
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