5.3 Description of Function Codes 5.3.2 E codes (Extension terminal functions)
Inverter output limiting “IOL” assignment (Function code data = 5), Inverter output limiting with delay
“IOL2” assignment (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)
• Overload stop function (J65)
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” assignment (Function code data = 6)
This output signal is ON either during continuous running after a momentary power failure or during the period after
the inverter detects an undervoltage condition and shuts down the output until restart has been completed (the
output has reached the reference frequency).
( Function code F14)
Motor overload early warning “OL” assignment (Function code data = 7)
The OL signal is used to detect a symptom of an overload condition (alarm code 0l1 to OL4) of the motor so that
the user can take an appropriate action before the alarm actually happens.
( Function code E34)
Performing keypad operation “KP” assignment (Function code data = 8)
An ON signal is output when run commands ( , keys) from the keypad are valid.
Inverter ready to run “RDY” assignment (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. “RDY” OFF conditions are shown in the following table.
Running in restart after momentary power failure operation mode (IPF signal ON)
Terminal [BX] ON (coast to stop status)
Terminal [BATRY] ON (performing battery operation)
OFF across terminal [EN1] and [PLC], or across [EN2] and [PLC]
Commercial power supply/inverter operation switching “SW88”, “SW52-2”, “SW52-1” assignment
(Function code data = 11, 12, 13)
A magnetic contactor is controlled with built-in sequences to switch between commercial power supply operation
and inverter operation by selecting external command “ISW50” or “ISW60”. Refer to the explanation on
“ISW50”/”ISW60” for details.
( Function codes E01 to E09 data = 40, 41)
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