5.3 Description of Function Codes 5.3.2 E codes (Extension terminal functions)
Overload early warning/Current detection (level and timer)
Related function codes:
E37, E38 (Current detection 2/Low current detection level and timer)
E55, E56 (Current detection 3, level and timer)
These function codes define the detection level and time for the Motor overload early warning “OL”, Current
detection “ID”, Current detection 2 “ID2”, Current detection 3 “ID3”, Low current detection “IDL”, and Low current
detection 2 “IDL2” output signals.
E20 to E24, E27
assignment data
“IDL” and “RUN” AND signals
• Data setting range
Operation level: 0.00 A (disable), current value of 1 to 200% of inverter rated current set in A (ampere) units
Motor characteristics 1: Enable (For a general-purpose motor with shaft-driven cooling fan)
2: Enable (For an inverter-driven motor, non-ventilated motor, or motor with separately
powered cooling fan)
Motor overload early warning signal – “OL”
The OL signal is used to detect a symptom of an overload condition (alarm code 0l1) of the motor so that the user
can take an appropriate action before the alarm actually happens. The OL signal turns ON when the inverter output
current exceeds the level specified by E34. In typical cases, set E34 data to 80 to 90 % against F11 data (Electronic
thermal overload protection for motor 1, Overload detection level). Set the temperature characteristics of the motor
with electronic thermal (motor characteristics selection, thermal time constant).
Current detected, Current detected 2 and Current detected 3 – “ID”, “ID2” and “ID3”
When the inverter output current exceeds the level specified by E34, E37 or E55 for the period specified by E35,
E38 or E56, the ID, ID2 or ID3 signal turns ON, respectively. When the output current drops below 90 % of the
specified detection level, the ID, ID2 or ID3 turns OFF. (The minimum ON-duration is 100 ms.)
Fig. 5.3-21
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