5-57
E34, E35
E37, E38
Overload Early Warning/Low Current Detection (Level and Timer)
Current Detection 2 (Level and Timer)
These function codes define the detection level and timer for the
OL
("Motor overload early
warning"),
ID
("Current detected"),
ID2
("Current detected 2") and
IDL
("Low current
detected") output signals.
Detection level
Timer
Motor
characteristics
Thermal time
constant
Output
signal
Data
assigned
to output
terminal
Range:
See below
Range:
0.01 to 600.00 s
Range:
See below
Range:
0.5 to 75.0 min
OL
7 E34
--
F10 F12
ID
37 E34
E35
ID2
38 E37
E38
IDL
41 E34
E35
-- --
- Data setting range
Operation level: 0.00 (Disable), 1 to 200% of inverter rated current
Motor characteristics 1: Enable (For a general-purpose motor and Fuji standard
permanent magnet synchronous motor with shaft-driven cooling
fan)
2: Enable (For an inverter-driven 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 has exceeded 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). Specify also the thermal characteristics of
the motor with F10 (Select motor characteristics) and F12 (Thermal time constant). To utilize
this feature, you need to assign
OL
(data = 7) to any of the digital output terminals.
Current detected and Current detected 2 signals --
ID
and
ID2
When the inverter output current has exceeded the level specified by E34 or E37 and it
continues longer than the period specified by E35 or E38, the
ID
or
ID2
signal turns ON,
respectively. When the output current drops below 90% of the rated operation level, the
ID
or
ID2
turns OFF. (Minimum width of the output signal: 100 ms)
To utilize this feature, you need to assign
ID
(data = 37) or
ID2
(data = 38) to any of digital
output terminals.