5-39
Undervoltage detected--LU
(Function code data = 3)
This signal is turned on when the DC link bus voltage of the inverter drops below the
specified level or when the motor stops due to activation of the undervoltage pro-
tection feature (undervoltage trip). It is turned off if the DC link bus voltage exceeds
the specified level.
Inverter output limiting--IOL
(Function code data = 5)
This signal is turned on when the inverter is limiting the motor drive current by ac-
tivating the current limiter of either software (F43: Mode selection, F44: Level) or
hardware (H12 = 1: Enable). The minimum ON-duration is 100 ms.
Auto-restart after momentary power failure--IPF
(Function code data = 6)
This signal is turned on during the period from when the inverter detects the un-
dervoltage of the DC link bus and stops the output (if auto-restart after recovery of
power is selected (F14 = 4 or 5)) until auto-restarting (the output frequency has
recovered up to the reference frequency). At that moment of auto-restarting, this
signal is turned off.
Motor overload early warning--OL
(Function code data = 7)
This signal is used to issue a motor overload early warning for enabling you to take
corrective action before the inverter detects a motor overload (
0l1
alarm) and
stops its output.
The motor temperature characteristics are specified by function codes F10 (Elec-
tronic thermal overload protection for motor) and F12 (Thermal time constant). If the
value calculated from the settings of F10 and F12 exceeds the detection level set by
Overload Early Warning/Current Detection/Low Current Detection (Level) (E34),
then this signal is turned on. Normally, the recommended set current level for E34 is
80 to 90% of the allowable current set by function code F11 (Overload detection
level).
Function code E34 is effective for not only the motor overload early
warning OL, but also for the operation level of the current detection ID and
low level current detection IDL.
Auto-resetting--TRY
(Function code data = 26)
This signal is turned on when the retry function specified by function codes H04
(Times) and H05 (Reset interval) is activated. Refer to function codes H04 and H05
for details of the output timing and number of retries.
Service lifetime alarm--LIFE
(Function code data = 30)
This signal is turned on when it is judged that the service life of any of capacitors
(DC link bus capacitor and electrolytic capacitor on the printed circuit board) and
cooling fan has expired.
To Next Page
Loading...
