7-8-5 Overcurrent Suppression Function
This function suppresses the overcurrent caused by a steep current increase due to an impact load etc.
It
causes
the
inverter
to
stop
accelerating
when
the
output
current
reaches
approximately
180%
of
the
rated
current.
•
If setting the Overcurrent Suppression Selection (b027) to 01 (Enabled) still causes an overcurrent,
set it to 02 (Reduced voltage startup). This setting reduces the output voltage and moreover sup-
presses the overcurrent at the startup after a temporal stop.
•
Even during overcurrent suppression, input from the STOP/RESET key will be accepted.
•
Although the overcurrent suppression function is enabled, an overcurrent trip may occur due to short
circuit or equivalent.
Output current
180% of rat
current
Time
Time
7-8-6 External Trip (EXT)
Use this signal to have the inverter trip via an error signal generated by a peripheral system. To do so,
set the Multi-function Input 1 to 7 Selection (C001 to C007) to 12 (EXT).
When the EXT terminal turns ON, the inverter trips with the alarm code E12 displayed and shuts off its output.
Once the inverter trips with the alarm code E12 displayed, the trip status will not be reset even if the
error signal is reset from external equipment (the terminal EXT is turned OFF).
In this case, perform the reset operation or cycle the power supply to reset the trip.
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