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Fn_12:
Stall Prevention
xxx0:
Stall Prevention during Acceleration enable
xxx1:
Stall Prevention during Acceleration disable
xx0x:
Stall Prevention during Deceleration enable
xx1x:
Stall Prevention during Deceleration disable
x0xx:
Stall Prevention during Running enable
x1xx:
Stall Prevention during Running disable
0xxx:
Stall Prevention Decel Time set in (
Fn_02
)
1xxx:
Stall Prevention Decel Time set in (
Fn_15
)
Fn_13:
Stall Prevention Level during Accel:
30% - 200%
Fn_14:
Stall Prevention Level during Run:
30% - 200%
Fn_15:
Stall Prevention Level during Decel:
0.1 – 3600 sec
Note:
1. If the Acceleration Time in (
Fn_01
) is set too fast for the size of the load, an Overcurrent Trip
“OC-A” may occur during the acceleration period. Setting the proper Stall Prevention Level
(
Fn_13
) during acceleration can automatically extend the ramp time to prevent Overcurrent Trip
when acceleration time is too short.
2. If the Deceleration Time in (
Fn_02
) is set too short, an Overvoltage “OV” condition may occur
on the DC BUS. Setting the proper Stall Prevention Level (
Fn_15
) during deceleration can
prevent an “OV” trip when deceleration time is too short.
3. In order to prevent abnormal overload trips during heavy running periods, the Inverter can lower
the output frequency in accordance with the Deceleration Time set by (
Fn_02
) or (
Fn_15
) when
(
Fn_12
) is (1xxx) or when operational current is over the value set in (
Fn_14
). The Inverter will
return to its normal operating frequency automatically after the current is back to normal
conditions.
