Chapter 5 Function Code Table
- 74 -
Function
Code
Parameter Name Function Description Setting Range Default
bE.11
Selection of low
voltage protection
These two parameters are used to set the low
voltage protection function.
When the bus voltage suffers reduction peak,
the AC drive performs protection automatically to
prevent hook gliding.
bE.11 = 1: Low voltage protection enabled
bE.11 = 0: Low voltage protection disabled
bE.12 is used to set the bus voltage, at which the
low voltage protection is enabled.
When the bus voltage is smaller than (bE.12 x
rated motor voltage), this function is enabled. This
moment the output function 10 becomes active, the
AC drive directly outputs the brake apply frequency
and performs the brake apply time sequence to
forbid restart.
When the bus voltage recovers to (bE.12 x rated
motor voltage + 20 V), the low voltage protection is
disabled.
Time
Normal bus voltage
Bus voltage
Output
frequency
Protective voltage
Protective voltage + 20 V
Brake apply frequency
RUN command
Output function 10
At least 5s output
Time
Low voltage protection enabled
0, 1 0
bE.12 Low voltage protection
threshold
1.00 to 1.30 1.05