Hitachi L100 Instruction Manual page 79

Overload Restriction
Func.
Code
B21
B22
B23
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When the inverter output current exceeds a
preset current level you specify, the
overload restriction feature arbitrarily
reduces the output current. This feature
does not generate an alarm or trip event.
You can instruct the inverter to apply
overload restriction only during constant
speed, thus allowing higher currents for
acceleration. Or, you may use the same
threshold for both acceleration and
constant speed.
When the inverter detects an overload, it must decelerate the motor to reduce the current
until it is less than the threshold. You can choose the rate of deceleration that the inverter
uses to lower the output current.
"B" Function
Name
Overload restriction Select the operating mode
operation mode during overload conditions,
three options, option codes:
00... Disabled
01... Enabled for acceleration
and constant speed
02... Enabled for constant
speed only
Overload restriction Sets the level for overload
setting restriction, between 50% and
150% of the rated current of
the inverter, setting resolution
is 1% of rated current
Deceleration rate at Sets the deceleration rate when
overload restriction inverter detects overload, range
is 0.1 to 30.0, resolution is 0.1.
NOTE: For inverter models 005NFE, 011NFE, and 030HFE, the thermal value is less
than the rated amperes (is the same as models 004NFE, 007NFE, and 040HFE respec-
tively). Therefore, be sure to set the electronic thermal overload according to the actual
motor driven by the particular inverter.
Motor
Current
0
Output
frequency
Run-
time
Description
Edit
L100 Inverter
restriction area
B22
time
B23
Defaults DOP,DRW,DOP+
EU/ Func.
Units Name
US Code
01 — F24 OLOAD
MODE
rated A F24 OLOAD
Amps LVL
*1.25
See
*Note
1.0 — F24 OLOAD
CONST
3–23
V