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Chapter 4
(2) Overload notice function
The overload notice function allows you to make the inverter output an overload notice signal before tripping because
of overload.
You can use this function effectively to prevent the machine (e.g., a conveyor)driven by the inverter from being
overloaded and prevent the conveyor from being stopped by the overload protection of the inverter.
To use this function, assign function "03" (OK) or "26" (OL2) to one of the intelligent output terminals [11] to [15]
(C021 to C025) and the alarm relay terminal (C026). (Two types of overload notice signal are available for output.)
Item
Overload signal output
mode
Overload level setting
Overload setting (2)
(NOTE) <>:applied for 75 to 150kW
Overload restriction
Overload level setting
Output current
OL/OL2 output
4.2.31 Overcurrent restraint
The overcurrent restraint function allows you to restrain the overcurrent that
can occur when the output current sharply increases because of rapid
acceleration.
You can enable or disable the function by setting the overcurrent suppression enable (b027).
Item
Overcurrent suppression
enable
Note: When using the inverter for a lift, disable the overcurrent restraint function. If the overcurrent restraint
functions during the lift operation, the lift may slide down because of insufficient torque.
Function code
Data or range of data
C040
CT mode
0.00 to 2.00 x rated current
C041
<0.00 to 1.80 x rated current>
VT mode
0.00 to 1.50 x rated current
<0.00 to 1.50 x rated current>
CT mode
0.00 to 2.00 x rated current
C111
<0.00 to 1.80 x rated current>
VT mode
0.00 to 1.50 x rated current
<0.00 to 1.50 x rated current>
setting b022/b025
C041/C111
Function code
Data or range of data
b027
Explanation of Functions
Enabling
00
acceleration, deceleration, and constant
01
Enabling the warning output during constant
0.0
Disabling the warning output
Specifying the current at which to output the
OL signal (overload notice advance signal (1))
0.0
Disabling the warning output
Specifying the current at which to output the
OL2 signal (overload notice advance signal (2))
00
Disabling the overcurrent restraint
01
Enabling the overcurrent restraint
4-40
Description
the
warning
output
Related code
b027: Overcurrent suppression enable
Description
during
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