Overcurrent Restraint (B027) - Hitachi L700 SERIES Instruction Manual

(2) Overload nitice 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)
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
C041
C111
setting b022/b025
C041/C111
Function code Data or range of data
b027
Chapter 4 Explanation of Functions
Enabling the warning output during
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
0.1 to "1.5 x rated
OL signal (overload notice advance signal
current" (A)
(1))
0.0 Disabling the warning output
Specifying the current at which to output the
0.1 to "1.5 x rated
OL2 signal (overload notice advance signal
current" (A)
(2))
00 Disabling the overcurrent restraint
01 Enabling the overcurrent restraint
4 - 41
Description
Related code
b027: Overcurrent suppression enable
Description