Hitachi SJ700D-004L, Instruction Manual

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Chapter 4 Explanation of Functions
4-40
(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 Function code Data or range of data Description
Overload signal output
mode
C040
00
Enabling the warning output during
acceleration, deceleration, and constant
01 Enabling the warning output during constant
Overload level setting C041
0.0 Disabling the warning output
CT mode
0.0 to 2.00 x rated current
<0.0 to 1.80 x rated current>
VT mode
0.0 to 1.50 x rated current
<0.0 to 1.50 x rated current>
Specifying the current at which to output the
OL signal (overload notice advance signal (1))
Overload setting (2) C111
0.0 Disabling the warning output
CT mode
0.0 to 2.00 x rated current
<0.0 to 1.80 x rated current>
VT mode
0.0 to 1.50 x rated current
<0.0 to 1.50 x rated current>
Specifying the current at which to output the
OL2 signal (overload notice advance signal (2))
(NOTE) <>:applied for 75 to 150kW
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 Function code Data or range of data Description
Overcurrent suppression
enable
b027
00 Disabling the overcurrent restraint
01 Enabling the overcurrent restraint
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.
Overload restriction
setting b022/b025
Overload level setting
C041/C111
Output current
OL/OL2 output
b027: Overcurrent suppression enable
Related code