Download Instruction Manual - Industrial Electric Systems

„ Torque limiter (Operating conditions) (H73)
H73 specifies whether the torque limiter is enabled or disabled during acceleration/deceleration and
running at constant speed.
Data for H73
During accelerating/decelerating
During running at constant speed
0
Enable
Enable
1
Disable
Enable
2
Enable
Disable
„ Torque limiter (Frequency increment limit for braking) (H76)
H76 specifies the increment limit of the frequency in limiting torque for braking. The factory default is 5.0 Hz.
If the increasing frequency during braking reaches the limit value, the torque limiters no longer function,
resulting in an overvoltage trip. Such a problem may be avoided by increasing the setting of H76.
The torque limiter and current limiter are very similar function each other. If both are activated
concurrently, they may conflict each other and cause hunting in the system. Avoid concurrent
activation of these limiters.
F42
H68
Drive Control Selection 1
Slip Compensation 1 (Operating conditions)
F42 specifies the motor drive control.
Data for
F42
Basic
control
Drive control
Speed
feedback
Speed control
Frequency control
V/f control with slip compensation inactive
0
1
Dynamic torque vector control
(with slip compensation and auto torque boost)
2
V/f control with slip compensation active
5
Vector control without speed sensor
6
Vector control with speed sensor
V/f
control
Vector
control
Disable
Frequency control with
slip compensation
Speed
estimation
Speed control with
speed regulator
Enable
For details about the motor drive control, refer to Chapter 4 "RUNNING THE MOTOR."
F43, F44
H12
Current Limiter (Mode selection, Level)
Instantaneous Overcurrent Limiting (Mode selection)
When the output current of the inverter exceeds the level specified by the current limiter (F44), the inverter
automatically manages its output frequency to prevent a stall and limit the output current.
The default setting is 160% and 130% for HD-mode inverters and LD-mode inverters respectively. (Once
the HD-mode or LD-mode is selected by F80, the current limit for each mode is automatically specified.)
If 160% (or 130%) or over of overcurrent instantaneously flows and the output frequency decreases by this
current limit that is undesired, consider increasing the current limit level.
If F43 = 1, the current limiter is enabled only during constant speed operation. If F43 = 2, the current limiter
is enabled during both of acceleration and constant speed operation. Choose F43 = 1 if you need to run the
inverter at full capability during acceleration and to limit the output current during constant speed operation.
„ Mode selection (F43)
F43 selects the motor running state in which the current limiter will be active.
Running states that enable the current limiter
Data for
F43
During acceleration
During constant speed
During deceleration
0
Disable
Disable
Disable
1
Disable
Enable
Disable
2
Enable
Enable
Disable
5-48