Omron SX inverter manual

from one VSD and then move the control panel to
another VSD and download the settings.
NOTE: Load from and copy to the VSD is only possible
when the VSD is in stop mode.
VSD
The max and min alarm can be set for a trip condition.
The pre-alarms act as a warning condition. All the
alarms can be monitored on the digital or relay outputs.
The autoset function automatically sets the 4 alarm
levels whilst running: maximum alarm, maximum prealarm,
minimum alarm and minimum pre-alarm.
Fig. 34 gives an example of the monitor functions for
constant torque applications.
Fig. 33 Copy and load parameters between VSD and control
panel
7.5 Load Monitor and Process
Protection [400]
7.5.1 Load Monitor [410]
The monitor functions enable the VSD to be used as a
load monitor. Load monitors are used to protect
machines and processes against mechanical overload
and underload, such as a conveyer belt or screw conveyer
jamming, belt failure on a fan or a pump dry running.
The load is measured in the VSD by the
calculated motor shaft torque. There is an overload
alarm (Max Alarm and Max Pre-Alarm) and an underload
alarm (Min Alarm and Min Pre-Alarm).
The Basic Monitor type uses fixed levels for overload
and underload (pre-)alarms over the whole speed
range. This function can be used in constant load
applications where the torque is not dependent on the
speed, e.g. conveyor belt, displacement pump, screw
pump, etc.
For applications with a torque that is dependent on the
speed, the Load Curve monitor type is preferred. By
measuring the actual load curve of the process, characteristically
over the range of minimum speed to
maximum speed, an accurate protection at any speed
can be established.
40 Main Features Omron SX inverter manual