Delta Electronics VFD-M Series, User Manual

Page: 51 / 173

Chapter 4 Parameters
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4-16 Revision May 2008, ME14, SW V3.04
Frequency Hold
Applications Purpose Functions
Related
Parameters
General application
Acceleration/
deceleration pause Hold output frequency during
Acceleration/deceleration Pr.39~Pr.42
Auto Restart after Fault
Applications Purpose Functions
Related
Parameters
Air conditioners,
remote pumps
For continuous and
reliable operation
without operator
intervention
The AC motor drive can be
restarted/reset automatically up to 10
times after a fault occurs.
Pr.72
Pr.113
Emergency Stop by DC Braking
Applications Purpose Functions
Related
Parameters
High-speed rotors
Emergency stop
without brake
resistor
AC motor drive can use DC braking
for emergency stop when quick stop is
needed without brake resistor. When
used often, take motor cooling into
consideration. Pr.28
Pr.30
Pr.31
Over-torque Setting
Applications Purpose Functions
Related
Parameters
Pumps, fans and
extruders
To protect
machines and to
have continuous/
reliable operation
The over-torque detection level can be
set. Once OC stall, OV stall and over-
torque occurs, the output frequency
will be adjusted automatically. It is
suitable for machines like fans and
pumps that require continuous
operation. Pr.60~Pr.62
Upper/Lower Limit Frequency
Applications Purpose Functions
Related
Parameters
Pump and fan
Control the motor
speed within
upper/lower limit
When user cannot provide
upper/lower limit, gain or bias from
external signal, it can be set
individually in AC motor drive. Pr.36
Pr.37