Commander GP User Guide
Issue code: gpxu2
Getting Started 2-15
2.8 Setting up operating limits
Minimum and maximum frequencies
Warning
Do not set the maximum
frequency at a value that is
excessive for the motor.
If the intended maximum
frequency affects the safety of
the machinery, additional
independent over-speed
protection must be used.
Set parameter 0.02 Maximum frequency at the
required value. When initially setting up the Drive,
leave 0.01 Minimum frequency at the default value of
zero so that the motor shaft does not rotate as
soon as a
RUN command is received. When it is
known to be safe to do so, set 0.01 at the required
value.
Note the following:
• Slip compensation can cause the output
frequency of the Drive to exceed [0.02].
Caution
For operation at motor speeds
greater than twice base speed,
contact the supplier of the
motor.
Default values and range
0.01 Default value Range Unit
0 0 ~ [0.02] Hz
0.02 Default value Range Unit
50 Hz (EUR)
60 Hz (USA)
0 ~ 1000 Hz
Acceleration rate
To adjust the acceleration rate, adjust parameter
0.03 Acceleration rate. Increase the value to
increase the time taken for acceleration (ie. reduce
the acceleration rate).
Range Default Unit
0 ~ 3200 5 s/100Hz
If the required acceleration cannnot be achieved, it
may be necessary to increase the value of
0.06 Current limit.
Deceleration rate
To adjust the deceleration rate, adjust parameter
0.04 Deceleration rate. Increase the value to
increase the time taken for deceleration (ie. reduce
the deceleration rate).
Range Default
0 ~ 3200 10
If the Drive trips when decelerating the motor and
the display indicates OU, this indicates that the
maximum permissible
DC-bus voltage has been
exceeded during braking. Increase the value of
0.04 Deceleration rate or, if a braking resistor is not
currently connected, return to Planning the
installation in Chapter 2 Installing the Drive in the
Installation Guide for instructions on connecting a
braking resistor.
Braking resistor
Warning
The Drive does not contain a
braking resistor; when
required, an external
braking resistor must be
used (see the Installation
Guide).
Depending on the setting of
parameter 0.15, failure to
connect a braking resistor
when one is required may
result in deceleration times
being extended or the Drive
tripping during braking
which would leave the
motor free to coast.
If a braking resistor is being used, set the following
parameter at FASt in order to prevent instability:
Macro Parameter
0 2 3 4
0.15 Ramp mode selector
1 5 6 7 See the Commander Gp Advanced User Guide
For Macros 1 and 5, the Note at the beginning of
Enabling Macro 1 earlier in this chapter gave
instructions for changing the setting of this
parameter. When Macro 6 or 7 is enabled, the
setting is made automatically. See 0.15 Ramp mode
selector in Appendix D Menu 0 Parameters.
