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HA0302T Rev A Feb 2016
Chapter 5
5.3.4 Advanced - Misc. Tab
Fig. 5.6 Advanced Miscellaneous Settings
Motor Output Settings
Current Limit
– The system incorporates a cu rrent 'foldback' facility, whereby the
continuous current level can be capped. The
Current Limit
parameter, accepts values as
a percentage of maximum peak current, in the range 0% to 100%, which is the default
maximum level set at the factory (this maximum value cannot be altered).
Energy Limit
– When the current output of the drive exceeds the limit set in the
Current
Limit
parameter, accumulation of the exc ess current energy begins. The
Energy Limit
parameter specifies a limit for this accumulated energy, as a percentage of the factory set
default maximum, in the range 0% to 100%. When the accumulated energy exceeds the
value specified in the
Energy Limit
parameter, a 'current foldback' condition is said to
exist, and the comma nded current is limite d to the value spec ified in the
Current Limit
parameter. When this occurs, the Current Foldback status bit (bit 25) is set in the Status
Register and the ‘Current Limit’ LED on the GUI panel is lit. When the acc umulated
energy above the
Current Limit
value falls to 0, the limit is removed and the status bit is
cleared.
Motor Limit
– This parameter sets a limit for the motor drive signal and accepts values in
the range 0 to 100% (32767). If the system produces a value greater than the limit set,
the motor command takes the limiting value. For example, if the
Motor Limit
is set to
30000 (91.6%), then signals greater than 30000 will be output as 30000 and values less
than -30000 will be output as -30000.
Caution
The default values programmed into the APT software will give acceptable
performance in most cases. The following parameters are set according to
the stage or actuator type associated with the driver and have already been
optimized. Changing these parameters can result in control instability and
possible damage. Use extreme caution if adjusting these parameters.
