132
Atlas® Digital Amplifier Complete Technical Reference
6
SetCurrentFoldback (cont.)
41
h
GetCurrentFoldback
42
h
Description
(cont.)
The
Continuous Current Limit
is used by the current foldback algorithm. When the current output of the
drive exceeds this setting, accumulation of the I
2
energy above this setting begins. Once the accumulated
excess I
2
energy exceeds the value specified by the
Energy Limit
parameter, a current foldback condition
exists and the commanded current will be limited to the specified
Continuous Current Limit.
When this
occurs, the Current Foldback bit in the Event Status and Drive Status registers will be set. When the
accumulated I
2
energy above the
Continuous Current Limit
drops to zero (0), the limit is removed, and
the Current Foldback bit in the Drive Status register is cleared.
SetEventAction
can be used to configure a change in operating mode when current foldback occurs.
Doing this does not interfere with the basic operation of Current Foldback described above. If this is
done, the Current Foldback bit in the Event Status register must be cleared prior to restoring the
operating mode, regardless of whether the system is in current foldback or not.
When current control is not active, a current foldback event always causes a change to the disabled state
(all loops and motor output are disabled), regardless of the programmed Event Action. Changing the
operating mode from disabled requires clearing of the Current Foldback bit in Event Status.
GetCurrentFoldback
gets the maximum continuous current setting.
Restrictions
Values of
Continuous Current Limit
greater than the factory setting for maximum continuous current are
not allowed.
see
GetEventStatus
,
ResetEventStatus
,
GetDriveStatus
RestoreOperatingMode
GetActiveOperatingMode
