Franklin Electric Cerus X-Drive, Installation And Operation Manual

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OPERATION
Control Options
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Minimum Run [ADV–34]: Range from 0 to 6000 seconds. When set to 0 sec, it is disabled.
When set to value greater than 0 and VFD is started in Auto mode, Minimum Run timer will start counting.
During timer counting, VFD will continue to run even if start command is removed.
Shutdown feature will override this timer.
Backspin Timer
The Backspin timer is designed to protect the VFD from tripping when starting a reverse spinning motor
caused by water backflow through a pump (no check valve) right after it was stopped.
Set the following parameter to activate this feature:
Backspin Timer [ADV–30]: Range from 0 to 6000 seconds. When set to 0 sec, it is disabled.
When set to value greater than 0 and VFD stops, Backspin timer will start counting. During backspin time,
VFD is disabled and cannot be started in Hand or Auto mode.
Performance Control Features
Acceleration/Deceleration Control
Standard Rates
The VFD accelerates and decelerates a motor at a controlled rate based on the following parameters:
Accel Time [SET–11]: Time in seconds for the drive to accelerate from 0 Hz to maximum frequency.
Decel Time [SET–12]: When Stop Mode [SET–16] is set to Decelerate, time in seconds to slow down from maxi -
mum frequency to 0 Hz.
The defaults for these parameters are determined by the
Application [SET–00] setting, but can be adjusted as
required.
IMPORTANT: Setting acceleration or deceleration times that are too short may trigger over-current or over-
voltage faults. Use of a suitable brake resistor can help with short deceleration times.
Change by Frequency
Acceleration and deceleration speeds can be modified when
the VFD reaches a target frequency. For example: It may be
desirable to start a motor quickly, as with a submersible
pump, and then slow the response at higher speeds.
The VFD starts at the Standard rate and switches to
Second
ACC [SET–54] and Second DCC [SET–55] when it reaches ACC Change
Freq [SET–53].
When the VFD decreases frequency below
[SET–53]-[SET–56] it will switch back to the Standard rates.
ACC Change Freq [SET–53]: Frequency to switch from first
acceleration/deceleration rate to second acceleration/
deceleration rate.
Second ACC [SET–54]: Time in seconds for drive to accelerate from 0 Hz to maximum frequency. This rate
takes effect when frequency is above
[SET–53]
. Default = 60 sec.
Second DEC [SET–55]: When Stop Mode [SET–16] is set to Decelerate, time in seconds to slow down from max -
imum frequency to 0 Hz. This rate takes effect when frequency is above
[SET–53]
. Default = 60 sec.
ACC/DEC Hyster [SET–56]: Hysteresis added to [SET–53] in changing the deceleration rate. This setting is
subtracted from
[SET–53]
to delay the switch back to the
[SET–12]
rate. Default = 1.0 Hz.
Hz
Hi Hz Limit
Lo Hz Limit
SET–53
SET–56
Time
2nd Accel/Decel
1st Accel/Decel