Bernard Controls SQ Intelli+ Serie Instructions De Mise En Service page 53

24.2 Setting of the deadband value
The deadband value is the maximum allowable difference between the
signal and the actuator position when no action occurs. This setting is made
at the factory, but it is possible to adjust it.
If the deadband is too narrow, the actuator could start hunting, i.e opening
and closing around the expected position without being able to stabilize. If
the deadband is too wide, positioning actions are less precise.
The default deadband setting is 1%.
Select dead band % in the POSITIONER menu and turn to OK to
confirm.
Use the blue selector to increase or decrease the value and turn to
OK to confirm.
24.3 Fail-safe position
When a 4-20 mA input signal is used, it is possible to set up a fail-safe
position for use if the control signal is lost.

This function cannot be used with 0-20 mA signals, as the system
cannot distinguish between a lost signal and a 0 mA value.
This function is active in the standard configuration, and the actuator
remains in position if the signal is lost.
The user can also choose open or close.
Select lost signal in the POSITIONER
menu and turn to OK to confirm.
Select the action required and turn to OK
to confirm.
24.4 Proportional pulse mode
INTELLI+ features a positioning mode which takes the actuator's inertia in
account. If the movement time is too short or if the motor has excessive
inertia, positioning can be improved by selecting proportional pulse mode.
INTELLI+ calculates & adapts the motor's stopping point to reach the
expected position & applies pulses proportional to any deviation if needed.
This mode is used for relatively stable control actions where partial
compensation can be made the actuator's inertia. The actuator is cycled
more often than with a standard command.
Select proportional pulse in the POSITIONER menu and turn to OK to
confirm.
Select (no) or (yes) and turn to OK to confirm.
English
LOST SIGNAL
(closing)
(stayput)
(opening)
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