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BIFFI FAIL SAFE ELECTRIC ACTUATORS, MODEL EFS2000V4
InstructIon and operatIng Manual
13.1.2 Torque set-up
The output torque limits to close or to open
may be configured between 40% and 100%
of the nominal torque stated on the actuator
nameplate.
Set-up procedure
• Move the local selector to OFF and then
simultaneously press OPEN and STOP within
20 sec (see chapter ‘Local controls, entering
the set-up mode’). Select the language and
then enter the password according to the
instructions. When the message displayed is
‘SET-UP MODE OK?’ press YES. Press YES
to select the actuator set-up menu, press
NO and then press YES to select the torque
set-up routine.
• Press YES if the opening torque limit is
correct, press NO to scroll the list of available
values. Press YES when the value is correct.
• Press YES if the closing torque limit is
correct, press NO to scroll the list of available
values. Press YES when the value is correct.
13.1.3 EFS set-up
The EFS setup routine allows configuring the
parameters of EFS and of PST functions. The
following parameters relevant to EFS function
can be set:
• ICON power-fail: enabled or disabled.
• Selector in OFF: enabled or disabled.
• Auto reset: enabled or disabled.
• Reset delay: from 1 to 255 sec. The
recommended value is greater than 1.5 times
the maximum valve stroke time during EFS
action.
The following parameters relevant to PST
function can be set:
• PST mode: OFF, AUTO, MANUAL.
• OFF: PST not used.
• AUTO: PST cycle carried out automatically
and cyclically with time interval set by the
parameter PERIOD and at the time set by the
parameter HOUR of DAY.
• MANUAL: PST cycle carried out on receiving
of a remote hardwired or bus command or by
a local command available in the VIEW and
SETUP menu, maintenance functions.
• MAN-AUTO: both automatic and manual
mode are available.
• SPRING action: spring to open or spring to
close.
Set-up procedure
EFS Set-up
• Move the local selector to OFF and then
simultaneously press OPEN and STOP within
20 sec (see chapter ‘Local controls, entering
the set-up mode’). Select the language and
then enter the password according to the
instructions. When the message displayed is
‘SET-UP MODE OK?’ press YES. Press YES to
select the actuator set-up menu, press NO to
select the list of available routines. Press YES
to select ‘EFS SETUP’.
• Press YES if the parameter ‘ICON power-fail’
is correct, press NO to change. Press YES
when the value is correct.
• Press YES if the parameter ‘Selector in OFF’
is correct, press NO to change. Press YES
when the value is correct.
• Press YES if the parameter ‘AUTORESET’ is
correct, press NO to change. Press YES when
the value is correct.
• Press YES if the parameter ‘Reset delay’ is
correct, press NO to scroll the list of available
values. Press YES when the value is correct.
• Press YES to enter in the PST SETUP, press
NO to return to EFS SETUP. Press NO to
move to next routine.
• PERIOD: time interval between PST, in days
from 1 to 1000, in PST AUTO mode.
• HOUR of DAY: hour of PST, in hour from 0 to
23, in PST AUTO mode.
• PST TRAVEL: position change during PST
cycle, in % of position from 10 to 40.
• MAX T-PST: max time allowed changing the
position of PST TRAVEL due to spring action,
measured in %, from 1 to 1000% of relevant
BASELINE time.
• MAX PST T-RET: max time to return to initial
position by the electrical actuator, measured
in %, from 1 to 1000% of relevant BASELINE
time.
• PAUSE: time of current position of actuator
after spring action and before command to
return to initial position, in sec, from 2 to 255.
• MAX PST OV-TR: max position over-travel
allowed during PST cycle, in percentage of
position, from 1 to 100.
The function of each parameter is described in
the chapter ‘EFS operation’.
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