33
100%
0%
100%
0%
100%
0%
100%
0%
Biffi
ICON 2000
InstructIon and operatIng manual
The curves below may better clarify the above
option:
example a
With input signal = 4 mA, the position request
is 0% and the actuator is driven to close. With
input signal = 20 mA, the position request is
100% and the actuator is driven to open. With
input signal = 12 mA the position request
is 50% and the actuator is driven to reach
position 50%.
example B
With input signal < 8 mA, the position request
is 0% and the actuator is driven to close. With
input signal = 16 mA, the position request is
100% and the actuator is driven to open. With
input signal = 12 mA the position request
is 50% and the actuator is driven to reach
position 50%.
example c
With input signal = 4 mA , the position request
is 100% and the actuator is driven to open. With
input signal = 20 mA, the position request is 0%
and the actuator is driven to close� With input
signal = 12 mA the position request is 50% and
the actuator is driven to reach position 50%.
example d
With input signal < 8 mA, the position request
is 100% and the actuator is driven to open. With
input signal = 16 mA , the position request is 0%
and the actuator is driven to close� With input
signal = 12 mA the position request is 50% and
the actuator is driven to reach position 50%.
exaMple a
Position request %
Input signal
4 20 mA
Configured values:
% min = 0%
% max = 100%
Polarity : 4 mA = CL
exaMple B
Position request %
Input signal
4 8 16 20 mA
Configured values:
% min = 25%
% max = 75%
Polarity : 4 mA = CL
exaMple c
Position request %
Input signal
4 20 mA
Configured values:
% min = 0%
% max = 100%
Polarity : 4 mA = OP
exaMple d
Position request %
Input signal
4 8 16 20 mA
Configured values:
% min = 25%
% max = 75%
Polarity : 4 mA = OP
configuration procedure
• Move the local selector to OFF and then
simultaneously press OPEN and STOP� Select
the language and then enter the password
according to the instructions (see Entering
the set-up mode)� When the message
displayed is “SET-UP MODE OK?” press
yES� Press yES to select the actuator set-up
menu, press NO to scroll the list of available
routines and then press yES to select
POSITIONER�
• Press YES if the configured value of the
Dead Band is correct (from “position
resolution %” to 25.5%), or press NO to
change it, then press yES�
• Press YES if the configured value of the
Polarity is correct (4 mA=CL or 4 mA=OP), or
press NO to change it, then press yES�
• Press YES if the configured value of the
Motion Inhibit Time is correct (from 1 to
255 sec), or press NO to change it, then
press yES�
• Press YES if the configured value of the
% MIN is correct (from 0 to 75%), or press NO
to change it, then press yES� The standard
value is 0�
• Press YES if the configured value of the
% MAX is correct (from 25 to 100%), or
press NO to change it, then press yES� The
difference between % MAX and % MIN should
be greater than 25%. The standard value
is 100�
9.1.8 fail safe
This function configures the actuator action in
case of loss of the 4-20 mA input or bus signals�
This action only takes place if the local selector
is in REMOTE and if the positioning function or
the bus interface are active� When the 4-20 mA
or bus signal is restored, the ICON 2000
resumes its normal functioning� The Interlock
and ESD controls override the fail Safe action
according to the following diagram:
OP/CL controls
Lowest priority
Highest priority
fail Safe action
Interlocks
ESD
The following options can be configured:
- Action: open, close, stay-put, go to position %,
no action (Off)�
- Delay: time before than the fail Safe action
takes place�
