Samson 3787 Mounting And Operating Instructions page 50

Parameter description
FINAL_VALUE_CUTOFF_LO
Index: 16
Access: r, w
Range:
Default:
FINAL_VALUE_RANGE
Index: 14
Access: r
FINAL_POSITION_VALUE
Index: 17
Access: r
IDENT_BINARY_INPUT
Index: 44
Access: r, w
Input:
Default:
IDENT_FORCED_VENTING
Index: 43
Access: r
Display:
IDENT_LIMIT_SWITCHES
Index: 45
Access: r, w
Input:
Default:
INIT_METHOD
Index: 54
Access: r
Input:
Default:
50
EB 8383-1 EN
S Final position
if the set point falls below the entered value, the valve is moved towards the final
position that corresponds to 0 % of the manipulated variable. This is done by
completely venting or filling the actuator (depending on the fail-safe position).
–2.5 ... 100 %
1 %
Note: The function is cleared when –2.5 % is entered.
Since the actuator is completely filled or vented when this function is activated, the
control valve moves to its absolute final position. Limitations in the functions "travel
range" or "mechanical limit stops" do not apply here.
In case, impermissibly high positioning forces arise due to this, the function must be
cleared.
S This parameter contains the range of the manipulated variable (XD_SCALE) used in
the upstream connected Analog Output Function Block.
D Current valve stem position in the FINAL_VALUE_RANGE unit.
N Describes whether and how the binary input is evaluated:
NOT EVALUATED
ACTIVELY OPEN
ACTIVELY CLOSED
NOT EVALUATED
N Describes whether the option forced venting is activated:
NOT IMPLEMENTED
IMPLEMENTED
N Describes whether the option including the limit switches is installed. It is not
automatically recognized:
NOT IMPLEMENTED
IMPLEMENTED
Depends on the hardware
S Initialization method based on maximum range or on nominal range.
Only the range of manipulated variables below the rated travel/nominal angle is
taken into account on initialization based on nominal range (e.g. globe valve with a
mechanical limit stop on one side).
The maximum range of manipulated variable is used on initialization based on
maximum range (e.g. three-way valves with mechanical limit stops on both sides).
MAXIMUM RANGE
NOMINAL RANGE
MAXIMUM RANGE
Option not granted, input is not evaluated
Option granted, input is evaluated
Not installed
Installed
Initialization based on maximum range
Initialization based on nominal range