Spirax Sarco SP8-10, Installation And Maintenance Instructions Manual

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IM-P707-01 CTLS Issue 1
57
SP8-10 Smart positioner
5.1.18 Set point
Menu/parameter Value range Description
SP Range Min. 4.0 to 18.4 mA
The set point range is the range of the input current as a
percentage of the operating range of the fittings from 0 to 100 %.
Use parameter ‘0’ to specify the lower limit for the set point range.
SP Range Max. 5.6 to 20.0 mA
The set point range is the range of the input current as a
percentage of the operating range of the fittings from 0 to 100 %.
Use parameter ‘100’ to specify the upper limit for the set point
range.
Note:
The configured set point range must not be smaller than 20 %
(3.2 mA).
SP Filter 0 to 120 seconds Use this parameter to set a damping value for the set point signal.
SP Ramp Up
Off up to 0 to 200
seconds
Here the stroke time for the actuator can be increased.
A set point change is not directly transferred to the positioner;
instead, the speed is reduced accordingly.
SP Ramp Down
Off up to 0 to 200
seconds
Here the stroke time for the actuator can be increased.
A set point change is not directly transferred to the positioner;
instead, the speed is reduced accordingly.
SP Charact. Curve
Linear
1:25 AM
1:50 AM
25:1
50:1
Custom
Use this parameter to select a function that adjusts the behavior
of the positioner to the Analogue input signal in accordance with
a predefined course. This linearizes the characteristic curves for
the valves and fittings and improves the behavior of the overall
control loop.
In addition to five predefined characteristic curves, you can also
select a user-configurable characteristic curve, which can only be
generated and saved in the device via a PC with the appropriate
configuration program (and not locally).
SP Direction
Direct
Reverse
The action describes the relationship between the Analogue set
point and pneumatic output 1.
-
Direct: Rising, set point 0 to 100 % -> output 0 to 100 %
-
Reverse: Falling, set point 0 to 100 % -> output 100 to 0 %