Spirax Sarco SP8-10, Installation And Maintenance Instructions Manual

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IM-P707-01 CTLS Issue 1
55
SP8-10 Smart positioner
5.1.16 Menu easy setup
(continued)
Menu/parameter Value range Description
DB Approach Fast, Medium, Slow
This parameter specifies the speed at which the dead
band is approached. In rare cases, overshooting can
occur when the valve position is being compensated.
This can be prevented by reducing the speed of the
dead-band approach (DB approach).
Dead Band Calc. Active, inactive
Use this function to activate/deactivate the control
behavior on the dead band.
Autoadjust Mode
Full, Controller, Valve
Range, Zero, Locked
Use this parameter to define the mode or scope of the
Auto Adjust function.
-
Full: Complete automatic adjustment
-
Controller: Determine control parameters only
-
Zero: Determine the 0 % position only
-
Valve Range: Determine stops only
-
Locked: Automatic adjustment blocked
Note:
On valves where slip-stick effect is significant, valve
vibration can be reduced by increasing the value of the
‘Zone’ parameter.
Start Autoadjust Start
The following values are determined during Auto
Adjust:
-
Direction of action of the actuator
-
Direction of action of the reset spring
-
Actuator travel of the actuator/final control element
-
Stroke time for both directions
-
Control parameters
-
Offset for the I/P module
-
Static friction of the actuator/final control element
-
Dynamic friction of the actuator/final control
element