Indicate Blockage; Blocking Protection - Samson 5857 Mounting And Operating Instructions

Settings\Actuator\Blockage
Function
Blockage removal

16.4.3 Indicate blockage

The positioner indicates a blockage when the Indicate blockage function is active (only when
the 'Blockage detection' is activated).
− 12 V is issued at the output as position feedback signal.
Settings\Actuator\Blockage
Function
Indicate blockage

16.4.4 Blocking protection

The Blocking protection prevents the valve from seizing up. If the actuator stem is in the 0 %
position, it is extended slightly and then moved back to the closed position 24 hours after it
last moved.
Movement of the actuator stem caused by the activated blocking protection is indicated by
the yellow LED:
− Protecting against blockage
Settings\Actuator\Blockage
Function
Blocking protection
EB 5857 EN
Annex A (configuration instructions)
WE Adjustment range
No No, Yes
WE Adjustment range
No No, Yes
On
Off
WE
No
Time in s
Adjustment range
No, Yes
16-5