Blockage; Travel - Samson 3374 Mounting And Operating Instructions

Configuration level

13.10 Blockage

Detect blockage (c51)
The actuator detects a valve blockage by comparing the travel after the torque-dependent
switch has been triggered with the travel measured on initialization. If the comparison shows
that the limit switch was triggered too early, this indicates that there is a valve blockage. A
blockage is indicated on the display by .
Remove blockage (c52)
When the remove blockage function is active, the actuator stem extends and retracts 1 mm at
the adjusted stroking speed three times in sequence.
Blocking protection (c53)
The blocking protection prevents the valve from seizing up. If the actuator stem is in the
closed position (0 %), it is extended slightly and then moved back to the closed position 24
hours after it last moved.
Code Description
c51 Blockage detection
c52 Blockage removal
c53 Blocking protection

13.11 Travel

Limited travel range (c63)
The Limited travel range parameter determines in % how far the actuator stem can move at
the maximum. The rated travel (c61) acts as the reference. When c63 = 100.0 %, the travel
range is not limited.
Code Description
c61 Rated travel
c63 Limited travel range
46
WE Adjustment range
NO NO (function not activated),
YES (function activated)
NO NO (function not activated),
YES (function activated)
NO NO (function not activated),
YES (function activated)
WE Adjustment range
[mm] – Read only –
100.0 % 10.0 to 100.0 %
EB 8331-4 EN