Samson 3374 Series - Blockage; Travel

16-10 EB 8331-4 EN
Annex A (conguration instructions)
16.10 Blockage
Blockage detection (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 the
icon.
Blockage removal (c52)
WhentheBlockageremovalfunctionisactive,theactuatorstemextendsandretracts1mm
three times at the most 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 Default Adjustment range
c51 Blockagedetection NO NO (function inactive)
YES (function active)
c52 Blockageremoval NO NO (function inactive)
YES (function active)
c53 Blockingprotection NO NO (function inactive)
YES (function active)
16.11 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 Default Adjustment range
c61 Rated travel mm
u Read only
c63 Limited travel range 100.0% 10.0to100.0%