Samson 3730 Series Mounting And Operating Instructions page 64

Start-up – Settings
If the reference variable (
Limit operating point (Code 49 - h5) at the
start of automatic operation, the valve
( ) moves to the Operating point
( Code 49 - h1). If the reference variable
then drops below the Limit fail-safe position
( Code 49 - h2), the valve moves to the
fail-safe position.
Starting the partial stroke test (PST)
A partial stroke test is started when the ref-
erence variable (
fined position (fail-safe position or Oper-
ating point ) into the range between Lower
limit test start (Code 49 - h3) and Upper
Travel [%]
100
80
60
40
20
Δt > 6 s
Start PST
Travel [%] Start PST
100
80
60
40
20
Δt > 6 s
64
EB 8384-3 EN
) is above
) moves from a de-
Code 49 - h1
Code 49 - h5
Code 49 - h4
Code 49 - h3
Code 49 - h2
Code 49 - d2
Time [s]
End PST
Code 49 - h1 =
End PST
Code 49 - d2
Code 49 - h5
Code 49 - h4
Code 49 - h3
Code 49 - h2
Time [s]
limit test start (Code 49 - h4) and remains
there for longer than six seconds. The valve
( ) moves from the last defined posi-
tion to Step start (Code 49 - d2).
After the partial stroke test is completed, the
valve moves back to its last position
(fail-safe position or Operating point ).
Note: The partial stroke test (PST) is per-
formed according to the settings in Code 49
- d2 to 49 - d9. Refer to EB 8389 EN on
+
EXPERT valve diagnostics.
Cancelation of the partial stroke test (PST)
The partial stroke test is canceled whenever
the reference variable leaves the range be-
tween Limit fail-safe position and Limit oper-
ating point .
After the test has been canceled, the valve
moves back to its last position (fail-safe posi-
tion or Operating point ).
Performing settings
Configuration at the positioner must be en-
abled before the application type
(open/close valve) can be set:
→ Code 3, display: No
Turn
Press , Code 3 blinks.
→ YES
Turn
Press , display:
Select open/close valve:
→ Code 49
Turn
Press , Code 49 blinks.
→ Code h0
Turn