Samson 3730-6, Mounting And Operating Instructions

Page: 69 / 124

Turn ®
ZP
4
Press INIT key!
Zero calibration is started, the positioner
moves the control valve to the CLOSED
position and readjusts the internal electri-
cal zero point.
7.8 Settings for on/off valves
If the valve is to be operated using the
on/off valve as the type of application, the
operating point, test limits and limits for the
discrete analysis must be defined.
Note: The travel range of on/off valves is
defined using the fail-safe position and the
given Operating point . As a result, the fol-
lowing parameters to define the operating
range and the range of the reference vari-
able (set point) cannot be changed or ana-
lyzed:
Lower travel/angle range value (
Code 8
)
Upper travel/angle range value (
Code 9
)
Lower travel/angle limit ( Code 10 )
Upper travel/angle limit ( Code 11 )
Set point, lower range value ( Code 12 )
Set point, upper range value ( Code 13 )
Discrete analysis
If the reference variable (w ) is below
Operating point limit
(
Code 49 - h5
) at the
start of automatic operation, the valve
( ) moves to the fail-safe position. If
the reference variable increases and ex-
ceeds the Operating point limit, the valve
moves to the Operating point ( Code 49 -
h1 ). The valve moves back to the fail-safe
position if the reference variable continues
and falls below the
Fail-safe action limit
(
Code 49 - h2
).
If the reference variable (w ) is above
the
Operating point limit
(
Code 49 - h5
)
when automatic mode starts, the valve
( ) moves to the
Operating point
(
Code 49 - h1
). The valve moves back to the
fail-safe position if the reference variable
continues and falls below the Fail-safe ac-
tion limit ( Code 49 - h2 ).
EB 8384-6 EN
69
Start-up – Settings
 t < 6 s Time [s]
Travel [%]
20
40
60
80
100
Code 49 - h1
Code 49 - h5
Code 49 - h2
 t < 6 s
20
40
60
80
100
Time [s]
Travel [%]
Code 49 - h1
Code 49 - h5
Code 49 - h2