Samson FOUNDATION 3730-5, Монтаж и эксплуатация

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66 EB 8384-5 EN
Start-up and settings
the signal pressure required by the control
valve. The type and extent of auto tuning de-
pends on the initialization mode selected:
−
Maximum range (MAX) (standard range)
Initialization mode for simple start-up of
valves with two clearly defined mechani-
cal end positions, e.g. three-way valves
(see section 7.6.1)
− Nominal range (NOM)
Initialization mode for all globe valves
(see section 7.6.2)
− Manually selected range (MAN)
Initialization mode for globe valves with
an unknown nominal range (see sec-
tion 7.6.3)
−
Substitute calibration (SUb)
This mode allows a positioner to be re-
placed while the plant is running, with the
least amount of disruption to the plant (see
section 7.6.4).
Note:
For normal operation, simply start
initialization by pressing the INIT key
after mounting the positioner on the
valve and defining the fail-safe posi -
tion and setting the volume restric-
tion. The positioner only needs to
work with its default settings. If nec-
essary, perform a reset (see sec-
tion 7.8).
Alternating readings
Initialization in progress
Icon depending on initializa-
tion mode selected
Bar graph display indicating
the progress of the initializa-
tion
%
Initialization successfully com-
pleted. Positioner in automatic
mode ( )
The time required for the initialization proce-
dure depends on the actuator transit time and
can take a few minutes.
After a successful initialization, the positioner
runs in closed-loop operation indicated by
the closed-loop operation icon.
A malfunctioning leads to the process being
canceled. The initialization error appears on
the display according to how it has been
classified by the condensed state. Refer to
section 8.3.
Note:
When Code 48 - h0 = YES, the diag -
nostics automatically start to plot the
reference graphs (drive signal steady-
state d1 and hysteresis d2) after ini-
tialization has been completed. This is
indicated by
tESt and d1 or d2 ap-
pearing on the display in alternating
sequence.
An error during the plotting of the ref-
erence graphs is indicated on the dis-
play over
Code 48 - h1 and Code
81 .
The reference graphs do not have any
effect on closed-loop operation.
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