Samson 3730-6, Mounting And Operating Instructions

Page: 60 / 124

After the basic initialization, the reference
curve for the valve signature is recorded
(
Code 48 - h0
= YES).
Reading in alternating
sequence:
TEST/D1
Bar graph display
indicating the progress of
the initialization
Initialization successful,
positioner in automatic
operating mode
The time required for an initialization pro-
cess depends on the transit time of the actu-
ator and may take several minutes.
After a successful initialization, the
positioner runs in closed-loop operation in-
dicated by .
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. See sec-
tion 8.3.
Note: An error during the recording of the
valve signature is indicated by Code 81 . The
valve signature does not affect closed-loop
operation.
Valve closed position AIR TO CLOSE
If the slide switch is set to AIR TO CLOSE,
the positioner automatically switches to the
direction of action increasing/decreasing
(
äæ
) on successful completion of initializa-
tion.
This results in the following assignment be-
tween reference variable and valve closed
position:
Valve closed
position
Direction of
action
Reference variable w
Valve
CLOSED OPEN
AIR TO OPEN
ää
w = 0 % w = 100 %
AIR TO CLOSE
äæ
w = 100 % w = 0 %
The tight-closing function is activated.
NOTICE
Set Code 15 (final position w>) to 99 % for
three-way valves.
Canceling an initialization process
The initialization procedure can be canceled
while running by pressing the rotary
pushbutton ( ). STOP appears three sec-
onds long and the positioner then changes
to the fail-safe position (SAFE).
Exit the fail-safe position again over Code 0
(see section 8.2.2).
7.6.1 MAX – Initialization based
on maximum range
The positioner determines travel/angle of
rotation of the closing member from the
CLOSED position to the opposite side and
60
EB 8384-6 EN
Start-up – Settings
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