Max – Initialization Based On Maximum Range - Samson 3730-6 Mounting And Operating Instructions

Start-up – Settings
After the basic initialization, the reference
curve for the valve signature is recorded
(Code 48 - h0 = YES).
%
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.
60
EB 8384-6 EN
Reading in alternating
sequence:
TEST/D1
Bar graph display
indicating the progress of
the initialization
Initialization successful,
positioner in automatic
operating mode
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 Direction of
position action
AIR TO OPEN
ää
AIR TO CLOSE
äæ
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
Reference variable w
Valve
CLOSED OPEN
w = 0 % w = 100 %
w = 100 % w = 0 %