Operating instructions

3.4 Type of application
There are two different types of application:
Control valve and On/off valve. The auto
-
matic mode (AUTO) and manual mode
(MAN) can be selected in both types of
applications.
Operating
mode
Control valve On/off valve
Automatic The positioner
follows the refer
-
ence variable (w)
continuously.
Discrete analysis
of the reference
variable (w).
Reading
on dis-
play
Valve position x
in %
Valve position x
in % and
O/C
(Open/Close) in
alternating se-
quence
Manual The positioner follows the manual
set point given over local operation.
The application type is set in Code 49 - h
(see section 7.8).
Note:
–
Depending on the application type, cer
-
tain diagnostic functions cannot be per
-
formed or analyzed. See Table 1.
–
Section 7.8 contains details on discrete
analysis of on/off valves.
–
In manual mode, an on/off valve can be
moved past 100 % of the nominal range
(with the closed position for ATO) or be
-
low 0 % of the nominal range (with the
closed position for ATC). See section 7.1
for valve closed position.
3.5 Communication
The positioner is equipped with an interface
for HART
®
protocol (Highway Addressable
Remote Transducer) for communication pur
-
poses. Data are transmitted in a superim
-
posed frequency (FSK = Frequency Shift
Keying) on the existing signal loop for the 4
to 20 mA reference variable.
Either a HART
®
capable handheld commu
-
nicator or a computer with FSK modem can
be used to establish communication and op
-
erate the positioner.
3.5.1 Configuration using
TROVIS-VIEW 4
The positioner can be configured using the
TROVIS-VIEW 4 software for configuration
and operation. The positioner is equipped
for this purpose with an additional digital
SERIAL INTERFACE to allow a computer to
be connected over an adapter cable from
the RS-232 or USB port of the computer to
the positioner.
The TROVIS-VIEW 4 software enables the
user to easily set parameters in the
positioner and view process parameters on
-
line.
Note: TROVIS-VIEW 4 is a free software
which can be downloaded from the
SAMSON website (www.samson.de >
Services > Support & Downloads).
12 EB 8384-6 EN
Design and principle of operation