Samson TROVIS 3731-3, Mounting And Operating Instructions

Page: 62 / 100

8.2.2 Fail-safe position (SAFE)
If you want to move the valve to fail-safe po-
sition determined during start-up (see sec-
tion 7.4), proceed as follows:
Turn
→
Code 0
Press , display: current operating mode
( AUtO or MAN ), Code 0 blinks.
Turn
→
SAFE
Press , display: S
The valve moves to the fail-safe position.
If the positioner is initialized, the current
valve position is indicated on the display in
%.
Exit the fail-safe position
Turn
→
Code
0
Press , Code 0 blinks.
Turn and select the required operating
mode AUtO or MAN .
Press
The positioner switches to the operating
mode selected.
8.3 Malfunction/maintenance
alarm
All status and fault alarms are assigned to a
classified status in the positioner. The default
settings of the status classification are listed
in the code list.
Note: The status classification can be
changed in TROVIS-VIEW and over the pa-
rameters in the DD file. Refer to EB 8389 on
EXPERTplus valve diagnostics.
To provide a better overview, the classified
messages are summarized in a condensed
state. The following status messages are
available:
4
Maintenance alarm
The positioner cannot perform its control
task due to a functional fault in the de-
vice or in one of its peripherals or an ini-
tialization has not yet been successfully
completed.
4
Maintenance required
The positioner still performs its control
task (with restrictions). A maintenance
requirement or above average wear has
been determined. The wear tolerance will
soon be exhausted or is reducing at a
faster rate than expected. Maintenance
is necessary in the medium term.
4
Maintenance demanded
The positioner still performs its control
task (with restrictions). A maintenance
demand or above average wear has
been determined. The wear tolerance will
soon be exhausted or is reducing at a
faster rate than expected. Maintenance
is necessary in the short term.
62
EB 8387-3 EN
Operation