Samson 3730-3 ESD, Монтаж и эксплуатация

Страница: 14 / 24

14
EB 8388-1 EN
ESD functions
4
y cancellation: The drive signal fell below
the
y control value.
4
Tolerance band exceeded: The deviation
of the valve position exceeded the
ESD
tolerance band.
4
Max. test time exceeded: The test was
not completed within the specified period
of time.
Further error messages include:
4
Test manually cancelled: The test has
been manually cancelled.
4
Measured data storage out of memory:
The scan rate has been selected too low.
After 100 measured data per measured
variable have been recorded, the log-
ging stops. However, the test is contin-
ued.
4
Aborted by solenoid valve: The test was
cancelled by the solenoid valve being
triggered.
4
Supply pressure/friction: An insufficient
supply pressure or excessive friction oc-
curred during the test.
When a partial stroke test has been com-
pleted successfully, analyzed parameters
are displayed separately for the increasing
and the decreasing characteristic:
4
Overshoot (relative to step change, [%])
4
Dead time [s]
4
T63 [s]
4
T98 [s]
4
Rise time [s]
4
Settling time [s]
2.2.1 Condensed state/Fault alarm
output
The Fault alarm output parameter allows
you to define which type of alarm is issued
by the hardware fault alarm output (normal
error message and/or ESD status).
4
Normal error message :
EXPERT/EXPERT
+
condensed state (see
EB 8384-3 EN, Code 32 and 33)
4
ESD status : ESD function status
4
Normal error message and ESD status :
ESD function status plus EXPERT/
EXPERT
+ condensed state
If a set ESD status (partial stroke test not suc-
cessful) is to be included in the
condensed
state
, go to the [Positioner] folder under [Er-
ror control > Classification report > Ex-
tended > Emergency Shut Down] and assign
a classification. The following classifications
(also see section 6.3 in
EB 8384-3 EN
, and
section 4 in EB 8388 EN ) are available:
4
Maintenance alarm
4
Maintenance required
4
Maintenance demanded
4
No message [default]
When the default value “No message” is
set, the ESD status is not included in the con-
densed state.
Note!
The Fault alarm output parameter must be
set to “ESD status” or “Normal error mes-
sage and ESD status” to allow the ESD sta-
tus to be indicated at the fault alarm output.