6
Status and diagnostic
alarms
The Type 3730-4 Positioner contains inte-
grated diagnostics to generate classified sta-
tus and diagnostic alarms.
There are two different types of on-board di-
agnostics available: the standard integrated
diagnostics (EXPERT) and the optional ex-
tended EXPERT
+
diagnostics.
The generated alarms can be classified and
summarized according to the PROFIBUS
Profile 3.01 and the extension “Condensed
status and diagnostic messages” (refer to
section 14.5 on page 104).
6.1
Standard EXPERT
diagnostics
The standard EXPERT diagnostics provides
information about positioner states such as
operating hours counter, process monitor-
ing, number of zero calibrations and
initializations, total valve travel, tempera-
ture, initialization diagnostics, zero/control
loop errors, logging of the last 30 alarms,
etc. In addition, the standard EXPERT diag-
nostics generates diagnostic and status
alarms which allow faults to be pinpointed
quickly when a fault occurs.
In addition to the alarms being displayed on
the positioner display, the classified alarms
are also available over PROFIBUS-DP. Sta-
tus alarms are classified as follows:
4
Status
4
Operation
4
Hardware
4
Initialization
4
Data memory
4
Temperature
6.2
Extended EXPERT
+
diagnostics
In addition to the standard EXPERT diagnos-
tic features, the optional EXPERT
+
extended
diagnostics provides the following in-service
monitoring and out-of-service tests which
enable significant statements on the condi-
tion of the entire control valve.
In-service monitoring (statistical informati-
on)
4
Data logger
4
Histograms
4
Cycle counter
4
Valve end position trend
4
y = f (x) diagram (drive signal)
4
Hysteresis test
Out-of-service tests (tests)
4
y = f (x) diagram over the full range of
the valve
4
Hysteresis test over the full range of the
valve
4
Static characteristic
4
Step response test
The diagnostic tests are completely inte-
grated in the positioner. The PROFIBUS-DP
allows parameters to be entered and test re-
sults to be read. The graph readings depend
on the process control system used.
Further status alarms are generated from the
extensive information gained in the diagnos-
tic tests of EXPERT
+
which provide the user
with information covering the whole control
valve.
74
EB 8384-4 EN
Status and diagnostic alarms
Summary of Contents for 3730-4
Page 2: ...2 EB 8384 4 EN...
Page 127: ......
Page 188: ...188 EB 8384 4 EN...
Page 189: ...EB 8384 4 EN 189...
Page 190: ...190 EB 8384 4 EN...
Page 191: ...EB 8384 4 EN 191...
Page 192: ...192 EB 8384 4 EN...
Page 193: ...EB 8384 4 EN 193...
Page 194: ...194 EB 8384 4 EN...
Page 195: ...EB 8384 4 EN 195...
Page 196: ...196 EB 8384 4 EN...
Page 197: ...EB 8384 4 EN 197...
Page 198: ...198 EB 8384 4 EN...
Page 199: ...EB 8384 4 EN 199...
Page 206: ...206 EB 8384 4 EN...
Page 207: ...EB 8384 4 EN 207...
Page 208: ...208 EB 8384 4 EN...
Page 209: ...EB 8384 4 EN 209...
Page 210: ...210 EB 8384 4 EN...
Page 211: ...EB 8384 4 EN 211...