Siemens sitrans LU01 Instrukcja Obsługi Strona 97

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7ML19985BE02 SITRANS LU01 – INSTRUCTION MANUAL Page 91
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Technical Reference
Parameter Settings for Point # 1
With process control equipment disabled, enter the RUN mode to monitor system
performance and alarm programming. Otherwise, perform a Reading Measurement
simulation (P920).
When satisfied with system performance and programming:
connect a high alarm indicator to Relay #1 (see P100 = 4).
connect a low alarm indicator to Relay #2.
connect a high high alarm indicator and filling equipment stop/start control to
Relay #3.
connect a low low alarm indicator to Relay # 4.
(Note that relays are de-energized in power off and alarm conditions).
For cement applications (or any very dusty dry solids), measurement difficulties during
vessel filling are common. For this example (assume the maximum filling rate), failsafe
operates as follows:
e.g.
Number Description Instructions
P001 Operation Enter "1" for
level
.
P002 Material Enter "2" for
solid
.
P003 Measurement Response Enter "1" for
slow
(0.1 m/min).
P004 Transducer Enter "107" for
XLT-30
.
P005 Units No entry required, (preset for
metres
).
P006 Empty
Enter "30" for transducer face to Empty equals
30.00
metres
.
P007 Span No entry required, (preset to
29.01 metres
).
P070 Failsafe Timer
Enter "2" for failsafe activation after
2 minutes
without
a valid echo.
P071 Failsafe Material Level Enter "HI" for
advance to Span on "LOE"
.
P072 Failsafe Advance No entry required. (preset to
restricted
).
P100 Relay Set Up
Enter "4" for
High, Low, High High, and Low Low
alarm
relays.
P101
High
Alarm Enter "25" for
High
Alarm at
25.00 m
.
P102
Low
Alarm Enter "10" for
Low
Alarm at
10.00 m
.
P103
High
High
Alarm Enter "27" for
High
High
Alarm at
27.00 m
.
P104
Low
Low
Alarm Enter "5" for
Low
Low
Alarm at
5.000 m
.
09:15 am Echo lost at 6.00 m, low alarm is still on, failsafe coundown begins
09:17 am Failsafe activated, actual level = 6.16 m, reported level = 6.00 m.
09:57 am Low alarm off, actual level = 9.36 m, reported level = 10.00 m.
12:27 am High alarm on, actual level = 21.36 m, reported level = 25.00 m.
12:47 am Infeed stopped, actual level = 22.96 m, reported level = 27.00 m.
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