Endress+Hauser prolevel FMC 661, Руководство по эксплуатации

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4.3 Analogue Outputs
This section describes the setting of the analogue outputs. The following parameters can
be entered or changed:
•
Analogue signal range
•
Output damping
•
Value for 0/4 mA and 20 mA
•
Output at fault
Analogue signal range Two settings are possible:
•
0 = 0...20 mA (default)
•
1 = 4...20 mA
Depending on the level values entered at
V0H5 and V0H6 for the start and end of the
range, it is possible that signals below
4 mA and above 20 mA can be generated
in normal operation.
V0H3 Range Current limits
0
0...20 mA
-2
…
22 mA
1
4...20 mA
-2
…
22 mA
Example:
4
…
20 mA
# Matrix Entry Remarks
1 V0H3 1 4
…
20 mA
2 - »E« Register entry
Output damping This parameter sets the degree of damping
of the analogue output: on a sudden
change in level, 63% of the new value is
attained in the set time (0...100 s).
Example:
Output damping
# Matrix Entry Remarks
1 V0H4 20 Damping 20 s
2 - »E« Register entry
The digital values at V0H0, V0H8 and V0H9
are also influenced by the output damping.
100% (V0H6) 0% (V0H5)
0
20
level %
BA142_36
analogue signal range
4
mA
V0H3 = 0
V0H3 = 1
Fig. 4.10:
Selection of analogue signal range, V0H3
0 < t < 100
BA142_37
Fig. 4.11:
Output damping, V0H4
Chapter 4: Level Measurement Prolevel FMC 661
30 Hauser