Vega VEGAMET 391 Operating Instructions Manual page 26

6 Setup with the integrated display and adjustment unit
Meas. loop - Outputs -
Current output
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Additional modes such as "Switching window", "Flow" and "Tenden-
cy" can be only adjusted via PACTware and DTM.
Relay 6 can be also configured as fail safe relay. The following exam-
ple shows the adjustment of an overfill protection. Further information
to pump control, tendency recognition or flow measurement are avail-
able in chapter "Application examples".
Select the requested mode and save with [OK]. By pushing [->], you
reach the next menu item.
. Now enter the reference value to which the relay switching points
relate. By pushing [->], you reach the next menu item.
. Now enter the switching points for switching the relay on and off.
In the following window the reaction of the relay in case of failure can
be determined. Here you can define whether, in case of failure, the
switching condition of the relay remains unchanged or the relay is
switched off.
The current output is used to transfer the measured value to a higher
ranking system, for example to a PLC, a control system or a meas-
ured value indication. This is an active output, i.e. a current is provided
actively. The processing unit must hence have a passive current input.
The characteristics of the current output can be set to 0 ... 20 mA,
4 ... 20 mA or inverted. The reaction in case of failure can also be
adapted to the requirements. The measured variable you refer to can
also be selected.
→
Carry out your settings via the appropriate keys and save with
[OK].
VEGAMET 391 • 4 ... 20 mA/HART