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6 Operating the Application
6.2
Scenario 1: Testing the wire electrode for level
monitoring
In the present cooling water system a pump is blocked as soon as a low fill level in
the tank is detected.
To check for a sufficient fill level of the tank or a dry run, the following steps have to
be carried out:
Table 6-2
No.
1.
For the level monitoring, dip the probe so deep into
the water that all the electrodes are in contact with
the water.
You can use a water glass for the tank.
•
2.
The relay output of the SIRIUS monitoring relay
switches.
•
The LED for the relay output of the SIRIUS
monitoring relay lights up.
•
The connected LOGO! logic module switches
the relay output for the release of the
SINAMICS V20 and
•
starts the operating hours counter at the same
time.
3.
Test the dry run by pulling the level monitoring probe
out of the water so far that only the electrode (M)
touches the water.
•
4.
The SIRIUS monitoring relay deactivates the
relay output.
•
The LED for the relay output of the SIRIUS
monitoring relay goes out.
•
The connected LOGO! logic module deactivates
the output for the release of the SINAMICS
V20.
•
The operating hours counter is stopped.
•
The pressure in the system decreases when
consumers are active.
5.
On the display of the LOGO! logic module and on
the LOGO! TD, the message "Water supply
interrupted" is displayed.
Set23_RegSim
Entry ID: 23753479,
V2.3.S,
Action
02/2014
Comments
Max
Min
M
Fill level OK!
Max
Min
M
dry run!
s
Water supply
interrupted
ESC
OK
LOGO! 12/24RCE
25
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