GESTRA NRS 1-41, Original Installation Instructions

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The sources of malfunctions occurring in CAN bus systems operating with several busbased stations
must be analysed systematically since faulty components or incorrect settings can give rise to nega tive
interactions with intact bus devices in the CAN bus system. These unwanted interactions can cause
error messages in fully functional bus devices, which will make fault detection even more difficult.
We recommend the following systematic fault finding procedure:
Systematic fault finding procedure for system malfunctions
System Malfunctions
– continued –
Step 1 (Start)
Detach terminal strips
in all Bus sensors.
Level electrode
Conductivity electrode
Pressure sensor
Temperature sensor
etc.
Step 3
Apply mains voltage
to bus devices
of the system,
e. g. NRS...
and
NRG...
Step 2
Plug in terminal strip
of the sensor
of the system,
e. g. NRS...
and
NRG... (electrodes) .
System O.K.
Detach terminal strips
between bus devices
of the system,
e. g. NRS...
and
NRG...
System Fault
Use faultfinding
list to identify the
malfunction.
Cut off power supply
to the equipment!
Check
Use faultfinding
list to identify the
fault(s)!
Final test:
have all faults
been eliminated?
Check next system
Danger
The terminal strips of the equipment are live during operation.
This presents risk of severe cases of electric shock!
Cut off power supply to the equipment before mounting or removing the terminal strips or
the housing cover!