Level monitoring system
NT 4600
Technical information / Instruction manual
page
Sensor
Setting to "4-20 mA".
Input Signal
Modbus for this silo
:
It is possible to switch off single silos from the Modbus network (e.g. for revision) by setting the related Modbus ID inactive. If so, the
other silos stay active. Inside the related silo it will be stated "Offline".
Modbus ID:
Input of the Modbus ID (Modbus adress) of the Modbus converter.
The Modbus converters are factory presetted to address 1 for the first Modbus converter, then ascending to 2, 3, etc. The settings can
not be changed. A label with the Modbus address is present inside the Modbus converters on the implemented module M-7002.
4-20 mA Modul:
Setting of the Channel for 4-20 mA sensors and full detectors:
Channel 0 is allocated to the terminal Vin0+ and DI0 (see electrical installation on page 9)
Channel 1 is allocated to the terminal Vin1+ and DI1
Channel 2 is allocated to the terminal Vin2+ and DI2
Channel 3 is allocated to the terminal Vin3+ and DI3
Full detector
If a full detector is connected, it is read with setting to "Modbus" (see electrical installation page 9 for connection to Modbus converter).
If "value" is selected, the message for full detection is activated, if the entered value (in percent) is exceeded by the material level.
b) With use of 4-20 mA sensor (connected via Modbus converter)
Programming of the 4-20 mA sensor
:
The connected sensor must be set as follows:
- 4 mA must correspond to the level value 0% (see "Silo settings", page 16).
- 20 mA must correspond to the level value 100%.
Note to NR 3000: H and L are related to the fixing flange.
- The sensors needs to have a linear level signal (relation between the signal output and level in the silo). The volume-based calculation is
performed in the visualisation only.
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NT 4600
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