250 Application Examples
WAGO-I/O-SYSTEM 750 XTR
750-352/040-000 FC ETHERNET G3 XTR
Manual
Version 1.3.0
SCADA software has to provide a Modbus
device driver and support
Modbus
TCP functions!
When choosing suitable SCADA software, ensure that it provides a Modbus
device driver and supports the Modbus
TCP functions in the coupler.
Visualization programs with Modbus
device drivers are available from i.e.
Wonderware, National Instruments, Think&Do or KEPware Inc., some of which
are available on the Internet as demo versions.
The operation of these programs is very specific.
However, a few essential steps are described to illustrate the way an application
can be developed using a WAGO ETHERNET fieldbus node and SCADA
software in principle:
1.
Load the Modbus
ETHERNET driver and select Modbus
ETHERNET
2.
Enter the IP address for addressing the fieldbus node
At this point, some programs allow the user to give the node an alias name, i.e.
to call the node “Measuring data”. The node can then be addressed with this
name.
3.
Create a graphic object, such as a switch (digital) or a potentiometer
(analog)
This object is displayed on the work area.
4.
Link the object to the desired data point on the node by entering the
following data:
• Node address (IP address or alias name)
• The desired Modbus
function codes (register/bit read/write)
• The Modbus
address of the selected channel
Entry is program specific.
Depending on the user software the Modbus
addressing of a bus module can be
represented with up to 5 digits.
