Question:
Can data be collected from a SCADA application and sent to a master device via Modbus protocol?
Solution:
Yes, it can. To do so, you must add a slave Modbus driver to the SCADA application and create a PLC tag to each tag whose value you want to transfer to the master. On the supervisory’s tag’s OnValueChange event, create a script to attribute value to the PLC tag. On the master device, point it to the slave’s IP address.
Setting the application:
Please notice that the master application in the example for illustrative purposes only. Also notice that in this case we used Elipse SCADA, but it can be replaced by any other supervisory or master device implementing Modbus protocol.
Before executing the applications, follow these procedures:
- Locate the driver’s DLL (master and slave applications).
- On the master application, set the slave’s IP address on Ethernet tab at Driver Settings.
For further information on the drivers listed in this article, please refer to their corresponding User’s Manual.
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