Hello @Jayaprakash Rajasekaran ,
from the conversation above, it seems you are using Ewon devices.
Like many other industrial hardware manufacturers, some manufacturer-specific connectivity solutions will be available. It will probably support both monitoring and device management on a high level. Most of these custom solutions come with a separate subscription model.
Do you want to have your data being send to Azure and made available in SqlAzure?
Depending on the abilities of a subscription-based solution, this could be possible (read: provided). If not, contact a supplier and try to convince them to add this or a similar (export) ability.
If this is not possible, you need to build something yourself or have it done by a Microsoft partner capable of building IoT solutions.
Because there are security risks and management challenges involved in connecting a PLC directly to the cloud, most likely an edge architecture is preferred. Check out the Azure IoT Edge documentation.
I connected several brands of PLCs to Azure, using multiple protocols. Some PLCs even connect to Azure directly (eg. using NodeRed).
Also, check out Microsoft IoT industrial offerings.