Node-Red OPC UA Client :- Read an Integer data from Siemens S7-1500 PLC using OPC UA

I was trying to create a setup with Siemens S7-1500 PLC as OPC UA Server and Node-Red as OPC UA Client.
Created the Flow and deployed.
Observed that there was no error and OPC-UA Client status was active reading.
But the payload was returning as 'Undefined'.

Can you support in troubleshooting