Changes apply immediately: only the device you change restarts its polling.
ID
Name
Transport
Address
Unit ID
Poll (ms)
Enabled
Online
Actions
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Add Device
RTU over TCP: devices with the same address and port share one connection (a serial device server); requests are sent one at a time.
All devices on one serial port share the bus and its line settings: changing baud rate, parity or stop bits here changes them for every device on this port.
0 = automatic (3.5 characters)
Add device from template
The points get consecutive IOAs from the first IOA. Check addresses, data types and scaling against your device's manual.