Siemens US2:9810RC - ION Sessions; Modbus

The following table describes the override values you can use and the resulting connection
process:
Example override value Connection process
10.168.68.245/7443
Explicitly connects to port 7443. If the registry dictates that ION
over TLS = 7443, this will be a TLS connection.
10.168.68.245/TLS
Explicitly uses the registry to connect to what is specified as the
ION over TLS port. By default: 7443.
10.168.68.245/TLS:7443
Explicitly uses a TLS connection to the specified port. In this
example, 7443.
For example:
ION sessions
An ION session uses a session token ID to authenticate IONrequests to a device. The first
IONrequest sends the user credentials to the device. Upon successful validation, the device
creates a unique, non-transferable ION session token ID. Subsequent ION requests are validated
using the ION session token ID, not the user credentials.
An ION session token ID has a fixed inactivity session timeout of 5 minutes.
There is no configuration required to enable ION sessions.
NOTE: Both the IONover TCPand ION over TLS (Secure ION) include ION session
authentication.
Modbus
Modbus is a client-server communications protocol where the client initiates transactions and the
server or servers respond with the requested information or action.
9810 series - User manual Communications
7EN05-0390-08 96