How to dynamically change the IP address of TM241 or TM251 controller using function block?

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There are different methods to change the IP address of the controller. One of them is using the function block 'ChangeIPAddress'

ChangeIPAddress function block can change the IP address of the controller dynamically along with its subnet mask and gateway. It also has the capability to save the IP address so that it is used in subsequent reboots of the controller. It can only work when IP mode is configured to fixed IP.

Below is the program for changeIPaddress.