Once you open the ICP Programming Tool, you can click on the "Options" in the "Programming" section, as shown in Figure 1, to enable programming options.
In the programming options, check the "Offline Programming Mode" in the "Operation" section, as shown in Figure 2, to enable the offline programming function.
When you start programming, the loaded file is saved in Nu-Link or Nu-Link Pro's offline Flash. After that, you can do offline programming using the Nu-Link or Nu-Link Pro without connecting to the ICP Programming Tool. By pressing the upper left button on the Nu-Link, as shown in Figure 3, you can start programming.