1. Enter C:\ProgramData\Unitronics\UniLogic\Upgrade\IO_OS
2. Create folder with the IO model you want to upgrade, using the following list
   For example, for UIS-04PTN create a folder with the name: PT4
   0,DI8RO8, UID-0808R
   1,DI8TO8, UID-0808T
   2,AI4AO2, UIA-0402N
   3,DI16, UID-1600
   4,DRO16, UID-0016R
   5,DTO16, UID-0016T
   6,DI8TO8HS, UID-0808THS
   7,PT4, UIS-04PTN
   8,TC8, UIS-08TC
   9,DI16RO16, UID-W1616R
   10,DI16TO16, UID-W1616T
   11,AI8, UIA-0800N
   12,CB1, UIS-WCB1
   13,AO6, UIA-0006
   14,CB2, UIS-WCB2
   15,PTK4, UIS-04PTKN
   16,AI8H, UIA-0800NH
   17,CB6, UIS-WCB6
3. Put inside the folder the OS files (contact support for your specific required files).
4. Open UniLogic and choose:

5. Select the PLC address and the correct IO OS from the list and follow the instructions: