Hi Guys!

I have a cooling fan which is controlled by the temperature sensor input.

I would like to control the fan in a way that, in a normal situation it rotates automatically depending on the input.

In addition, I like to implement a manual switch/push button (it could be from HMI) to control the output manually.

When the state goes to manual, it keeps the current state of the output and possible to turn it on/off. When its in the manual mode, the sensor input should not be impact on the output at all. and when it goes back to automatic mode, it swap the state of the output as it should be in the automatic  mode.

Is there any useful thread or instruction in TIA portal, I can use?

I am using TIA Poratl V13 SP1 Up7, KTP400 Basic and S7-1214C DC/DC/DC.

Any feedback will be highly appreciated.