Master off all light with 1 pushbutton

Dear colleagues,

I am using LOGO8 to control lighting with on/off light by each push button. My situation is below:

PushButton I1 use to on/off Q1

PushButton I2 use to on/off Q2

....

PushButton I12 use to on/off Q12

But i would like to have PushButton I13 to master off all lights when i leave my house and that PushButton does not have function master on all light. After master off all lights, if i like to make on any light, just need to push the button which is dedicated for that light as above discribe.

Some M flags i use for connecting to KNX system.

Can anyone help me to create the master off all light pushbutton ?

The attached image is my programme for 4 first output for your reference.

Thank you so much for your suppoort

ixo65

See attachment

 Hi,

It works well.

Thank you so much