CODESYS - the IEC 61131-3 automation software

Dear,

I'm new on this forum.
I search to ping a smartphone on wifi network with a Wago Modbus tcp 750-841.
I try to test the SOCK_PING function with Codesys v2.3 but it's not work.
This function give the result SOCK_SUCCESS all the time even if the ip address of the smartphone is not on the network.

I put 2 pictures in attachment.

Do you an idea for my problem ?

Thanks