Kuka KR c4 compact safety

Hello
I'm asking for help how to solve problem with safety of the robot.
Normally robot is working in cell behind fence, inside cell there are some small machines which
must be rearmed ( tool change etc) in this case operator push button which send request to safety controller ( not robot safety but machine safety controller) to enter inside the cell. After gate open I can't move robot. What if I will need to change path of the robot?
On connector X11 i have connected only External E-stop pin 1,2 and 11,12.
Which pins on X11 connector should be wired to get option move robot in T1 mode during safety gate open?
Second question: Is it normal that after E-stop robot fall out from the program?
How to communicate robot with PLC via ethernet? How to set safety functions via ethernet?Which manual i should find?
Thank you