i have zenon 6.51 build 4.
and wanna make redundancy server and PLC
plc are s7 tcp/ip(simence) .
anyway, i can make server redundancy but plc redundancy is problem.

on test,
when the primary PLC was power off or network cable was disconnected, PLC redundancy worked.
but, to test, when i made the p-PLC be stoped,
p-PLC took over to s-PLC. by the way, zenon was still communicate with p-PLC.
I am wondering how to take over the communication when making the PLC be stoped on purpose.