Siemens S7200 communication with Wincc

[Amjad19376]

I am using S7 200 PLC in my system which is communicating with WIncc via EM277 module data in the wincc is not rententive as wincc is switch from offline to online.I can see data in plc but not on wincc i have enter data again. pl help me.
Amjad

 

[Amjad19376]

I am using S7 200 PLC in my system which is communicating with WIncc via EM277 module data in the wincc is not rententive as wincc is switch from offline to online.I can see data in plc but not on wincc i have enter data again.
is any one done this type communication? is any extra code is required to keep data rentative whenever wincc is online with the plc

pl help me.
Amjad