s7-power off problem

Hello
I make a program for s7-cpu315.
When power off. all data are go zero.(0) I use some count.
like that
A I 12.0
CU "C17"
BLD 101
A M 113.0
L C#5
S "C17"
A "m114.0"
R "C17"
L "C17"
T DB12.DBW 0
NOP 0
NOP 0
Which kind of change i make?
Many thanks for helps

Necyil

Go to HardWare-configuration, select the properties of the cpu and choose the tab 'retentivity'. There you can make counters, timers, flags and DB's retentive you they will keep there value after power down.