Siemens SIMATIC S5 Manual page 271

Test Program
Digital outputs:
(*) Free with the S5-115U and S5-135U
Parameter assignment error in the warm restart (OB 21, OB 22) with the S5-155U.
If, in the S5-155U, a parameter assignment error (Q 7.1 =1) occurs during warm restart, the
associated parameter assignment error number then stands in the flag byte FY 100.
With the programmable controller S5-135U the output parameters of the FB 162 are not written
to the outputs but only to the flags during the warm restart program. The exception is the
parameter PAFE.
Data area occupied:
The data blocks DB 150, DB 151 and DB 152 are occupied from data word DW 0 to DW 32.
These data blocks are used to save the scratchpad flag area and the free system data area in
the interrupt OBs.
With the S5-155U, this is performed in data block DB 255 which must be set up with a length of
820 words.
IP244
6–6
C79000–B8576–C862–02