Program conversion process
2.3 Compare the program blocks in the original program and the converted program
S7-1200 Device configuration
Retentive Memory
2.3
Compare the program blocks in the original program and the
converted program
The purpose of the comparison is to identify the subroutines, interrupt routines, and data
block data that were converted.
● Open the original program in STEP 7-Micro/WIN and open the converted program in
● Use the STEP 7-Micro/WIN Instruction tree and open the "Program Block" and "Data
● Use the STEP 7 Basic Project tree and open the "Project blocks" branch.
The subroutines, interrupt routines, and V memory data groups (data block tabs) created by
STEP 7-Micro/WIN wizards and library usage are protected and are not converted. Also
user-protected POUs or V memory tabs are not converted.
If S7-200 code blocks are not converted, then you must create substitute program logic in
the S7-1200 program. Unconverted code blocks and data block tabs (data groups) can
create undefined symbolic references in POU blocks that were successfully converted.
Undefined symbolic references must be resolved in the STEP 7 Basic program.
For information about specific program logic instructions, see S7-200 LAD instruction
conversion (Page 23).
For more information about how the program structure is converted, see Program structure
conversion (Page 15).
10
S7-1200 parameter
Internal flash
Retentive range setting
memory
STEP 7 Basic, at the same time. Compare the POU (Program Organizational Unit) block
structure of original S7-200 program with the converted STEP 7 Basic program.
Block" branches.
The Tag table can retain a
range of
M memory (2048 byte
maximum)
A DB editor can retain a
block of DB data. The 2048
byte total is shared between
M and DB memory.
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
S7-200 parameter
System block setting
Six ranges in V, T and C
actual values, or M
Manual, 1/2010
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