Symbol Table; Data Block - Siemens SIMATIC S7-200 Manual

Program structure conversion

3.3 Symbol table

3.3 Symbol table
STEP 7-Micro/WIN program symbols must be fully defined to be converted. This means that
both the symbol name and corresponding address must be valid.
STEP 7-Micro/WIN program symbols are converted as shown in the following tables.
Table 3- 6
S7-200 symbol
Symbol name
Symbol comment
I, Q, and M symbols
AIW and AQW (Analog I/O) symbols
HC (High-speed counter) symbols
T (Timer) symbols
C (Counter) symbols
V memory symbols
L memory symbols in a local variable table
Table 3- 7
S7-200 Symbol reference
SM (Special Memory) symbols
S (Sequence Control Relay) symbols
Wizard generated symbols
Library generated symbols
3.4

Data block

STEP 7-Micro/WIN data block data is converted to a single STEP 7 Basic global data block
DB1. The converted DB1 has the "Symbolic access only" attribute disabled, so you can use
both symbolic and absolute addressing. The STEP 7-Micro/WIN data block has tab sections
which selects a data group in the data block. All tabs that are unprotected will be converted
into a single STEP 7 Basic data block DB1. Data block tabs that are password protected as
"read only" will not be converted. If a data block tab was generated and protected by a STEP
7-Micro/WIN wizard, then you cannot remove the protection and the tab's data group is not
converted.
18
S7-200 symbolic references that are converted
S7-200 symbolic references that are not converted
S7-1200 symbol conversion result
Tag name
Tag comment
I, Q, and M tags
I and Q tags
I tags
S7-200 timer symbol names are converted to S7-
1200 timer DB names. S7-200 timer bit and current
value symbols are converted to the corresponding
data names, in the timer DB.
S7-200 counter symbol names are converted to S7-
1200 counter DB names. S7-200 counter bit and
current value symbols are converted to the
corresponding data names, in the counter DB.
Data block element name
L memory symbol in a block interface table
S7-1200 symbol conversion result
Undefined parameter name in program logic:
You must assign a new symbol name and address in
a S7-1200 tag group or data block.
The generated code blocks and associated tag
names are not converted.
You must make new program logic, tag names, and
memory address assignments.
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
Manual, 1/2010