Siemens Simatic S7 Series System Manual page 393

Table 8- 12 Example: Configuring DP communications to an S7-200 SMART CPU
LAD/FBD
Network 1:
Network 2:
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
Description STL
Calculate the Output LDB= SMB224, 2
data pointer. If in data
MOVD &VB0, VD1000
exchange mode:
ITD SMW226, AC0
1. Output buffer is an
+D AC0, VD1000
offset from VB0.
2. Convert V memory
offset to double in-
teger.
3. Add to VB0 ad-
dress to get output
data pointer.
Calculate the Input LDB= SMB224, 2
data pointer. If in data
MOVD VD1000,
exchange mode:
VD1004
1. Copy the output
BTI SMB228, AC0
data pointer.
ITD AC0, AC0
2. Get the number of
+D AC0, VD1004
output bytes.
3. Add to output data
pointer to get start-
ing input data
pointer.
Communication
8.5 PROFIBUS
393