Siemens Simatic S7-400

Example of "Direct Parameter assignment"
Call of the FB 10 corresponding to "direct parameter assignment":
STL
Network 1:
CALL
FB 10, DB10
REQ := M 0.6 //Activates SEND
R := M 5.0 //Activates RESET
LADDR := +336 //Basic address, PB336
DB_NO := +11 //Data block DB11
DBB_NO := +0 //As of data word DBB 0
LEN := +15 //Length 15 bytes
DONE := M 26.0 //Terminated without error
ERROR := M 26.1 //Terminated with error
STATUS := MW 27 //Status word
Example of "Indirect Parameter assignment"
Call of the FB 10 corresponding to indirect parameter assignment:
STL
Network 1:
CALL
FB 10, DB10
REQ := M 0.6 //Activates SEND
R := M 5.0 //Activates RESET
LADDR := MW21 //Basic address in MW21
DB_NO := MW40 //DB no. in MW40
DBB_NO := MW42 //DBB No. in MW42
LEN := MW44 //Length in MW44
DONE := M 26.0 //Terminated without error
ERROR := M 26.1 //Terminated with error
STATUS := MW 27 //Status word
Parameter assignment of Data Words
The speci󹪝cation of data words (partially quali󹪝ed speci󹪝cation) is not allowed because
(depending on the actual operands) the currently selected data block can no longer be
determined in the standard function. If a data operand is speci󹪝ed as an actual parameter, the
fully quali󹪝ed speci󹪝cation must always be used.
A fully quali󹪝ed speci󹪝cation can be either absolute or symbolic. Mixed addressing with fully
quali󹪝ed data operands is rejected by the compiler.
Communication via Function Blocks
6.4 Programming the Function Blocks
Point-to-point connection CP 440 Installation and Parameter Assignment
86 Equipment Manual, 03/2022, A5E00057742-AE