Siemens Simatic S7-400

Assignment in the Data Area
The SEND_440 FB works with an instance DB (I_SEND_440). The DB number is speci󹪝ed in the
call. The data in the instance DB cannot be accessed.
Note
Exception: If the error (STATUS == W#16#1E0F) occurs, you can consult the SFCERR variable for
additional details (see the chapter "Diagnostics Messages of the Function Blocks (Page 97)").
This error variable can only be loaded via a symbolic access to the instance DB.
Parameters of the SEND_440 FB
The following table lists the parameters of the SEND_440 FB.
Table 6-2 Parameters of the SEND_440 FB
Name Type Data Type Description Permitted Values
Comment
REQ INPUT BOOL Initiates request with positive edge
R INPUT BOOL Aborts request Current request is aborted. Sending is
blocked.
LADDR INPUT INT Basic address of CP 440 The basic address is taken from STEP 7.
DB_NO INPUT INT Data block number Send DB No.: CPU-speci󹪝c,
zero is not allowed
DBB_NO INPUT INT Data byte number 0 ≤ DBB_NO ≤ 8190 Transmitted data as of
data byte;
O󹪜set is CPU-speci󹪝c
LEN INPUT INT Data length 1 ≤ LEN ≤ 400 (see chapter "Overview of the
Function Blocks (Page 73)"),
speci󹪝ed in number of bytes
DONE
1
OUTPUT BOOL Request completed without errors Parameters
STATUS == 16#00;
ERROR
1
OUTPUT BOOL Request completed with errors STATUS parameter contains error details
STATUS
1
OUTPUT WORD Error speci󹪝cation If ERROR == 1, STATUS parameter contains
error details
1
The parameter is available until the next call of the FB!
Communication via Function Blocks
6.3 Using the Function Blocks
Point-to-point connection CP 440 Installation and Parameter Assignment
78 Equipment Manual, 03/2022, A5E00057742-AE