Siemens SIMATIC CP 440 Manual page 96

Communication Using Function Blocks
Assignment in the Data Area
The SEND_440 FB works with an instance DB (I_SEND_440). The DB number is
specified 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 more details of the error (see Section 8.3). This error
variable can only be loaded via 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
REQ INPUT
R INPUT
LADDR INPUT
DB_NO INPUT
DBB_NO INPUT
LEN INPUT
1
DONE OUTPUT
1
ERROR OUTPUT
1
STATUS OUTPUT
1
The parameter is available until the next call of the FB.
6-8
Data Type Comment
BOOL Initiates job at positive
edge
BOOL Aborts job
INT Basic address of the CP
440
INT Data block number
INT Data byte number
INT Data length
BOOL Job completed without
errors
BOOL Job completed with errors
WORD Error specification
Point-to-point connection CP 440 Installation and Parameter Assignment
Permitted Values,
Comment
Current job is aborted. Sending
is blocked.
The basic address is taken from
STEP 7.
Send DB no.:CPU-specific,
zero is not allowed
0 DBB_NO 8190
transmitted data as of data byte;
offset is CPU-specific
1 LEN 200, specified
in number of bytes
STATUS parameter == 16#00;
STATUS parameter contains
error information
If ERROR == 1, STATUS
parameter contains error
information
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