Siemens SIMATIC CP 440, Руководство пользователя

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Communication Using Function Blocks
6-8
Point-to-point connection CP 440 Installation and Parameter Assignment
A5E00057742-02
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 Data Type Comment Permitted Values,
Comment
REQ INPUT BOOL Initiates job at positive
edge
R INPUT BOOL Aborts job Current job is aborted. Sending
is blocked.
LADDR INPUT INT Basic address of the CP
440 The basic address is taken from
STEP 7.
DB_NO INPUT INT Data block number Send DB no.:CPU-specific,
zero is not allowed
DBB_NO INPUT INT Data byte number 0 DBB_NO 8190
transmitted data as of data byte;
offset is CPU-specific
LEN INPUT INT Data length 1 LEN 200, specified
in number of bytes
DONE
1
OUTPUT BOOL Job completed without
errors STATUS parameter == 16#00;
ERROR
1
OUTPUT BOOL Job completed with errors STATUS parameter contains
error information
STATUS
1
OUTPUT WORD Error specification If ERROR == 1, STATUS
parameter contains error
information
1
The parameter is available until the next call of the FB.