Siemens SIMATIC CP 440, Руководство пользователя

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Communication Using Function Blocks
6-12
Point-to-point connection CP 440 Installation and Parameter Assignment
A5E00057742-02
Parameters of the RECV_440 FB
The following table lists the parameters of the RECV_440 FB.
Table 6-3 Parameters of the RECV_440 FB
Name Type Data Type Comment Permitted Values,
Comment
EN_R INPUT BOOL Enables reading of data
R INPUT BOOL Aborts job Current job is aborted. Receiving
is disabled.
LADDR INPUT INT Basic address of CP 440 The basic address can be found
in the configuration table in
STEP 7.
DB_NO INPUT INT Data block number Receive DB No.:
CPU-specific, zero is not
allowed
DBB_NO INPUT INT Data byte number Offset is CPU-specific
NDR
1
OUTPUT BOOL Job completed without
errors, data accepted STATUS parameter == 16#00;
ERROR
1
OUTPUT BOOL Job completed with errors STATUS parameter contains
error details
LEN
1
OUTPUT INT Length of message frame
received 1 LEN 200, specified
in number of bytes
STATUS
1
OUTPUT WORD Specification of the error If ERROR == 1, STATUS
parameter contains error
information
1
The parameter is available until the next call of the FB!