Table 6- 2 Fb P_Snd_Rk Parameters - Siemens Simatic S7-300 CP 341 User Manual

Communication via Function Blocks
6.3 Using the Function Blocks with the 3964(R) Procedure
FB P_SND_RK parameters
The table below lists the parameters of the FB P_SND_RK.
Note
The R_CPU_NO, R_TYP, R_NO, R_OFFSET, R_CF_BYT, and R_CF_BIT parameters are
irrelevant for the 3964(R) procedure and do not have to be assigned. The SF parameter also
does not have to be assigned since 'S' for sending is entered by default.
Table 6- 2 FB P_SND_RK parameters
Name Sort
REQ INPUT
R INPUT
LADDR INPUT
DB_NO INPUT
DBB_NO INPUT
LEN INPUT
DONE OUTPUT
1
ERROR OUTPUT
1
STATUS OUTPUT
1
The parameter is available until the next time the FB is called.
1
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Data type Comment
BOOL Initiates request on positive
edge
BOOL Cancels request
INT CP 341 start address
INT Data block number
INT Data byte number
INT Data length
BOOL Request completed without
errors
BOOL Request completed with
errors
WORD Specification of error
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Permitted values, remark
Cancels the request in progress.
Transmission is disabled.
The start address is taken from STEP 7.
Send DB no.: CPU-specific,
zero is not allowed
0 ≤ DBB_NO ≤ 8190 Send data starting from
data byte
1 ≤ LEN ≤ 4096, specified in number of bytes
STATUS parameter == 16#00;
Error information is written to the STATUS
parameter.
If ERROR == 1, the STATUS parameter will
contain error information.
Manual, 09/2008, A5E02191071-01
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