Communication via Function Blocks
6.3 Using the Function Blocks with the 3964(R) Procedure
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
134 Manual, 09/2008, A5E02191071-01
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 Data type Comment Permitted values, remark
REQ INPUT BOOL Initiates request on positive
edge
R INPUT BOOL Cancels request Cancels the request in progress.
Transmission is disabled.
LADDR INPUT INT CP 341 start address The start 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 Send data starting from
data byte
LEN INPUT INT Data length 1 ≤ LEN ≤ 4096, specified in number of bytes
DONE
1
OUTPUT BOOL Request completed without
errors
STATUS parameter == 16#00;
ERROR
1
OUTPUT BOOL Request completed with
errors
Error information is written to the STATUS
parameter.
STATUS
1
OUTPUT WORD Specification of error If ERROR == 1, the STATUS parameter will
contain error information.
1
The parameter is available until the next time the FB is called.
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