Table 6- 4 Fb 8 P_Snd_Rk Parameters For "Send Data" Request - Siemens Simatic S7-300 CP 341 User Manual

Communication via Function Blocks
6.4 Using the Function Blocks with the RK 512 Computer Connection
Assignment in the data area
The FB P_SND_RK works together with an I_SND_RK instance DB. The DB number is
passed on with the call. The instance data block is 62 bytes long. Access to the data in the
instance DB is not allowed.
FB P_SND_RK parameters
The table below lists the parameters of the FB 8 P_SND_RK for the "Send data" request.
Table 6- 4 FB 8 P_SND_RK parameters for "Send data" request
Name Sort
SF INPUT
REQ INPUT
R INPUT
LADDR INPUT
DB_NO INPUT
DBB_NO INPUT
LEN INPUT
R_CPU_NO INPUT
R_TYP INPUT
R_NO INPUT
R_OFFSET INPUT
R_CF_BYT INPUT
R_CF_BIT 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
CHAR Selection for Send data or Fetch
data
BOOL Initiates request on positive edge
BOOL Cancels request
INT CP 341 start address
INT Data block number of source
INT Data byte number of source
INT Data length of the message frame
to be sent
INT CPU number of the partner CPU
CHAR Address type on the partner CPU
INT Data block number on the partner
CPU
INT Data byte number on the partner
CPU
INT Interprocessor communication flag
byte on partner CPU
INT Interprocessor communication flag
bit on the partner CPU
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
SF = 'S' (Send)
Default: 'S'
Cancels the request in progress.
Transmission is disabled. Default: 0
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; only even-numbered values
are appropriate
0 ≤ R_CPU_NO ≤ 4,
only with multiprocessor mode; default
value: 1
'D': Data block
'X': Expanded data block
0 ≤ R_NO ≤ 255
0 ≤ R_OFFSET ≤ 510, even-numbered
values only
0 ≤ R_CF_BYTE ≤ 255
Default: 255 (means: without
interprocessor communication flag)
0 ≤ R_CF_BIT ≤ 7
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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