Communication via Function Blocks
6.4 Using the Function Blocks with the RK 512 Computer Connection
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01 149
FB P_RCV_RK parameters
The table below lists the parameters of the FB 7 P_RCV_RK for the "Receive data" request.
Table 6- 6 FB 7 P_RCV_RK parameters for "Receive data" request
Name Sort Data type Comment Permitted values, remark
EN_R INPUT BOOL Enables data receipt
R INPUT BOOL Cancels request Cancels the request in progress. Receiving is
disabled. Default: 0
LADDR INPUT INT CP 341 start address The start address is taken from STEP 7.
DB_NO INPUT INT Data block number of the
receive data (destination)
Receive DB no.: CPU-specific, zero is not allowed
(Relevant only for DX data destination)
DBB_NO INPUT INT Data byte number of the
receive data (destination)
0 ≤ DBB_NO ≤ 8190 Receive data starting from
data byte
(Relevant only for DX data destination)
L_TYP
1
OUTPUT CHAR Type of area on local CPU
(destination)
'D': Data block
L_NO
1
OUTPUT INT Data block number on local
CPU (destination)
0 ≤ L_NO ≤ 255
L_OFFSET
1
OUTPUT INT Data byte number on local
CPU (destination)
0 ≤ L_OFFSET ≤ 510
L_CF_BYT
1
OUTPUT INT Interprocessor
communication flag byte on
local CPU
0 ≤ L_CF_BYTE ≤ 255255 means: without
interprocessor communication flag
L_CF_BIT
1
OUTPUT INT Interprocessor
communication flag bit on
local CPU
0 ≤ L_CF_BIT ≤ 7
NDR
1
OUTPUT BOOL Request completed without
errors, data accepted
STATUS parameter == 16#00;
ERROR
1
OUTPUT BOOL Request completed with
errors
Error information is written to the STATUS
parameter.
LEN
1
OUTPUT INT Length of the message
frame received
0 ≤ LEN ≤ 4096, specified in number of bytes
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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