Technical data

Table Of Contents
SFBs for Compact CPUs
System Software for S7-300/400 System and Standard Functions - Volume 2/2
A5E00739858-01
28-49
Special Features for Sending Data
Take the following special features into account when "Sending Data":
With RK512 you can only send an even number of data. If you declare an odd
length (LEN) of data an additional fill byte with the value "0" is appended to the
transmitted data.
In RK512 you can only declare an even offset. If you declare an odd offset the
data are stored in the partner station as of the next lower even offset.
Example: Offset is 7, the data are stored as of byte 6.
Parameters
Parameters Declaration Data
type
Range of
values
Default Description
SYNC_DB
INPUT INT CPU specific,
zero is not
allowed
0 Number of the DB in which
the common data for the
synchronization of the RK-
SFBs are stored (minimum
length = 240 bytes).
REQ
INPUT BOOL TRUE/FALSE FALSE Control parameter "Request":
Activates the job at the
positive edge.
R
INPUT BOOL TRUE/FALSE FALSE Control parameter "Reset".
Job is aborted.
LADDR
INPUT WORD CPU specific W#16#03FF The I/O address of your
submodule, specified by you
in "HW Config".
R_CPU
INPUT INT 0 to 4 1 CPU number of the partner
CPU
(only for multiprocessor
operation)
R_TYPE
INPUT CHAR ‘D’, ‘X’ ‘D’ Address type on the partner
CPU (only uppercase
allowed)
‘D’: Data block
‘X’: Expanded data block
R_DBNO
INPUT INT 0 to 255 0 Data block number on the
partner CPU
R_OFFSET
INPUT INT 0 to 510
(only even
values)
0 Data byte number on the
partner CPU
R_CF_BYT
INPUT INT 0 to 255 255 Connection memory bit on
the partner CPU
(255: Means: no connection
memory bits)
R_CF_BIT
INPUT INT 0 to 7 0 Connection memory bit on
the partner CPU