Communications
configuring
System- and communication configuring D7-SYS - SIMADYN D
3-181
Edition 12.2003
The individual connections (I/O), their data types and a connection
description are listed in the following table:
Parameter Declaration
Data
type
Description
REQTAB
INPUT
BOOL
REQTAB = 1: Request to write a new table
REQDB INPUT BOOL REQDB = 1:
Request to write the tabular values which
are saved in the data block
LASTDB
INPUT
BOOL
Last DB for the table
LADDR INPUT WORD
Logical address of the SIMATIC FM 458 application
module
RECNUM
INPUT
BYTE
Data set number for the read and write data set
DBNUM INPUT WORD Data block number of the DB in which the tabular values
are located.
TFT INPUT
DWORD
TIMEOUT time in ms for receiving acknowledge telegrams
from the SIMATIC FM 458 application module.
TABTEL OUTPUT WORD Number of data blocks required to transfer the complete
DB contents
CNTTEL OUTPUT WORD Number of data blocks already transferred to the FM
module
STATUS OUTPUT WORD Indicates the current status of the processing / data
transfer:
0:
Table transfer is inactive
1:
Table transfer is active.
Table values have been partially transferred
from a DB
(wait for the next partial transfer)
2:
Table values have still not been completely
transferred from a data block.
ERROR OUTPUT
WORD If a fault/error occurs while processing the function, then
the return value is an error code
DONE OUTPUT
BOOL
Status parameter DONE=1: Send operation has been
completed
I/O