Configuring
4-60 Application Module FM 458-1 DP - User Manual
A5E01078222-02 Edition 03.2009
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
As long as FB WR_TAB transfers data, it is not
permissible that the REQTAB input is reset.
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 458-1 DP application
module
RECNUM INPUT BYTE Data set number for the read and write data set
FB WR_TAB does not support data set numbers 0 and 1.
DBNUM INPUT WORD Data block number of the DB in which the tabular values
are located.
As long as FB WR_TAB transfers data, the data block
number may not be modified.
TFT INPUT DWORD TIMEOUT time in ms for receiving acknowledge telegrams
from the SIMATIC FM 458-1 DP application module.
TABTEL OUTPUT WORD Number of data blocks required to transfer the complete
DB contents
The output is only reset when the next task/job is
activated.
CNTTEL OUTPUT WORD Number of data blocks already transferred to the FM
module
The output is only reset when the next task/job is
activated.
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.
The output is only reset when the next task/job is
activated.
ERROR OUTPUT WORD If a fault/error occurs while processing the function, then
the return value is an error code
Otherwise, SFC58 and SFC59 errors will be displayed.
If an error occurs during communications with the FB TAB,
the error messages of FB TAB or FB TAB_D are directly
displayed.
The output is only reset when the next task/job is
activated.
DONE OUTPUT BOOL Status parameter DONE=1: Send operation has been
completed
The DONE=1 connection is only reset if the next transfer
of table values is initiated.
I/O
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