Siemens SIMADYN D FM 458 User Manual page 91

Configuring
The individual connections (I/O), their data types and a connection
I/O
description are listed in the following table:
Parameter Declaration
REQTAB INPUT
REQDB INPUT
LASTDB INPUT
LADDR INPUT
RECNUM INPUT
DBNUM INPUT
TFT INPUT
TABTEL OUTPUT
CNTTEL OUTPUT
STATUS OUTPUT
ERROR OUTPUT
DONE OUTPUT
4-36
Data type Description
BOOL REQTAB = 1:
BOOL REQDB = 1:
which are saved in the data block
BOOL Last DB for the table
WORD Logical address of the SIMATIC FM 458 application
module
BYTE Data set number for the read and write data set
WORD Data block number of the DB in which the tabular values
are located.
DWORD TIMEOUT time in ms for receiving acknowledge
telegrams from the SIMATIC FM 458 application module.
WORD Number of data blocks required to transfer the complete
DB contents
WORD Number of data blocks already transferred to the FM
module
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.
WORD If a fault/error occurs while processing the function, then
the return value is an error code
BOOL Status parameter DONE=1: Send operation has been
completed
Request to write a new table
Request to write the tabular values
Application Module FM 458 - User Manual
6DD1904-0AE0 Edition 12.2001