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
To Next Page
Loading...
Need help?
General
