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A detailed description of the "Automatic mode: Communications" mode to
transfer tables from an S7 control to a SIMATIC FM 458 application
module is provided in the Section "Automatic mode: Communications"
(Page 4-40).
4.5.1.3 Function block WR_TAB
The function block WR_TAB is used to transfer tables from one S7
control to a SIMATIC FM 458 application module. The tabular values
(permissible data types are REAL and double integer) are saved in a data
block. They are transferred from WR_TAB to the function blocks TAB and
TAB_D on the SIMATIC FM 458 application module, which then internally
manages the tabular values.
The WR_TAB should be configured on the control side. The tabular
values are transferred from one S7-400 control to a SIMATIC FM 458
application module via the P bus. All of the values are always transferred,
which are in the DB specified at the DBNUM input.
Symbol
Block activation ― BO
Request to write a new table ― BO
Request to write the tabular
values in the data block
Last data block for the table ― BO
Logical module address ― W
Data set number for the read
and write data set
Data block number ― W
TIMEOUT time for receiving
the acknowledge telegram
from the FM module
Application Module FM 458 - User Manual
6DD1904-0AE0
Edition 12.2001
WR_TAB
EN
TABTEL
REQTAB
CNTTEL
― BO
REQDB
STATUS
LASTDB
ERROR
LADDR
DONE
― BY
RECNUM
DBNUM
― DW
TFT
Configuring
W ― Number of data blocks to transfer the
complete DB contents
W ― Number of data blocks already
transferred
W ― Actual processing status
W ― If required fault messages
B ― Status parameter DONE: Send
operation completed
4-35
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