Communications configuring
3-180 System- and communication configuring D7-SYS - SIMADYN D
Edition 12.2003
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 3-184).
3.18.1.3 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.
WR_TAB
Block activation
BO EN TABTEL W
Number of data blocks to transfer the
complete DB contents
Request to write a new table
BO REQTAB CNTTEL W
Number of data blocks already
transferred
Request to write the tabular
values in the data block
BO REQDB STATUS W
Actual processing status
Last data block for the table
BO LASTDB ERROR W
If required fault messages
Logical module address
W LADDR DONE B
Status parameter DONE: Send
operation completed
Data set number for the read
and write data set
BY RECNUM
Data block number
W DBNUM
TIMEOUT time for receiving
the acknowledge telegram from
the FM module
DW TFT
Symbol
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