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