Introduction - Siemens SIMADYN D FM 458 User Manual

Configuring
4.5 Table function

4.5.1 Introduction

The table function in SIMATIC TDC / SIMADYN D provides the user with
the possibility of linking-in and using tabular values (values in a table) in a
configured software application. In this case, the function blocks TAB and
TAB_D must be configured on the SIMATIC TDC and SIMADYN D sides.
Tabular values, data type REAL are managed using the TAB and data
type DINT, using TAB_D. The user provides the tabular values.
The table function can be configured in three modes:
• Manual mode, i.e. the tabular values are directly entered at the block
• Automatic mode: Communications, i.e. the tabular values are
• Automatic mode: Memory card, i.e. the tabular values are
The "Automatic mode, memory card" mode is presently still not
NOTE
available.
It should be noted, that it is only possible to toggle the modes between
"Manual mode" and "Automatic mode: Communications" as well as
"Manual mode" and "Automatic mode: Memory card".
A validity check is made if the tabular values have been entered or
transferred. The address of the table is displayed at "TAB" output.
The tabular values are managed twice, i.e. in two tables. The table,
defined as "valid" (=active) is used for all arithmetic/computation
operations of the configured application software. The "invalid" (=inactive)
table is used to manage value changes. All of the tabular values, changed
by the user, are initially transferred into the invalid table. If the inactive
table is activated, the new tabular values are mirrored in the second table.
The table which had been active up until then automatically becomes
invalid. This means that the new tabular values are available in both
tables.
Both tables can be saved in the SAVE area which is backed-up (buffered)
by a battery in order to prevent data loss (connection SAV=1 when
initializing).
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via an online interface (e.g. CFC in the test mode), or transferred to
the block using teach-in from the program (refer to Fig. 1).
transferred via a communications interface (TCP/IP, DUST1, S7 via P
bus). In order to transfer tabular values from an S7 control to a
SIMATIC FM 458 application module via the P bus, in addition, the
WR_TAB should be configured on the S7 control side (refer to Fig. 2).
downloaded into the memory card using PC software (D7-SYS
additionalComponentBuilder), and are transferred when the module is
initialized.
Application Module FM 458 - User Manual
6DD1904-0AE0 Edition 12.2001