Siemens SIMATIC FM 353 Manual page 123

Note
If the POS_CTRL block is called for several channels/axes, a new instance DB of
the POS_CTRL block is to created for each individual channel/axis. To assign the
datza to the relevant channel/axis, this instance is always to be transferred when
calling the block.
The module address is part of the user data block (AW-DB). It is entered either by
the POS_INIT block or manually via "Parameterize FM 353" using the "Enter mo-
dule address in the user data block" in the overview diagram. The user data block
(AW-DB) must exist.
Information about symbolic programming
Normally, the blocks are entered in the symbol table with the symbol name, ad-
dress, and data type; the symbol table is part of the project and included in the
"FM353_354" block library. If you change the block numbers in your project using
the SIMATIC Manager, the numbering in the symbol table must also be changed.
The block assignment is provided unambiguously via the symbol table.
Before writing and compiling your user program, you must enter the blocks
(AW-DB, FCs, FBs) in the symbol table according to your particular configuration.
The symbolic structure of the interface is stored in the supplied instance data block
DB 1 (IFFM_ICTRL). The symbolic reference is provided via your STEP 7 project −
the symbol table.
The Annex shows the user interface with the appropriate symbols and with the
absolute address.
Example symbol table:
Symbol
IFFM_ICTRL
POS_INIT
POS_CTRL
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
Address Data type
DB 1 FB 1 CPU / FM interface, instance DB to the POS_CTRL
block
FC 0 FC 0 Initialization
FC 1 FC 1 Operating modes, commands and data exchange
Programming the Technological Functions
Comments
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