Templates For Data Blocks; Channel Db - Siemens SIMATIC FM 351 Manual

6.5 Data Blocks
6.5.1

Templates for Data Blocks

The supplied library (FMx51LIB) contains a block template (UDT) for each data
block. Based on these UDTs, you can create data blocks with any number and
name you wish.
6.5.2

Channel DB

Task
The channel DB (see Appendix C.1, page C-2) is the data interface between the
user program and the FM 351. It contains and receives all the data required for
controlling and operating a channel.
Structure
The channel DB is subdivided into various areas:
Module address
Channel number
Number of the parameter DB
Control signals
return signals
Function switches
Trigger bits for write jobs
Trigger bits for read jobs
Done bits
Error bits
Job management for functions
Data for jobs
FM 351 Positioning Module
C79000-G7076-C351-02
Channel DB
*)
Programming the FM 351
*) You can enter the address with
the configuration software
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