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2 Engineering
Program overview
The following figure shows the call hierarchy of the user program of this application
example:
Figure 2-2
OB 1 cycle
Main
To demonstrate the use of the Ident blocks in a simplified manner, this application
example calls them in a minimal PLC program directly in FB1 "MvControl" of the
OB 1 cycle.
Internally, the "MvControl" block calls the Ident blocks. Each Ident block is
responsible for a specific MV functionality.
The transponder data read and to be written is stored in the "MvData" data block.
The "MvControlInterface" data block includes all the tags of the application
example that are to be modified.
The "ToMv440" data block is automatically generated when creating the
technology object and includes all the data for parameterizing the interface module
and the readers.
Internally, all Ident blocks call the basic block, "Ident_Profile". The Ident blocks are
therefore only a shell around the complex Ident_Profile block. This makes it easier
for the user to implement the RFID functionalities.
The block names describe their basic core functionality. The following ready-to-use
Ident blocks are available for the SIMATIC MV420 / MV440 product portfolio:
MV Basics
Entry ID: 109757269,
V1.0,
MvControl
Ident blocks
Reset_
Reader
Read_MV
Write
Set_MV_
Program
04/2018
Data storage
ToMv440
Ident Profile
MvControl
Interface
MvData
Ident_
Profile
10
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