Beckhoff TwinCAT 2 TX1200, Руководство пользователя

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Integration into TwinCAT
TX1200 16 Version: 1.1
5.2 Integration in TwinCAT (CX9020)
This example describes how a simple PLC program for MP-Bus can be written in TwinCAT and how it is
linked with the hardware. The task is to control an individual flap drive and change it with a button.
Unpacking the example files https://infosys.beckhoff.com/content/1033/tcplclibmpbus/Resources/
zip/12063685643.zip
Hardware
Setting up the components
The following hardware is required:
• 1x Bus Terminal Controller CX9020
• 1x digital 2-channel input terminal KL1002 (for the Open and Close functions)
• 1x MP-Bus master terminal KL6771
• 1x end terminal KL9010
Set up the hardware and the MP-Bus components as described in the associated documentation.
This example assumes that the address of the flap drive is known.
Software
Creation of the PLC program
Create a new PLC project for PC-based systems (ARM) and add the TcMPBus.lib library.
Next, generate the following global variables:
VAR_GLOBAL
bOpen AT %I* : BOOL;
bClose AT %I* : BOOL;
arrKL6771_IN AT %I* : ARRAY[0..11] OF BYTE;
arrKL6771_OUT AT %Q* : ARRAY[0..11] OF BYTE;
stDataKL6771 : DataKL6771;
END_VAR
bOpen: input variable for the Open button.
bClose: input variable for the Close button.
arrKL6771_IN: input variable for the MP-Bus terminal.
arrKL6771_OUT: output variable for the MP-Bus terminal.
stDataKL6771: required for communication with MP-Bus (see DataKL6771 [
}
72] ).
All function blocks with MP-Bus must be called in the same task.
Therefore, create a MAIN program (CFC) in which the KL6771() [
}
25] and MP_DamperLinearActuator()
[ } 30] function blocks are called. Make sure to link the communication block with arrKL6771_IN ,
arrKL6771_OUT and stDataKL6771 .