Writing A Test Application - Kontron ThinkIO-P Manual

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6.3

Writing a Test Application

A new POU "PLC_PRG" is created using the programming language "ST".

The following simple application will:

• make a simple assignment in the statement part of the program

• count the variable x

• assign bit 0 of variable x to KBUS output 1 (KBUS_OUT1)

• assign bit 1 of variable x to KBUS output 2 (KBUS_OUT2)

• read KBUS input 1 (KBUS_IN1) and assign to variable kbus_input (bit 0)

• read KBUS input 2 (KBUS_IN2) and assign to variable kbus_input (bit 1)

• assign variable x to PROFIBUS output (PROFIBUS_OUT)

• read PROFIBUS input (PROFIBUS_IN) and assign to variable profibus_input

If the test program can be compiled without any problems it can then be loaded into the

ThinkIO-P PROFIBUS Master.

PROFIBUS will be automatically initialized when the user program starts. The I/O communica-

tion with the slave and reading from and writing to K-Bus modules will start when the program

starts.

ID 29867.06, Rev. 01

PROGRAMMING ASSISTANCE GUIDE

CoDeSys PLC

Page 25

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