Test Functions And Eliminating Problems; Test Functions - Siemens SIMATIC ET 200SP System Manual

Test functions and eliminating problems

13.1

Test functions

Introduction
You have the option of testing the operation of your user program on the CPU. You can then
monitor signal states and values of tags and can assign values to tags to simulate specific
situations in the running of the program.
Note
Using test functions
The use of test functions can influence the program execution time and thus the cycle and
response times of the controller to a slight extent (a few milliseconds).
Requirements
● There is an online connection to the relevant CPU.
● An executable program is in the CPU.
Test options
● Testing with program status
● Testing with a watch table
● Testing with a force table
● Testing with the LED flash test
● Testing with the trace and logic analyzer function
Testing with program status
The program status allows you to monitor the execution of the program. You can display the
values of operands and the results of logic operations (RLO) allowing you to recognize and
fix logical errors in your program.
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Distributed I/O system
System Manual, 12/2015, A5E03576849-AF