Siemens SIMATIC S7-200 - Debugging and Monitoring Your Program; Using First Scan;Multiple Scans to Monitor Your Program; Executing Your Program for a Specific Number of Scans

Basic Concepts for Programming an S7-200 CPU
4-30
S7-200 Programmable Controller System Manual
A5E00066097-02
4.9 Debugging and Monitoring Your Program
STEP 7-Micro/WIN 32 provides a variety of tools for debugging and monitoring
your program.
Using First Scan/Multiple Scans to Monitor Your Program
You can specify that the CPU execute your program for a limited number of scans
(from 1 scan to 65,535 scans). By selecting the number of scans for the CPU to
run, you can monitor the program as it changes the process variables. Use the
menu command Debug >Multiple Scans to specify the number of scans to be
executed. Figure 4-15 shows the dialog box for entering the number of scans for
the CPU to execute.
Execute Scans
OK
Cancel
Program Scan(s)
1
Figure 4-15 Executing Your Program for a Specific Number of Scans