Debugging And Monitoring Your Program; Using Single/Multiple Scans To Monitor Your Program; Displaying The Status Of The Program In Ladder Logic - Siemens Simatic S7-200 CPU 210 System Manual

Installing and Using the STEP 7-Micro/WIN Version 2.0 Software
2.9

Debugging and Monitoring Your Program

Using Single/Multiple Scans to Monitor Your Program

You can specify that the PDS 210 execute your program for a limited number of scans (from
1 scan to 65,535 scans). By selecting the number of scans for the PDS 210 to run, you can
monitor the program as it changes the process variables. Use the menu command
Debug Execute Scans... to specify the number of scans to be executed. Figure 2-14
shows the dialog box for entering the number of scans for the CPU to execute.
Execute Scan
Figure 2-14 Executing Your Program for a Specific Number of Scans

Displaying the Status of the Program in Ladder Logic

As shown in Figure 2-15, the program editor of STEP 7-Micro/WIN allows you to monitor the
status of the online program. (The program must be displaying ladder logic.) This allows you
to monitor the status of the instructions in the program as they are executed by the CPU.
STEP 7-Micro/WIN - c:\microwin\house.prj
Project Edit View CPU Debug Tools Setup Window Help
Contacts
Network 1
I0.3
T0
>=I
+600
Figure 2-15 Displaying the Status of a Program in Ladder Logic
2-16
Execute 1 program scan(s)
Debug
Execute Scans...
Ladder Status On
Normally Open
F2
Sound the alarm!
M0.1
S
1
I0.2 Q0.3
S
1
M0.2
R
OK
Cancel
F3
F4 F5 F6 F7 F8
S7-200 Programmable Controller, CPU 210
C79000-G7076-C235-01
F10