Viewing A Program In Ladder Or Statement List - Siemens Simatic S7-200 CPU 210 System Manual

Viewing a Program in Ladder or Statement List

You can view a program in either ladder or STL by selecting the menu command View
or View Ladder, as shown in Figure 2-7.
When you change the view from STL to ladder and back again to STL, you may notice
changes in the presentation of the STL program, such as:
Instructions and addresses are changed from lower case to upper case.
Spaces between instructions and addresses are replaced with tabs.
You can accomplish the same formatting of the STL instructions by selecting the menu
command CPU
Note
Certain combinations of statement list instructions cannot successfully be converted to
ladder view. In that case, the message "Illegal Network" marks the section of code that
cannot be represented in ladder. You can view the STL instructions for the "illegal" network
by clicking on the network title. Use the STL Editor to modify an illegal network so that it
can be viewed in ladder.
STEP 7-Micro/WIN - c:\microwin\project1.prj
Project Edit View CPU Debug Tools Setup Window Help
Ladder Editor - untitled.ob1
Contacts
Network 1
"Start1" "E-Stop1"
Figure 2-7 Changing the Program View from Ladder to Statement List
S7-200 Programmable Controller, CPU 210
C79000-G7076-C235-01
Installing and Using the STEP 7-Micro/WIN Version 2.0 Software
Compile while the STL Editor is active.
View
STL
Ladder
Data Block
Symbol Table
F2 Normally Open
STL
Status Chart
Cross Reference
Start/stop switch
Element Usage
Q0.0
Symbolic Addressing Ctrl+Y
Toolbar
Status Bar
Zoom...
F3
F4 F5 F6 F7 F8
STL Editor - untitled.ob1
NETWORK 1 //Start/stop switch
LD "Start1"
AN "E-Stop1"
= Q0.0
NETWORK 2 //End
MEND
STL
F10
2-9