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The Four Golden Rules For Operating Logo - Siemens LOGO! Manual

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Programming LOGO!

3.5 The four golden rules for operating LOGO!

The four golden rules for operating LOGO!
Rule 1: Changing the operating mode
● You create the circuit program in programming mode. After power is on, and when the
display shows "No Program / Press ESC", press the ESC key to select programming
● Timer and parameter values of an existing circuit program can be edited both in
parameter assignment mode and in programming mode. During parameter assignment
LOGO! is in RUN mode; that is, it continues executing the circuit program (see the topic
"Configuring LOGO! (Page 215)"). To work in programming mode, you need to terminate
the circuit program by calling the "Stop" command.
● Select the 'Start' command on the main menu to set RUN mode.
● When the system is in RUN, you can return to parameter assignment mode by pressing
the ESC key.
● When parameter assignment mode is open and you want to return to programming
mode, select the "Stop" command from the parameter assignment menu, and confirm
"Stop Prg" prompt with "Yes". To do so, move the cursor to "Yes" and confirm with OK.
For more details on operating modes, refer to the Appendix topic "LOGO! Menu structure
(Page 279)".
The following applies to 0BA2 device versions and earlier:
• You can open programming mode by pressing
• You set parameter assignment mode by pressing ESC+OK.
Rule 2: Outputs and inputs
● Always create your circuit program by working from the output to the input.
● You can connect an output to several inputs, but not the same input to several outputs.
● Within the same program path you may not connect an output to an upstream input. For
such internal recursions you should interconnect flags or outputs.
+ +OK.
Manual, 10/2017, A5E01248535-AA


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