The First Circuit Program - Siemens LOGO! Series Manual

3.7.2

The first circuit program

Let us now take a look at the following parallel circuit consisting of two switches.
Circuit diagram
The corresponding circuit diagram:
Translated into a LOGO! circuit program this means: Relay K1 is (at output Q1) controlled by
means of an OR block.
Circuit program
S1 is connected to the I1 and S2 to the I2 input connector of the OR block.
The corresponding layout of the circuit program in LOGO!:
Wiring
The corresponding wiring:
S1 switches input I1, while S2 switches input I2. The load is connected to the relay Q1.
LOGO!
Manual, 04/2011, A5E03556174-01
Programming LOGO!
3.7 Writing and starting the circuit program
85