Siemens SIMATIC S7-200

Pulse Operated Switch
3.6 Pulse-operated switch
Getting Started - Advanced
28 Training Documents, 09/2007, A5E01469795B
3.6 Pulse-operated switch
Now that you know the function of Bit Memory (M addresses), you will be able to understand
the solution of the pulse-operated switch.
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Place a coil here for setting bit
memory M0.0. The number under
the coil indicates how many bits
are to be set counting from the
specified starting address. 1 sets
one bit at bit memory address
M0.0.
M0.0 is set if Q0.5 was not active
("false")
Since the lower branch
implements the inverted function of
the upper branch, bit memory
address M0.0 is reset, or switched
off, if power flows through this
branch as the result of I0.0 contact
closure.
M0.0 is reset, if Q0.5 was active
("true")
Finally, complete the example in your current exercise project in STEP 7-Micro/WIN as
shown above.