Designation Of The Inputs; Logical Inputs; Connector X At Sf Inputs - Siemens Logo! Manual

4.3.1 Designation of the inputs

Logical inputs

Here, you will find the description of the connectors you
can use to create a logical link to other blocks or to the in-
puts of the LOGO! unit.
S
S (Set):
A signal at input S sets the output to logical "1".
S
R (Reset):
The reset input R takes priority over all other inputs and
resets the outputs.
S
Trg (Trigger):
This input is used to trigger the start of a function.
S
Cnt (Count):
This input is used for counting pulses.
S
Fre (Frequency):
Frequency signals to be evaluated are applied to this
input.
S
Dir (Direction):
This input determines the direction of count,
for example.
S
En (Enable):
This input enables a block function. When this input is
"0", other signal from the block will be ignored.
S
Inv (Invert):
A signal at this input inverts the output signal of the
block.
S
Ral (Reset all):
All internal values are reset.

Connector X at SF inputs

SF inputs connected to connector x are set low. That is, the
inputs carry a 'lo' signal.
LOGO! Manual
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LOGO! functions
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