Analog Multiplexer - Siemens LOGO! Series Manual

LOGO! functions
4.4 Special functions list - SF
Setting the Par parameter (0BA7)
View in programming mode (example):
The view above indicates that the configured shift register bit is S4.8.
This special function is not available in parameter assignment mode.
4.4.28

Analog multiplexer

Short description
This special function outputs one of four predefined analog values or 0 at the analog output.
Symbol in LOGO!
248
Wiring Description
Input En A change in status from 0 to 1 at input En (Enable)
switches a parameterized analog value to the output
AQ, depending on the value of S1 and S2.
Inputs S1 and S2 S1 and S2 (selectors) for selecting the analog value
to be issued.
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•
•
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Parameter V1...V4: Analog values that will be issued.
Range of values: -32768...+32767
p: Number of decimals
Range of values: 0, 1, 2, 3
Output AQ This special function has an analog output. This
output can only be connected with the analog input of
a function, an analog flag or an analog output
connector (AQ1, AQ2).
Range of values for AQ:
-32768...+32767
S1 = 0 and S2 = 0:
Value 1 is issued
S1 = 0 and S2 = 1:
Value 2 is issued
S1 = 1 and S2 = 0:
Value 3 is issued
S1 = 1 and S2 = 1:
Value 4 is issued
Manual, 04/2011, A5E03556174-01
LOGO!