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8 Aggregates
8.1
Logic
C
Logic 1
Purpose
Use the logic block for logical links to multiple input signals.
10 independent logic function blocks are available.
Operation selector
One operation selector
can be activated for each logic block, allowing users to
manipulate the program from the highest main menu level.
Auto, Off
or
On can be selected. Manipulation acts on the output of the logic
function block.
You can set a switch-on and switch-off delay as well as minimum switch-on and
switch-off periods for the output signal on function block C.
Settable times
These time always work (e.g. for an operation selector
manipulation), except
during a wiring test.
You can assign a digital
or
analog signal to each input.
Convert analog to digital
signal
You can generate an analog signal, a 2-point signal (On/Off) via switch on and off
points. The following applies:
Switching value On > switching value Off:
Transition 0
1
Switching value On < switching value Off:
Transition 1
0
The difference between switching value On and switching value Off is the
hysteresis.
Inputs 1, 2 and 3 are internally connected to Logic A.
Internal structure
Inputs 1 and 2 are connected to Logic B.
The logical functions AND, NAND, OR, NOR can be set for Logic A and Logic B.
The results from Logics A and B act on Logic C.
In Logic C, you can select logic functions AND, NAND, OR, NOR , EXOR,
EXNOR.
Logic
Logic
Logic
The logic function blocks are processed in ascending order, from 1 to 10.
Note
The following logic tables show the settable logic functions AND, NAND, OR, NOR,
EXOR and EXNOR using the example of 2 inputs.
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Siemens
Switching and monitoring device RMS705B
CE1P3124en
Building Technologies
Aggregates
01.04.2010