Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Aggregates 03.10.2011
10.8 Logic
12 21
AB
3
12 21
A
B
3
12 21
A
B
3
12 21
A
B
3
C
C
C
C
The logic block is used to make logical links to multiple input signals.
4 independent logic function blocks are available.
One operation selector
can be activated per logic block to allow the use to
manually intervene at the upper main menu level.
Auto, Off and On can be selected. The intervention 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 off
period for the output signal on function block C.
These time always act (e.g. for an operation selector
intervention), except
during a wiring test.
Each input can be assigned a digital or analog signal.
You can generate an analog signal, a 2-point signal On, Off via switch on and off
points. The following applies:
If switching value On > switching value Off  change from 0  1
If switching value On < switching value Off  change from 1  0
The difference between switching value On and switching value Off represents the
hysteresis.
[Logic A] Inputs 1, 2 and 3 are internally connected to Logic A. [Logic B] Inputs 1
and 2are connected to Logic B. For Logic A and B, logic functions AND, NAND, OR
or NOR can be set.
The results from logics A and B act on Logic C. Here logic functions AND, NAND,
OR, NOR , EXOR or EXNOR can be selected.
d
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xx x x
3
x
Q
A
B
C
Logic Logic
Logic
3123Z03en
The logic function blocks are processed ascending, first 1 then 2.
Purpose
Operation selector
Settable times
Converting an analog
signal to a digital signal
Internal structure
Note