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Maximum selection
Example
Note
Definition and behavior
Switching on / off
Switch positions
Note
82 / 174
Siemens
Building Technologies
8.5.3
External preselection (IN X)
You can configure an analog input (IN X) as a preselection for the step switch. The
controller performs a maximum selection together with the internal signals.
For example, you can use this feature to implement the following function:
DX cooling control, maximum selection between internal temperature control and
dehumidification signal from an external dehumidification controller.
The external signal is considered only if the controller operates in Comfort or
Economy mode.
8.5.4
Output inversion (INVERS)
You can invert the step switch's analog output. Meaning:
INVERS = NO:
0...100% load = 0...100% output
INVERS = YES:
0...100% load = 100...0% output
The same settings are possible for this analog output as for the modulating output,
AO function block.
If the controller has a linear step switch and is switched off during operation (input
D1 = Protection), the output signal behaves as follows:
INVERS = NO:
0% output
INVERS = YES:
100% output
8.5.5
Function check / wiring test
The step switch can be switched directly via the control switch during the wiring
test.
The switch has the following positions:
---
•
0...100 %
•
Settings such as INVERS, MIN POS and MAX POS are also effective during the
wiring test.
Universal Controllers RLU2...
Aggregates
CE1P3101en
29.08.2008
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