Basic Documentation

13.3 Configuration
13.3.1 Explanation of configuration principle
The controller includes a large number of preconfigured function blocks. The
function blocks available for the various RLU2… universal controllers are shown in
the respective configuration diagrams. They include:
Configuration
diagrams, contents
• Input identifiers (inputs, input functions)
• Function blocks for open and closed-loop control functions
• Aggregates (outputs, output functions)
Project engineers can add connections from the individual input and output
functions (i.e. their internal signals) to the assigned terminals.
Configuration
diagrams, contents
Physical inputs:
Designations used
• D digital
• X universal
Physical outputs:
• Q relay
• Y DC 0…10 V
The following rules and properties apply to inputs:
Use of inputs Xx
• The input identifier can be a device or a special sensor:
Room temperature (ROOM), outside temperature (OUTS), frost protection
(FRST), remote setpoint adjuster, absolute (REL) or relative (REL)
• Multiple use of inputs is possible without limitation (e.g. room temperature as the
main controlled variable and as the maximum economy changeover criterion for
the air damper)
• When an input is connected, the controller presents only the possible units on
the display
• The error message for inputs is only active if the input is connected before
completion of commissioning
• If you change an input identifier (LABEL), all of the settings associated with it
also change (e.g. Xp used to be 28 K, and now it is 10 Pa)
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Siemens Universal Controllers RLU2… CE1P3101en
Building Technologies Appendix 29.08.2008