This document discusses free floating logic in KNX home automation systems. Free floating logic allows logic operations to occur between any KNX devices independently, without being tied to a specific device. The document outlines the components of free floating logic, including triggers that initiate the logic, execution conditions that filter the state, logic operations like AND and OR, and result operations that determine what is sent after calculations. An example is provided of using free floating logic for HVAC zone control with 4 zones tied to 4 data entry points, with the final result linking to the main unit or boiler.

1. Australia
FREE FLOATING LOGIC

2. FREE FLOATING LOGIC
Free
fl
oating logic,What is free
fl
oating logic?
Fixed Logic
(
fi
xed to a channel of the device,
in the device)
Free Floating Logic
(Between any devices,
independent of logic device)
Logic
Programming
KNX
Device
KNX
Device
KNX
Device
Logic link
Logic link
Logic
Programming

3. FUNCTIONTRIGGER
Triggers (up to 8 triggers)
A trigger can be an independent object,
A trigger can be any object type, (eg 1 bit, 1 byte, to 4 bytes)
Any change of state will trigger (start the logic / run the logic)

4. EXECUTION CONDITION
Logic Gate
Filters the state.
An object needs to be in a certain state to allow the logic to run,
1 bit to 4 byte,

5. OPERATION
Logic Operation
What you want to occur / calculate / run
• 1-4 operations possible
• Multiple types of calculations
• Operand 1 (
fi
rst link / value)
• Operation (gate, NOT,AND, OR, XOR, NAND, NOR, NXOR
• Result (result of above calculation) (you can use this result
internally for next calculations)

6. RESULT
Result Operation
What you want to send after calculation
• 1bit to 4 byte
• Value you want to send (this must be a calculation result from
operation)
• Condition (if you want to
fi
lter the result, eg send 0 only)
• Sending mode (always, if result is different, periodic)
• Delay, (any delay before sending).

7. LOGIC EXAMPLE
HVAC / HYDRONIC Zone Control
4 Zone. 1 head unit or boiler
Trigger : 1 bit data entry 1, 2, 3, 4.
Condition : Nil
Operation 1 : 1 bit data entry 1, or 1 bit data entry 2, = b1
Operation 2 : b1 or 1 bit data entry 3, = b2
Operation 3 : B2 or 1 bit data entry 4, = b3
Result : B3 no restriction, always.

8. LOGIC EXAMPLE
HVAC / HYDRONIC Zone Control
4 Zone. 1 head unit or boiler
Con
fi
guration : 4 x 1 bit data entries
Linking : 1 bit data entry 1, 2, 3, 4 link to zone on / off
Function result : Link to on / off of main unit / boiler
Group address links

9. SEE ETS PROGRAM
Ets Screen Share

10. END OF SESSION
Please email :
stuart@zennio.com.au
For a copy of the ETS project.