– 17–
6.5.2 PI Heating Demand Attribute
The attribute can only be read. An unsigned integer is supplied when reading, this representing the current
valve position.
0 = Valve closed
255 = Valve opened
6.5.1 Application Version Attribute
With every release of the ZigBee microcontroller’s firmware the application version attribute will be incre-
mented (e.g. from 0x01 to 0x02). A revision history is provided separately
6.5.4 Current Temperature Setpoint
6.5.3 Errors
Bit
7
6
5
4
3
2
1
0
Error
reserved
reserved
Valve not
Moving (E3)
Valve
Movement too
slow (E2)
Valve Adaptati-
on Failed (E1)
reserved
reserved
reserved
Any value written to Thermostat / Occupied / Unoccupied Heating Setpoint attribute (0x0012 or 0x0014) will
automatically be copied to the Current Temperature Set point attribute (0x4003) to allow operating the TRV
without the need to be aware of the customer specific attributes.
