Intesis
TM
KNX
– HITACHI VRF
User Manual r1.2 EN
© HMS Industrial Networks S.L.U. - All rights reserved
This information is subject to change without notice
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1. Device configuration
1.1. Physical Address.
KNX physical address of the device in the network
1.2. Extended Addresses.
Enables usage of KNX Extended addresses (range from 16/0/0 to 32/7/255).
2. Operating Mode.
Settings related to KNX interface for control and feedback of AC unit’s operating mode.
2.1. KNX DPT for HVAC operation mode comm object. Base DPT.
Base DPT to use for control/monitor the
operating mode. Following DPT types are offered:
o
DPT_20.105. DPT_HVACContrMode: 0-Auto, 1-Heat, 3-Cool, 9-Fan, 14-Dry
o
DPT_5.x (non-standarized): 0-Auto, 1-Heat, 2-Dry, 3-Fan, 4-Cool
2.2. KNX DPT for HVAC operation mode comm object. Extra DPT.
Additional DPT to use for control/monitor
the operating mode.
o
DPT_1.100. DPT_Heat/Cool: 0-Cool, 1-Heat.
o
DPT_5.001. DPT_Scaling: Enables objects “Control_ Heat Mode & On” and “Control_ Cool Mode &
On”. Their type is DPT_Scaling (0..100%), and their ending is to be able to control parameters On/Off,
Cool/Heat of indoor unit from a single percentage object. They are meant to provide compatibility with
certain thermostats oriented to the operation of valves for Heating/Cooling. Whenever a value > 0% is
received at each of these two objects, the corresponding operating mode and ON operation is sent to
the indoor unit. Whenever both values are 0%, indoor unit is set to OFF
2.3. Use of 1-bit Operating Modes.
1-bit Control Objects.
Enables a bit-type object for the control of each
operating mode.
2.4. Use of 1-bit Operating Modes.
1-bit Status Objects.
Enables a bit-type object for monitoring each
operating mode.
3. Temperature Sensor.
3.1. Ambient temperature provided from KNX.
Enables object Control_ KNX ambient temperature.
NOTE:
Indoor unit does not accept, by itself, that an ambient temperature for control of operation
of the indoor unit is provided. To allow regulation of indoor unit according to a temperature reference
from KNX, what Intesis does is passing a different temperature setpoint to the indoor unit than the
one required by the user. The passed setpoint is such that the difference ‘Ambient temperature
reported by Hitachi IU
– AC setpoint’ is equal to ‘Ambient temperature reported by KNX – AC
setpoint required by KNX’, using the following formula:
“AC Setp. Temp” = “AC Ret. Temp” - (“KNX Amb. Temp.” - “KNX Setp. Temp”)
Where:
▪
AC Setp. Temp: AC indoor unit setpoint temperature
▪
AC Ret. Temp: AC indoor unit return temperature
▪
KNX Amb. Temp.: Ambient temperature provided from KNX
▪
KNX Setp. Temp: Setpoint temperature provided from KNX
Consequently, when using this feature (Ambient temp provided from KNX), setpoint at AC and
setpoint in KNX will not necessarily be the same (actually, user will not be able to operate setpoint
from AC System controllers as the remote controller).
!
