Operation; Introduction - Hitachi PC-ARF Technical Catalogue

7 Gateways for building management systems
KNX001

7.3.4 Operation

7.3.4.1 Introduction

A Hitachi Air-Conditioning system is integrated with a KNX system using CSNET WEB and the KNX001 device. The types
of machines to connect are Packaged, and up to 128 units are supported. This interface has different signals. The signals
available fare presented below:
Name
OnOff
Mode
Fan
TempSet
Louver
Central
TIn
TOut
TGas
TLiquid
ErrorCode
StopCause
ValveOpen
OperCondition
Defrost
ExtAmbTemp
Timer
Error Comunicación
CSNET WEB is a device that acts as an interface or gateway between the H-Link bus and an Ethernet connection.
The H-Link bus interconnects Packaged units with CSNET WEB. The Ethernet connection is used by the KNX001 gateway
to access the machines. As a previous step to the configuration of KNX001, CSNET WEB must be configured, along with
the machines or A/C units themselves.
For more information refer to the CSNET WEB documentation.
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TCGB0106 rev.0 - 12/2014
On/Off setting order
Read/Write: ON,OFF
Mode Setting order
Read/Write: COOL, DRY, FAN, HEAT, AUTO
Fan Setting order
Read/Write: LOW, MED, HIGH
Setting Temperature
Read/Write: 17ºC ~ 30ºC
Louver Setting
Read/Write: 8 positions: 0 ~ 7 and AUTO
Central Setting
Read/Write: OnOff, Mode, TempSet, Fan
Inlet Temperature
Read: ºC
Outlet Temperature
Read: ºC
Gas Pipe Temperature
Read: ºC
Liquid Pipe Temperature
Read: ºC
Alarm Code
Read: 0 ~ 100
Compressor Stop Cause
Read: 0 ~ 200
Indoor Unit Expansion Valve Opening
Read: 0 ~ 100
Unit Operation Condition
Read: OFF, THERMO-ON, THERMO-OFF, ALARM
Defrost
Read: On, Off
Ambient Temperature
Read: ºC
Timer disabled
Read/Write: Enabled/Disabled
Error Comunication Unit
It's a signal generated to indicate that the machine is not set into CSNET WEB.
Description/State