HMS INMBSHIT016O000, User Manual, Page: 7 / 24

Intesis
TM
Home Automation (WMP)
– Hitachi VRF
User Manual r1.0 EN
© HMS Industrial Networks S.L.U. - All rights reserved
This information is subject to change without notice
URL http
s
://www.intesis.com
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2.
Intesis WMP interface
In this section, a common description for all Intesis WMP series gateways is given, from the point of view of the
Home Automation system which is called from now on
internal system. Connection with the Hitachi VRF system is
also called from now on external system .
There is a specific Home Automation (WMP) manual available about WMP protocol with available examples. Here
is included the specific information regarding to WMP protocol and its integration in this product, for further
explanations, refer to the refered WMP manual available in
www.intesis.com .
2.1. HVAC WMP Commands supported
Intesis WMP commands SET/CHN/GET can be used with the different WMP functions.
2.2. HVAC WMP Functions allowed
Depending on the signal, different commands are allowed. WMP protocol uses different functions to refer to different
signals of the HVAC system.
In the table below are listed the available WMP signals for the HVAC control, the function to identify the signal, its
available values and the commands allowed to interact with them.
OUTDOOR UNITS SIGNALS
Signal description Function Values Commands
Comm Error OU ERROROU OK/ERR CHN/GET
INDIVIDUAL UNITS
Signal description Function Values Commands
On/Off ONOFF ON/OFF SET/CHN/GET
Operation Mode MODE HEAT/COOL/FAN/DRY/AUTO SET/CHN/GET
Fan Speed FANSP 1/2/3/4/AUTO SET/CHN/GET
Vane Position VANEUD 1/2/3/4/5/6/7/AUTO SET/CHN/GET
Temperature Setpoint (x10) (ºC) SETPTEMP (ºC) SET/CHN/GET
AC Ambient Temperature (x10) (ºC) AMBTMP (ºC) CHN/GET
Unit Error code (0-No Error,X-Error) ERRCODE 0/X (see user manual) CHN/GET
Error IU ERRSTATUS OK/ERR CHN/GET
2.3. Link with Home Automation system
This gateway supports one IP connection to communicate with the home automation hub or central controller but
allows to communicate with several AC units. To identify the ac unit to control from the Home Automation side, WMP
protocol has implemented the acnum parameter. Basically, this parameter links the home automation side identifying
the AC unit to control in the AC system.
Given an AC unit, all its individual signals have one unique acnum and this number is always different among all the
ac units configured in the gateway. Only in some specific cases, outdoor units might share the acnum with one
indoor unit as the commands are independent between themselves.
Acnum is given in the configuration section. See
4.2.5 H
ITACHI CONFIGURATION
for more information.