Datasheet

LTX-VCI Datasheet
LTX-VCI Iss1.05
RealTime Control Systems Ltd. Park House, Greenhill Crescent, Watford WD18 8PH. Tel [phone] Fax [phone] Page 14
Web: www.realtime-controls.co.uk , E-mail: [e-mail] LTX-VCI Datasheet Issue 1.05.01 12/07/2003 Doc No. 92101
2.2 Application Network Variables
network input UNVT_Unit_Settings nviUnitSettings
User defined data structure with the following fields
typedef struct {
unsigned int unit_number;
SNVT_hvac_mode hvac_mode;
SNVT_temp_p setpoint;
unsigned int on_off;
unsigned int fan_speed;
unsigned int louver;
unsigned int filter_reset;
unsigned int priority_c_o;
unsigned int operation_ban;
} UNVT_Unit_Settings;
Valid values for these fields are as follows
Field Valid Values
unit_number
1..64
hvac_mode
{AUTO=0, HEAT=1, COOL=3, FAN ONLY=9}
setpoint
18.00-29.00 Degrees Centigrade
on_off
{OFF=0, ON=1}
fan_speed
{AUTO=0, LOW=1, MEDIUM=2, HIGH=3}
louver
{OFF=0, ON=1}
filter_reset
{NORMAL=0, RESET=1}
priority_c_o
{REMOTE=0, CENTRE=1}
operation_ban
{NONE=0, PRESENT=1}
This data structure contains the complete operation commands for a single air-conditioning
unit, addressed by the field .unit_number.
network input unsigned int nviQuery
Range is between 1 and 64 and corresponds to the current unit address being queried, actual
valid range of queries is determined by the selected device VCI mode and the ranges specified
by
Node:UCPTMinUnitNum and Node:UCPTMaxUnitNum.
network input unsigned int nviClearance
Propagates a global unit reset command to the attached A/C interface where such functionality
is available.
network output UNVT_Indoor_Data nvoIndoorData
User defined data structure with the following fields
typedef struct {
unsigned int unit_number;
SNVT_hvac_mode hvac_mode;
SNVT_temp_p setpoint;
unsigned int on_off;
unsigned int fan_speed;
unsigned int louver;
unsigned int filter_state;
SNVT_temp_p indoor_temp;
SNVT_temp_p heat_exch_temp;
unsigned int unit_fault;
} UNVT_Indoor_Data;