Technical Specifications

Modbus RTU and Modbus TCP Protocols - Thermal Management Products
33 Liebert
®
IntelliSlot
®
Modbus/BACnet
Table 10 Liebert Challenger 3000
™
, Liebert Challenger ITR
™
, Liebert CW
™
, Liebert Deluxe System/3
™
,
Liebert DS
™
, Liebert DSE
™
, Liebert HPM
™
, Liebert PeX
™
- Glossary
Controller Liebert iCOM
®
v4
Data Label Data Description
Actual Air Temperature Set Point
The actual set point being used for air temperature control. This
value may differ from [Air Temperature Set Point] if compensation
is applied by the control.
Actual Auxiliary Air Temperature
Actual auxiliary air temperature value being used for control. This
value may differ from the raw value received from the auxiliary
device if filtering is applied.
Actual Cold Aisle Humidity
Actual humidity value being used for cold aisle humidity control.
The value is calculated from multiple humidity measurements using
[Cold Aisle Humidity Calculation Method].
Actual Cold Aisle Temperature
Actual temperature value being used for cold aisle temperature
control. The value is calculated from multiple temperature
measurements using [Cold Aisle Temperature Calculation Method].
Actual Humidity Set Point
The actual set point being used for humidity control. This value may
differ from [Humidity Set Point] if compensation is applied by the
control.
Adjusted Humidity
Humidity value being used for control. This value may differ from
the actual measured [Return Humidity] based on several factors
which may include, but are not limited to, selection of humidity
control sensor and humidity control type.
Air Economizer Availability
Indicates if the outside air conditions are appropriate for cooling
with the air economizer or glycol freecooling.
Air Economizer Control Source Source of control of the air economizer.
Air Economizer Emergency Override
Indoor room temperature has exceeded its upper threshold and the
outdoor air damper has been opened for emergency cooling.
Air Economizer Reduced Airflow Air economizer filter is dirty and needs to be cleaned or replaced.
Air Temperature Control Integration Time
Time value used when system is under integral air temperature
control.
Air Temperature Control Sensor
Sensor from which air temperature measurements will be used for
cooling and heating control.
Air Temperature Control Type
Type of algorithm used to control the system's output air
temperature.
Air Temperature Dead Band
Value that is divided evenly to form a temperature range above and
below [Air Temperature Set Point]. If measured air temperature is
within this range, no heating or cooling will occur.
Air Temperature Proportional Band
Value that is divided evenly to form proportional temperature
control bands above and below [Air Temperature Set Point].
Air Temperature Set Point
Desired air temperature. This set point is dependent upon which
sensor is selected for control.
Airflow Sensor Issue Airflow sensor is disconnected or the signal is out of range.
Ambient Air Sensor Issue Ambient air sensor is disconnected or the signal is out of range.
Analog Input Reading Generic analog input reading (unitless).
Auto Restart Delay
If power is lost, the control will delay this amount of time after power
is restored before restarting the unit.
Aux Air Temp Device Communication Lost
Communication with external auxiliary device providing an air
temperature value has been lost.
Back Draft Control Fan Speed Fan speed when in back draft control mode.
BMS Communications Timeout
Building Management System (or external monitoring system) has
not communicated with the system within the expected timeframe.