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3.11 Data Recorder
The APX Control System contains a built-in data recorder with 3 megabytes of memory. The recorded data can be
downloaded from the data recorder using either the TRU-Tech/TRU-View program or a Data Transfer USB mem-
ory device.
The data recorder reads the same input information as the control system (Functional Parameters, Configurations,
and Unit Data) at all times. The data recorder records events as they occur, such as setpoint changes and defrost
initiation and termination, and also records all data values including temperature sensors and pressure transducers
in either averaged or snapshot format at selected intervals.
The following intervals are available for sensor recording:
• 1 Minute
• 2 Minutes
• 5 Minutes
• 10 Minutes
• 15 Minutes
• 30 Minutes
• 1 Hour
• 2 Hours
• 4 Hours
3.11.1 APX Control System Information
The APX Control System information that may be recorded is as follows:
• Data recorder time clock date / time
• Setpoint
• Data recorder settings (Logging Intervals,
Events and Sensors)
• Trailer (asset or car) ID
• Unit Serial Number
• Unit Model Number
• Controller Serial Number
• Controller Software Revision
• Pretrip Start/End
• Functional Parameters
• Control System Configurations
• Current System Operating mode
3.11.2 Data Recording
The data recorder data comes from four general categories of information:
1. APX Control System Information as described in the preceding Section 3.11.1
2. Sensor data
This information is recorded at pre-determined intervals as a snapshot of the sensor at the time of the recording, or
an average of the sensor readings since the last recording based on 1 minute increments. The user can determine
which sensor(s) will be recorded, whether snapshot or averaged readings are preferred and at what time intervals.
(Snapshot readings are also taken at the beginning and end of defrost and at the time of a shutdown alarm.)
All of the sensors and transducers that may be read under Unit Data (refer to Table 3–1) may be included or
excluded from the recordings.
3. Event Occurrences
This information is any additional data that is recorded on a “when it occurs” basis. Events are recorded by the
recorder as they occur. An Event is defined as something that happens and may include:
• Setpoint change
• Defrost cycle start/Defrost cycle end
• START/RUN - OFF switch on (START/RUN
position)
• Pretrip start
• Pretrip end
• Unit mode
• Control mode
• Door and Remote switch activations
• Hour Meter readings (Hour meters are recorded
at midnight or the first time of day the START/
RUN- OFF switch is toggled from the OFF posi-
tion. There will be no hour meter readings when
the switch is in the OFF position.
4. User Area Data
The User or service technician may enter a comment into the data recorder using the TRU-Tech program.
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