Application and Operation
6.10 Data Logs
Product User Manual
132 Operating Instructions, Version AE 12/2009, A5E01454341C
6.10 Data Logs
The NXG control includes 3 separate data loggers to record events detected by the software.
Each of these logs are stored in non-volatile memory and can be captured by the user via
the VFD’s serial debug port or the Ethernet Port. The debug port is a standard RS232
interface. Data file access via the Ethernet port requires the user to connect a PC running
the NXG Tool Suite software (as described in Section "Tool Suite") to the drive, and
uploading the files to the PC’s hard drive or display.
6.10.1 Fault Log
The Fault Log consists of a circular buffer that records up to 256 faults or alarms. This log
allows the user to access the 256 most recent faults and/or alarms that have been detected.
The faults/alarms are time stamped to a resolution of 1 second, and also include a time
stamp showing when the fault/alarm was reset/cleared.
6.10.2 Historic Log
The Historic Log records operating data of the drive and is frozen upon detection of a fault.
The data recorded consists of both fixed and programmable data points, which are sampled
at the slow loop rate (typically 300-600 Hz). Upon detection of a drive fault by the NXG
software, the fault is recorded at time =0 and the drive continues to record data for a brief
period after the fault. This allows recovery of data just prior to and after any fault so that
operational data prior to and after the fault can be reviewed. Note that a new fault will
overwrite the recorded Historic Log. The Event log includes provisions to copy/record the
historic log so that all fault events are recorded.
6.10.3 Event Log
The Event Log is a very large circular file that is used to record time stamped (1 second
resolution) significant drive events that are encountered. Data in the log includes:
● All Faults/Alarms (essentially Fault Log data)
● Historic Log, if enabled
● Significant Events, including:
– CPU Bootup
– Medium Voltage status
– Drive operating state changes (e.g., idle, magnetize, run, stop, etc.)
– Fault reset requests from usero Menu entries
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