POS MV V5 Installation and Operation Guide
System
Operation
5-14
Start Logging – Removable Media
AutoLog
If AutoLog is enabled (refer to Figure 46 on page 5-12), logging starts automatically on PCS power-up. If
AutoLog is enabled and there is no USB flash drive in the logging bay, the Logging light will turn red. If
this occurs, insert a USB flash drive and start manually as described in the following paragraphs.
Manual Start
Press the Logging button on the PCS front panel and hold for at least 2 seconds to begin.
An alternate method to start logging is to click the MV-POSView
Start Logging
button on the USB
Logging Control screen (Figure 46, page 5-12).
For a description of the logging status lights, refer to Table 34.
Stop Logging – Removable Media
Logging is stopped manually by pressing the Logging button on the PCS front panel and holding for at
least 2 seconds. Logging stops after about six seconds.
An alternate method to stop logging is to click the MV-POSView
Stop Logging
button on the USB
Logging Control (Figure 46, page 5-12) screen.
Logging data to the removable media may be stopped and restarted repeatedly. Restarting the logging
process causes a new file to be opened with the same kernel name. If a new kernel name is assigned,
the new file is viewed as a new mission.
Note
: A data gap is treated as a new mission. The system can tolerate a 0.015 ms (maximum) IMU data
gap.
Logged Data
Data are logged to the removable media in approximately 12-Megabyte (MB) files. If POS MV loses
power while logging data to the USB flash drive, the amount of mission time lost will depend on how
many groups were selected for output. The fewer the groups the less information recorded per minute, a
longer time to fill a 12 MB file and the more mission time that may be lost.
Remove the USB flash drive
Do not remove a USB flash drive from the logging bay when the
logging light is on; the PCS may still be writing to the device. If
the USB flash drive is removed when the logging light is on,
there is a chance that all mission data will be lost.
Stop logging before attempting to remove the USB flash drive from the logging bay.