6 File System and Archive Process
The DXM file system consists of two physical components: the serial EEPROM that stores non-volatile configuration
information and a removable micro SD card that stores file backup data and user created files.
6 EEPROM Files
The serial EEPROM stores basic data that is required to be non-volatile, including network configuration data, IP address,
MAC address, network masks, firewall settings, and authentication information. The controller XML configuration file
created by the
DXM Configuration Tool is stored in EEPROM. The small section of non-volatile local registers is also stored
in EEPROM.
6 Micro SD Card Files
The micro SD card contains most files at the root level. The archive directory contains files kept by the system for history
backup. Archive files are stored in the directory _sxi and are only accessible by removing the SD card.
• Data Log Files
• HTTP Push Files
• User created ScriptBasic file
• ScriptBasic program file
• CmVMon file
• _sxi Archive directory
Data Log files. Users may create up to four data log files using the DXM Configuration Tool. The log files are stored in the
root directory on the SD card. When the file size limit is reached, the filename is changed to include the date and time and
the file is moved into the archive directory _sxi. If a finished log file is to be e-mailed, it will be done at this time and then
moved into the archive directory. Archived log files are deleted based on the Clear Logs parameter.
HTTP Push File. If the DXM Controller is configured to send data to a webserver or host system, the device creates an
HTTP.LOG file on the SD card. The HTTP log is created only if the Logging Interval is non-zero and the HTTP enable log is
set. An entry is placed in the HTTP log file at the Logging Interval specified by the user. At the Push Interval time, the
HTTP log file is sent to the webserver or host system. If the transmission is successful, the HTTP log file is time stamped
and placed into the archive directory (_sxi). If the transmission fails, the file remains in the root directory and subsequent
Logging Intervals are appended to the file and are sent at the next Push Interval. For more information on the
communications retry mechanism, refer to the technicel note on system retries. (DXM Ethernet and Cellular Push
Retries.docx)
ScriptBasic Created Files. Users may use ScriptBasic to create files on the SD card by using the FILEOUT function. The
filenames are fixed and up to five files can be created in the root directory.
ScriptBasic Program File. The main ScriptBasic program that runs at boot time is stored on the SD card in the root
directory.
System Voltage Monitor File. The CmVMon.txt file (Cellular milli-Volt Monitor) is created by the system and is used to
track power events. Every power-up cycle is date/time stamped with the voltage read from the I/O board. The value
24487 is equal to 24.487 volts. If the voltage drops below 11.2 V, another entry is put in the log file indicating the cellular
modem will shut down.
CM 2015-09-22 18:52:43 VMon Power entered normal range 24487
CM 2015-10-13 20:49:47 VMon Power entered normal range 24004
CM 2015-10-16 15:00:20 VMon Power entered normal range 24014
CM 2015-10-19 19:12:26 VMon Power entered normal range 12845
Archive Directory. Only two types of files are moved into the archive directory: data log files and HTTP log files. Data log
files are date/time stamped and placed into the archive directory when the size limit is reached. HTTP log files are date/
time stamped then placed into the archive directory when they are successfully sent to the webserver or host system. If
the HTTP log files were not successfully sent after the retries have been exhausted, the files are placed into a root
directory called sav.
DXM100 Controller Instruction Manual
42 www.bannerengineering.com - Tel: 763.544.3164
To Next Page
Loading...
