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4.4.2 FTP server
requirements
4.4.3 Brief operating
description and
file structure
4.4.4 Structure
4.4.4.1 CFG File
(configuration)
4-22
Point to Point and FTP Communication
FTP server requirements:
A STATIC IP address is required for the FTP server.
The following information regarding the ftp server must be available to set-
up correctly remote units and controller PC:
IP address (it is the static IP address assigned to the ftp server)
User name and Password (to be allowed to exchange data with the ftp
server)
Username and Password must only contain alphanumeric characters;
any special characters are not allowed.
Basically, at scheduled times, the AMS-8061 regularly establishes, via the
selected channel, a connection to the server through FTP:
•
First it loads, if any, all the (new) settings which have been written
by the (client) application.
•
Then it writes all data that have been requested by the application.
•
Finally it erases all previous required settings in order to avoid
reloading them at the next connection. Note that data related to
field measurements are never deleted by the station.
After that the connection is terminated.
To avoid having multiple stations that store data in the same directory every
data exchange is done on a directory named as the serial number of the
monitoring station itself. Here, an example of directory structure:
FTP_Root
000WE41003
8061.CFG
8061.set
8061FLD.TXT
17_08_01_07_09_.D61
Directories are created by the control software, at the first connection to the
server, after the station parameter set-up has been completed. Remote
station will not create any directory. The user must ensure that the
directory have been created before operating the remote station.
Whenever the AMS-8061 connects to the GSM network and accesses to
FTP server, it looks for a file named 8061.CFG in its directory (its serial
number). If the file is present, the AMS-8061 retrieves it and calculates the
checksum in order to use it and thus get the new configuration. If the
checksum is wrong, the file is discarded otherwise the new configuration is
taken.
Is important to note that the new setting will not take effect immediately but
only after the connection is closed.
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