semaphore TBOX LT2-530 Series, Руководство пользователя, Страница: 61 / 197

Version : 1.09 61
Communication Variables dedicated to GPRS, 3G,… IP Communication
Some communication variables allow manual handling of GPRS and give information on the status.
Digital Communication Variable
COMx.GPRSCon
Handles the GPRS/3G connection.
Working in manual connection, writing ‘1’ forces a connection; writing ‘0’ forces a
disconnection.
When working with automatic connection, if you reset this variable the connection
will stop, but after maximum 5 minutes, it will be automatically restarted.
USE A TRIGGER INPUT CONTACT TO ACTIVATE THE VARIABLE
Analog Communication Variable
COMx.GPRSState
GPRS: indicates the status of the GPRS connection.
Value=0 : disconnected
Value=1 : currently connecting
Value=2 : connected
Value=3 : currently disconnecting
COMx.IPAddress
GPRS: this register gives the IP address used by
TB
OX
LT2
during its GPRS
connection.
The information is available in a DWORD, but in the list of Tags, you can display it as
an IP address: from the list of Tags, right click the Tag

Display as

IP address.
This information is very important when working with dynamic IP address. It can
be sent for instance by e-mail (see Report Studio), or displayed in a webform, to
inform on IP address changing.
About sending alarms through GPRS/3G
With GPRS, you are able to send e-mail or files using FTP. You create recipient(s) associated to the SMTP
or FTP server you have associated to the GSM/GPRS.
Working with a manual connection, first the RTU establishes the connection and sends the mail and/or
files. Then it stops the connection.
If the connection was already established, the RTU maintains the connection.
Working with an automatic connection, the mail and/or files are sent immediately and the connection
is maintained.
For sending e-mail, you need to use the SMTP server specific to the GPRS connection. Ask
your GSM operator.
Example: gprsmail.myoperator.com