Pro-face PS5000 Series - Page 97

PS5000 Series (Slim Panel Type Atom Model) User Manual
97
Connection Principles
GPRS communication requires a SIM card and a specific GPRS contract with a service provider.
The GPRS connection is always initiated from the module to the GPRS network.
It is not possible for a client application to open a connection by directly dialing the Cellular module.
Nevertheless, the Cellular module provides various solutions to connect to the GPRS network:
Permanent mode:
 Automatic connection at startup, restart or after connection loss.
On-demand mode:
 Callback function: opens the connection upon receiving an incoming GSM or PSTN call.
 Autonomously on a process or application condition.
The Cellular module connects the APN (
access point name ) of the service provider and receives
an IP address back that can be static or dynamic.
The Cellular module supports both static and dynamic IP addresses. If the address is dynamic, it
is necessary to inform the remote application of the new IP address.
NOTE:
 GPRS uses the DNS server of the service provider; it replaces the DNS server configured in the
Slim Panel.
 The default gateway set in the Ethernet configuration of the Slim Panel is not used with a GPRS
connection. The default route of the GPRS connection is used instead. Thus, it is not possible
to route through Ethernet when the module is connected to the GPRS network.
GPRS Contracts
GPRS service providers offer dedicated services adapted to industrial applications, also called
M2M (
machine to machine ).
Service providers offer GPRS contracts with different options. The main options are:
 Public or private IP address: Choose a contract that gives you a public IP address to be
accessible directly from the Internet.
 Static or dynamic IP address.
 Incoming TCP ports blocked or not: Some providers offer only subscriptions with TCP ports
blocked for security reasons. For example, some provider block ports that are lower than 1024.
NOTE:
 For ease of use and configuration, you should choose a contract that does not block TCP ports
and provides a static IP address.
 If your service provider blocks the public ports (< 1024), you must use a VPN and choose a
contract that authorizes VPN traffic.
Device Manager and Hardware Installation
Install the driver before you install the interface module into the Slim Panel. The driver installation
media is included with the package. After the interface module is installed, you can verify whether
it is properly installed on your system through the Device Manager.