Modes And Communications Partners Of The Cp 1242-7 - Siemens SIMATIC NETS7-1200 Operating Instructions Manual

1.3

Modes and communications partners of the CP 1242-7

Modes and communications partners of the CP
For communication with the CP 1242-7 via GPRS, the CP is set to one of the following
modes:
● Telecontrol
● GPRS direct
CP 1242-7
Operating Instructions, 09/2011, C79000-G8976-C247-02
This CP mode allows the GPRS station to exchange data with a telecontrol server.
The telecontrol server is a PC with the "TELECONTROL SERVER BASIC" application
that is connected to the Internet. It is generally located in the master station and is used
for monitoring and control of the remote GPRS stations.
Possible communications partners of the GPRS station with a CP 1242-7 in "Telecontrol"
mode are:
– A telecontrol server
– A central control system (via the OPC interface of the telecontrol server)
– An engineering station (for TeleService)
– Up to 5 000 GPRS stations with a CP 1242-7 logged on with the telecontrol server
You will find detailed information about the "TELECONTROL SERVER BASIC"
application in the documentation, see References in the Appendix.
This mode of the CP is used for direct communication between remote stations via the
GSM network. No telecontrol server is necessary.
To allow network nodes in public wireless networks to be directly accessible, these need
to be addressed using a fixed address. Here, SIM cards with a fixed IP address are used
that allow the stations to address each other directly.
The possible communications services and security functions (for example VPN) depend
on what is offered by the network provider.
Possible communications partners of the GPRS station with a CP 1242-7 in "GPRS
direct" mode are:
– A subscriber that can be reached by the CP via an IP address (for example S7-1200
with CP 1242-7)
– An engineering station (for TeleService)
1.3 Modes and communications partners of the CP 1242-7
Application and properties
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