Notes On Operation; Connection Modes And Connection Establishment - Siemens SIMATIC NETS7-1200 Operating Instructions Manual

Notes on operation

Minimum clearance to the device
The device may only be operated when the distance between the device (or antenna) and
user is at least 20 cm.
CAUTION
Closing the front panels
To ensure interference-free operation, keep the front panels of the module closed during
operation.
4.1

Connection modes and connection establishment

Note
Connection interrupted by GSM network provider
When using the GPRS service, remember that existing connections can be interrupted by
GSM network providers for maintenance purposes.
Connection modes
● "GPRS direct" mode
● "Telecontrol" mode
If a TCP connection is established, process data is sent as soon as the telecontrol
instructions are called on the CPU.
CP 1242-7
Operating Instructions, 09/2011, C79000-G8976-C247-02
CAUTION
There are no different connection modes in the "GPRS direct" mode.
The CP can be configured for the following connection modes.
– "Permanent" connection mode
There is a permanent TCP connection to the telecontrol server. Following connection
establishment, there is a permanent TCP connection to the telecontrol server even if
data is not transferred permanently.
– "Temporary" connection mode
A connection is only established to the telecontrol server when required.
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