Siemens 6GK7242-7KX30-0XE0 ユーザーズマニュアル

Configuration and programming

5.4 Programming the telecontrol instructions

CP 1242-7
Operating Instructions, 03/2012, C79000-G8976-C247-03

Note the maximum number of parallel connections in the section Performance data

NOTICE

Connection abort
If an existing connection is aborted by the communications partner or due to disturbances

on the network, the connection must also be terminated by calling "TC_DISCON". Make

sure that you take this into account in your programming.

Application example for the "TC_CONFIG" instruction

With the "TC_CONFIG" instruction, you cannot permanently overwrite the configuration data

of the CP 1242-7. This can have practical applications if you want to activate a TeleService

partner temporarily by setting an input and this partner is disabled in the default

configuration.

5.4

Programming the telecontrol instructions

5.4.1

TC_CON: Establish connection via the GSM network

Meaning

The TC_CON instruction allows an S7-1200 with a CP 1242-7 to establish a connection of

the following types:
● ISO-ON-TCP

Connection partner is a CP 1242-7.
ISO-ON-TCP connections are used only in "GPRS direct" mode.

● UDP

Any connection partner is possible.

● SMS

The connection partner is an SMS client.

● Telecontrol connection

The connection partner is either a telecontrol server or another station that can be

reached via the telecontrol server.

A TC_CON establishes exactly one connection. Depending on the mode of the CP 1242-7

and the protocol you are using, a maximum of 3 to 5 simultaneous connections with unique

IDs (see below) are supported per CP. You will find the maximum number of simultaneous

connections in the performance data of the CP.