Siemens S7-1200 TELECONTROL User manual

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SIMATIC NET
S7-1200 - TeleControl
CP 1242-7 GPRS V2
Operating Instructions
10/2016
C79000
-G8976-C311-02
Preface
Application and functions
1
LEDs and connectors
2
Installation, connecting up,
commissioning
3
Configuration and operation
4
Programming the program
blocks
5
Diagnostics and upkeep
6
Technical specifications
7
Dimension drawings
A
Approvals
B
Accessories
C
References
D

Siemens AG
Division Process Industries and Drives
Postfach 48 48
90026 NÜRNBERG
GERMANY
C79000-G8976-C311-02
Ⓟ
10/2016 Subject to change
Copyright © Siemens AG 2015 - 2016.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by
personnel qualified
for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.

CP 1242-7 GPRS V2
Operating Instructions, 10/2016, C79000-G8976-C311-02 3
Preface
Validity of this manual
This document contains information on the following product:
CP 1242-7 GPRS V2
Article number 6GK7 242-7KX31-0XE0
Hardware product version 1
Firmware version V2.1.77
Communications processor for connection of the SIMATIC S7-1200 via GSM mobile wireless
networks
Figure 1 CP 1242-7 GPRS V2
Behind the top hinged cover of the module housing, next to the article number you will see
the hardware product version printed as a placeholder "X" (for example X 2 3 4). In this case,
"X" would be the placeholder for hardware product version 1.
You will find the firmware version of the CP as supplied behind the top hinged cover of the
housing to the left below the LED field.
You will find the IMEI under the lower hinged cover of the housing.

Preface
CP 1242-7 GPRS V2
4Operating Instructions, 10/2016, C79000-G8976-C311-02
Product names
●
CP
In this document, the term "CP" is also used instead of the full product name
"CP 1242-7 GPRS V2".
●
TCSB
TeleControl Server Basic V3, OPC server for telecontrol communication
Purpose of the manual
This manual describes the properties of this module and supports you when installing and
commissioning the device.
The necessary configuration steps are described in the form of an overview.
You will also find instructions for operation and information about the diagnostics options of
the device.
New in this issue
●New functions in the firmware version named above:
–Changed behavior during time-of-day synchronization, see section Time-of-day
synchronization (Page 46).
–Changed selection of supported data types, see section Datapoint types (Page 67).
–Support of S7 routing
●Editorial revision
Replaced manual issue
Release 01/2015
Current manual release on the Internet
You will also find the current version of this manual on the Internet pages of Siemens
Industry Online Support:
Link: (https://support.industry.siemens.com/cs/ww/en/ps/15921/man)
Required experience
To install, commission and operate the CP, you require experience in the following areas:
●Automation engineering
●Setting up the SIMATIC S7-1200
●SIMATIC STEP 7 Basic / Professional
●Data transfer via mobile wireless networks and Internet

Preface
CP 1242-7 GPRS V2
Operating Instructions, 10/2016, C79000-G8976-C311-02 5
Sources of information and other documentation
You will find an overview of further reading and references in the Appendix of this manual.
License conditions
Note
Open source software
The product contains open source software. Read the license conditions for open source
software carefully before using the product.
You will find license conditions in the following document on the supplied data medium:
●OSS_CP124x7_86.pdf
Firmware
The firmware is signed and encrypted. This ensures that only firmware created by Siemens
can be downloaded to the device.
Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, systems, machines and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is
necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial
security concept. Siemens’ products and solutions only form one element of such a concept.
Customer is responsible to prevent unauthorized access to its plants, systems, machines
and networks. Systems, machines and components should only be connected to the
enterprise network or the internet if and to the extent necessary and with appropriate security
measures (e.g. use of firewalls and network segmentation) in place.
Additionally, Siemens’ guidance on appropriate security measures should be taken into
account. For more information about industrial security, please visit
Link: (http://www.siemens.com/industrialsecurity)
Siemens’ products and solutions undergo continuous development to make them more
secure. Siemens strongly recommends to apply product updates as soon as available and to
always use the latest product versions. Use of product versions that are no longer supported,
and failure to apply latest updates may increase customer’s exposure to cyber threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS
Feed under
Link: (http://www.siemens.com/industrialsecurity).

Preface
CP 1242-7 GPRS V2
6Operating Instructions, 10/2016, C79000-G8976-C311-02
SIMATIC NET glossary
Explanations of many of the specialist terms used in this documentation can be found in the
SIMATIC NET glossary.
You will find the SIMATIC NET glossary on the Internet at the following address:
Link: (https://support.industry.siemens.com/cs/ww/en/view/50305045)
Training, Service & Support
You will find information on Training, Service & Support in the multi--language document
"DC_support_99.pdf" on the data medium supplied with the documentation.

CP 1242-7 GPRS V2
Operating Instructions, 10/2016, C79000-G8976-C311-02 7
Table of contents
Preface ................................................................................................................................................... 3
1 Application and functions ........................................................................................................................ 9
1.1 Connecting the S7-1200 to a GSM network .............................................................................9
1.2 Communications services.......................................................................................................10
1.3 Other services and properties.................................................................................................11
1.4 Performance data and configuration limits .............................................................................13
1.5 Requirements for operation ....................................................................................................15
1.6 Configuration examples ..........................................................................................................17
2 LEDs and connectors............................................................................................................................ 23
2.1 Opening the housing...............................................................................................................23
2.2 LEDs .......................................................................................................................................24
2.3 Electrical connections .............................................................................................................27
2.3.1 Wireless interface ...................................................................................................................27
3 Installation, connecting up, commissioning............................................................................................ 29
3.1 Important notes on using the device.......................................................................................29
3.1.1 Notices on use in hazardous areas ........................................................................................29
3.1.2 Notes on use in hazardous areas according to ATEX / IECEx ..............................................30
3.1.3 Notices regarding use in hazardous areas according to UL HazLoc .....................................31
3.2 Installing the CP and commissioning......................................................................................31
4 Configuration and operation .................................................................................................................. 37
4.1 Notes on operation..................................................................................................................37
4.2 Security recommendations .....................................................................................................37
4.3 Configuration in STEP 7 .........................................................................................................40
4.4 Information required for configuration.....................................................................................41
4.5 Connection establishment ......................................................................................................43
4.6 Acknowledgment.....................................................................................................................44
4.7 The wake-up SMS ..................................................................................................................44
4.8 Time-of-day synchronization...................................................................................................46
4.9 STEP 7 configuration..............................................................................................................48
4.9.1 Communication types .............................................................................................................48
4.9.2 Mobile wireless communications settings...............................................................................49
4.9.3 Ethernet interface (X1)............................................................................................................50
4.9.4 Partner stations.......................................................................................................................53
4.9.4.1 Partner stations > Telecontrol server......................................................................................53

Table of contents
CP 1242-7 GPRS V2
8Operating Instructions, 10/2016, C79000-G8976-C311-02
4.9.4.2 Partner for inter-station communication................................................................................. 56
4.9.5 Communication with the CPU................................................................................................ 57
4.9.6 Security .................................................................................................................................. 59
4.9.6.1 E-mail configuration ............................................................................................................... 60
4.9.7 Data points ............................................................................................................................. 61
4.9.7.1 Configuring data points and messages ................................................................................. 61
4.9.7.2 Datapoint types ...................................................................................................................... 67
4.9.7.3 Status IDs of data points........................................................................................................ 68
4.9.7.4 Data point index ..................................................................................................................... 69
4.9.7.5 Read cycle ............................................................................................................................. 69
4.9.7.6 Process image, type of transmission, event classes, triggers ............................................... 70
4.9.7.7 "Trigger“ tab ........................................................................................................................... 73
4.9.7.8 Threshold value trigger .......................................................................................................... 74
4.9.7.9 Analog value preprocessing................................................................................................... 76
4.9.7.10 Partner stations ...................................................................................................................... 82
4.9.8 Messages............................................................................................................................... 83
4.10 Access to the Web server ...................................................................................................... 86
4.11 TeleService ............................................................................................................................ 87
4.11.1 Configuration of the TeleService access ............................................................................... 87
4.11.2 Establishment of a TeleService connection........................................................................... 89
5 Programming the program blocks.......................................................................................................... 93
5.1 Program blocks for OUC........................................................................................................ 93
5.2 Programming SMS messages via OUC ................................................................................ 95
5.3 TC_CONFIG for changing configuration data of the CP........................................................ 98
5.4 IF_CONF: SDT for the configuration data of the CP............................................................ 100
6 Diagnostics and upkeep.......................................................................................................................105
6.1 Diagnostics options.............................................................................................................. 105
6.2 Firmware download.............................................................................................................. 108
6.3 Module replacement ............................................................................................................ 111
7 Technical specifications .......................................................................................................................113
7.1 Technical specifications of the CP ....................................................................................... 113
7.2 Pin assignment of the socket for the external power supply ............................................... 115
A Dimension drawings.............................................................................................................................117
B Approvals ............................................................................................................................................119
C Accessories .........................................................................................................................................125
C.1 Antenna................................................................................................................................ 125
C.2 TS Gateway ......................................................................................................................... 125
D References ..........................................................................................................................................129
Index ...................................................................................................................................................131

CP 1242-7 GPRS V2
Operating Instructions, 10/2016, C79000-G8976-C311-02 9
Application and functions
1
1.1
Connecting the S7-1200 to a GSM network
The CP is intended for use in industrial environments.
IP-based WAN communication via GSM
Using the CP, the S7-1200 SIMATIC controller can be connected to GSM networks. The CP
allows the following types of WAN communication:
●Communication from remote stations to the telecontrol server (TCSB) in the master
station (telecontrol communication)
●Inter-station communication
Communication between stations and the master station (telecontrol communication)
●Direct communication
Direct communication between stations (Open User Communication)
The CP supports the following services for communication via the GSM network and the
Internet:
●GPRS (General Packet Radio Service)
The packet-oriented service for data transmission "GPRS" is handled via the GSM
network.
Note:
The CP is not suitable for GSM networks in which the code multiplex method "Code
Division Multiple Access" (CDMA) is used.
●SMS (Short Message Service)
The CP can send and receive SMS messages.
●E-mail
The CP can send e-mails via the GSM network and the Internet.
The CP supports the following frequency bands:
●850 MHz
●900 MHz
●1 800 MHz
●1 900 MHz
You will find the countries in which the CP is approved on the Internet on the pages of
Siemens Industry Online Support.
Link: (www.siemens.com/mobilenetwork-approvals)
On the Internet page, select the "Entry list" tab and the "Certificates" entry type.

Application and functions
1.2 Communications services
CP 1242-7 GPRS V2
10 Operating Instructions, 10/2016, C79000-G8976-C311-02
1.2
Communications services
The CP 1242-7 GPRS V2 is intended for use in an industrial environment. The following
applications are supported by the CP:
Telecontrol communication
The following applications are possible if telecontrol communication is enabled in the
configuration of the CP.
●Communication with a control center
Remote S7-1200 stations communicate via the mobile wireless network and the Internet
with a telecontrol server in the master station. The telecontrol server communicates with a
higher-level control system using the integrated OPC server function.
●Event-driven sending of messages using SMS or e-mail
Via the mobile wireless network, the CP sends SMS messages to mobile phones or e-
mails to PCs with an Internet connection.
Both types of messages are configured in telecontrol communication in STEP 7. The use
of program blocks is not necessary.
For information on the configuration, refer to sections E-mail configuration (Page 60) and
Messages (Page 83).
●Inter-station communication between S7-1200 stations via the telecontrol server
In this application, the CP establishes a connection to the telecontrol server via the
mobile wireless network. The telecontrol server forwards the messages to the destination
station.
For this communications service, the CP and TCSB use their own protocol on OSI layer 7
that among other things supports certain security functions, see section Other services and
properties (Page 11).
Direct communication via Open User Communication (OUC)
The program blocks of Open User Communication provide the CP with the following
communication options:
●Communication between S7-1200 stations via the mobile wireless network
For this, the CP must be assigned a fixed IP address, see section Other services and
properties (Page 11).
●SMS and e-mail messages via the mobile wireless network
–Sending and receiving SMS messages on mobile phones or S7 stations
–Sending e-mails to PCs with an Internet connection
In contrast to the two corresponding services of telecontrol communication (see above),
to transfer SMS messages/e-mails via OUC, program blocks need to be used, see
section Program blocks for OUC (Page 93).
You will find examples of applications in the section Configuration examples (Page 17).

Application and functions
1.3 Other services and properties
CP 1242-7 GPRS V2
Operating Instructions, 10/2016, C79000-G8976-C311-02 11
S7 communication
Reading / writing data from / to a CPU via the mobile wireless network is possible if S7
communication is enabled in the configuration of the CP.
The following instructions are supported:
●PUT / GET
You will find details on the program blocks in the information system of STEP 7
For S7 communication, the CP requires a fixed IP address, see section Other services and
properties (Page 11).
TeleService via the mobile wireless network
TeleService is possible if the online functions are enabled in the configuration of the CP.
A TeleService connection can be established between an engineering station (PC with
STEP 7) and a remote S7-1200 station via the mobile wireless network and the Internet.
You can use the TeleService connection for the following purposes:
●Downloading project or program data from the STEP 7 project to the station
●Querying diagnostics data on the station
You will find application examples of the structure in the section Configuration examples
(Page 17).
For more detailed information, refer to section Establishment of a TeleService connection
(Page 89).
1.3
Other services and properties
Other services and properties
●
Data point configuration
Due to the data point configuration in STEP 7, programming program blocks in order to
transfer the process data is unnecessary. The individual data points are processed one-
to-one in the control system.
●
IP configuration
The CP is assigned a dynamic or a fixed IP address by the mobile wireless network
provider:
–Dynamic IP address
When using telecontrol communication, the mobile wireless network provider generally
assigns the CP a dynamic IP address. You set this in STEP 7 in the parameter group
"Ethernet interface > Ethernet addresses".
–Fixed IP address
To use S7 communication or to receive data via Open User Communication, the CPU
must be reachable via a fixed IP address. In this case, enter the fixed IP address
assigned by the mobile wireless network provider in the same parameter group.

Application and functions
1.3 Other services and properties
CP 1242-7 GPRS V2
12 Operating Instructions, 10/2016, C79000-G8976-C311-02
●
Time-of-day synchronization
–When telecontrol communication is enabled, the CP obtains its local time of day as
UTC time from the partner (TCSB). The time of day can be read from the CPU. The
mechanisms are described in the STEP 7 information system.
For information on the format of the time stamp, refer to the section Datapoint types
(Page 67).
If telecontrol communication is disabled, the time of day can be obtained from an NTP
server.
–If the security functions are enabled, the secure method NTP (secure) can be used.
For more information, refer to the section Time-of-day synchronization (Page 46).
●
Access to the Web server of the CPU
With the aid of the Web server of the CPU, you can read out module data from the
station.
●
Data buffering: Storage of event data
If a connection fails, the CP can buffer the data of events of different classes and transfer
them bundled to the telecontrol server.
●
Data transfer is on request or triggered
The telecontrol communication with TCSB is triggered in two ways:
–After a request by TCSB or an OPC client connected to TCSB
–Triggered by various selectable criteria
●
Logging status data and its transfer to the telecontrol server
For example:
–Data volumes transferred
–ID of the wireless cell in the area of the station
–GSM signal strength
–Communication status
etc.
●
Analog value processing
Analog values can be preprocessed on the CP according to various methods.
●
Diagnostics SMS message
At the request of a mobile phone, the CP sends an SMS message with diagnostics data
to this mobile phone.

Application and functions
1.4 Performance data and configuration limits
CP 1242-7 GPRS V2
Operating Instructions, 10/2016, C79000-G8976-C311-02 13
Security functions of the CP
The CP supports the following Security functions:
●
Encrypted telecontrol communication
You configure the interval of the key exchange between the CPU and telecontrol server in
STEP 7 in the parameter group "Ethernet interface (X1) > Advanced options > Transfer
settings".
●
Configuring authorized phone numbers on the CP
To authorize nodes allowed to establish a connection to the CP during telecontrol
communication.
●
Telecontrol password
To authenticate the CP with the telecontrol server
●
STARTTLS / SMTPS
For the secure transfer of e-mails
●
NTP (secure)
For secure transfer during time-of-day synchronization (with telecontrol communication
disabled)
●
HTTPS
For secure access to the Web server of the CPU
Note
Plants with security requirements - recommendation
If you have systems with high security requirements, use the secure protocols NTP
(secure)
and HTTPS.
1.4
Performance data and configuration limits
Number of simultaneous connections for telecontrol communication
●1 reserved connection for user data exchange with the telecontrol server
Number of simultaneous TeleService connections
●Max. 1 TeleService connection
Number of simultaneous connections for S7 communication and Open User Communication
A maximum total of 22 connection resources for S7 communication and Open User
Communication (OUC)

Application and functions
1.4 Performance data and configuration limits
CP 1242-7 GPRS V2
14 Operating Instructions, 10/2016, C79000-G8976-C311-02
The maximum number can be divided up as follows:
●S7 connections: Maximum 8
–(PUT/GET)
●OUC connections: Maximum 8
–TCP connections
–ISO-on-TCP connections
–UDP connections
●Additional free resources for S7 or OUC connections: Maximum 6
Number of connections to NTP servers
●Max. 1 connection to an NTP server
Number of possible partners for inter-station communication
●Max. 13 CPs as partners for inter-station communication
Of which:
–Max. 3 sending partners
–Max. 10 receiving partners
●Partners can be S7-1200 CPs with data point configuration and use of the protocol
"TeleControl Basic".
User data
With the connection types listed below, the user data of a frame represent a consistent data
area in terms of the time of transfer.
User data per frame with the various connection types:
●For TCP connections: Max. 8192 bytes
●For ISO-on-TCP connections: Max. 1452 bytes
●For UDP connections: Max. 1472 bytes
With frames of telecontrol communication, the individual values of the data points are time
stamped.
Number of data points for the data point configuration
The maximum number of configurable data points is 200.
Frame memory (send buffer)
The CP has a frame memory (send buffer) for data points configured as an event.

Application and functions
1.5 Requirements for operation
CP 1242-7 GPRS V2
Operating Instructions, 10/2016, C79000-G8976-C311-02 15
The send buffer has a maximum size of 64 000 events divided into equal parts for all
configured communications partners. The size of the frame memory can be set in STEP 7.
See also section Process image, type of transmission, event classes, triggers (Page 70).
Messages: E-mail / SMS
Up to 10 messages can be configured in STEP 7 and sent as e-mails or SMS messages.
Maximum number of characters that can be transferred per SMS message: 160 ASCII
characters including any value sent at the same time
Maximum number of characters that can be transferred per e-mail: 256 ASCII characters
including any value sent at the same time
1.5
Requirements for operation
Hardware requirements
Apart from the CP. the following hardware is required in the S7-1200:
●A CPU with firmware version as of V4.1
To use the full range of functions, a CPU with a firmware version as of V4.2 is required.
●An external antenna for the CP
Use only the antenna from the accessories program for the CP, refer to the appendix
Antenna (Page 125).
●For telecontrol communication, a PC with an Internet connection is required for the
telecontrol server in the master station.
●If you intend to use TeleService via mobile wireless, a TeleService gateway with Internet
access is required for configurations without a telecontrol server. This is a PC on which
the "TS Gateway" software is installed, see appendix TS Gateway (Page 125).
Configuration software
To use the full range of functions the following configuration tool is required to configure the
module:
STEP 7 Basic V14
Program blocks for Open User Communication and S7 communication
For Open User Communication and S7 communication, program blocks are required, see
section Communications services (Page 10).

Application and functions
1.5 Requirements for operation
CP 1242-7 GPRS V2
16 Operating Instructions, 10/2016, C79000-G8976-C311-02
Software for telecontrol communication and TeleService
The CP is configured in "Telecontrol" mode.
●For the telecontrol communication
The telecontrol server requires the "TCSB" (TeleControl Server V3) software in the
master station.
●For TeleService
For TeleService a switching station is required between the CP and the engineering
station (with STEP 7 in the version specified above).
This is either the telecontrol server or a TeleService gateway:
–When using telecontrol communication, the telecontrol server is the switching station.
–To use TeleService without a telecontrol server, the "TS Gateway" software is required
for the TeleService gateway.
The software and the manual describing it are on the DVD that ships with the CP.
For the documentation of the application, see /4/ (Page 130) or /3/ (Page 130) in the
References.
Requirements for using mobile wireless services
●Local availability of a mobile wireless network in the range of the station.
●A contract with a suitable mobile wireless network provider
The contract must allow the transfer of data.
IP address:
–For communication with the telecontrol server, a private (fixed) or public (dynamic) IP
address assigned by the mobile wireless network provider can be used.
–For direct communication between S7 stations (S7 communication and Open User
Communication via T blocks) the mobile wireless network provider must assign a fixed
IP address to the CP and forward the frames to the destination nodes.
●The SIM card and PIN belonging to the mobile wireless contract
The SIM card is inserted in the CP.
With mobile wireless contracts in which the network provider does not assign a PIN, no
PIN is necessary for the configuration of the CP.
●Access point (Access Point)
For the transition between the mobile wireless network and Internet you require an
access point. The name of the access point (APN) and the access data are configured for
the CP in STEP 7.
Generally the mobile wireless network providers make an access point available.
Note the information on APNs in the section Security recommendations (Page 37).

Application and functions
1.6 Configuration examples
CP 1242-7 GPRS V2
Operating Instructions, 10/2016, C79000-G8976-C311-02 17
1.6
Configuration examples
Below, you will find configuration examples for stations with a CP 1242-7 GPRS V2.
SMS messages and e-mails
Figure 1-1 Sending messages by SMS from an S7-1200 station
SMS
The CP can send SMS messages to a mobile phone or a configured S7-1200 station and
receive from these nodes. The mechanisms for this are as follows:
●SMS messages generated and sent as the result of an event.
For a description of the configuration, refer to the sections Diagnostics and upkeep
(Page 105) and Messages (Page 83).
●SMS messages that are sent or received due to calling the corresponding program blocks
of Open User Communication.
You will find information on the blocks in the section Program blocks for OUC (Page 93),
you will find the description of the programming in the STEP 7 information system.
●Using a mobile phone, a diagnostics SMS can be requested, see section Diagnostics and
upkeep (Page 105).
For all mobile phones that send SMS messages to the CP, the authorize phone number
must be specified in the STEP 7 configuration of the CP (parameter group "Security >
Authorized phone number").

Application and functions
1.6 Configuration examples
CP 1242-7 GPRS V2
18 Operating Instructions, 10/2016, C79000-G8976-C311-02
E-mails
The CP can send e-mails to a PC with an Internet connection or a mobile phone. The
mechanisms for this are as follows:
●E-mails generated and sent as the result of an event.
For a description of the configuration, refer to the sections Configuring data points and
messages (Page 61), Messages (Page 83) and E-mail configuration (Page 60).
●E-mails sent as a result of calling the program block TMAIL_C.
You will find information on the blocks in the section Program blocks for OUC (Page 93),
you will find the description of the programming in the STEP 7 information system.
If you want to use the secure transfer of e-mails, the CP must have the current time of day.
Telecontrol by a control center
Figure 1-2 Communication between S7-1200 stations and a control center
In the telecontrol applications, the CP communicates with a telecontrol server with an
Internet connection via the mobile wireless network. The "TeleControl Server Basic V3"
(TCSB) application is installed on the telecontrol server in the master station. This results in
the following use cases:

Application and functions
1.6 Configuration examples
CP 1242-7 GPRS V2
Operating Instructions, 10/2016, C79000-G8976-C311-02 19
●Communication between a station and a control room with OPC client
The station communicates with the telecontrol server. Using its integrated OPC server,
the telecontrol server exchanges data with the OPC client of the control room.
The OPC client and telecontrol server can be located on a single computer, for example
when TCSB is installed on a control center computer with WinCC.
●Inter-station communication via a control center
Inter-station communication is possible with S7 stations equipped with a suitable
telecontrol CP: CP 1243-1, CP 1242-7 GPRS V2, CP 1243-7 LTE
To allow inter-station communication, the telecontrol server forwards the messages of the
sending station to the receiving station.
Direct communication between stations
Figure 1-3 Direct communication between two S7-1200 stations
In this configuration, two SIMATIC S7-1200 stations communicate directly with each other
using the CP via the mobile wireless network. Each CP has a fixed IP address. The relevant
service of the network provider must allow this.
TeleService via the mobile wireless network
In TeleService via the mobile wireless network, an engineering station on which STEP 7 is
installed communicates via the mobile wireless network and the Internet with the CP in the
S7-1200.
Since the firewall of the network provider is normally closed for connection requests from the
outside, a switching station between the remote station and the engineering station is
required. This switching station can be a telecontrol server or, if there is no telecontrol server
in the configuration, a TeleService gateway.

Application and functions
1.6 Configuration examples
CP 1242-7 GPRS V2
20 Operating Instructions, 10/2016, C79000-G8976-C311-02
TeleService with telecontrol server
The connection runs via the telecontrol server.
●The engineering station and telecontrol server are connected via the Intranet (LAN) or
Internet.
●The telecontrol server and remote station are connected via the Internet and via the
mobile wireless network.
The engineering station and telecontrol server can also be the same computer; in other
words, STEP 7 and TCSB are installed on the same computer.
Figure 1-4 TeleService via the mobile wireless network in a configuration with telecontrol server