SIEMENS
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Siemens IK PI · 2015
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Function
(continued)
Industrial Remote Communication
TeleControl Basic for the stations
CP 1242-7 GPRS module
7
Operating modes
The CP 1242-7 can be used in two different operating modes:
TeleControl server
In this mode, communication with the control center and other
telecontrol stations is handled via a central TeleControl server.
The CP 1242-7 is connected to the TeleControl server. The
TeleControl Server Basic software both forwards the data to the
control station or other telecontrol stations and monitors it.
GPRS Direct
In this mode, the CP 1242-7 communicates direct with a control
center or other telecontrol stations. In contrast to TeleControl
mode, this requires no TeleControl server or additional software.
This mode can be selected if there is a guarantee that the
communication partners of the station can be reached using a
unique address. To ensure this, special network operator
services, frequently referred to as machine-to-machine (M2M),
have to be used in normal cases.
Configuration
All the necessary information (provider data, access rights,
operating modes) is configured with STEP 7. STEP 7 Basic V11
or higher is required for configuring the CP 1242-7.
The data can also be reconfigured during runtime. A special
library function is available for this purpose.
Data buffering
Brief connection failures in the mobile wireless network are
bridged by data buffering. When the connection has been
restored, the buffered data is time-stamped and sent.
Time synchronization
The mechanism for time-of-day synchronization of the
CP 1242-7 can be set dependent on the operating mode.
If a TeleControl server is used in the control center, the control
center forwards the time of day to all substations. If TeleControl
Server Basic is not used, synchronization can take place via an
NTP server.
The CPU program can use this time to set the internal time-of-
day for the station.
Function library
A function library for the following functions is available for the
CP 1242-7:
•
Data exchange: Send and receive functions enable data
exchange with other stations or with the control center.
•
Sending/receiving text messages
•
Configuration: Reconfiguring can take place during operation
with the help of a function block
Diagnostics/remote maintenance
An online connection to a remote S7-1200 station with
CP 1242-7 can be established from STEP 7 via GPRS/Internet.
After the connection has been established, all the familiar online
functions for remote maintenance (download, diagnostics) are
available.
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Technical specifications
Article No.
6GK7242-7KX30-0XE0
Product-type designation
CP 1242-7
Transmission rate
Transfer rate with GPRS transmission
• with uplink maximum
43 kbit/s
• with downlink maximum
86 kbit/s
Wireless technology
Type of mobile wireless service
• is supported
- SMS
Yes
- GPRS
Yes
• note
GPRS (multislot Class 10)
Type of mobile wireless network is
supported
• GSM
Yes
• UMTS
No
Operating frequency
• 850 MHz
Yes
• 900 MHz
Yes
• 1800 MHz
Yes
• 1900 MHz
Yes
Transmit power
• at operating frequency 850 MHz
2 W
• at operating frequency 900 MHz
2 W
• at operating frequency 1 800 MHz
1 W
• at operating frequency 1 900 MHz
1 W
Interfaces
Number of electrical connections
• for external antenna(s)
1
• for power supply
1
Number of slots for SIM cards
1
Design of the electrical connection
• for external antenna(s)
SMA socket (50 ohms)
• for power supply
3-pin terminal strip
Design of slot for SIM card
Slot under front flap
Supply voltage, current
consumption, power loss
Type of supply voltage
DC
Supply voltage external
24 V
Relative positive tolerance at 24 V with
DC
20 %
Relative negative tolerance at 24 V
with DC
20 %
Consumed current from external sup-
ply voltage at 24 V with DC
• typical
0.1 A
• maximum
0.22 A
Resistive loss
2.4 W
Article No.
6GK7242-7KX30-0XE0
Product-type designation
CP 1242-7
© Siemens AG 2014