Notes on configuration and operation
5.3 The wake-up SMS
CP 1242-7 V2
Operating Instructions, 05/2014, C79000-G8976-C311-00
37
Triggering connection establishment for permanent stations ("Telecontrol" mode)
In the "Telecontrol" mode, the permanent connection to the telecontrol server is established
when the station starts up. If the connection is interrupted, the CP attempts to re-establish
the connection at 15 minute intervals. Connection establishment to the main or substitute
server can, however, also be initiated by a wake-up SMS (see below).
Note
Cyclic data exchange with the telecontrol server
The special settings for cyclic data exchange initiated by a telecontrol server are described in
the section The S7-1200 sends data to the master station).
Triggering connection establishment in "GPRS direct" mode
In "GPRS direct" mode, a connection establishment is triggered by the following events:
Event on the local CPU that is evaluated by the program.
Request for TeleService by an engineering station
The wake-up frame (SMS) from the TeleService gateway does not need to be evaluated
in the program.
5.3
The wake-up SMS
Right to wake-up by "authorized phone numbers"
The CP only accepts an SMS if the sending communication partner is authorized based on
its phone number. These numbers are in configured for the CP in STEP 7 in the "authorized
phone numbers" list.
"Authorized phone numbers" in the STEP 7 project
A phone number entered here gives the sender who transfers this phone number the right
to trigger connection establishment.
If only an asterisk (*) is entered in the list, the CP accepts SMS messages from all
senders.
An asterisk (*) after a phone number body authorizes connection establishment for all
nodes connected to the body (extension numbers).
Example: +49123456* auth49123456101, +49123456102, +49123456207 etc.
Note
No wake-up without an authorized phone number
If the "Authorized phone numbers" list is empty, the CP cannot be woken up for
connection establishment.
