Notes on operation
4.2 The wake-up SMS
CP 1242-7
Operating Instructions, 09/2011, C79000-G8976-C247-02
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Telephone wake-up SMS
The wake-up SMS can be sent from a telephone that has a phone number authorized in
the STEP 7 project. The telephone must support the CLIP function (transfer of its own call
number) and the sending of SMS messages.
The connection establishment with the telecontrol server specified in the SMS is
triggered.
When a temporary station is woken up, all the data is transferred if this has changed since
the last data transfer.
Triggering connection establishment in "GPRS direct" mode
In "GPRS direct" mode, a connection establishment is triggered by the following events:
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Event on the local CPU that is evaluated by the program.
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Request by a communications partner (not an engineering station)
The request in the frame received from the communications partner is evaluated in the
program by calling the telecontrol instructions.
●
Request for TeleService by an engineering station
The request switched by TeleService gateway does not need to be evaluated in the
program.
4.2
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.
NOTICE
"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 an asterisk (*) is entered in the list, the CP accepts SMS messages from all senders.
If the list is empty, the CP cannot be woken up for connection establishment.
Wake-up call and wake-up SMS
The CP is woken by its communications partner using a wake-up call or a wake-up SMS and
requested to establish the connection to the partner.
Depending on the connection type and the connection partner, the following text must be
transferred in the wake-up SMS:
