Configuration and operation
4.9 STEP 7 configuration
CP 1242-7 GPRS V2
84 Operating Instructions, 10/2016, C79000-G8976-C311-02
Triggering sending of messages
You configure the triggering of the individual messages (e-mail, SMS message) in the
"Trigger" tab of the message editor with the parameter "E-mail trigger".
One of the following events triggers sending of the message:
● CPU changes to STOP.
● CPU changes to RUN.
● The connection to the partner is interrupted.
● The connection to the partner is re-established.
● Connection establishment has failed.
● TeleService session has started.
● TeleService session has ended.
● The E-mail trigger "Use PLC tag" is triggered.
For the trigger to send the message, the edge change (0 → 1) of the trigger bit "PLC
variable for trigger" is evaluated. The trigger bit must be set by the user program. A
separate trigger bit can be configured for each message.
If the memory area of the trigger bit is in the bit memory or in a data block, the trigger bit
is reset to zero when the message is sent. In all other cases, you need to reset the trigger
bit with the user program
● Weak mobile wireless network (only for sending SMS messages)
Requirements and necessary information
Remember the following requirements in the CP configuration for the transfer of messages:
● Enabling telecontrol communication ("Communication types") parameter group
● Activating security functions
● Additionally for e-mails: Configuring the "E-mail configuration" parameter group
To do this, you require the following information:
– Access data of the SMTP server: Address, port number, user name, password
When using STARTTLS or SSL/TLS: Certificate of the e-mail service provider
– Email address of the recipient
Include value: Transfer the value of a PLC tag with a message
If you enable the option "Include value" in the "Trigger" parameter group, the CP sends a
value for the placeholder $$ from the memory area of the CPU in the message. To do this
enter "$$" as a placeholder for the value to be sent in the message text.
Select a PLC tag whose value will be integrated in the message. The value is entered in the
message text instead of the placeholder $$.
$$ can be a placeholder for data point types with a simple data type up to a size of 32 bits.
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