Siemens LOGO! CMR2040 Operating Instructions Manual page 17

Messages
Sending SMS messages and e-mails
From internal events and events coming from the process reactions can be generated by the
WBM that lead to information, diagnostics and alarm SMS messages or e-mails being sent.
Receiving SMS messages
Using SMS messages, the outputs of the CMR and the BM can be written. The authorization
is checked by comparing the phone number of the sender with the configured phone
numbers. Password protection is optional.
Example of the SMS text for writing a single bit with the value zero:
<Password>;LOGO=VM115.1,0,BIT
Functions for simplifying SMS syntax:
● Alias SMS
Configuration of symbolic names as placeholders for the entire SMS text
● Constants for values that are repeated
Configuration of symbolic constants as placeholders for values to be written that are
repeated
● Use of signal names as parameters in SMS messages
Configuration of signals as placeholders for variables of the BM
You will find the relevant information in the following sections:
● Diagnostics > Notifications (Page 76)
● WAN > SMS (Page 92) and the following
● Users / groups > User (Page 104) and > Recipient groups (Page 106)
● Monitoring > Constants (Page 111)
● Monitoring > Message texts (Page 113)
● Monitoring > Signals (Page 113)
and
● Response of the CMR when receiving an SMS message/replying to SMS message
(Page 163) and the following
OpenVPN
You can use the VPN technology of OpenVPN for the secure transfer of data via the mobile
wireless connection of the CMR. A VPN tunnel is established between the CMR and the
connection partner (mobile phone/tablet, PC). In this case the CMR is the OpenVPN server,
the partner (mobile phone, PC) is the OpenVPN client.
In addition to this you can use OpenVPN for direct communication with the BM if the CMR is
entered as a router with the BM.
The CMR RTU uses OpenVPN version V2.3.11.
LOGO! CMR2020, LOGO! CMR2040
Operating Instructions, 10/2016, C79000-G8976-C356-03
Application and functions
1.2 Further functions
17