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MODBUS TCP). It will also necessary to disable DHCP in the settings of EM-481, or configuring the router for the
provision of EM-481 via DHCP of always the same IP address;
– Verify if the Internet connection of EM-481 is protected by standard means (see below);
– When referring the EM-481 unit via Internet, use IP-address provided by your ISP.
4. GSM connection
ATTENTION! THE USER IS STRONGLY RECOMMENDED TO CONNECT THE UNIT TO INTERNET UNDER THE
SUPERVISION OF REPRESENTATIVE OF MOBILE SERVICE PROVIDERS.
Make sure that your tariff plan includes providing GPRS service (for connection to Internet) and/or
receiving and sending SMS messages (for control via SMS).
To connect the EM-481 device via GSM, use the following recommendations:
– From GSM provider (hereinafter referred to as a provider) you should get a SIM-card;
– Insert the SIM-card in the device and connect the appropriate antenna to have a proper radio signal in the
place of the EM-481 device location;
– After starting the device, make sure that SIM-card has a correctly identification - after the communication
initialization, the indicator GSM keeps on blinking; if the indicator is off for the time longer than 4 seconds,
check the SIM-card, antenna and a level of GSM signal on the display of the device;
– If GPRS or HSPA are used for Internet connection, make sure, that the provider and settings are correct via
code of SIM-card - when you enter the Internet, the GSM indicator flashes 3 times per second; if the
indicator flashes less frequently, check the APN settings;
– In case of necessity, manually set the APN in accordance with the provider's recommendations.
5. Protection of connection:
– EM-481 has basic protection against unauthorized access via network;
– Access for writing and/or reading via Modbus TCP or via SMS can be deactivated in settings;
– The device settings can be changed remotely by entering the password (minimum 5 characters). Entering
several incorrect passwords while trying to determine the correct one is blocked by the unit;
– Access passwords can be set for restriction of writing and/or reading via Modbus TCP or via SMS;
– When entering the password, all settings shall be only available to a given client using a given protocol. In
case of no requests from the client over the long period, the access returns to locked mode;
ATTENTION! DURING ANY CONNECTIONS EXCEPT FOR TRANSMITTING VIA GSM AND COMMUNICATION
WITH SERVER VIA SPECIAL PROTOCOL EM-481, THE PASSWORDS ARE SENT IN NOT PROTECTED MODE; IN
CASE OF CORRECT PASSWORD THE ACCESS OPENS IN NOT PROTECTED CONNECTION.
– The unit protection system is not designed to counter malicious network attacks (especially those, which are
not trying to get access to the unit but to block it instead);
– In case of complex and large networks (especially when providing access to the ET-481 via Internet), the
users are recommended to separate the unit from unprotected networks with standard protective equipment
(router, configured to filter the transmissions, Firewall, etc.).
6. Connection to the server
EM-481 has the mode of constant communication with the data collection and management server. For example
Overvis system can be as a server (Internet-address: overvis.com).
Overvis – it is a system for monitoring and remote control of technological processes. Overvis makes it possible
to read the data and make control over the devices including EM-481, provided there is a connection with them, to
save the data in the base, review the data in appropriate form, to receive alarm messages as SMS or e-mail.
EM-481 factory settings are prepared for connection to Overvis.
Overvis system supports a special manner of identification which is used in EM-481. In addition the devices are
verified by a unique MAC-address which is sent to the server at each connection session. The device registration
for a user of the Overvis system is possible in two ways:
a) if the device has a sticker with a QR code - read the code and follow the link, or enter the link from the
sticker manually, and then follow the server instructions ;
b) to specify the activation code to a user account of Overvis. The code represents the number of 8 characters
and is displayed on the display and on the status page of the WEB interface of the product after connecting to the
server. When you enter code EM-481 is "attached" to a user account.
To connect a new device to the Overvis system using activation code you should:
–
connect the EM-481 device to Internet via one of above mentioned methods;
–
make sure (by information on the display or on the page of parameters of the unit WEB-interface state) that
the connection to the server is made and the activation code is received;
Server:
(E) 85629051
EM-481
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Fig. B.3 – Image of the activation code on the display
NOVATEK-ELECTRO
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