Remote access of data is convenient since it allows you to save time because you can save a trip out to a field location by accessing the data through a computer or text message. With remote access you can check status, close a valve, adjust temperature or turn lights off from a remote location. You can save money on travel expenses or major repairs through automatic alarms via email or text message.
You can access your applications through a web-based supervisory control and data acquisition system. With KingView Runtime and KingView Web Publishing on a PC, you can remotely access your system with a web browser. You can use the system remotely in the same way as you can on location. You can change the screens in the SCADA system, generate reports, and trend curves. You can view the status of measurements like temperature or where your application is in a process. You can open or close valves or shut systems off with control buttons.
A cellular router like IR711GS55 can grant you remote access to your systems. You can establish a VPN (Virtual Private Network) with cellular routers and gain access to your remote PLC’s via Ethernet, RS-232 or RS-485 ports. Cellular routers provide practical management of your devices and reduce maintenance costs.
You can also remotely access your applications via SMS text message. GT-531 is an intelligent Modbus SMS / GSM gateway for M2M applications. With GT-531 you can send and receive SMS messages between phones, a PC and your control system. You can send messages to up to 256 mobile phones. The content of the text messages can be changed through Modbus protocol.
You can use a programmable automation controller like G-4500P-3GWA with a built in Tri-band 3G modem to easily gain remote access. You can write your C Language program such that you can send and receive text messages and emails with your remote system to get status and make changes. G-4500P-3GWA also has GPS functions so you can use it on moving vehicles like trains and trucks and you can retrieve its GPS location.
You can use an Ethernet based data acquisition modules which support Modbus TCP protocol. ET-7019 has a web server inside for remote access. You can pull it up on a computer via web browser by its IP address. You can create different users for the ET-7019 and passwords through the web interface. You can turn channels on or off with buttons in the web page. You can also see measurement status of current, voltage or thermocouple input. You can easily use ET-7019 with your SCADA software through Modbus TCP protocol.