All AutoLog® PLC devices can operate as RTU (Remote Terminal Unit) devices. Actually most of AutoLog® PLCs are operating as RTU devices. AutoLog® RTU device is programmable logic controller, which is especially designed to communicate with remote control room (SCADA), using the most suitable communication network.
FF-Automation has three decades of experience in designing, manufacturing and commissioning Remote Terminal Unit (RTU) devices for numerous projects. For example world's biggest oil and gas producer companies trust their production on AutoLog® RTU devices.
Typical Remote Terminal Unit applications
AutoLog® RTU devices are suitable for monitoring and controlling target applications both locally and remotely. AutoLog® RTU can be programmed as PLC device to control the most demanding target applications locally without user interaction or user can monitor the measurement data and make controls from the remote control room. In most cases, RTU application includes both local and remote control.
Typical target applications are oil and gas pipelines, wellheads, valves, pumping stations, tanks, electrical transformer stations, real estates, vehicles (AVL), weather stations etc. This is just a list of typical applications, it doesn't mean that AutoLog® RTUs are tied to any specific applications; using its modular I/O and freely programmed application program and high connectivity, it can be used in any remote supervision and control application.
Combines traditional PLC -features...
AutoLog® RTU has all the traditional PLC features including e.g. numerous I/O combination possibilities, plug-in analog input modules, build-in Modbus RTU (master/slave) communication protocol, connections for various local HMI user interfaces, plug-in serial port communication conversion modules, 32 build-in PID controllers, multi-featured PLC programming etc.
...with RTU features.
AutoLog® RTU is modular, flexible and more or less customized product. It is constructed to fill customer's application needs. E.g. the following features affects the final construction of AutoLog® RTU:
- Communication network used? Modem selection. Antenna selection.
- What is the target application? PLC selection. I/O quantity and type selection. Application programming.
- What are environmental conditions? Enclosure IP / NEMA class, surge protection.
- Out of power network? Power consumption? Low power PLC, solar panel, accumulator.
- Is local HMI needed?
- How is the RTU mounted / installed?
- Is customized look, size, e.g. needed?
- Is GPS positioning needed?
- etc.
Programming (locally or remotely)
AutoLog® RTU devices can be programmed with FF-Automation's AlProWin programming tool. The programming language includes over 260 functions, sequential controls, ladder, symbolic variable names, trend lines for testing etc. RTUs can be programmed locally or remotely e.g. through radio / PTSN / GSM or Ethernet LAN / Internet network.
Communication
AutoLog® RTU (Remote Terminal Unit) device can communicate using variety of wired and wireless networks. FF-Automation can help the customer for selecting the most suitable communication media for their application. AutoLog® RTU can communicate using e.g. wired RS-232/422/485, PSTN-, Ethernet LAN- and Internet networks or wireless GSM/SMS, GPRS/FTP, GSM/Data, radio modem, satellite, WLAN or TETRA/SDS networks.
Modbus RTU master/slave connection
AutoLog® RTU has build-in Modbus RTU communication protocol. It can run as master or slave. Different serial ports can run Modbus protocol simultaneously e.g. Ser1 can run as Modbus master and Ser2 as Modbus slave. Modbus RTU is the most common automation protocol and it can be used to connect RTU with SCADA, with other RTUs and with other Modbus devices like energy meters. RTU can also act as Modbus router between two Modbus networks.
Data logging
AutoLog® RTU (Remote Terminal Unit) devices can time-stamp and store (log) measurement data into its memory e.g. during communication break. The log can be read to control room SCADA after the communication break.
Wireless I/O
In addition to normal I/O, AutoLog® RTU can optionally connect with wireless I/O. Wireless I/O can be used e.g. to collect data and to control devices in the limited area. Look more from the Accessories -pages!
Local HMI display
Customer can connect local HMI directly to RTU's serial or I2C port. Customer can select right HMI from multi-featured graphical touch screens with full Web Studio SCADA support to small keypad/character displays. Look more information from the AutoLog® HMI -pages!
Control room, SCADA
AutoLog® RTU can connect to any SCADA systems on the market that supports Modbus RTU protocol. FF-Automation distributes Web Studio SCADA, which have the build-in web capabilities so all the graphical SCADA views can be seen through the Intranet / Internet. Look more from the SCADA -pages!
Low power features
AutoLog® PLC product family has models which are developed especially for low power consumption applications where the device is used outside the electrical network. Low power models have configurable power save modes. RTU Remote terminal unit can be powered using 12/24V accumulator with build-in over-charge protection system. Accumulators can be charged using e.g. solar panels.
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