RealFLO™ Multi-run Gas Flow Computer Software Features & Benefits

Modbus Protocol Interface

The software is completely configurable and accessible using standard Modbus protocol commands generated by the RealFLO configuration utility or any other host computer equipped with Modbus. Configuration and historical data retrieval can be done locally or through the SCADA network. Gas composition can be changed from the SCADA master. Field technicians do not need laptop computers or flow computer training when changing orifice plates.

Standard EFM Modbus Interface

Standard electronic flow measurement (EFM) interface is used with Enron Modbus SCADA systems. This standard interface allows SP series GFCs to be integrated into existing EFM SCADA networks. The unique architecture provides two simultaneous methods of communication with one SS 4203 GFC, even if only one communication port is used. The first method of communication accesses data through a uniquely addressed standard EFM Modbus interface. The second accesses data through the usual Modbus addressed RTU/PLC interface. Flow measurement data is obtained by addressing the EFM Modbus interface while the Modbus protocol interface is used for monitoring and programming ladder logic programs online, collecting logged data and downloading custom C programs.

Programmable for Control

RealFLO executable code is a software extension in SP series PLCs. This means that the controller’s relay ladder logic, multitasking C/C++ programmability or IEC 61131 and programmability remains available for sequencing and feedback control applications. You can use the SS 4203 GFC to measure gas flow while relay ladder logic, proportional-integral-derivative (PID) controllers, and C/C++ programs can be used to control the process, switch meter runs, etc. RealFLO software combines the functions of a PLC, a multi-run flow computer and an RTU, in a compact, costeffective package

Universal Primary Variable Interface

The program is compatible with 4 to 20 mA/1 to 5 Vdc transmitters plus single or multivariable transmitters (MVT) using HART, Modbus and Ethernet. If you choose to use an SS 4102 MVT or other Modbus-based MVT, the software allows you to completely configure and calibrate the transmitter from within the RealFLO configuration utility.

Versatile Communications

All components support radio, Ethernet, dial-up modem and dedicated modem communications. This versatility allows users to configure the SS 4203 GFC, download new C programs and monitor and change logic programs remotely over the communications network. Future upgrades to the controller firmware and AGA standards can be remotely implemented.

Input/Output Expandable to Over 650 Points

The software uses the powerful SP series controllers as its hardware platform. With standard input/output (I/O) counts from as small as four points, these PLC/ RTU controllers can be expanded to more than 650 I/O points, simply by plugging in more I/O modules. You can use the same hardware for all your oil and gas automation needs.