Online monitoring of gas turbine power plant using modbus/TCP

This paper presents design and performance enhancement of the monitoring system of a power plant, specifically based on Modbus/TCP configuration. Also, Establishing the Modbus/TCP connection and method of obtaining the redundancy and cycle time calculation is presented. The approach is based on the Siemens PLC S7-417H and the related hardware (Step7) and software (process Control System: PCS7) to establish the Modbus/TCP connection to communicate with Hitachi H25 system. The results of this research have been tested in the ESLAMABAD gas turbine power plant. This approach is very robust and could be used in the same applications.