Sipansihaporas Hydro Plant
This project involved the automation and remote control of two Toshiba
turbines, two switch-yards and all associated auxiliaries using two
Schneider Quantum hot-standby controllers. These were networked together
and to a FactoryLink supervisory system using a redundant Ethernet ITP
network and Power Line Carrier.
The upstream power station (35MW) is controlled based on a power output
set-point. This set-point can be entered directly by the operator as a
constant value or as a daily schedule, which the PLC repeats on a daily
basis. The downstream station (17MW) is controlled automatically by the PLC
based on the water level in the head tank between the two stations.
Sipansihaporas Case Study [PDF]
This project involved the control of an accumulation conveyor, storing
6000 products in 14 parallel lanes on 6 levels. Three Siemens S7-300 PLCs
were used to control 35 variable speed drives, 60 DOL motor starters and 54
Horizon Automation Solutions Ltd. first produced a detailed control
system specification. This was followed by factory simulation and testing
to ensure the concepts designed would work in practice, and then a
simulated demonstration for the customer before export of the system to Holland.
Commissioning and handover took place over 3 weekends to ensure minimum
disruption to the process.
Ballyogan Recycling Park
The Ballyogan Recycling
Park system consists of a
network of 4 Schneider PLCs, which manage the plant’s water systems,
and a state-of-the-art SCADA system, communicating over a Unitelway
The SCADA system includes animated mimics, user and role based security
and real-time and historic view of all alarms, events and analog signals.
ESB Ardnachusha and Cliff
Hydro Power Stations
Ardnacrusha consists of three Francis and one Kaplan turbine controlled
by Neyrpic governors and supervised by Siemens Simatic S5-115H hot-standby PLCs.
Cliff consists of two 10MW Francis turbines controlled by Woodward
governors and supervised by Siemens Simatic S5-115H PLCs.
Both projects involved Horizon Automation Solutions Ltd. reviewing the
signals transferred over the Modbus RTU communications link between the
governors and PLCs to allow for the upgrade of the main SCADA system.