SELLA CONTROLS is pleased to announce that we have recently been awarded a contract by British Steel to design and supply a new PLC control system for the Hunslet Shunting Locomotives at its Scunthorpe site.
SELLA CONTROLS have a long association with these locomotives. In 1990 we supplied a fail-safe radio control system to RFS Engineering who had the contract to convert the locomotives to radio control operation. As part of this contract a Square-D SY/MAX PLC was installed for interfacing the radio control and manual controls to control the loco. Some 10 years later, in 2000, SELLA CONTROLS won a contract from British Steel to upgrade the radio control system and extensively re-program the Square-D PLC for new control functions.
The Square-D PLC has become impossible to maintain and repair as it has been obsolete for many years. As part of this contract SELLA CONTROLS will be replacing the Square-D PLC with a Siemens S7 PLC and will be providing new functionality including event recording.
The contract is for the supply, design and integration of the S7 PLC and wiring plus new software for the first loco. Providing it all goes well there will be further orders as British Steel slowly upgrades its other Hunslet locos.